./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/verifythis/prefixsum_iter.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 2329fc70 Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68d1f820-b3bd-44ff-981c-6d5644e6ec24/bin/utaipan-gh47qXpMRh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68d1f820-b3bd-44ff-981c-6d5644e6ec24/bin/utaipan-gh47qXpMRh/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68d1f820-b3bd-44ff-981c-6d5644e6ec24/bin/utaipan-gh47qXpMRh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68d1f820-b3bd-44ff-981c-6d5644e6ec24/bin/utaipan-gh47qXpMRh/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/verifythis/prefixsum_iter.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68d1f820-b3bd-44ff-981c-6d5644e6ec24/bin/utaipan-gh47qXpMRh/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68d1f820-b3bd-44ff-981c-6d5644e6ec24/bin/utaipan-gh47qXpMRh --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 4cd641fa41c29ed0240eed782d3555502472fe8bb63d504547076d8eeefa2c0d --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-2329fc7 [2022-12-14 06:59:55,756 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-14 06:59:55,758 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-14 06:59:55,776 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-14 06:59:55,777 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-14 06:59:55,778 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-14 06:59:55,779 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-14 06:59:55,780 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-14 06:59:55,782 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-14 06:59:55,783 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-14 06:59:55,784 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-14 06:59:55,785 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-14 06:59:55,785 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-14 06:59:55,786 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-14 06:59:55,787 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-14 06:59:55,788 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-14 06:59:55,789 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-14 06:59:55,790 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-14 06:59:55,792 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-14 06:59:55,793 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-14 06:59:55,795 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-14 06:59:55,796 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-14 06:59:55,797 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-14 06:59:55,798 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-14 06:59:55,802 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-14 06:59:55,802 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-14 06:59:55,802 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-14 06:59:55,803 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-14 06:59:55,804 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-14 06:59:55,805 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-14 06:59:55,805 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-14 06:59:55,806 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-14 06:59:55,806 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-14 06:59:55,807 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-14 06:59:55,808 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-14 06:59:55,808 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-14 06:59:55,809 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-14 06:59:55,809 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-14 06:59:55,810 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-14 06:59:55,810 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-14 06:59:55,811 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-14 06:59:55,812 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68d1f820-b3bd-44ff-981c-6d5644e6ec24/bin/utaipan-gh47qXpMRh/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2022-12-14 06:59:55,834 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-14 06:59:55,834 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-14 06:59:55,835 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-14 06:59:55,835 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-14 06:59:55,835 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-14 06:59:55,836 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-14 06:59:55,836 INFO L138 SettingsManager]: * User list type=DISABLED [2022-12-14 06:59:55,836 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-12-14 06:59:55,836 INFO L138 SettingsManager]: * Explicit value domain=true [2022-12-14 06:59:55,836 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-12-14 06:59:55,837 INFO L138 SettingsManager]: * Octagon Domain=false [2022-12-14 06:59:55,837 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-12-14 06:59:55,837 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-12-14 06:59:55,837 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-12-14 06:59:55,837 INFO L138 SettingsManager]: * Interval Domain=false [2022-12-14 06:59:55,838 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-12-14 06:59:55,838 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-12-14 06:59:55,838 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-12-14 06:59:55,839 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-12-14 06:59:55,839 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-12-14 06:59:55,839 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-14 06:59:55,839 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-14 06:59:55,839 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-12-14 06:59:55,840 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-14 06:59:55,840 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-14 06:59:55,840 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-14 06:59:55,840 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-12-14 06:59:55,840 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-12-14 06:59:55,840 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-12-14 06:59:55,841 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-14 06:59:55,841 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-12-14 06:59:55,841 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-14 06:59:55,841 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-14 06:59:55,841 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-14 06:59:55,842 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-14 06:59:55,842 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 06:59:55,842 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-14 06:59:55,842 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-12-14 06:59:55,842 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-14 06:59:55,842 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-12-14 06:59:55,843 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-14 06:59:55,843 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-12-14 06:59:55,843 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_68d1f820-b3bd-44ff-981c-6d5644e6ec24/bin/utaipan-gh47qXpMRh/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68d1f820-b3bd-44ff-981c-6d5644e6ec24/bin/utaipan-gh47qXpMRh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4cd641fa41c29ed0240eed782d3555502472fe8bb63d504547076d8eeefa2c0d [2022-12-14 06:59:56,044 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-14 06:59:56,062 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-14 06:59:56,064 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-14 06:59:56,065 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-14 06:59:56,065 INFO L275 PluginConnector]: CDTParser initialized [2022-12-14 06:59:56,066 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68d1f820-b3bd-44ff-981c-6d5644e6ec24/bin/utaipan-gh47qXpMRh/../../sv-benchmarks/c/verifythis/prefixsum_iter.c [2022-12-14 06:59:58,715 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-14 06:59:58,871 INFO L351 CDTParser]: Found 1 translation units. [2022-12-14 06:59:58,872 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68d1f820-b3bd-44ff-981c-6d5644e6ec24/sv-benchmarks/c/verifythis/prefixsum_iter.c [2022-12-14 06:59:58,876 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68d1f820-b3bd-44ff-981c-6d5644e6ec24/bin/utaipan-gh47qXpMRh/data/bd499ced1/815427949dfd4cd4a41da744ab81d35d/FLAG7e98652e2 [2022-12-14 06:59:59,290 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68d1f820-b3bd-44ff-981c-6d5644e6ec24/bin/utaipan-gh47qXpMRh/data/bd499ced1/815427949dfd4cd4a41da744ab81d35d [2022-12-14 06:59:59,293 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-14 06:59:59,294 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-14 06:59:59,295 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-14 06:59:59,295 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-14 06:59:59,297 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-14 06:59:59,298 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 06:59:59" (1/1) ... [2022-12-14 06:59:59,299 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5537a9fd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:59:59, skipping insertion in model container [2022-12-14 06:59:59,299 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 06:59:59" (1/1) ... [2022-12-14 06:59:59,306 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-14 06:59:59,322 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-14 06:59:59,438 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68d1f820-b3bd-44ff-981c-6d5644e6ec24/sv-benchmarks/c/verifythis/prefixsum_iter.c[526,539] [2022-12-14 06:59:59,461 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 06:59:59,472 INFO L203 MainTranslator]: Completed pre-run [2022-12-14 06:59:59,480 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68d1f820-b3bd-44ff-981c-6d5644e6ec24/sv-benchmarks/c/verifythis/prefixsum_iter.c[526,539] [2022-12-14 06:59:59,489 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 06:59:59,500 INFO L208 MainTranslator]: Completed translation [2022-12-14 06:59:59,501 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:59:59 WrapperNode [2022-12-14 06:59:59,501 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-14 06:59:59,501 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-14 06:59:59,501 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-14 06:59:59,502 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-14 06:59:59,506 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:59:59" (1/1) ... [2022-12-14 06:59:59,513 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:59:59" (1/1) ... [2022-12-14 06:59:59,534 INFO L138 Inliner]: procedures = 22, calls = 33, calls flagged for inlining = 7, calls inlined = 7, statements flattened = 131 [2022-12-14 06:59:59,535 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-14 06:59:59,536 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-14 06:59:59,536 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-14 06:59:59,536 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-14 06:59:59,545 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:59:59" (1/1) ... [2022-12-14 06:59:59,545 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:59:59" (1/1) ... [2022-12-14 06:59:59,548 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:59:59" (1/1) ... [2022-12-14 06:59:59,549 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:59:59" (1/1) ... [2022-12-14 06:59:59,556 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:59:59" (1/1) ... [2022-12-14 06:59:59,560 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:59:59" (1/1) ... [2022-12-14 06:59:59,562 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:59:59" (1/1) ... [2022-12-14 06:59:59,563 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:59:59" (1/1) ... [2022-12-14 06:59:59,566 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-14 06:59:59,567 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-14 06:59:59,567 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-14 06:59:59,567 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-14 06:59:59,568 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:59:59" (1/1) ... [2022-12-14 06:59:59,574 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 06:59:59,583 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68d1f820-b3bd-44ff-981c-6d5644e6ec24/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 06:59:59,593 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68d1f820-b3bd-44ff-981c-6d5644e6ec24/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-14 06:59:59,595 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68d1f820-b3bd-44ff-981c-6d5644e6ec24/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-14 06:59:59,621 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-14 06:59:59,621 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-12-14 06:59:59,621 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-12-14 06:59:59,621 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-14 06:59:59,622 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-12-14 06:59:59,622 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-12-14 06:59:59,622 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-14 06:59:59,622 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-14 06:59:59,622 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-12-14 06:59:59,622 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.meminit [2022-12-14 06:59:59,622 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.meminit [2022-12-14 06:59:59,622 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-12-14 06:59:59,689 INFO L235 CfgBuilder]: Building ICFG [2022-12-14 06:59:59,691 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-14 06:59:59,958 INFO L276 CfgBuilder]: Performing block encoding [2022-12-14 07:00:00,003 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-14 07:00:00,003 INFO L300 CfgBuilder]: Removed 7 assume(true) statements. [2022-12-14 07:00:00,005 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 07:00:00 BoogieIcfgContainer [2022-12-14 07:00:00,005 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-14 07:00:00,007 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-14 07:00:00,007 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-14 07:00:00,009 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-14 07:00:00,010 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 06:59:59" (1/3) ... [2022-12-14 07:00:00,010 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7409475a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 07:00:00, skipping insertion in model container [2022-12-14 07:00:00,010 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:59:59" (2/3) ... [2022-12-14 07:00:00,010 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7409475a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 07:00:00, skipping insertion in model container [2022-12-14 07:00:00,011 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 07:00:00" (3/3) ... [2022-12-14 07:00:00,012 INFO L112 eAbstractionObserver]: Analyzing ICFG prefixsum_iter.c [2022-12-14 07:00:00,025 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-14 07:00:00,025 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 34 error locations. [2022-12-14 07:00:00,056 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-14 07:00:00,061 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;@71800e3, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-12-14 07:00:00,061 INFO L358 AbstractCegarLoop]: Starting to check reachability of 34 error locations. [2022-12-14 07:00:00,064 INFO L276 IsEmpty]: Start isEmpty. Operand has 78 states, 37 states have (on average 2.135135135135135) internal successors, (79), 71 states have internal predecessors, (79), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-12-14 07:00:00,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-12-14 07:00:00,069 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:00:00,070 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 07:00:00,070 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2022-12-14 07:00:00,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:00:00,074 INFO L85 PathProgramCache]: Analyzing trace with hash 1678948165, now seen corresponding path program 1 times [2022-12-14 07:00:00,080 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 07:00:00,081 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1959500994] [2022-12-14 07:00:00,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:00:00,081 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 07:00:00,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:00:00,425 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-14 07:00:00,425 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 07:00:00,426 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1959500994] [2022-12-14 07:00:00,426 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1959500994] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 07:00:00,426 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 07:00:00,427 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 07:00:00,428 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2098339033] [2022-12-14 07:00:00,429 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 07:00:00,433 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 07:00:00,433 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 07:00:00,461 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 07:00:00,462 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 07:00:00,464 INFO L87 Difference]: Start difference. First operand has 78 states, 37 states have (on average 2.135135135135135) internal successors, (79), 71 states have internal predecessors, (79), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Second operand has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 4 states have internal predecessors, (10), 3 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2022-12-14 07:00:00,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:00:00,564 INFO L93 Difference]: Finished difference Result 76 states and 84 transitions. [2022-12-14 07:00:00,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 07:00:00,566 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 4 states have internal predecessors, (10), 3 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 20 [2022-12-14 07:00:00,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:00:00,573 INFO L225 Difference]: With dead ends: 76 [2022-12-14 07:00:00,574 INFO L226 Difference]: Without dead ends: 75 [2022-12-14 07:00:00,575 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-12-14 07:00:00,578 INFO L413 NwaCegarLoop]: 43 mSDtfsCounter, 116 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 116 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 68 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 07:00:00,579 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [116 Valid, 63 Invalid, 68 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 07:00:00,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2022-12-14 07:00:00,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2022-12-14 07:00:00,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 37 states have (on average 2.027027027027027) internal successors, (75), 68 states have internal predecessors, (75), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-12-14 07:00:00,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 83 transitions. [2022-12-14 07:00:00,613 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 83 transitions. Word has length 20 [2022-12-14 07:00:00,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:00:00,614 INFO L495 AbstractCegarLoop]: Abstraction has 75 states and 83 transitions. [2022-12-14 07:00:00,614 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 4 states have internal predecessors, (10), 3 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2022-12-14 07:00:00,614 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 83 transitions. [2022-12-14 07:00:00,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-12-14 07:00:00,615 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:00:00,615 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 07:00:00,615 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-14 07:00:00,615 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2022-12-14 07:00:00,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:00:00,616 INFO L85 PathProgramCache]: Analyzing trace with hash 1678948166, now seen corresponding path program 1 times [2022-12-14 07:00:00,616 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 07:00:00,616 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1586120770] [2022-12-14 07:00:00,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:00:00,616 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 07:00:00,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:00:01,077 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-14 07:00:01,078 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 07:00:01,078 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1586120770] [2022-12-14 07:00:01,078 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1586120770] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 07:00:01,078 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 07:00:01,078 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-12-14 07:00:01,079 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1096052383] [2022-12-14 07:00:01,079 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 07:00:01,080 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-12-14 07:00:01,080 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 07:00:01,080 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-12-14 07:00:01,081 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2022-12-14 07:00:01,081 INFO L87 Difference]: Start difference. First operand 75 states and 83 transitions. Second operand has 9 states, 8 states have (on average 1.25) internal successors, (10), 9 states have internal predecessors, (10), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-12-14 07:00:01,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:00:01,917 INFO L93 Difference]: Finished difference Result 201 states and 223 transitions. [2022-12-14 07:00:01,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-12-14 07:00:01,918 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 1.25) internal successors, (10), 9 states have internal predecessors, (10), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 20 [2022-12-14 07:00:01,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:00:01,920 INFO L225 Difference]: With dead ends: 201 [2022-12-14 07:00:01,920 INFO L226 Difference]: Without dead ends: 201 [2022-12-14 07:00:01,920 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=96, Invalid=176, Unknown=0, NotChecked=0, Total=272 [2022-12-14 07:00:01,921 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 599 mSDsluCounter, 165 mSDsCounter, 0 mSdLazyCounter, 309 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 602 SdHoareTripleChecker+Valid, 195 SdHoareTripleChecker+Invalid, 320 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 309 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-12-14 07:00:01,922 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [602 Valid, 195 Invalid, 320 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 309 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-12-14 07:00:01,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2022-12-14 07:00:01,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 106. [2022-12-14 07:00:01,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 65 states have (on average 2.1076923076923078) internal successors, (137), 96 states have internal predecessors, (137), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-12-14 07:00:01,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 151 transitions. [2022-12-14 07:00:01,934 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 151 transitions. Word has length 20 [2022-12-14 07:00:01,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:00:01,934 INFO L495 AbstractCegarLoop]: Abstraction has 106 states and 151 transitions. [2022-12-14 07:00:01,935 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 1.25) internal successors, (10), 9 states have internal predecessors, (10), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-12-14 07:00:01,935 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 151 transitions. [2022-12-14 07:00:01,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-12-14 07:00:01,936 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:00:01,936 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 07:00:01,936 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-12-14 07:00:01,936 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2022-12-14 07:00:01,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:00:01,937 INFO L85 PathProgramCache]: Analyzing trace with hash -2124533425, now seen corresponding path program 1 times [2022-12-14 07:00:01,937 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 07:00:01,937 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [756317458] [2022-12-14 07:00:01,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:00:01,937 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 07:00:01,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:00:02,381 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-14 07:00:02,381 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 07:00:02,381 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [756317458] [2022-12-14 07:00:02,382 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [756317458] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 07:00:02,382 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [285608949] [2022-12-14 07:00:02,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:00:02,382 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 07:00:02,382 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68d1f820-b3bd-44ff-981c-6d5644e6ec24/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 07:00:02,383 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68d1f820-b3bd-44ff-981c-6d5644e6ec24/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 07:00:02,385 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68d1f820-b3bd-44ff-981c-6d5644e6ec24/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-14 07:00:02,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:00:02,454 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 24 conjunts are in the unsatisfiable core [2022-12-14 07:00:02,459 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 07:00:02,549 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 10 treesize of output 9 [2022-12-14 07:00:02,555 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-12-14 07:00:02,767 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:00:02,769 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-12-14 07:00:02,779 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-12-14 07:00:02,780 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-12-14 07:00:03,055 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-14 07:00:03,055 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 07:00:04,355 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [285608949] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 07:00:04,355 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1832736398] [2022-12-14 07:00:04,370 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2022-12-14 07:00:04,371 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 07:00:04,374 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 07:00:04,378 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 07:00:04,378 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 07:00:04,672 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 10 treesize of output 9 [2022-12-14 07:00:04,677 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-12-14 07:00:04,725 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 6 [2022-12-14 07:00:04,811 INFO L321 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2022-12-14 07:00:04,812 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 127 treesize of output 127 [2022-12-14 07:00:04,835 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-12-14 07:00:04,836 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 128 treesize of output 130 [2022-12-14 07:00:04,926 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 6 treesize of output 4 [2022-12-14 07:00:04,937 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-12-14 07:00:05,068 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 6 treesize of output 4 [2022-12-14 07:00:05,079 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-12-14 07:00:05,343 INFO L197 IcfgInterpreter]: Interpreting procedure #Ultimate.meminit with input of size 70 for LOIs [2022-12-14 07:00:05,373 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 8 for LOIs [2022-12-14 07:00:05,375 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 07:00:07,669 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '675#(and (<= |ULTIMATE.start_main_~n~0#1| 2147483647) (= ((as const (Array Int Int)) 0) (select |#memory_int| |ULTIMATE.start_main_#t~malloc16#1.base|)) (not (<= (+ |ULTIMATE.start_main_~a~0#1.offset| (* |ULTIMATE.start_main_~i~1#1| 4) 4) (select |#length| |ULTIMATE.start_main_~a~0#1.base|))) (= |ULTIMATE.start_main_#t~malloc16#1.offset| 0) (<= 0 (+ |ULTIMATE.start_is_pow2_#in~x#1| 2147483648)) (= |ULTIMATE.start_main_~i~1#1| 0) (< |ULTIMATE.start_main_~i~1#1| |ULTIMATE.start_main_~n~0#1|) (= |ULTIMATE.start_main_~a0~0#1.base| |ULTIMATE.start_main_#t~malloc16#1.base|) (= (* (mod |ULTIMATE.start_main_~n~0#1| 1073741824) 4) (select |#length| |ULTIMATE.start_main_#t~malloc15#1.base|)) (= (select |#valid| |ULTIMATE.start_main_#t~malloc16#1.base|) 1) (< |ULTIMATE.start_main_#t~malloc15#1.base| |#StackHeapBarrier|) (= |ULTIMATE.start_main_~a~0#1.base| |ULTIMATE.start_main_#t~malloc15#1.base|) (= |ULTIMATE.start_main_~a0~0#1.offset| |ULTIMATE.start_main_#t~malloc16#1.offset|) (= |ULTIMATE.start_main_~a~0#1.offset| |ULTIMATE.start_main_#t~malloc15#1.offset|) (< |ULTIMATE.start_main_#t~malloc16#1.base| |#StackHeapBarrier|) (not (= |ULTIMATE.start_is_pow2_#res#1| 0)) (= |#NULL.offset| 0) (<= |ULTIMATE.start_is_pow2_#in~x#1| 2147483647) (= (select |#valid| |ULTIMATE.start_main_#t~malloc15#1.base|) 1) (not (= |ULTIMATE.start_main_#t~malloc16#1.base| 0)) (= (* (mod |ULTIMATE.start_main_~n~0#1| 1073741824) 4) (select |#length| |ULTIMATE.start_main_#t~malloc16#1.base|)) (<= 0 |ULTIMATE.start_main_#t~malloc15#1.offset|) (= (ite (= (mod |ULTIMATE.start_is_pow2_~x#1| 4294967296) 1) 1 0) |ULTIMATE.start_is_pow2_#res#1|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~a~0#1.offset| 0) (not (= |ULTIMATE.start_main_#t~malloc15#1.base| 0)) (not (= |ULTIMATE.start_main_#t~malloc16#1.base| |ULTIMATE.start_main_#t~malloc15#1.base|)) (= |#NULL.base| 0))' at error location [2022-12-14 07:00:07,669 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 07:00:07,669 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-14 07:00:07,669 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 16 [2022-12-14 07:00:07,669 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1179721827] [2022-12-14 07:00:07,669 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-14 07:00:07,670 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-12-14 07:00:07,670 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 07:00:07,670 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-12-14 07:00:07,670 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=169, Invalid=1162, Unknown=1, NotChecked=0, Total=1332 [2022-12-14 07:00:07,671 INFO L87 Difference]: Start difference. First operand 106 states and 151 transitions. Second operand has 17 states, 15 states have (on average 1.4666666666666666) internal successors, (22), 17 states have internal predecessors, (22), 7 states have call successors, (7), 3 states have call predecessors, (7), 4 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) [2022-12-14 07:00:08,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:00:08,987 INFO L93 Difference]: Finished difference Result 205 states and 227 transitions. [2022-12-14 07:00:08,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-12-14 07:00:08,988 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 15 states have (on average 1.4666666666666666) internal successors, (22), 17 states have internal predecessors, (22), 7 states have call successors, (7), 3 states have call predecessors, (7), 4 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) Word has length 21 [2022-12-14 07:00:08,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:00:08,989 INFO L225 Difference]: With dead ends: 205 [2022-12-14 07:00:08,989 INFO L226 Difference]: Without dead ends: 205 [2022-12-14 07:00:08,990 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 691 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=340, Invalid=2209, Unknown=1, NotChecked=0, Total=2550 [2022-12-14 07:00:08,991 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 1036 mSDsluCounter, 255 mSDsCounter, 0 mSdLazyCounter, 1051 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1037 SdHoareTripleChecker+Valid, 296 SdHoareTripleChecker+Invalid, 1089 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 1051 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-12-14 07:00:08,992 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1037 Valid, 296 Invalid, 1089 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 1051 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-12-14 07:00:08,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2022-12-14 07:00:08,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 84. [2022-12-14 07:00:08,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 44 states have (on average 1.8863636363636365) internal successors, (83), 74 states have internal predecessors, (83), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-12-14 07:00:08,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 97 transitions. [2022-12-14 07:00:08,999 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 97 transitions. Word has length 21 [2022-12-14 07:00:08,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:00:09,000 INFO L495 AbstractCegarLoop]: Abstraction has 84 states and 97 transitions. [2022-12-14 07:00:09,000 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 15 states have (on average 1.4666666666666666) internal successors, (22), 17 states have internal predecessors, (22), 7 states have call successors, (7), 3 states have call predecessors, (7), 4 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) [2022-12-14 07:00:09,000 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 97 transitions. [2022-12-14 07:00:09,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-12-14 07:00:09,001 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:00:09,001 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 07:00:09,006 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68d1f820-b3bd-44ff-981c-6d5644e6ec24/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-12-14 07:00:09,201 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68d1f820-b3bd-44ff-981c-6d5644e6ec24/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 07:00:09,203 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2022-12-14 07:00:09,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:00:09,204 INFO L85 PathProgramCache]: Analyzing trace with hash 507785570, now seen corresponding path program 1 times [2022-12-14 07:00:09,205 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 07:00:09,205 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [559558768] [2022-12-14 07:00:09,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:00:09,206 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 07:00:09,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:00:09,290 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-14 07:00:09,290 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 07:00:09,290 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [559558768] [2022-12-14 07:00:09,290 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [559558768] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 07:00:09,290 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 07:00:09,290 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 07:00:09,291 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2029260344] [2022-12-14 07:00:09,291 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 07:00:09,291 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 07:00:09,291 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 07:00:09,292 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 07:00:09,292 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 07:00:09,292 INFO L87 Difference]: Start difference. First operand 84 states and 97 transitions. Second operand has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-12-14 07:00:09,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:00:09,345 INFO L93 Difference]: Finished difference Result 83 states and 96 transitions. [2022-12-14 07:00:09,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 07:00:09,345 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 21 [2022-12-14 07:00:09,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:00:09,346 INFO L225 Difference]: With dead ends: 83 [2022-12-14 07:00:09,346 INFO L226 Difference]: Without dead ends: 83 [2022-12-14 07:00:09,346 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-12-14 07:00:09,347 INFO L413 NwaCegarLoop]: 44 mSDtfsCounter, 111 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 61 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 07:00:09,348 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [111 Valid, 66 Invalid, 61 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 07:00:09,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2022-12-14 07:00:09,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 83. [2022-12-14 07:00:09,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 44 states have (on average 1.8636363636363635) internal successors, (82), 73 states have internal predecessors, (82), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-12-14 07:00:09,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 96 transitions. [2022-12-14 07:00:09,354 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 96 transitions. Word has length 21 [2022-12-14 07:00:09,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:00:09,355 INFO L495 AbstractCegarLoop]: Abstraction has 83 states and 96 transitions. [2022-12-14 07:00:09,355 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-12-14 07:00:09,355 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 96 transitions. [2022-12-14 07:00:09,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-12-14 07:00:09,356 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:00:09,356 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 07:00:09,356 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-12-14 07:00:09,356 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2022-12-14 07:00:09,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:00:09,357 INFO L85 PathProgramCache]: Analyzing trace with hash 507785571, now seen corresponding path program 1 times [2022-12-14 07:00:09,357 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 07:00:09,357 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1173304506] [2022-12-14 07:00:09,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:00:09,357 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 07:00:09,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:00:09,542 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-14 07:00:09,542 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 07:00:09,542 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1173304506] [2022-12-14 07:00:09,542 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1173304506] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 07:00:09,542 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 07:00:09,542 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-12-14 07:00:09,542 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [840654121] [2022-12-14 07:00:09,543 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 07:00:09,543 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-14 07:00:09,543 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 07:00:09,543 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-14 07:00:09,544 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-12-14 07:00:09,544 INFO L87 Difference]: Start difference. First operand 83 states and 96 transitions. Second operand has 7 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 7 states have internal predecessors, (11), 3 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2022-12-14 07:00:09,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:00:09,918 INFO L93 Difference]: Finished difference Result 137 states and 154 transitions. [2022-12-14 07:00:09,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-14 07:00:09,918 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 7 states have internal predecessors, (11), 3 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 21 [2022-12-14 07:00:09,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:00:09,919 INFO L225 Difference]: With dead ends: 137 [2022-12-14 07:00:09,919 INFO L226 Difference]: Without dead ends: 137 [2022-12-14 07:00:09,920 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2022-12-14 07:00:09,920 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 297 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 279 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 297 SdHoareTripleChecker+Valid, 77 SdHoareTripleChecker+Invalid, 282 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 279 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 07:00:09,920 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [297 Valid, 77 Invalid, 282 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 279 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 07:00:09,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2022-12-14 07:00:09,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 106. [2022-12-14 07:00:09,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 67 states have (on average 2.0) internal successors, (134), 96 states have internal predecessors, (134), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-12-14 07:00:09,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 148 transitions. [2022-12-14 07:00:09,925 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 148 transitions. Word has length 21 [2022-12-14 07:00:09,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:00:09,925 INFO L495 AbstractCegarLoop]: Abstraction has 106 states and 148 transitions. [2022-12-14 07:00:09,926 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 7 states have internal predecessors, (11), 3 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2022-12-14 07:00:09,926 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 148 transitions. [2022-12-14 07:00:09,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-12-14 07:00:09,926 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:00:09,926 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 07:00:09,926 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-12-14 07:00:09,926 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2022-12-14 07:00:09,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:00:09,927 INFO L85 PathProgramCache]: Analyzing trace with hash 507963371, now seen corresponding path program 1 times [2022-12-14 07:00:09,927 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 07:00:09,927 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [23219602] [2022-12-14 07:00:09,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:00:09,927 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 07:00:09,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:00:09,991 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-14 07:00:09,991 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 07:00:09,992 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [23219602] [2022-12-14 07:00:09,992 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [23219602] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 07:00:09,992 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 07:00:09,992 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 07:00:09,992 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1387002587] [2022-12-14 07:00:09,992 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 07:00:09,992 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 07:00:09,992 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 07:00:09,993 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 07:00:09,993 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-14 07:00:09,993 INFO L87 Difference]: Start difference. First operand 106 states and 148 transitions. Second operand has 5 states, 4 states have (on average 2.75) internal successors, (11), 5 states have internal predecessors, (11), 3 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2022-12-14 07:00:10,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:00:10,070 INFO L93 Difference]: Finished difference Result 100 states and 136 transitions. [2022-12-14 07:00:10,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 07:00:10,070 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.75) internal successors, (11), 5 states have internal predecessors, (11), 3 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 21 [2022-12-14 07:00:10,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:00:10,071 INFO L225 Difference]: With dead ends: 100 [2022-12-14 07:00:10,072 INFO L226 Difference]: Without dead ends: 100 [2022-12-14 07:00:10,072 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-12-14 07:00:10,073 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 131 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 131 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 93 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 86 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 07:00:10,073 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [131 Valid, 74 Invalid, 93 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 86 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 07:00:10,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2022-12-14 07:00:10,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 100. [2022-12-14 07:00:10,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 67 states have (on average 1.8208955223880596) internal successors, (122), 90 states have internal predecessors, (122), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-12-14 07:00:10,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 136 transitions. [2022-12-14 07:00:10,078 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 136 transitions. Word has length 21 [2022-12-14 07:00:10,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:00:10,078 INFO L495 AbstractCegarLoop]: Abstraction has 100 states and 136 transitions. [2022-12-14 07:00:10,079 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.75) internal successors, (11), 5 states have internal predecessors, (11), 3 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2022-12-14 07:00:10,079 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 136 transitions. [2022-12-14 07:00:10,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-12-14 07:00:10,079 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:00:10,079 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 07:00:10,079 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-12-14 07:00:10,079 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2022-12-14 07:00:10,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:00:10,080 INFO L85 PathProgramCache]: Analyzing trace with hash 507963372, now seen corresponding path program 1 times [2022-12-14 07:00:10,080 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 07:00:10,080 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [258612135] [2022-12-14 07:00:10,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:00:10,080 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 07:00:10,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:00:10,175 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-14 07:00:10,175 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 07:00:10,175 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [258612135] [2022-12-14 07:00:10,175 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [258612135] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 07:00:10,175 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 07:00:10,175 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-12-14 07:00:10,175 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1380421352] [2022-12-14 07:00:10,176 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 07:00:10,176 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-12-14 07:00:10,176 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 07:00:10,176 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-12-14 07:00:10,177 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2022-12-14 07:00:10,177 INFO L87 Difference]: Start difference. First operand 100 states and 136 transitions. Second operand has 8 states, 6 states have (on average 2.0) internal successors, (12), 8 states have internal predecessors, (12), 3 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) [2022-12-14 07:00:10,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:00:10,298 INFO L93 Difference]: Finished difference Result 133 states and 150 transitions. [2022-12-14 07:00:10,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-14 07:00:10,299 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 6 states have (on average 2.0) internal successors, (12), 8 states have internal predecessors, (12), 3 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) Word has length 21 [2022-12-14 07:00:10,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:00:10,300 INFO L225 Difference]: With dead ends: 133 [2022-12-14 07:00:10,300 INFO L226 Difference]: Without dead ends: 133 [2022-12-14 07:00:10,300 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2022-12-14 07:00:10,300 INFO L413 NwaCegarLoop]: 51 mSDtfsCounter, 312 mSDsluCounter, 175 mSDsCounter, 0 mSdLazyCounter, 142 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 315 SdHoareTripleChecker+Valid, 226 SdHoareTripleChecker+Invalid, 151 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 142 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 07:00:10,301 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [315 Valid, 226 Invalid, 151 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 142 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 07:00:10,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2022-12-14 07:00:10,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 70. [2022-12-14 07:00:10,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 40 states have (on average 1.75) internal successors, (70), 63 states have internal predecessors, (70), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-12-14 07:00:10,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 78 transitions. [2022-12-14 07:00:10,304 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 78 transitions. Word has length 21 [2022-12-14 07:00:10,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:00:10,305 INFO L495 AbstractCegarLoop]: Abstraction has 70 states and 78 transitions. [2022-12-14 07:00:10,305 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 6 states have (on average 2.0) internal successors, (12), 8 states have internal predecessors, (12), 3 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) [2022-12-14 07:00:10,305 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 78 transitions. [2022-12-14 07:00:10,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-12-14 07:00:10,305 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:00:10,306 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 07:00:10,306 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-12-14 07:00:10,306 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2022-12-14 07:00:10,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:00:10,306 INFO L85 PathProgramCache]: Analyzing trace with hash -1644176467, now seen corresponding path program 1 times [2022-12-14 07:00:10,306 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 07:00:10,307 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [233212359] [2022-12-14 07:00:10,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:00:10,307 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 07:00:10,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:00:10,431 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-14 07:00:10,431 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 07:00:10,431 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [233212359] [2022-12-14 07:00:10,431 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [233212359] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 07:00:10,431 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1265951000] [2022-12-14 07:00:10,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:00:10,431 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 07:00:10,432 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68d1f820-b3bd-44ff-981c-6d5644e6ec24/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 07:00:10,432 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68d1f820-b3bd-44ff-981c-6d5644e6ec24/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 07:00:10,433 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68d1f820-b3bd-44ff-981c-6d5644e6ec24/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-12-14 07:00:10,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:00:10,504 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 21 conjunts are in the unsatisfiable core [2022-12-14 07:00:10,506 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 07:00:10,683 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-14 07:00:10,683 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 07:00:10,683 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1265951000] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 07:00:10,683 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 07:00:10,683 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [9] total 15 [2022-12-14 07:00:10,683 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [741489274] [2022-12-14 07:00:10,683 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 07:00:10,684 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-12-14 07:00:10,684 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 07:00:10,684 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-12-14 07:00:10,684 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2022-12-14 07:00:10,684 INFO L87 Difference]: Start difference. First operand 70 states and 78 transitions. Second operand has 9 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 8 states have internal predecessors, (13), 3 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) [2022-12-14 07:00:10,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:00:10,835 INFO L93 Difference]: Finished difference Result 129 states and 145 transitions. [2022-12-14 07:00:10,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-12-14 07:00:10,836 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 8 states have internal predecessors, (13), 3 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) Word has length 23 [2022-12-14 07:00:10,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:00:10,836 INFO L225 Difference]: With dead ends: 129 [2022-12-14 07:00:10,836 INFO L226 Difference]: Without dead ends: 129 [2022-12-14 07:00:10,837 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=109, Invalid=271, Unknown=0, NotChecked=0, Total=380 [2022-12-14 07:00:10,838 INFO L413 NwaCegarLoop]: 51 mSDtfsCounter, 283 mSDsluCounter, 178 mSDsCounter, 0 mSdLazyCounter, 153 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 286 SdHoareTripleChecker+Valid, 229 SdHoareTripleChecker+Invalid, 160 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 153 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 07:00:10,838 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [286 Valid, 229 Invalid, 160 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 153 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 07:00:10,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2022-12-14 07:00:10,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 81. [2022-12-14 07:00:10,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 48 states have (on average 1.6458333333333333) internal successors, (79), 71 states have internal predecessors, (79), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-12-14 07:00:10,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 93 transitions. [2022-12-14 07:00:10,841 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 93 transitions. Word has length 23 [2022-12-14 07:00:10,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:00:10,841 INFO L495 AbstractCegarLoop]: Abstraction has 81 states and 93 transitions. [2022-12-14 07:00:10,841 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 8 states have internal predecessors, (13), 3 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) [2022-12-14 07:00:10,841 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 93 transitions. [2022-12-14 07:00:10,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-12-14 07:00:10,842 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:00:10,842 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 07:00:10,847 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68d1f820-b3bd-44ff-981c-6d5644e6ec24/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-12-14 07:00:11,042 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68d1f820-b3bd-44ff-981c-6d5644e6ec24/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2022-12-14 07:00:11,044 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2022-12-14 07:00:11,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:00:11,045 INFO L85 PathProgramCache]: Analyzing trace with hash -1337050876, now seen corresponding path program 1 times [2022-12-14 07:00:11,046 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 07:00:11,046 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1334637876] [2022-12-14 07:00:11,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:00:11,047 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 07:00:11,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:00:11,444 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-14 07:00:11,445 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 07:00:11,445 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1334637876] [2022-12-14 07:00:11,445 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1334637876] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 07:00:11,445 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [308888681] [2022-12-14 07:00:11,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:00:11,445 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 07:00:11,445 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68d1f820-b3bd-44ff-981c-6d5644e6ec24/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 07:00:11,446 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68d1f820-b3bd-44ff-981c-6d5644e6ec24/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 07:00:11,447 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68d1f820-b3bd-44ff-981c-6d5644e6ec24/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-12-14 07:00:11,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:00:11,548 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 29 conjunts are in the unsatisfiable core [2022-12-14 07:00:11,550 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 07:00:11,588 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 10 treesize of output 9 [2022-12-14 07:00:11,595 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-12-14 07:00:11,724 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-12-14 07:00:11,724 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 22 [2022-12-14 07:00:11,734 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-12-14 07:00:11,735 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-12-14 07:00:12,084 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-14 07:00:12,084 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 07:00:13,698 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [308888681] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 07:00:13,698 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [146994163] [2022-12-14 07:00:13,700 INFO L159 IcfgInterpreter]: Started Sifa with 18 locations of interest [2022-12-14 07:00:13,701 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 07:00:13,701 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 07:00:13,701 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 07:00:13,701 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 07:00:13,956 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 10 treesize of output 9 [2022-12-14 07:00:13,969 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-12-14 07:00:14,006 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 6 [2022-12-14 07:00:14,075 INFO L321 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2022-12-14 07:00:14,075 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 127 treesize of output 127 [2022-12-14 07:00:14,092 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-12-14 07:00:14,092 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 128 treesize of output 130 [2022-12-14 07:00:14,167 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 6 treesize of output 4 [2022-12-14 07:00:14,177 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-12-14 07:00:14,281 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 6 treesize of output 4 [2022-12-14 07:00:14,289 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-12-14 07:00:14,433 INFO L321 Elim1Store]: treesize reduction 28, result has 15.2 percent of original size [2022-12-14 07:00:14,433 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 200 treesize of output 196 [2022-12-14 07:00:14,502 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:00:14,512 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 07:00:14,513 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 07:00:14,537 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:00:14,546 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 07:00:14,547 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 25 treesize of output 25 [2022-12-14 07:00:14,660 INFO L197 IcfgInterpreter]: Interpreting procedure #Ultimate.meminit with input of size 70 for LOIs [2022-12-14 07:00:14,684 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 8 for LOIs [2022-12-14 07:00:14,685 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 07:00:18,241 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2292#(and (<= |ULTIMATE.start_main_~n~0#1| 2147483647) (<= 0 |ULTIMATE.start_main_~a~0#1.offset|) (<= 0 |ULTIMATE.start_is_pow2_#res#1|) (<= 0 |ULTIMATE.start_main_~i~1#1|) (not (<= (+ |ULTIMATE.start_main_~a~0#1.offset| (* |ULTIMATE.start_main_~i~1#1| 4) 4) (select |#length| |ULTIMATE.start_main_~a~0#1.base|))) (= |ULTIMATE.start_main_#t~malloc16#1.offset| 0) (<= 0 (+ |ULTIMATE.start_is_pow2_#in~x#1| 2147483648)) (<= |ULTIMATE.start_is_pow2_#res#1| 1) (<= 0 |ULTIMATE.start_main_~a0~0#1.offset|) (= |#NULL.offset| 0) (<= |ULTIMATE.start_is_pow2_#in~x#1| 2147483647) (= |ULTIMATE.start_main_#t~malloc15#1.offset| 0) (<= |ULTIMATE.start_main_~a0~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~n~0#1|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~a~0#1.offset| 0) (= |#NULL.base| 0))' at error location [2022-12-14 07:00:18,241 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 07:00:18,241 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-14 07:00:18,241 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 11] total 18 [2022-12-14 07:00:18,241 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1618835788] [2022-12-14 07:00:18,242 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-14 07:00:18,242 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-12-14 07:00:18,242 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 07:00:18,242 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-12-14 07:00:18,242 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=194, Invalid=1525, Unknown=3, NotChecked=0, Total=1722 [2022-12-14 07:00:18,243 INFO L87 Difference]: Start difference. First operand 81 states and 93 transitions. Second operand has 19 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 19 states have internal predecessors, (28), 7 states have call successors, (7), 3 states have call predecessors, (7), 4 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) [2022-12-14 07:00:19,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:00:19,492 INFO L93 Difference]: Finished difference Result 133 states and 149 transitions. [2022-12-14 07:00:19,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-12-14 07:00:19,492 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 19 states have internal predecessors, (28), 7 states have call successors, (7), 3 states have call predecessors, (7), 4 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) Word has length 24 [2022-12-14 07:00:19,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:00:19,493 INFO L225 Difference]: With dead ends: 133 [2022-12-14 07:00:19,493 INFO L226 Difference]: Without dead ends: 133 [2022-12-14 07:00:19,494 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1000 ImplicationChecksByTransitivity, 6.1s TimeCoverageRelationStatistics Valid=419, Invalid=2884, Unknown=3, NotChecked=0, Total=3306 [2022-12-14 07:00:19,494 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 776 mSDsluCounter, 236 mSDsCounter, 0 mSdLazyCounter, 922 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 777 SdHoareTripleChecker+Valid, 276 SdHoareTripleChecker+Invalid, 961 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 922 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-12-14 07:00:19,494 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [777 Valid, 276 Invalid, 961 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 922 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-12-14 07:00:19,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2022-12-14 07:00:19,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 83. [2022-12-14 07:00:19,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 50 states have (on average 1.62) internal successors, (81), 73 states have internal predecessors, (81), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-12-14 07:00:19,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 95 transitions. [2022-12-14 07:00:19,497 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 95 transitions. Word has length 24 [2022-12-14 07:00:19,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:00:19,497 INFO L495 AbstractCegarLoop]: Abstraction has 83 states and 95 transitions. [2022-12-14 07:00:19,497 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 19 states have internal predecessors, (28), 7 states have call successors, (7), 3 states have call predecessors, (7), 4 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) [2022-12-14 07:00:19,497 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 95 transitions. [2022-12-14 07:00:19,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-12-14 07:00:19,497 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:00:19,498 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 07:00:19,503 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68d1f820-b3bd-44ff-981c-6d5644e6ec24/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-12-14 07:00:19,698 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68d1f820-b3bd-44ff-981c-6d5644e6ec24/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2022-12-14 07:00:19,699 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2022-12-14 07:00:19,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:00:19,700 INFO L85 PathProgramCache]: Analyzing trace with hash 570314853, now seen corresponding path program 1 times [2022-12-14 07:00:19,700 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 07:00:19,700 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1801051616] [2022-12-14 07:00:19,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:00:19,701 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 07:00:19,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:00:19,933 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-14 07:00:19,934 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 07:00:19,934 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1801051616] [2022-12-14 07:00:19,934 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1801051616] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 07:00:19,934 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2140317612] [2022-12-14 07:00:19,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:00:19,934 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 07:00:19,934 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68d1f820-b3bd-44ff-981c-6d5644e6ec24/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 07:00:19,935 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68d1f820-b3bd-44ff-981c-6d5644e6ec24/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 07:00:19,936 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68d1f820-b3bd-44ff-981c-6d5644e6ec24/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-12-14 07:00:19,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:00:19,987 INFO L263 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 24 conjunts are in the unsatisfiable core [2022-12-14 07:00:19,989 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 07:00:20,114 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-14 07:00:20,114 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 07:00:20,189 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 25 [2022-12-14 07:00:20,235 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-14 07:00:20,235 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2140317612] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 07:00:20,235 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1229094060] [2022-12-14 07:00:20,238 INFO L159 IcfgInterpreter]: Started Sifa with 20 locations of interest [2022-12-14 07:00:20,238 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 07:00:20,238 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 07:00:20,238 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 07:00:20,238 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 07:00:20,400 INFO L321 Elim1Store]: treesize reduction 54, result has 22.9 percent of original size [2022-12-14 07:00:20,400 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 3 case distinctions, treesize of input 221 treesize of output 223 [2022-12-14 07:00:20,522 INFO L321 Elim1Store]: treesize reduction 66, result has 19.5 percent of original size [2022-12-14 07:00:20,522 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 220 treesize of output 220 [2022-12-14 07:00:20,595 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 6 [2022-12-14 07:00:20,672 INFO L321 Elim1Store]: treesize reduction 66, result has 19.5 percent of original size [2022-12-14 07:00:20,673 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 220 treesize of output 220 [2022-12-14 07:00:20,867 INFO L321 Elim1Store]: treesize reduction 96, result has 17.9 percent of original size [2022-12-14 07:00:20,868 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 253 treesize of output 256 [2022-12-14 07:00:21,021 INFO L321 Elim1Store]: treesize reduction 182, result has 12.5 percent of original size [2022-12-14 07:00:21,021 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 7 disjoint index pairs (out of 15 index pairs), introduced 7 new quantified variables, introduced 14 case distinctions, treesize of input 272 treesize of output 267 [2022-12-14 07:00:21,167 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2022-12-14 07:00:21,187 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-12-14 07:00:21,313 INFO L321 Elim1Store]: treesize reduction 182, result has 12.5 percent of original size [2022-12-14 07:00:21,314 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 7 disjoint index pairs (out of 15 index pairs), introduced 7 new quantified variables, introduced 14 case distinctions, treesize of input 272 treesize of output 267 [2022-12-14 07:00:21,501 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2022-12-14 07:00:21,514 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-12-14 07:00:21,629 INFO L321 Elim1Store]: treesize reduction 28, result has 15.2 percent of original size [2022-12-14 07:00:21,629 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 330 treesize of output 326 [2022-12-14 07:00:21,759 INFO L321 Elim1Store]: treesize reduction 28, result has 15.2 percent of original size [2022-12-14 07:00:21,759 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 330 treesize of output 326 [2022-12-14 07:00:21,915 INFO L321 Elim1Store]: treesize reduction 182, result has 12.5 percent of original size [2022-12-14 07:00:21,915 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 7 disjoint index pairs (out of 15 index pairs), introduced 7 new quantified variables, introduced 14 case distinctions, treesize of input 272 treesize of output 267 [2022-12-14 07:00:22,100 INFO L321 Elim1Store]: treesize reduction 66, result has 19.5 percent of original size [2022-12-14 07:00:22,100 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 220 treesize of output 220 [2022-12-14 07:00:22,199 INFO L197 IcfgInterpreter]: Interpreting procedure #Ultimate.meminit with input of size 25 for LOIs [2022-12-14 07:00:22,204 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 6 [2022-12-14 07:00:22,206 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 8 for LOIs [2022-12-14 07:00:22,207 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 07:00:25,322 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2720#(and (not (< |ULTIMATE.start_main_~i~1#1| |ULTIMATE.start_main_~n~0#1|)) (= |ULTIMATE.start_downsweep_~a#1.offset| |ULTIMATE.start_downsweep_#in~a#1.offset|) (= |ULTIMATE.start_upsweep_#in~a#1.base| |ULTIMATE.start_upsweep_~a#1.base|) (<= 0 |ULTIMATE.start_main_~a~0#1.offset|) (<= 0 |ULTIMATE.start_is_pow2_#res#1|) (= |ULTIMATE.start_upsweep_#in~a#1.offset| |ULTIMATE.start_upsweep_~a#1.offset|) (<= 0 |ULTIMATE.start_main_~i~1#1|) (= |ULTIMATE.start_upsweep_~space~0#1| 1) (= |ULTIMATE.start_main_~a~0#1.offset| |ULTIMATE.start_downsweep_#in~a#1.offset|) (= |ULTIMATE.start_downsweep_#in~space#1| |ULTIMATE.start_downsweep_~space#1|) (<= |ULTIMATE.start_is_pow2_~x#1| 2147483647) (= |ULTIMATE.start_main_#t~malloc16#1.offset| 0) (= |ULTIMATE.start_main_~n~0#1| |ULTIMATE.start_upsweep_#in~n#1|) (<= 0 (+ |ULTIMATE.start_is_pow2_#in~x#1| 2147483648)) (or (not (<= 4 (+ |ULTIMATE.start_downsweep_~a#1.offset| (* |ULTIMATE.start_downsweep_~n#1| 4)))) (not (<= (+ |ULTIMATE.start_downsweep_~a#1.offset| (* |ULTIMATE.start_downsweep_~n#1| 4)) (select |#length| |ULTIMATE.start_downsweep_~a#1.base|)))) (= |ULTIMATE.start_upsweep_~space~0#1| |ULTIMATE.start_upsweep_#res#1|) (= |ULTIMATE.start_upsweep_~n#1| |ULTIMATE.start_upsweep_#in~n#1|) (= |ULTIMATE.start_upsweep_#res#1| |ULTIMATE.start_main_~space~1#1|) (= |ULTIMATE.start_main_~a~0#1.base| |ULTIMATE.start_downsweep_#in~a#1.base|) (<= |ULTIMATE.start_main_~i~1#1| 1) (<= |ULTIMATE.start_is_pow2_#res#1| 1) (= |ULTIMATE.start_upsweep_#in~a#1.base| |ULTIMATE.start_main_~a~0#1.base|) (= |ULTIMATE.start_downsweep_#in~n#1| |ULTIMATE.start_downsweep_~n#1|) (<= 0 |ULTIMATE.start_main_~a0~0#1.offset|) (= |#NULL.offset| 0) (<= |ULTIMATE.start_is_pow2_#in~x#1| 2147483647) (= |ULTIMATE.start_main_#t~malloc15#1.offset| 0) (= |ULTIMATE.start_downsweep_#in~a#1.base| |ULTIMATE.start_downsweep_~a#1.base|) (<= |ULTIMATE.start_main_~a0~0#1.offset| 0) (= |ULTIMATE.start_main_~a~0#1.offset| |ULTIMATE.start_upsweep_#in~a#1.offset|) (<= 0 (+ |ULTIMATE.start_is_pow2_~x#1| 2147483648)) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~a~0#1.offset| 0) (= |ULTIMATE.start_downsweep_#in~space#1| |ULTIMATE.start_main_~space~1#1|) (= |ULTIMATE.start_downsweep_#in~n#1| |ULTIMATE.start_main_~n~0#1|) (= |#NULL.base| 0) (<= 0 (+ |ULTIMATE.start_main_~n~0#1| 2147483648)))' at error location [2022-12-14 07:00:25,322 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 07:00:25,322 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 07:00:25,322 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 24 [2022-12-14 07:00:25,323 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1243866029] [2022-12-14 07:00:25,323 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 07:00:25,323 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-12-14 07:00:25,323 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 07:00:25,324 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-12-14 07:00:25,325 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=289, Invalid=1603, Unknown=0, NotChecked=0, Total=1892 [2022-12-14 07:00:25,325 INFO L87 Difference]: Start difference. First operand 83 states and 95 transitions. Second operand has 25 states, 24 states have (on average 1.3333333333333333) internal successors, (32), 25 states have internal predecessors, (32), 5 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2022-12-14 07:00:25,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:00:25,835 INFO L93 Difference]: Finished difference Result 129 states and 145 transitions. [2022-12-14 07:00:25,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-12-14 07:00:25,836 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 24 states have (on average 1.3333333333333333) internal successors, (32), 25 states have internal predecessors, (32), 5 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) Word has length 24 [2022-12-14 07:00:25,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:00:25,836 INFO L225 Difference]: With dead ends: 129 [2022-12-14 07:00:25,837 INFO L226 Difference]: Without dead ends: 129 [2022-12-14 07:00:25,837 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 37 SyntacticMatches, 2 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1282 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=619, Invalid=3041, Unknown=0, NotChecked=0, Total=3660 [2022-12-14 07:00:25,838 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 1392 mSDsluCounter, 156 mSDsCounter, 0 mSdLazyCounter, 328 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1393 SdHoareTripleChecker+Valid, 189 SdHoareTripleChecker+Invalid, 341 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 328 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 07:00:25,838 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1393 Valid, 189 Invalid, 341 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 328 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 07:00:25,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2022-12-14 07:00:25,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 82. [2022-12-14 07:00:25,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 50 states have (on average 1.6) internal successors, (80), 72 states have internal predecessors, (80), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-12-14 07:00:25,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 94 transitions. [2022-12-14 07:00:25,840 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 94 transitions. Word has length 24 [2022-12-14 07:00:25,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:00:25,840 INFO L495 AbstractCegarLoop]: Abstraction has 82 states and 94 transitions. [2022-12-14 07:00:25,840 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 24 states have (on average 1.3333333333333333) internal successors, (32), 25 states have internal predecessors, (32), 5 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2022-12-14 07:00:25,841 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 94 transitions. [2022-12-14 07:00:25,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-12-14 07:00:25,841 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:00:25,841 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 07:00:25,846 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68d1f820-b3bd-44ff-981c-6d5644e6ec24/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-12-14 07:00:26,041 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68d1f820-b3bd-44ff-981c-6d5644e6ec24/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-12-14 07:00:26,043 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2022-12-14 07:00:26,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:00:26,044 INFO L85 PathProgramCache]: Analyzing trace with hash 1501095781, now seen corresponding path program 1 times [2022-12-14 07:00:26,045 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 07:00:26,045 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [184632208] [2022-12-14 07:00:26,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:00:26,046 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 07:00:26,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:00:26,336 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-12-14 07:00:26,336 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 07:00:26,336 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [184632208] [2022-12-14 07:00:26,336 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [184632208] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 07:00:26,337 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1125089497] [2022-12-14 07:00:26,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:00:26,337 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 07:00:26,337 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68d1f820-b3bd-44ff-981c-6d5644e6ec24/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 07:00:26,338 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68d1f820-b3bd-44ff-981c-6d5644e6ec24/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 07:00:26,338 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68d1f820-b3bd-44ff-981c-6d5644e6ec24/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-12-14 07:00:26,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:00:26,388 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2022-12-14 07:00:26,390 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 07:00:26,393 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 10 treesize of output 9 [2022-12-14 07:00:26,479 INFO L321 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2022-12-14 07:00:26,479 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 20 [2022-12-14 07:00:26,812 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-12-14 07:00:26,812 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 07:00:27,010 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1125089497] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 07:00:27,010 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2035713207] [2022-12-14 07:00:27,012 INFO L159 IcfgInterpreter]: Started Sifa with 18 locations of interest [2022-12-14 07:00:27,012 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 07:00:27,012 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 07:00:27,013 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 07:00:27,013 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 07:00:27,258 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-12-14 07:00:27,263 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 10 treesize of output 9 [2022-12-14 07:00:27,297 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 6 [2022-12-14 07:00:27,392 INFO L321 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2022-12-14 07:00:27,393 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 127 treesize of output 127 [2022-12-14 07:00:27,411 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-12-14 07:00:27,412 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 128 treesize of output 130 [2022-12-14 07:00:27,529 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 6 treesize of output 4 [2022-12-14 07:00:27,539 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-12-14 07:00:27,626 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 6 treesize of output 4 [2022-12-14 07:00:27,636 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-12-14 07:00:27,771 INFO L321 Elim1Store]: treesize reduction 28, result has 15.2 percent of original size [2022-12-14 07:00:27,771 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 200 treesize of output 196 [2022-12-14 07:00:27,851 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:00:27,859 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 07:00:27,860 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 25 treesize of output 25 [2022-12-14 07:00:27,889 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:00:27,899 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 07:00:27,899 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 25 treesize of output 25 [2022-12-14 07:00:28,020 INFO L197 IcfgInterpreter]: Interpreting procedure #Ultimate.meminit with input of size 70 for LOIs [2022-12-14 07:00:28,044 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 8 for LOIs [2022-12-14 07:00:28,045 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 07:00:29,764 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3111#(and (<= |ULTIMATE.start_main_~n~0#1| 2147483647) (not (<= (+ (* |ULTIMATE.start_main_~i~1#1| 4) |ULTIMATE.start_main_~a0~0#1.offset| 4) (select |#length| |ULTIMATE.start_main_~a0~0#1.base|))) (<= (+ |ULTIMATE.start_main_~a~0#1.offset| (* |ULTIMATE.start_main_~i~1#1| 4) 4) (select |#length| |ULTIMATE.start_main_~a~0#1.base|)) (<= 0 |ULTIMATE.start_main_~a~0#1.offset|) (<= 0 |ULTIMATE.start_is_pow2_#res#1|) (= |ULTIMATE.start_main_#t~malloc16#1.offset| 0) (= |ULTIMATE.start_main_#t~mem18#1| (select (select |#memory_int| |ULTIMATE.start_main_~a~0#1.base|) (+ |ULTIMATE.start_main_~a~0#1.offset| (* |ULTIMATE.start_main_~i~1#1| 4)))) (<= 0 (+ |ULTIMATE.start_is_pow2_#in~x#1| 2147483648)) (<= 0 (+ |ULTIMATE.start_main_~a~0#1.offset| (* |ULTIMATE.start_main_~i~1#1| 4))) (<= |ULTIMATE.start_is_pow2_#res#1| 1) (<= 0 |ULTIMATE.start_main_~a0~0#1.offset|) (= |#NULL.offset| 0) (<= |ULTIMATE.start_is_pow2_#in~x#1| 2147483647) (= |ULTIMATE.start_main_#t~malloc15#1.offset| 0) (<= |ULTIMATE.start_main_~a0~0#1.offset| 0) (= (select |#valid| |ULTIMATE.start_main_~a~0#1.base|) 1) (<= 0 |ULTIMATE.start_main_~n~0#1|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~a~0#1.offset| 0) (= |#NULL.base| 0))' at error location [2022-12-14 07:00:29,764 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 07:00:29,764 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-14 07:00:29,764 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2022-12-14 07:00:29,765 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1615088670] [2022-12-14 07:00:29,765 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-14 07:00:29,765 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-12-14 07:00:29,765 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 07:00:29,765 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-12-14 07:00:29,766 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=167, Invalid=1093, Unknown=0, NotChecked=0, Total=1260 [2022-12-14 07:00:29,766 INFO L87 Difference]: Start difference. First operand 82 states and 94 transitions. Second operand has 14 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 14 states have internal predecessors, (25), 5 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2022-12-14 07:00:30,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:00:30,192 INFO L93 Difference]: Finished difference Result 80 states and 92 transitions. [2022-12-14 07:00:30,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-14 07:00:30,193 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 14 states have internal predecessors, (25), 5 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) Word has length 25 [2022-12-14 07:00:30,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:00:30,194 INFO L225 Difference]: With dead ends: 80 [2022-12-14 07:00:30,194 INFO L226 Difference]: Without dead ends: 80 [2022-12-14 07:00:30,195 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 482 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=241, Invalid=1399, Unknown=0, NotChecked=0, Total=1640 [2022-12-14 07:00:30,195 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 292 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 315 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 292 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 321 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 315 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 07:00:30,195 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [292 Valid, 61 Invalid, 321 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 315 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 07:00:30,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2022-12-14 07:00:30,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 80. [2022-12-14 07:00:30,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 50 states have (on average 1.56) internal successors, (78), 70 states have internal predecessors, (78), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-12-14 07:00:30,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 92 transitions. [2022-12-14 07:00:30,198 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 92 transitions. Word has length 25 [2022-12-14 07:00:30,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:00:30,198 INFO L495 AbstractCegarLoop]: Abstraction has 80 states and 92 transitions. [2022-12-14 07:00:30,198 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 14 states have internal predecessors, (25), 5 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2022-12-14 07:00:30,198 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 92 transitions. [2022-12-14 07:00:30,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-12-14 07:00:30,199 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:00:30,199 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 07:00:30,203 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68d1f820-b3bd-44ff-981c-6d5644e6ec24/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-12-14 07:00:30,400 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68d1f820-b3bd-44ff-981c-6d5644e6ec24/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 07:00:30,401 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2022-12-14 07:00:30,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:00:30,401 INFO L85 PathProgramCache]: Analyzing trace with hash 499732046, now seen corresponding path program 1 times [2022-12-14 07:00:30,402 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 07:00:30,402 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1687845448] [2022-12-14 07:00:30,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:00:30,402 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 07:00:30,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:00:30,447 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-14 07:00:30,447 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 07:00:30,447 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1687845448] [2022-12-14 07:00:30,447 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1687845448] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 07:00:30,447 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 07:00:30,447 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 07:00:30,448 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1039648903] [2022-12-14 07:00:30,448 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 07:00:30,448 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 07:00:30,448 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 07:00:30,448 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 07:00:30,448 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 07:00:30,449 INFO L87 Difference]: Start difference. First operand 80 states and 92 transitions. Second operand has 4 states, 3 states have (on average 5.0) internal successors, (15), 4 states have internal predecessors, (15), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-12-14 07:00:30,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:00:30,498 INFO L93 Difference]: Finished difference Result 77 states and 89 transitions. [2022-12-14 07:00:30,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 07:00:30,498 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 5.0) internal successors, (15), 4 states have internal predecessors, (15), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 25 [2022-12-14 07:00:30,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:00:30,499 INFO L225 Difference]: With dead ends: 77 [2022-12-14 07:00:30,499 INFO L226 Difference]: Without dead ends: 77 [2022-12-14 07:00:30,499 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-12-14 07:00:30,499 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 81 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 07:00:30,500 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [81 Valid, 70 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 07:00:30,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2022-12-14 07:00:30,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 77. [2022-12-14 07:00:30,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 50 states have (on average 1.5) internal successors, (75), 67 states have internal predecessors, (75), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-12-14 07:00:30,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 89 transitions. [2022-12-14 07:00:30,502 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 89 transitions. Word has length 25 [2022-12-14 07:00:30,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:00:30,502 INFO L495 AbstractCegarLoop]: Abstraction has 77 states and 89 transitions. [2022-12-14 07:00:30,502 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 5.0) internal successors, (15), 4 states have internal predecessors, (15), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-12-14 07:00:30,502 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 89 transitions. [2022-12-14 07:00:30,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-12-14 07:00:30,503 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:00:30,503 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 07:00:30,503 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-12-14 07:00:30,503 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2022-12-14 07:00:30,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:00:30,503 INFO L85 PathProgramCache]: Analyzing trace with hash 499732047, now seen corresponding path program 1 times [2022-12-14 07:00:30,503 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 07:00:30,504 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [781022044] [2022-12-14 07:00:30,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:00:30,504 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 07:00:30,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:00:30,570 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-14 07:00:30,570 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 07:00:30,570 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [781022044] [2022-12-14 07:00:30,570 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [781022044] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 07:00:30,570 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1432229878] [2022-12-14 07:00:30,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:00:30,570 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 07:00:30,571 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68d1f820-b3bd-44ff-981c-6d5644e6ec24/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 07:00:30,571 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68d1f820-b3bd-44ff-981c-6d5644e6ec24/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 07:00:30,572 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68d1f820-b3bd-44ff-981c-6d5644e6ec24/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-12-14 07:00:30,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:00:30,626 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 7 conjunts are in the unsatisfiable core [2022-12-14 07:00:30,628 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 07:00:30,647 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-14 07:00:30,647 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 07:00:30,670 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-14 07:00:30,670 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1432229878] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 07:00:30,670 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1200570246] [2022-12-14 07:00:30,672 INFO L159 IcfgInterpreter]: Started Sifa with 21 locations of interest [2022-12-14 07:00:30,672 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 07:00:30,672 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 07:00:30,672 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 07:00:30,673 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 07:00:30,828 INFO L321 Elim1Store]: treesize reduction 54, result has 22.9 percent of original size [2022-12-14 07:00:30,828 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 3 case distinctions, treesize of input 221 treesize of output 223 [2022-12-14 07:00:30,904 INFO L321 Elim1Store]: treesize reduction 66, result has 19.5 percent of original size [2022-12-14 07:00:30,904 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 220 treesize of output 220 [2022-12-14 07:00:30,966 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 6 [2022-12-14 07:00:31,048 INFO L321 Elim1Store]: treesize reduction 66, result has 19.5 percent of original size [2022-12-14 07:00:31,048 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 220 treesize of output 220 [2022-12-14 07:00:31,227 INFO L321 Elim1Store]: treesize reduction 96, result has 17.9 percent of original size [2022-12-14 07:00:31,228 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 253 treesize of output 256 [2022-12-14 07:00:31,340 INFO L321 Elim1Store]: treesize reduction 182, result has 12.5 percent of original size [2022-12-14 07:00:31,341 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 7 disjoint index pairs (out of 15 index pairs), introduced 7 new quantified variables, introduced 14 case distinctions, treesize of input 272 treesize of output 267 [2022-12-14 07:00:31,511 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2022-12-14 07:00:31,524 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-12-14 07:00:31,621 INFO L321 Elim1Store]: treesize reduction 182, result has 12.5 percent of original size [2022-12-14 07:00:31,621 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 7 disjoint index pairs (out of 15 index pairs), introduced 7 new quantified variables, introduced 14 case distinctions, treesize of input 272 treesize of output 267 [2022-12-14 07:00:31,793 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2022-12-14 07:00:31,807 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-12-14 07:00:31,964 INFO L321 Elim1Store]: treesize reduction 28, result has 15.2 percent of original size [2022-12-14 07:00:31,964 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 330 treesize of output 326 [2022-12-14 07:00:32,080 INFO L321 Elim1Store]: treesize reduction 38, result has 11.6 percent of original size [2022-12-14 07:00:32,080 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 340 treesize of output 336 [2022-12-14 07:00:32,277 INFO L321 Elim1Store]: treesize reduction 182, result has 12.5 percent of original size [2022-12-14 07:00:32,277 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 7 disjoint index pairs (out of 15 index pairs), introduced 7 new quantified variables, introduced 14 case distinctions, treesize of input 272 treesize of output 267 [2022-12-14 07:00:32,444 INFO L321 Elim1Store]: treesize reduction 66, result has 19.5 percent of original size [2022-12-14 07:00:32,445 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 220 treesize of output 220 [2022-12-14 07:00:32,520 INFO L197 IcfgInterpreter]: Interpreting procedure #Ultimate.meminit with input of size 25 for LOIs [2022-12-14 07:00:32,525 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 6 [2022-12-14 07:00:32,526 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 8 for LOIs [2022-12-14 07:00:32,527 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 07:00:34,761 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [1200570246] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 07:00:34,761 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-12-14 07:00:34,761 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [6, 5, 5] total 26 [2022-12-14 07:00:34,761 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1351807340] [2022-12-14 07:00:34,762 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 07:00:34,762 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-12-14 07:00:34,762 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 07:00:34,762 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-12-14 07:00:34,762 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=542, Unknown=0, NotChecked=0, Total=650 [2022-12-14 07:00:34,762 INFO L87 Difference]: Start difference. First operand 77 states and 89 transitions. Second operand has 19 states, 13 states have (on average 1.1538461538461537) internal successors, (15), 12 states have internal predecessors, (15), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-12-14 07:00:35,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:00:35,579 INFO L93 Difference]: Finished difference Result 115 states and 128 transitions. [2022-12-14 07:00:35,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-12-14 07:00:35,579 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 13 states have (on average 1.1538461538461537) internal successors, (15), 12 states have internal predecessors, (15), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 25 [2022-12-14 07:00:35,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:00:35,580 INFO L225 Difference]: With dead ends: 115 [2022-12-14 07:00:35,580 INFO L226 Difference]: Without dead ends: 115 [2022-12-14 07:00:35,580 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 55 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 175 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=108, Invalid=542, Unknown=0, NotChecked=0, Total=650 [2022-12-14 07:00:35,580 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 105 mSDsluCounter, 187 mSDsCounter, 0 mSdLazyCounter, 640 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 222 SdHoareTripleChecker+Invalid, 643 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 640 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-12-14 07:00:35,580 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [106 Valid, 222 Invalid, 643 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 640 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-12-14 07:00:35,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2022-12-14 07:00:35,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 80. [2022-12-14 07:00:35,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 52 states have (on average 1.4807692307692308) internal successors, (77), 69 states have internal predecessors, (77), 7 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-12-14 07:00:35,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 91 transitions. [2022-12-14 07:00:35,582 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 91 transitions. Word has length 25 [2022-12-14 07:00:35,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:00:35,583 INFO L495 AbstractCegarLoop]: Abstraction has 80 states and 91 transitions. [2022-12-14 07:00:35,583 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 13 states have (on average 1.1538461538461537) internal successors, (15), 12 states have internal predecessors, (15), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-12-14 07:00:35,583 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 91 transitions. [2022-12-14 07:00:35,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-12-14 07:00:35,583 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:00:35,583 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 07:00:35,588 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68d1f820-b3bd-44ff-981c-6d5644e6ec24/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-12-14 07:00:35,784 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68d1f820-b3bd-44ff-981c-6d5644e6ec24/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 07:00:35,785 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2022-12-14 07:00:35,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:00:35,786 INFO L85 PathProgramCache]: Analyzing trace with hash -555804369, now seen corresponding path program 2 times [2022-12-14 07:00:35,786 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 07:00:35,786 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [152033923] [2022-12-14 07:00:35,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:00:35,787 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 07:00:35,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:00:36,150 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-14 07:00:36,150 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 07:00:36,150 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [152033923] [2022-12-14 07:00:36,150 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [152033923] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 07:00:36,150 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [492288246] [2022-12-14 07:00:36,150 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 07:00:36,151 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 07:00:36,151 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68d1f820-b3bd-44ff-981c-6d5644e6ec24/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 07:00:36,151 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68d1f820-b3bd-44ff-981c-6d5644e6ec24/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 07:00:36,152 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68d1f820-b3bd-44ff-981c-6d5644e6ec24/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-12-14 07:00:36,250 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-12-14 07:00:36,250 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 07:00:36,251 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 33 conjunts are in the unsatisfiable core [2022-12-14 07:00:36,253 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 07:00:36,284 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-12-14 07:00:36,289 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 10 treesize of output 9 [2022-12-14 07:00:36,435 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-12-14 07:00:36,435 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 22 [2022-12-14 07:00:36,446 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-12-14 07:00:36,446 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-12-14 07:00:37,610 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-14 07:00:37,611 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 07:00:37,902 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [492288246] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 07:00:37,903 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2002942642] [2022-12-14 07:00:37,904 INFO L159 IcfgInterpreter]: Started Sifa with 18 locations of interest [2022-12-14 07:00:37,904 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 07:00:37,905 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 07:00:37,905 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 07:00:37,905 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 07:00:38,044 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 10 treesize of output 9 [2022-12-14 07:00:38,054 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-12-14 07:00:38,081 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 6 [2022-12-14 07:00:38,152 INFO L321 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2022-12-14 07:00:38,152 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 127 treesize of output 127 [2022-12-14 07:00:38,174 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-12-14 07:00:38,175 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 128 treesize of output 130 [2022-12-14 07:00:38,259 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 6 treesize of output 4 [2022-12-14 07:00:38,269 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-12-14 07:00:38,335 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 6 treesize of output 4 [2022-12-14 07:00:38,345 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-12-14 07:00:38,390 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 30 [2022-12-14 07:00:38,502 INFO L321 Elim1Store]: treesize reduction 84, result has 9.7 percent of original size [2022-12-14 07:00:38,502 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 272 treesize of output 269 [2022-12-14 07:00:38,565 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:00:38,574 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 07:00:38,574 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 25 treesize of output 25 [2022-12-14 07:00:38,592 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:00:38,602 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 07:00:38,602 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 25 treesize of output 25 [2022-12-14 07:00:38,721 INFO L197 IcfgInterpreter]: Interpreting procedure #Ultimate.meminit with input of size 70 for LOIs [2022-12-14 07:00:38,743 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 8 for LOIs [2022-12-14 07:00:38,744 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 07:00:42,054 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3968#(and (<= |ULTIMATE.start_main_~n~0#1| 2147483647) (<= 0 |ULTIMATE.start_main_~a~0#1.offset|) (<= 0 |ULTIMATE.start_is_pow2_#res#1|) (<= 0 |ULTIMATE.start_main_~i~1#1|) (not (<= (+ |ULTIMATE.start_main_~a~0#1.offset| (* |ULTIMATE.start_main_~i~1#1| 4) 4) (select |#length| |ULTIMATE.start_main_~a~0#1.base|))) (= |ULTIMATE.start_main_#t~malloc16#1.offset| 0) (<= 0 (+ |ULTIMATE.start_is_pow2_#in~x#1| 2147483648)) (<= |ULTIMATE.start_is_pow2_#res#1| 1) (<= 0 |ULTIMATE.start_main_~a0~0#1.offset|) (= |#NULL.offset| 0) (<= |ULTIMATE.start_is_pow2_#in~x#1| 2147483647) (= |ULTIMATE.start_main_#t~malloc15#1.offset| 0) (<= |ULTIMATE.start_main_~a0~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~n~0#1|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~a~0#1.offset| 0) (= |#NULL.base| 0))' at error location [2022-12-14 07:00:42,054 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 07:00:42,054 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-14 07:00:42,054 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 18 [2022-12-14 07:00:42,054 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1045230924] [2022-12-14 07:00:42,055 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-14 07:00:42,055 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-12-14 07:00:42,055 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 07:00:42,055 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-12-14 07:00:42,055 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=191, Invalid=1529, Unknown=2, NotChecked=0, Total=1722 [2022-12-14 07:00:42,056 INFO L87 Difference]: Start difference. First operand 80 states and 91 transitions. Second operand has 19 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 19 states have internal predecessors, (33), 7 states have call successors, (7), 3 states have call predecessors, (7), 4 states have return successors, (8), 6 states have call predecessors, (8), 7 states have call successors, (8) [2022-12-14 07:00:44,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:00:44,546 INFO L93 Difference]: Finished difference Result 115 states and 128 transitions. [2022-12-14 07:00:44,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-12-14 07:00:44,546 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 19 states have internal predecessors, (33), 7 states have call successors, (7), 3 states have call predecessors, (7), 4 states have return successors, (8), 6 states have call predecessors, (8), 7 states have call successors, (8) Word has length 27 [2022-12-14 07:00:44,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:00:44,547 INFO L225 Difference]: With dead ends: 115 [2022-12-14 07:00:44,547 INFO L226 Difference]: Without dead ends: 115 [2022-12-14 07:00:44,548 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 34 SyntacticMatches, 2 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 721 ImplicationChecksByTransitivity, 5.9s TimeCoverageRelationStatistics Valid=389, Invalid=2365, Unknown=2, NotChecked=0, Total=2756 [2022-12-14 07:00:44,548 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 410 mSDsluCounter, 152 mSDsCounter, 0 mSdLazyCounter, 610 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 411 SdHoareTripleChecker+Valid, 183 SdHoareTripleChecker+Invalid, 622 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 610 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-12-14 07:00:44,548 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [411 Valid, 183 Invalid, 622 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 610 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-12-14 07:00:44,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2022-12-14 07:00:44,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 78. [2022-12-14 07:00:44,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 51 states have (on average 1.4705882352941178) internal successors, (75), 67 states have internal predecessors, (75), 7 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-12-14 07:00:44,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 89 transitions. [2022-12-14 07:00:44,550 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 89 transitions. Word has length 27 [2022-12-14 07:00:44,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:00:44,550 INFO L495 AbstractCegarLoop]: Abstraction has 78 states and 89 transitions. [2022-12-14 07:00:44,551 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 19 states have internal predecessors, (33), 7 states have call successors, (7), 3 states have call predecessors, (7), 4 states have return successors, (8), 6 states have call predecessors, (8), 7 states have call successors, (8) [2022-12-14 07:00:44,551 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 89 transitions. [2022-12-14 07:00:44,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-12-14 07:00:44,551 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:00:44,552 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 07:00:44,556 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68d1f820-b3bd-44ff-981c-6d5644e6ec24/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-12-14 07:00:44,752 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68d1f820-b3bd-44ff-981c-6d5644e6ec24/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-12-14 07:00:44,753 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr22REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2022-12-14 07:00:44,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:00:44,754 INFO L85 PathProgramCache]: Analyzing trace with hash -636952317, now seen corresponding path program 1 times [2022-12-14 07:00:44,754 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 07:00:44,754 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [900652892] [2022-12-14 07:00:44,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:00:44,755 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 07:00:44,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:00:44,797 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-12-14 07:00:44,797 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 07:00:44,797 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [900652892] [2022-12-14 07:00:44,797 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [900652892] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 07:00:44,797 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 07:00:44,797 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 07:00:44,797 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2120325183] [2022-12-14 07:00:44,798 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 07:00:44,798 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 07:00:44,798 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 07:00:44,798 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 07:00:44,798 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-14 07:00:44,799 INFO L87 Difference]: Start difference. First operand 78 states and 89 transitions. Second operand has 5 states, 4 states have (on average 4.25) internal successors, (17), 5 states have internal predecessors, (17), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-12-14 07:00:44,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:00:44,863 INFO L93 Difference]: Finished difference Result 77 states and 88 transitions. [2022-12-14 07:00:44,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-14 07:00:44,863 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 4.25) internal successors, (17), 5 states have internal predecessors, (17), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 27 [2022-12-14 07:00:44,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:00:44,864 INFO L225 Difference]: With dead ends: 77 [2022-12-14 07:00:44,864 INFO L226 Difference]: Without dead ends: 77 [2022-12-14 07:00:44,865 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-12-14 07:00:44,865 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 90 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 93 SdHoareTripleChecker+Invalid, 88 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 87 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 07:00:44,865 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [90 Valid, 93 Invalid, 88 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 87 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 07:00:44,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2022-12-14 07:00:44,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 77. [2022-12-14 07:00:44,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 51 states have (on average 1.4509803921568627) internal successors, (74), 66 states have internal predecessors, (74), 7 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-12-14 07:00:44,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 88 transitions. [2022-12-14 07:00:44,869 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 88 transitions. Word has length 27 [2022-12-14 07:00:44,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:00:44,869 INFO L495 AbstractCegarLoop]: Abstraction has 77 states and 88 transitions. [2022-12-14 07:00:44,869 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 4.25) internal successors, (17), 5 states have internal predecessors, (17), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-12-14 07:00:44,869 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 88 transitions. [2022-12-14 07:00:44,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-12-14 07:00:44,870 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:00:44,870 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 07:00:44,870 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-12-14 07:00:44,870 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr23REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2022-12-14 07:00:44,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:00:44,871 INFO L85 PathProgramCache]: Analyzing trace with hash -636952316, now seen corresponding path program 1 times [2022-12-14 07:00:44,871 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 07:00:44,871 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1991900205] [2022-12-14 07:00:44,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:00:44,871 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 07:00:44,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:00:45,067 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-14 07:00:45,067 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 07:00:45,067 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1991900205] [2022-12-14 07:00:45,068 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1991900205] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 07:00:45,068 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [249163615] [2022-12-14 07:00:45,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:00:45,068 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 07:00:45,068 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68d1f820-b3bd-44ff-981c-6d5644e6ec24/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 07:00:45,069 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68d1f820-b3bd-44ff-981c-6d5644e6ec24/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 07:00:45,070 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68d1f820-b3bd-44ff-981c-6d5644e6ec24/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-12-14 07:00:45,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:00:45,130 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 19 conjunts are in the unsatisfiable core [2022-12-14 07:00:45,132 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 07:00:45,199 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-14 07:00:45,199 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 07:00:45,235 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 23 treesize of output 19 [2022-12-14 07:00:45,266 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-14 07:00:45,266 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [249163615] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 07:00:45,266 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [841640795] [2022-12-14 07:00:45,268 INFO L159 IcfgInterpreter]: Started Sifa with 23 locations of interest [2022-12-14 07:00:45,268 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 07:00:45,268 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 07:00:45,268 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 07:00:45,269 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 07:00:45,384 INFO L321 Elim1Store]: treesize reduction 54, result has 22.9 percent of original size [2022-12-14 07:00:45,384 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 3 case distinctions, treesize of input 221 treesize of output 223 [2022-12-14 07:00:45,458 INFO L321 Elim1Store]: treesize reduction 66, result has 19.5 percent of original size [2022-12-14 07:00:45,459 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 220 treesize of output 220 [2022-12-14 07:00:45,527 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 6 [2022-12-14 07:00:45,591 INFO L321 Elim1Store]: treesize reduction 66, result has 19.5 percent of original size [2022-12-14 07:00:45,592 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 220 treesize of output 220 [2022-12-14 07:00:45,773 INFO L321 Elim1Store]: treesize reduction 96, result has 17.9 percent of original size [2022-12-14 07:00:45,774 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 253 treesize of output 256 [2022-12-14 07:00:45,902 INFO L321 Elim1Store]: treesize reduction 182, result has 12.5 percent of original size [2022-12-14 07:00:45,902 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 7 disjoint index pairs (out of 15 index pairs), introduced 7 new quantified variables, introduced 14 case distinctions, treesize of input 272 treesize of output 267 [2022-12-14 07:00:46,035 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2022-12-14 07:00:46,047 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-12-14 07:00:46,145 INFO L321 Elim1Store]: treesize reduction 182, result has 12.5 percent of original size [2022-12-14 07:00:46,145 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 7 disjoint index pairs (out of 15 index pairs), introduced 7 new quantified variables, introduced 14 case distinctions, treesize of input 272 treesize of output 267 [2022-12-14 07:00:46,283 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2022-12-14 07:00:46,296 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-12-14 07:00:46,359 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:00:46,359 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 30 [2022-12-14 07:00:46,405 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:00:46,406 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 30 [2022-12-14 07:00:46,587 INFO L321 Elim1Store]: treesize reduction 31, result has 13.9 percent of original size [2022-12-14 07:00:46,587 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 488 treesize of output 484 [2022-12-14 07:00:46,602 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:00:46,603 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 483 treesize of output 475 [2022-12-14 07:00:47,087 INFO L321 Elim1Store]: treesize reduction 182, result has 12.5 percent of original size [2022-12-14 07:00:47,088 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 7 disjoint index pairs (out of 15 index pairs), introduced 7 new quantified variables, introduced 14 case distinctions, treesize of input 272 treesize of output 267 [2022-12-14 07:00:47,240 INFO L321 Elim1Store]: treesize reduction 66, result has 19.5 percent of original size [2022-12-14 07:00:47,240 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 220 treesize of output 220 [2022-12-14 07:00:47,325 INFO L197 IcfgInterpreter]: Interpreting procedure #Ultimate.meminit with input of size 25 for LOIs [2022-12-14 07:00:47,328 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 6 [2022-12-14 07:00:47,330 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 8 for LOIs [2022-12-14 07:00:47,330 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 07:00:54,053 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [841640795] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 07:00:54,053 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-12-14 07:00:54,053 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [10, 6, 6] total 36 [2022-12-14 07:00:54,053 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [194701929] [2022-12-14 07:00:54,053 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 07:00:54,054 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-12-14 07:00:54,054 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 07:00:54,055 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-12-14 07:00:54,055 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=230, Invalid=1102, Unknown=0, NotChecked=0, Total=1332 [2022-12-14 07:00:54,055 INFO L87 Difference]: Start difference. First operand 77 states and 88 transitions. Second operand has 22 states, 15 states have (on average 1.1333333333333333) internal successors, (17), 15 states have internal predecessors, (17), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-12-14 07:00:55,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:00:55,581 INFO L93 Difference]: Finished difference Result 99 states and 111 transitions. [2022-12-14 07:00:55,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-12-14 07:00:55,581 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 15 states have (on average 1.1333333333333333) internal successors, (17), 15 states have internal predecessors, (17), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 27 [2022-12-14 07:00:55,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:00:55,582 INFO L225 Difference]: With dead ends: 99 [2022-12-14 07:00:55,582 INFO L226 Difference]: Without dead ends: 99 [2022-12-14 07:00:55,582 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 51 SyntacticMatches, 4 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 471 ImplicationChecksByTransitivity, 6.8s TimeCoverageRelationStatistics Valid=230, Invalid=1102, Unknown=0, NotChecked=0, Total=1332 [2022-12-14 07:00:55,582 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 85 mSDsluCounter, 129 mSDsCounter, 0 mSdLazyCounter, 820 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 159 SdHoareTripleChecker+Invalid, 828 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 820 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-12-14 07:00:55,583 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [86 Valid, 159 Invalid, 828 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 820 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-12-14 07:00:55,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2022-12-14 07:00:55,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 91. [2022-12-14 07:00:55,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 65 states have (on average 1.4461538461538461) internal successors, (94), 80 states have internal predecessors, (94), 7 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-12-14 07:00:55,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 108 transitions. [2022-12-14 07:00:55,585 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 108 transitions. Word has length 27 [2022-12-14 07:00:55,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:00:55,585 INFO L495 AbstractCegarLoop]: Abstraction has 91 states and 108 transitions. [2022-12-14 07:00:55,585 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 15 states have (on average 1.1333333333333333) internal successors, (17), 15 states have internal predecessors, (17), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-12-14 07:00:55,585 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 108 transitions. [2022-12-14 07:00:55,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-12-14 07:00:55,585 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:00:55,585 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 07:00:55,590 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68d1f820-b3bd-44ff-981c-6d5644e6ec24/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-12-14 07:00:55,786 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68d1f820-b3bd-44ff-981c-6d5644e6ec24/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-12-14 07:00:55,787 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2022-12-14 07:00:55,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:00:55,788 INFO L85 PathProgramCache]: Analyzing trace with hash -1546701999, now seen corresponding path program 1 times [2022-12-14 07:00:55,788 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 07:00:55,789 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1675292293] [2022-12-14 07:00:55,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:00:55,789 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 07:00:55,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:00:55,917 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-12-14 07:00:55,918 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 07:00:55,918 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1675292293] [2022-12-14 07:00:55,918 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1675292293] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 07:00:55,918 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [426024587] [2022-12-14 07:00:55,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:00:55,918 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 07:00:55,918 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68d1f820-b3bd-44ff-981c-6d5644e6ec24/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 07:00:55,919 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68d1f820-b3bd-44ff-981c-6d5644e6ec24/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 07:00:55,920 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68d1f820-b3bd-44ff-981c-6d5644e6ec24/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-12-14 07:00:55,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:00:55,978 INFO L263 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 20 conjunts are in the unsatisfiable core [2022-12-14 07:00:55,979 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 07:00:56,057 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-12-14 07:00:56,058 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 07:00:56,103 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 23 treesize of output 19 [2022-12-14 07:00:56,146 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-12-14 07:00:56,146 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [426024587] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 07:00:56,146 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [104748833] [2022-12-14 07:00:56,148 INFO L159 IcfgInterpreter]: Started Sifa with 21 locations of interest [2022-12-14 07:00:56,148 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 07:00:56,148 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 07:00:56,148 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 07:00:56,148 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 07:00:56,341 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-12-14 07:00:56,345 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 10 treesize of output 9 [2022-12-14 07:00:56,371 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 6 [2022-12-14 07:00:56,438 INFO L321 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2022-12-14 07:00:56,438 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 127 treesize of output 127 [2022-12-14 07:00:56,456 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-12-14 07:00:56,457 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 128 treesize of output 130 [2022-12-14 07:00:56,536 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 6 treesize of output 4 [2022-12-14 07:00:56,544 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-12-14 07:00:56,608 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 6 treesize of output 4 [2022-12-14 07:00:56,616 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-12-14 07:00:56,657 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 30 [2022-12-14 07:00:56,743 INFO L321 Elim1Store]: treesize reduction 84, result has 9.7 percent of original size [2022-12-14 07:00:56,744 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 272 treesize of output 269 [2022-12-14 07:00:56,801 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:00:56,808 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 07:00:56,808 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 25 treesize of output 25 [2022-12-14 07:00:56,827 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:00:56,835 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 07:00:56,835 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 25 treesize of output 25 [2022-12-14 07:00:57,015 INFO L197 IcfgInterpreter]: Interpreting procedure #Ultimate.meminit with input of size 70 for LOIs [2022-12-14 07:00:57,032 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 8 for LOIs [2022-12-14 07:00:57,033 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 07:00:59,677 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [104748833] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 07:00:59,678 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-12-14 07:00:59,678 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [9, 8, 8] total 39 [2022-12-14 07:00:59,678 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [493632808] [2022-12-14 07:00:59,678 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 07:00:59,678 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-12-14 07:00:59,678 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 07:00:59,679 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-12-14 07:00:59,679 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=229, Invalid=1331, Unknown=0, NotChecked=0, Total=1560 [2022-12-14 07:00:59,680 INFO L87 Difference]: Start difference. First operand 91 states and 108 transitions. Second operand has 21 states, 14 states have (on average 1.1428571428571428) internal successors, (16), 14 states have internal predecessors, (16), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-12-14 07:01:02,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:01:02,789 INFO L93 Difference]: Finished difference Result 152 states and 178 transitions. [2022-12-14 07:01:02,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-12-14 07:01:02,789 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 14 states have (on average 1.1428571428571428) internal successors, (16), 14 states have internal predecessors, (16), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 29 [2022-12-14 07:01:02,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:01:02,790 INFO L225 Difference]: With dead ends: 152 [2022-12-14 07:01:02,791 INFO L226 Difference]: Without dead ends: 152 [2022-12-14 07:01:02,792 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 53 SyntacticMatches, 3 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 763 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=446, Invalid=2206, Unknown=0, NotChecked=0, Total=2652 [2022-12-14 07:01:02,792 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 427 mSDsluCounter, 110 mSDsCounter, 0 mSdLazyCounter, 751 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 427 SdHoareTripleChecker+Valid, 125 SdHoareTripleChecker+Invalid, 767 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 751 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-12-14 07:01:02,793 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [427 Valid, 125 Invalid, 767 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 751 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-12-14 07:01:02,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2022-12-14 07:01:02,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 101. [2022-12-14 07:01:02,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 75 states have (on average 1.4533333333333334) internal successors, (109), 90 states have internal predecessors, (109), 7 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-12-14 07:01:02,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 123 transitions. [2022-12-14 07:01:02,797 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 123 transitions. Word has length 29 [2022-12-14 07:01:02,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:01:02,798 INFO L495 AbstractCegarLoop]: Abstraction has 101 states and 123 transitions. [2022-12-14 07:01:02,798 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 14 states have (on average 1.1428571428571428) internal successors, (16), 14 states have internal predecessors, (16), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-12-14 07:01:02,798 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 123 transitions. [2022-12-14 07:01:02,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-12-14 07:01:02,798 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:01:02,798 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 07:01:02,803 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68d1f820-b3bd-44ff-981c-6d5644e6ec24/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2022-12-14 07:01:02,999 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68d1f820-b3bd-44ff-981c-6d5644e6ec24/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-12-14 07:01:03,000 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2022-12-14 07:01:03,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:01:03,001 INFO L85 PathProgramCache]: Analyzing trace with hash 2069213797, now seen corresponding path program 1 times [2022-12-14 07:01:03,001 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 07:01:03,002 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [65982460] [2022-12-14 07:01:03,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:01:03,002 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 07:01:03,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:01:03,280 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-14 07:01:03,280 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 07:01:03,280 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [65982460] [2022-12-14 07:01:03,281 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [65982460] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 07:01:03,281 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [596354042] [2022-12-14 07:01:03,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:01:03,281 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 07:01:03,281 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68d1f820-b3bd-44ff-981c-6d5644e6ec24/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 07:01:03,282 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68d1f820-b3bd-44ff-981c-6d5644e6ec24/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 07:01:03,283 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68d1f820-b3bd-44ff-981c-6d5644e6ec24/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-12-14 07:01:03,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:01:03,339 INFO L263 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 50 conjunts are in the unsatisfiable core [2022-12-14 07:01:03,342 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 07:01:03,368 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-12-14 07:01:03,390 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 6 [2022-12-14 07:01:03,432 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-12-14 07:01:03,432 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-12-14 07:01:03,460 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_240 (Array Int Int))) (= (store |c_old(#memory_int)| |c_#Ultimate.meminit_#ptr.base| v_ArrVal_240) |c_#memory_int|)) is different from true [2022-12-14 07:01:03,463 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 13 treesize of output 15 [2022-12-14 07:01:03,490 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 13 treesize of output 15 [2022-12-14 07:01:03,525 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 23 treesize of output 18 [2022-12-14 07:01:03,566 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 39 treesize of output 33 [2022-12-14 07:01:03,583 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 1 not checked. [2022-12-14 07:01:03,583 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 07:01:23,671 WARN L837 $PredicateComparison]: unable to prove that (forall ((|ULTIMATE.start_downsweep_~n#1| Int) (|ULTIMATE.start_downsweep_~a#1.offset| Int) (|ULTIMATE.start_check_~a#1.offset| Int) (|ULTIMATE.start_check_~i~0#1| Int)) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_downsweep_~a#1.base| (store (select |c_#memory_int| |c_ULTIMATE.start_downsweep_~a#1.base|) (+ |ULTIMATE.start_downsweep_~a#1.offset| (- 4) (* |ULTIMATE.start_downsweep_~n#1| 4)) 0)) |c_ULTIMATE.start_main_~a~0#1.base|) (+ |ULTIMATE.start_check_~a#1.offset| (* |ULTIMATE.start_check_~i~0#1| 4))) 0)) is different from false [2022-12-14 07:01:33,903 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [596354042] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 07:01:33,903 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1940153355] [2022-12-14 07:01:33,905 INFO L159 IcfgInterpreter]: Started Sifa with 25 locations of interest [2022-12-14 07:01:33,905 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 07:01:33,905 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 07:01:33,905 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 07:01:33,905 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 07:01:34,028 INFO L321 Elim1Store]: treesize reduction 54, result has 22.9 percent of original size [2022-12-14 07:01:34,028 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 3 case distinctions, treesize of input 221 treesize of output 223 [2022-12-14 07:01:34,109 INFO L321 Elim1Store]: treesize reduction 66, result has 19.5 percent of original size [2022-12-14 07:01:34,110 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 220 treesize of output 220 [2022-12-14 07:01:34,189 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 6 [2022-12-14 07:01:34,265 INFO L321 Elim1Store]: treesize reduction 66, result has 19.5 percent of original size [2022-12-14 07:01:34,266 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 220 treesize of output 220 [2022-12-14 07:01:34,458 INFO L321 Elim1Store]: treesize reduction 96, result has 17.9 percent of original size [2022-12-14 07:01:34,459 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 253 treesize of output 256 [2022-12-14 07:01:34,578 INFO L321 Elim1Store]: treesize reduction 182, result has 12.5 percent of original size [2022-12-14 07:01:34,578 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 7 disjoint index pairs (out of 15 index pairs), introduced 7 new quantified variables, introduced 14 case distinctions, treesize of input 272 treesize of output 267 [2022-12-14 07:01:34,758 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2022-12-14 07:01:34,771 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-12-14 07:01:34,865 INFO L321 Elim1Store]: treesize reduction 182, result has 12.5 percent of original size [2022-12-14 07:01:34,865 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 7 disjoint index pairs (out of 15 index pairs), introduced 7 new quantified variables, introduced 14 case distinctions, treesize of input 272 treesize of output 267 [2022-12-14 07:01:35,011 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2022-12-14 07:01:35,022 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-12-14 07:01:35,080 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:01:35,081 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 20 [2022-12-14 07:01:35,122 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:01:35,123 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 20 [2022-12-14 07:01:35,300 INFO L321 Elim1Store]: treesize reduction 31, result has 13.9 percent of original size [2022-12-14 07:01:35,301 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 450 treesize of output 446 [2022-12-14 07:01:35,315 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:01:35,315 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 445 treesize of output 442 [2022-12-14 07:01:35,921 INFO L321 Elim1Store]: treesize reduction 182, result has 12.5 percent of original size [2022-12-14 07:01:35,921 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 7 disjoint index pairs (out of 15 index pairs), introduced 7 new quantified variables, introduced 14 case distinctions, treesize of input 272 treesize of output 267 [2022-12-14 07:01:36,075 INFO L321 Elim1Store]: treesize reduction 66, result has 19.5 percent of original size [2022-12-14 07:01:36,076 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 220 treesize of output 220 [2022-12-14 07:01:36,156 INFO L197 IcfgInterpreter]: Interpreting procedure #Ultimate.meminit with input of size 25 for LOIs [2022-12-14 07:01:36,160 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 6 [2022-12-14 07:01:36,161 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 8 for LOIs [2022-12-14 07:01:36,162 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 07:01:43,957 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [1940153355] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 07:01:43,957 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-12-14 07:01:43,957 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [13, 16] total 48 [2022-12-14 07:01:43,957 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [344091224] [2022-12-14 07:01:43,957 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 07:01:43,958 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-12-14 07:01:43,958 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 07:01:43,958 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-12-14 07:01:43,959 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=281, Invalid=2253, Unknown=24, NotChecked=198, Total=2756 [2022-12-14 07:01:43,959 INFO L87 Difference]: Start difference. First operand 101 states and 123 transitions. Second operand has 23 states, 17 states have (on average 1.1176470588235294) internal successors, (19), 16 states have internal predecessors, (19), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-12-14 07:01:45,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:01:45,414 INFO L93 Difference]: Finished difference Result 114 states and 136 transitions. [2022-12-14 07:01:45,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-12-14 07:01:45,414 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 17 states have (on average 1.1176470588235294) internal successors, (19), 16 states have internal predecessors, (19), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 29 [2022-12-14 07:01:45,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:01:45,415 INFO L225 Difference]: With dead ends: 114 [2022-12-14 07:01:45,415 INFO L226 Difference]: Without dead ends: 114 [2022-12-14 07:01:45,416 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 30 SyntacticMatches, 3 SemanticMatches, 51 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 722 ImplicationChecksByTransitivity, 38.3s TimeCoverageRelationStatistics Valid=281, Invalid=2253, Unknown=24, NotChecked=198, Total=2756 [2022-12-14 07:01:45,416 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 101 mSDsluCounter, 115 mSDsCounter, 0 mSdLazyCounter, 769 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 144 SdHoareTripleChecker+Invalid, 773 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 769 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-12-14 07:01:45,416 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [102 Valid, 144 Invalid, 773 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 769 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-12-14 07:01:45,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2022-12-14 07:01:45,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 101. [2022-12-14 07:01:45,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 75 states have (on average 1.44) internal successors, (108), 90 states have internal predecessors, (108), 7 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-12-14 07:01:45,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 122 transitions. [2022-12-14 07:01:45,420 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 122 transitions. Word has length 29 [2022-12-14 07:01:45,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:01:45,421 INFO L495 AbstractCegarLoop]: Abstraction has 101 states and 122 transitions. [2022-12-14 07:01:45,421 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 17 states have (on average 1.1176470588235294) internal successors, (19), 16 states have internal predecessors, (19), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-12-14 07:01:45,421 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 122 transitions. [2022-12-14 07:01:45,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-12-14 07:01:45,421 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:01:45,421 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 07:01:45,426 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68d1f820-b3bd-44ff-981c-6d5644e6ec24/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-12-14 07:01:45,622 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68d1f820-b3bd-44ff-981c-6d5644e6ec24/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-12-14 07:01:45,623 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr23REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2022-12-14 07:01:45,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:01:45,624 INFO L85 PathProgramCache]: Analyzing trace with hash -165048954, now seen corresponding path program 1 times [2022-12-14 07:01:45,624 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 07:01:45,625 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [644931624] [2022-12-14 07:01:45,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:01:45,625 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 07:01:45,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:01:45,740 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-14 07:01:45,740 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 07:01:45,740 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [644931624] [2022-12-14 07:01:45,741 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [644931624] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 07:01:45,741 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1494986335] [2022-12-14 07:01:45,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:01:45,741 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 07:01:45,741 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68d1f820-b3bd-44ff-981c-6d5644e6ec24/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 07:01:45,742 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68d1f820-b3bd-44ff-981c-6d5644e6ec24/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 07:01:45,742 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68d1f820-b3bd-44ff-981c-6d5644e6ec24/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-12-14 07:01:45,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:01:45,794 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 7 conjunts are in the unsatisfiable core [2022-12-14 07:01:45,796 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 07:01:45,813 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-12-14 07:01:45,814 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 07:01:45,836 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-12-14 07:01:45,836 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1494986335] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 07:01:45,836 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1505122585] [2022-12-14 07:01:45,837 INFO L159 IcfgInterpreter]: Started Sifa with 23 locations of interest [2022-12-14 07:01:45,837 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 07:01:45,837 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 07:01:45,838 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 07:01:45,838 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 07:01:46,024 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 10 treesize of output 9 [2022-12-14 07:01:46,028 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-12-14 07:01:46,061 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 6 [2022-12-14 07:01:46,119 INFO L321 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2022-12-14 07:01:46,119 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 127 treesize of output 127 [2022-12-14 07:01:46,140 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-12-14 07:01:46,140 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 128 treesize of output 130 [2022-12-14 07:01:46,201 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 6 treesize of output 4 [2022-12-14 07:01:46,209 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-12-14 07:01:46,259 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 6 treesize of output 4 [2022-12-14 07:01:46,267 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-12-14 07:01:46,337 INFO L321 Elim1Store]: treesize reduction 28, result has 15.2 percent of original size [2022-12-14 07:01:46,338 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 200 treesize of output 196 [2022-12-14 07:01:46,382 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:01:46,392 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 07:01:46,392 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 25 treesize of output 25 [2022-12-14 07:01:46,408 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:01:46,417 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 07:01:46,417 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 25 treesize of output 25 [2022-12-14 07:01:46,464 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 07:01:46,572 INFO L197 IcfgInterpreter]: Interpreting procedure #Ultimate.meminit with input of size 70 for LOIs [2022-12-14 07:01:46,589 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 8 for LOIs [2022-12-14 07:01:46,590 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 07:01:49,150 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [1505122585] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 07:01:49,150 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-12-14 07:01:49,150 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [7, 6, 6] total 30 [2022-12-14 07:01:49,150 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2018505802] [2022-12-14 07:01:49,150 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 07:01:49,150 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-12-14 07:01:49,150 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 07:01:49,151 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-12-14 07:01:49,151 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=748, Unknown=0, NotChecked=0, Total=870 [2022-12-14 07:01:49,151 INFO L87 Difference]: Start difference. First operand 101 states and 122 transitions. Second operand has 22 states, 15 states have (on average 1.2) internal successors, (18), 15 states have internal predecessors, (18), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-12-14 07:01:52,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:01:52,278 INFO L93 Difference]: Finished difference Result 172 states and 200 transitions. [2022-12-14 07:01:52,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-12-14 07:01:52,278 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 15 states have (on average 1.2) internal successors, (18), 15 states have internal predecessors, (18), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 31 [2022-12-14 07:01:52,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:01:52,278 INFO L225 Difference]: With dead ends: 172 [2022-12-14 07:01:52,279 INFO L226 Difference]: Without dead ends: 172 [2022-12-14 07:01:52,279 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 66 SyntacticMatches, 5 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 343 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=324, Invalid=1656, Unknown=0, NotChecked=0, Total=1980 [2022-12-14 07:01:52,279 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 495 mSDsluCounter, 106 mSDsCounter, 0 mSdLazyCounter, 682 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 495 SdHoareTripleChecker+Valid, 122 SdHoareTripleChecker+Invalid, 701 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 682 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-12-14 07:01:52,279 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [495 Valid, 122 Invalid, 701 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 682 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-12-14 07:01:52,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2022-12-14 07:01:52,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 109. [2022-12-14 07:01:52,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 83 states have (on average 1.4457831325301205) internal successors, (120), 98 states have internal predecessors, (120), 7 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-12-14 07:01:52,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 134 transitions. [2022-12-14 07:01:52,282 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 134 transitions. Word has length 31 [2022-12-14 07:01:52,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:01:52,282 INFO L495 AbstractCegarLoop]: Abstraction has 109 states and 134 transitions. [2022-12-14 07:01:52,282 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 15 states have (on average 1.2) internal successors, (18), 15 states have internal predecessors, (18), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-12-14 07:01:52,282 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 134 transitions. [2022-12-14 07:01:52,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-12-14 07:01:52,282 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:01:52,283 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 07:01:52,287 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68d1f820-b3bd-44ff-981c-6d5644e6ec24/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-12-14 07:01:52,483 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68d1f820-b3bd-44ff-981c-6d5644e6ec24/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 07:01:52,484 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr23REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2022-12-14 07:01:52,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:01:52,485 INFO L85 PathProgramCache]: Analyzing trace with hash -1713326676, now seen corresponding path program 1 times [2022-12-14 07:01:52,486 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 07:01:52,486 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [897725960] [2022-12-14 07:01:52,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:01:52,487 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 07:01:52,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:01:52,563 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-14 07:01:52,563 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 07:01:52,563 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [897725960] [2022-12-14 07:01:52,564 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [897725960] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 07:01:52,564 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1837555778] [2022-12-14 07:01:52,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:01:52,564 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 07:01:52,564 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68d1f820-b3bd-44ff-981c-6d5644e6ec24/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 07:01:52,565 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68d1f820-b3bd-44ff-981c-6d5644e6ec24/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 07:01:52,569 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68d1f820-b3bd-44ff-981c-6d5644e6ec24/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-12-14 07:01:52,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:01:52,620 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 8 conjunts are in the unsatisfiable core [2022-12-14 07:01:52,621 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 07:01:52,655 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-14 07:01:52,655 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 07:01:52,690 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-14 07:01:52,690 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1837555778] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 07:01:52,691 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [255895415] [2022-12-14 07:01:52,692 INFO L159 IcfgInterpreter]: Started Sifa with 26 locations of interest [2022-12-14 07:01:52,692 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 07:01:52,692 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 07:01:52,692 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 07:01:52,693 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 07:01:52,800 INFO L321 Elim1Store]: treesize reduction 54, result has 22.9 percent of original size [2022-12-14 07:01:52,801 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 3 case distinctions, treesize of input 221 treesize of output 223 [2022-12-14 07:01:52,876 INFO L321 Elim1Store]: treesize reduction 66, result has 19.5 percent of original size [2022-12-14 07:01:52,876 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 220 treesize of output 220 [2022-12-14 07:01:52,933 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 6 [2022-12-14 07:01:53,003 INFO L321 Elim1Store]: treesize reduction 66, result has 19.5 percent of original size [2022-12-14 07:01:53,003 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 220 treesize of output 220 [2022-12-14 07:01:53,164 INFO L321 Elim1Store]: treesize reduction 96, result has 17.9 percent of original size [2022-12-14 07:01:53,164 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 253 treesize of output 256 [2022-12-14 07:01:53,267 INFO L321 Elim1Store]: treesize reduction 182, result has 12.5 percent of original size [2022-12-14 07:01:53,267 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 7 disjoint index pairs (out of 15 index pairs), introduced 7 new quantified variables, introduced 14 case distinctions, treesize of input 272 treesize of output 267 [2022-12-14 07:01:53,439 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2022-12-14 07:01:53,456 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-12-14 07:01:53,570 INFO L321 Elim1Store]: treesize reduction 182, result has 12.5 percent of original size [2022-12-14 07:01:53,570 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 7 disjoint index pairs (out of 15 index pairs), introduced 7 new quantified variables, introduced 14 case distinctions, treesize of input 272 treesize of output 267 [2022-12-14 07:01:53,733 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2022-12-14 07:01:53,748 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-12-14 07:01:53,871 INFO L321 Elim1Store]: treesize reduction 28, result has 15.2 percent of original size [2022-12-14 07:01:53,871 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 330 treesize of output 326 [2022-12-14 07:01:53,989 INFO L321 Elim1Store]: treesize reduction 28, result has 15.2 percent of original size [2022-12-14 07:01:53,989 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 330 treesize of output 326 [2022-12-14 07:01:54,060 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 07:01:54,780 INFO L321 Elim1Store]: treesize reduction 182, result has 12.5 percent of original size [2022-12-14 07:01:54,780 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 7 disjoint index pairs (out of 15 index pairs), introduced 7 new quantified variables, introduced 14 case distinctions, treesize of input 272 treesize of output 267 [2022-12-14 07:01:54,958 INFO L321 Elim1Store]: treesize reduction 66, result has 19.5 percent of original size [2022-12-14 07:01:54,958 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 220 treesize of output 220 [2022-12-14 07:01:55,064 INFO L197 IcfgInterpreter]: Interpreting procedure #Ultimate.meminit with input of size 25 for LOIs [2022-12-14 07:01:55,069 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 6 [2022-12-14 07:01:55,070 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 8 for LOIs [2022-12-14 07:01:55,071 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 07:02:02,600 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [255895415] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 07:02:02,600 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-12-14 07:02:02,601 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [8, 7, 7] total 35 [2022-12-14 07:02:02,601 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1358453510] [2022-12-14 07:02:02,601 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 07:02:02,601 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-12-14 07:02:02,601 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 07:02:02,602 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-12-14 07:02:02,602 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=186, Invalid=1004, Unknown=0, NotChecked=0, Total=1190 [2022-12-14 07:02:02,603 INFO L87 Difference]: Start difference. First operand 109 states and 134 transitions. Second operand has 25 states, 18 states have (on average 1.1666666666666667) internal successors, (21), 18 states have internal predecessors, (21), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-12-14 07:02:03,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:02:03,848 INFO L93 Difference]: Finished difference Result 126 states and 151 transitions. [2022-12-14 07:02:03,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-12-14 07:02:03,849 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 18 states have (on average 1.1666666666666667) internal successors, (21), 18 states have internal predecessors, (21), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 32 [2022-12-14 07:02:03,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:02:03,849 INFO L225 Difference]: With dead ends: 126 [2022-12-14 07:02:03,849 INFO L226 Difference]: Without dead ends: 126 [2022-12-14 07:02:03,850 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 64 SyntacticMatches, 6 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 335 ImplicationChecksByTransitivity, 7.6s TimeCoverageRelationStatistics Valid=186, Invalid=1004, Unknown=0, NotChecked=0, Total=1190 [2022-12-14 07:02:03,850 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 101 mSDsluCounter, 157 mSDsCounter, 0 mSdLazyCounter, 827 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 186 SdHoareTripleChecker+Invalid, 832 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 827 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-12-14 07:02:03,851 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [102 Valid, 186 Invalid, 832 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 827 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-12-14 07:02:03,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2022-12-14 07:02:03,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 114. [2022-12-14 07:02:03,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 88 states have (on average 1.4545454545454546) internal successors, (128), 103 states have internal predecessors, (128), 7 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-12-14 07:02:03,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 142 transitions. [2022-12-14 07:02:03,854 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 142 transitions. Word has length 32 [2022-12-14 07:02:03,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:02:03,855 INFO L495 AbstractCegarLoop]: Abstraction has 114 states and 142 transitions. [2022-12-14 07:02:03,855 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 18 states have (on average 1.1666666666666667) internal successors, (21), 18 states have internal predecessors, (21), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-12-14 07:02:03,855 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 142 transitions. [2022-12-14 07:02:03,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-12-14 07:02:03,855 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:02:03,856 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 07:02:03,860 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68d1f820-b3bd-44ff-981c-6d5644e6ec24/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-12-14 07:02:04,056 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68d1f820-b3bd-44ff-981c-6d5644e6ec24/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 07:02:04,057 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2022-12-14 07:02:04,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:02:04,057 INFO L85 PathProgramCache]: Analyzing trace with hash -143098529, now seen corresponding path program 1 times [2022-12-14 07:02:04,058 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 07:02:04,058 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2007577380] [2022-12-14 07:02:04,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:02:04,059 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 07:02:04,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:02:04,213 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-14 07:02:04,213 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 07:02:04,214 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2007577380] [2022-12-14 07:02:04,214 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2007577380] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 07:02:04,214 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1152539371] [2022-12-14 07:02:04,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:02:04,214 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 07:02:04,214 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68d1f820-b3bd-44ff-981c-6d5644e6ec24/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 07:02:04,215 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68d1f820-b3bd-44ff-981c-6d5644e6ec24/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 07:02:04,216 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68d1f820-b3bd-44ff-981c-6d5644e6ec24/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-12-14 07:02:04,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:02:04,265 INFO L263 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 10 conjunts are in the unsatisfiable core [2022-12-14 07:02:04,266 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 07:02:04,325 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-12-14 07:02:04,325 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 07:02:04,380 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-12-14 07:02:04,380 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1152539371] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 07:02:04,380 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1733925828] [2022-12-14 07:02:04,382 INFO L159 IcfgInterpreter]: Started Sifa with 23 locations of interest [2022-12-14 07:02:04,382 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 07:02:04,382 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 07:02:04,382 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 07:02:04,382 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 07:02:04,547 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 10 treesize of output 9 [2022-12-14 07:02:04,557 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-12-14 07:02:04,581 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 6 [2022-12-14 07:02:04,643 INFO L321 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2022-12-14 07:02:04,643 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 127 treesize of output 127 [2022-12-14 07:02:04,664 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-12-14 07:02:04,664 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 128 treesize of output 130 [2022-12-14 07:02:04,736 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 6 treesize of output 4 [2022-12-14 07:02:04,745 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-12-14 07:02:04,812 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 6 treesize of output 4 [2022-12-14 07:02:04,821 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-12-14 07:02:04,861 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 20 [2022-12-14 07:02:04,935 INFO L321 Elim1Store]: treesize reduction 84, result has 9.7 percent of original size [2022-12-14 07:02:04,935 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 265 treesize of output 262 [2022-12-14 07:02:04,993 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:02:05,005 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 07:02:05,005 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 25 treesize of output 25 [2022-12-14 07:02:05,023 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:02:05,034 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 07:02:05,034 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 25 treesize of output 25 [2022-12-14 07:02:05,216 INFO L321 Elim1Store]: treesize reduction 76, result has 31.5 percent of original size [2022-12-14 07:02:05,217 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 285 treesize of output 306 [2022-12-14 07:02:05,418 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:02:05,420 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:02:05,421 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:02:05,422 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:02:05,439 INFO L321 Elim1Store]: treesize reduction 28, result has 60.6 percent of original size [2022-12-14 07:02:05,440 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 47 treesize of output 70 [2022-12-14 07:02:05,471 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:02:05,473 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:02:05,474 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:02:05,475 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:02:05,496 INFO L321 Elim1Store]: treesize reduction 28, result has 60.6 percent of original size [2022-12-14 07:02:05,497 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 274 treesize of output 297 [2022-12-14 07:02:05,663 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:02:05,665 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:02:05,702 INFO L321 Elim1Store]: treesize reduction 28, result has 60.6 percent of original size [2022-12-14 07:02:05,702 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 2 case distinctions, treesize of input 276 treesize of output 309 [2022-12-14 07:02:05,802 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:02:05,804 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:02:05,844 INFO L321 Elim1Store]: treesize reduction 28, result has 60.6 percent of original size [2022-12-14 07:02:05,845 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 2 case distinctions, treesize of input 49 treesize of output 82 [2022-12-14 07:02:05,995 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:02:05,996 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 0 case distinctions, treesize of input 36 treesize of output 28 [2022-12-14 07:02:06,096 INFO L197 IcfgInterpreter]: Interpreting procedure #Ultimate.meminit with input of size 70 for LOIs [2022-12-14 07:02:06,114 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 8 for LOIs [2022-12-14 07:02:06,115 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 07:02:09,235 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '6812#(and (<= 0 |ULTIMATE.start_upsweep_#in~a#1.offset|) (<= |ULTIMATE.start_main_~n~0#1| 2147483647) (<= 0 |ULTIMATE.start_upsweep_~a#1.offset|) (<= 1 |ULTIMATE.start_upsweep_#in~n#1|) (<= 0 |ULTIMATE.start_main_~a~0#1.offset|) (<= 0 |ULTIMATE.start_is_pow2_#res#1|) (= |ULTIMATE.start_upsweep_~space~0#1| 1) (<= |ULTIMATE.start_upsweep_#in~a#1.offset| 0) (= |ULTIMATE.start_main_#t~malloc16#1.offset| 0) (<= 0 (+ |ULTIMATE.start_is_pow2_#in~x#1| 2147483648)) (= |ULTIMATE.start_upsweep_~right~0#1| (+ |ULTIMATE.start_upsweep_~space~0#1| |ULTIMATE.start_upsweep_~left~0#1|)) (<= 0 |ULTIMATE.start_upsweep_~left~0#1|) (<= |ULTIMATE.start_upsweep_~a#1.offset| 0) (<= |ULTIMATE.start_is_pow2_#res#1| 1) (<= |ULTIMATE.start_upsweep_#in~n#1| 2147483647) (not (<= (+ (* 4 |ULTIMATE.start_upsweep_~left~0#1|) |ULTIMATE.start_upsweep_~a#1.offset| 4) (select |#length| |ULTIMATE.start_upsweep_~a#1.base|))) (<= 1 |ULTIMATE.start_main_~n~0#1|) (<= 1 |ULTIMATE.start_main_~i~1#1|) (<= |ULTIMATE.start_upsweep_~n#1| 2147483647) (< |ULTIMATE.start_upsweep_~left~0#1| |ULTIMATE.start_upsweep_~n#1|) (<= 0 |ULTIMATE.start_main_~a0~0#1.offset|) (= |#NULL.offset| 0) (<= |ULTIMATE.start_is_pow2_#in~x#1| 2147483647) (= |ULTIMATE.start_main_#t~malloc15#1.offset| 0) (<= |ULTIMATE.start_main_~a0~0#1.offset| 0) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~a~0#1.offset| 0) (= |#NULL.base| 0))' at error location [2022-12-14 07:02:09,236 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 07:02:09,236 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 07:02:09,236 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 16 [2022-12-14 07:02:09,236 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1443114597] [2022-12-14 07:02:09,236 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 07:02:09,236 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-12-14 07:02:09,236 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 07:02:09,237 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-12-14 07:02:09,238 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=1259, Unknown=0, NotChecked=0, Total=1406 [2022-12-14 07:02:09,238 INFO L87 Difference]: Start difference. First operand 114 states and 142 transitions. Second operand has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-12-14 07:02:09,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:02:09,537 INFO L93 Difference]: Finished difference Result 282 states and 333 transitions. [2022-12-14 07:02:09,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-12-14 07:02:09,538 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 33 [2022-12-14 07:02:09,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:02:09,540 INFO L225 Difference]: With dead ends: 282 [2022-12-14 07:02:09,540 INFO L226 Difference]: Without dead ends: 282 [2022-12-14 07:02:09,541 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 68 SyntacticMatches, 3 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 578 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=219, Invalid=1851, Unknown=0, NotChecked=0, Total=2070 [2022-12-14 07:02:09,541 INFO L413 NwaCegarLoop]: 60 mSDtfsCounter, 657 mSDsluCounter, 537 mSDsCounter, 0 mSdLazyCounter, 355 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 660 SdHoareTripleChecker+Valid, 597 SdHoareTripleChecker+Invalid, 369 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 355 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 07:02:09,541 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [660 Valid, 597 Invalid, 369 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 355 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 07:02:09,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 282 states. [2022-12-14 07:02:09,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 282 to 131. [2022-12-14 07:02:09,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 105 states have (on average 1.4666666666666666) internal successors, (154), 120 states have internal predecessors, (154), 7 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-12-14 07:02:09,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 168 transitions. [2022-12-14 07:02:09,545 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 168 transitions. Word has length 33 [2022-12-14 07:02:09,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:02:09,545 INFO L495 AbstractCegarLoop]: Abstraction has 131 states and 168 transitions. [2022-12-14 07:02:09,546 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-12-14 07:02:09,546 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 168 transitions. [2022-12-14 07:02:09,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-12-14 07:02:09,546 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:02:09,546 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 07:02:09,551 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68d1f820-b3bd-44ff-981c-6d5644e6ec24/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2022-12-14 07:02:09,747 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68d1f820-b3bd-44ff-981c-6d5644e6ec24/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 07:02:09,748 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2022-12-14 07:02:09,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:02:09,749 INFO L85 PathProgramCache]: Analyzing trace with hash 301811303, now seen corresponding path program 1 times [2022-12-14 07:02:09,749 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 07:02:09,749 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1772062458] [2022-12-14 07:02:09,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:02:09,750 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 07:02:09,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:02:09,830 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-14 07:02:09,830 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 07:02:09,830 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1772062458] [2022-12-14 07:02:09,830 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1772062458] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 07:02:09,830 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [611230980] [2022-12-14 07:02:09,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:02:09,830 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 07:02:09,830 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68d1f820-b3bd-44ff-981c-6d5644e6ec24/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 07:02:09,831 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68d1f820-b3bd-44ff-981c-6d5644e6ec24/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 07:02:09,832 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68d1f820-b3bd-44ff-981c-6d5644e6ec24/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-12-14 07:02:09,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:02:09,892 INFO L263 TraceCheckSpWp]: Trace formula consists of 245 conjuncts, 7 conjunts are in the unsatisfiable core [2022-12-14 07:02:09,893 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 07:02:09,916 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-12-14 07:02:09,917 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 07:02:09,945 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-12-14 07:02:09,946 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [611230980] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 07:02:09,946 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2004885070] [2022-12-14 07:02:09,946 INFO L159 IcfgInterpreter]: Started Sifa with 25 locations of interest [2022-12-14 07:02:09,947 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 07:02:09,947 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 07:02:09,947 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 07:02:09,947 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 07:02:10,088 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-12-14 07:02:10,094 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 10 treesize of output 9 [2022-12-14 07:02:10,121 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 6 [2022-12-14 07:02:10,193 INFO L321 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2022-12-14 07:02:10,193 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 127 treesize of output 127 [2022-12-14 07:02:10,216 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-12-14 07:02:10,216 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 128 treesize of output 130 [2022-12-14 07:02:10,303 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 6 treesize of output 4 [2022-12-14 07:02:10,312 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-12-14 07:02:10,374 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 6 treesize of output 4 [2022-12-14 07:02:10,383 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-12-14 07:02:10,430 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 20 [2022-12-14 07:02:10,514 INFO L321 Elim1Store]: treesize reduction 84, result has 9.7 percent of original size [2022-12-14 07:02:10,515 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 259 treesize of output 256 [2022-12-14 07:02:10,573 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:02:10,584 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 07:02:10,584 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 25 treesize of output 25 [2022-12-14 07:02:10,605 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:02:10,616 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 07:02:10,616 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 25 treesize of output 25 [2022-12-14 07:02:10,775 INFO L321 Elim1Store]: treesize reduction 44, result has 44.3 percent of original size [2022-12-14 07:02:10,775 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 262 treesize of output 287 [2022-12-14 07:02:11,026 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:02:11,048 INFO L321 Elim1Store]: treesize reduction 26, result has 48.0 percent of original size [2022-12-14 07:02:11,048 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 1 new quantified variables, introduced 2 case distinctions, treesize of input 31 treesize of output 37 [2022-12-14 07:02:11,099 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:02:11,128 INFO L321 Elim1Store]: treesize reduction 26, result has 48.0 percent of original size [2022-12-14 07:02:11,128 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 1 new quantified variables, introduced 2 case distinctions, treesize of input 255 treesize of output 261 [2022-12-14 07:02:11,251 INFO L321 Elim1Store]: treesize reduction 26, result has 48.0 percent of original size [2022-12-14 07:02:11,251 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 257 treesize of output 273 [2022-12-14 07:02:11,335 INFO L321 Elim1Store]: treesize reduction 39, result has 22.0 percent of original size [2022-12-14 07:02:11,335 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 36 [2022-12-14 07:02:12,392 INFO L197 IcfgInterpreter]: Interpreting procedure #Ultimate.meminit with input of size 70 for LOIs [2022-12-14 07:02:12,416 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 8 for LOIs [2022-12-14 07:02:12,417 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 07:02:18,008 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [2004885070] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 07:02:18,008 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-12-14 07:02:18,008 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [7, 6, 6] total 31 [2022-12-14 07:02:18,008 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [424674531] [2022-12-14 07:02:18,008 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 07:02:18,009 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-12-14 07:02:18,009 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 07:02:18,009 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-12-14 07:02:18,010 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=805, Unknown=0, NotChecked=0, Total=930 [2022-12-14 07:02:18,010 INFO L87 Difference]: Start difference. First operand 131 states and 168 transitions. Second operand has 23 states, 17 states have (on average 1.1764705882352942) internal successors, (20), 16 states have internal predecessors, (20), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-12-14 07:02:23,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:02:23,035 INFO L93 Difference]: Finished difference Result 186 states and 236 transitions. [2022-12-14 07:02:23,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-12-14 07:02:23,035 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 17 states have (on average 1.1764705882352942) internal successors, (20), 16 states have internal predecessors, (20), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 33 [2022-12-14 07:02:23,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:02:23,036 INFO L225 Difference]: With dead ends: 186 [2022-12-14 07:02:23,036 INFO L226 Difference]: Without dead ends: 186 [2022-12-14 07:02:23,036 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 72 SyntacticMatches, 4 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 341 ImplicationChecksByTransitivity, 9.6s TimeCoverageRelationStatistics Valid=318, Invalid=1662, Unknown=0, NotChecked=0, Total=1980 [2022-12-14 07:02:23,037 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 367 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 815 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 367 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 832 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 815 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-12-14 07:02:23,037 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [367 Valid, 100 Invalid, 832 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 815 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-12-14 07:02:23,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2022-12-14 07:02:23,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 134. [2022-12-14 07:02:23,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 108 states have (on average 1.4537037037037037) internal successors, (157), 123 states have internal predecessors, (157), 7 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-12-14 07:02:23,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 171 transitions. [2022-12-14 07:02:23,039 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 171 transitions. Word has length 33 [2022-12-14 07:02:23,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:02:23,040 INFO L495 AbstractCegarLoop]: Abstraction has 134 states and 171 transitions. [2022-12-14 07:02:23,040 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 17 states have (on average 1.1764705882352942) internal successors, (20), 16 states have internal predecessors, (20), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-12-14 07:02:23,040 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 171 transitions. [2022-12-14 07:02:23,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-12-14 07:02:23,040 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:02:23,040 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 07:02:23,045 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68d1f820-b3bd-44ff-981c-6d5644e6ec24/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2022-12-14 07:02:23,241 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68d1f820-b3bd-44ff-981c-6d5644e6ec24/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2022-12-14 07:02:23,242 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2022-12-14 07:02:23,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:02:23,243 INFO L85 PathProgramCache]: Analyzing trace with hash -74154596, now seen corresponding path program 1 times [2022-12-14 07:02:23,244 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 07:02:23,244 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [192776638] [2022-12-14 07:02:23,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:02:23,244 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 07:02:23,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:02:23,341 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-12-14 07:02:23,342 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 07:02:23,342 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [192776638] [2022-12-14 07:02:23,342 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [192776638] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 07:02:23,342 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [328286985] [2022-12-14 07:02:23,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:02:23,342 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 07:02:23,342 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68d1f820-b3bd-44ff-981c-6d5644e6ec24/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 07:02:23,343 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68d1f820-b3bd-44ff-981c-6d5644e6ec24/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 07:02:23,343 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68d1f820-b3bd-44ff-981c-6d5644e6ec24/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-12-14 07:02:23,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:02:23,411 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-14 07:02:23,412 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 07:02:23,444 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-14 07:02:23,444 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 07:02:23,481 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-14 07:02:23,481 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [328286985] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 07:02:23,481 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2010918964] [2022-12-14 07:02:23,482 INFO L159 IcfgInterpreter]: Started Sifa with 23 locations of interest [2022-12-14 07:02:23,482 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 07:02:23,483 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 07:02:23,483 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 07:02:23,483 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 07:02:23,761 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 10 treesize of output 9 [2022-12-14 07:02:23,772 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-12-14 07:02:23,802 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 6 [2022-12-14 07:02:23,879 INFO L321 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2022-12-14 07:02:23,879 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 127 treesize of output 127 [2022-12-14 07:02:23,900 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-12-14 07:02:23,900 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 128 treesize of output 130 [2022-12-14 07:02:23,957 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 6 treesize of output 4 [2022-12-14 07:02:23,966 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-12-14 07:02:24,025 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 6 treesize of output 4 [2022-12-14 07:02:24,035 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-12-14 07:02:24,075 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 20 [2022-12-14 07:02:24,174 INFO L321 Elim1Store]: treesize reduction 84, result has 9.7 percent of original size [2022-12-14 07:02:24,174 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 265 treesize of output 262 [2022-12-14 07:02:24,227 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:02:24,235 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 07:02:24,235 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 25 treesize of output 25 [2022-12-14 07:02:24,252 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:02:24,258 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 07:02:24,258 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 07:02:24,498 INFO L321 Elim1Store]: treesize reduction 76, result has 31.5 percent of original size [2022-12-14 07:02:24,498 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 285 treesize of output 306 [2022-12-14 07:02:24,693 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:02:24,694 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:02:24,695 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:02:24,696 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:02:24,721 INFO L321 Elim1Store]: treesize reduction 28, result has 60.6 percent of original size [2022-12-14 07:02:24,721 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 47 treesize of output 70 [2022-12-14 07:02:24,766 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:02:24,768 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:02:24,769 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:02:24,769 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:02:24,802 INFO L321 Elim1Store]: treesize reduction 28, result has 60.6 percent of original size [2022-12-14 07:02:24,802 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 274 treesize of output 297 [2022-12-14 07:02:24,862 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:02:24,863 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:02:24,889 INFO L321 Elim1Store]: treesize reduction 28, result has 60.6 percent of original size [2022-12-14 07:02:24,890 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 2 case distinctions, treesize of input 49 treesize of output 82 [2022-12-14 07:02:24,954 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:02:24,955 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:02:24,985 INFO L321 Elim1Store]: treesize reduction 28, result has 60.6 percent of original size [2022-12-14 07:02:24,986 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 2 case distinctions, treesize of input 276 treesize of output 309 [2022-12-14 07:02:25,162 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:02:25,162 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 0 case distinctions, treesize of input 36 treesize of output 28 [2022-12-14 07:02:25,212 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:02:25,212 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 0 case distinctions, treesize of input 36 treesize of output 28 [2022-12-14 07:02:25,328 INFO L197 IcfgInterpreter]: Interpreting procedure #Ultimate.meminit with input of size 70 for LOIs [2022-12-14 07:02:25,345 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 8 for LOIs [2022-12-14 07:02:25,346 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 07:02:28,085 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '8050#(and (<= 0 |ULTIMATE.start_upsweep_#in~a#1.offset|) (<= |ULTIMATE.start_main_~n~0#1| 2147483647) (<= 0 |ULTIMATE.start_upsweep_~a#1.offset|) (<= 1 |ULTIMATE.start_upsweep_~space~0#1|) (<= 1 |ULTIMATE.start_upsweep_#in~n#1|) (<= 0 |ULTIMATE.start_main_~a~0#1.offset|) (<= 0 |ULTIMATE.start_is_pow2_#res#1|) (<= |ULTIMATE.start_upsweep_#in~a#1.offset| 0) (= |ULTIMATE.start_main_#t~malloc16#1.offset| 0) (<= 0 (+ |ULTIMATE.start_is_pow2_#in~x#1| 2147483648)) (= |ULTIMATE.start_upsweep_~right~0#1| (+ |ULTIMATE.start_upsweep_~space~0#1| |ULTIMATE.start_upsweep_~left~0#1|)) (<= 0 |ULTIMATE.start_upsweep_~left~0#1|) (<= |ULTIMATE.start_upsweep_~a#1.offset| 0) (<= |ULTIMATE.start_is_pow2_#res#1| 1) (<= |ULTIMATE.start_upsweep_#in~n#1| 2147483647) (not (<= (+ (* 4 |ULTIMATE.start_upsweep_~left~0#1|) |ULTIMATE.start_upsweep_~a#1.offset| 4) (select |#length| |ULTIMATE.start_upsweep_~a#1.base|))) (<= 1 |ULTIMATE.start_main_~n~0#1|) (<= 1 |ULTIMATE.start_main_~i~1#1|) (<= |ULTIMATE.start_upsweep_~n#1| 2147483647) (< |ULTIMATE.start_upsweep_~left~0#1| |ULTIMATE.start_upsweep_~n#1|) (<= 0 |ULTIMATE.start_main_~a0~0#1.offset|) (= |#NULL.offset| 0) (<= |ULTIMATE.start_is_pow2_#in~x#1| 2147483647) (= |ULTIMATE.start_main_#t~malloc15#1.offset| 0) (<= |ULTIMATE.start_main_~a0~0#1.offset| 0) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~a~0#1.offset| 0) (= |#NULL.base| 0))' at error location [2022-12-14 07:02:28,085 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 07:02:28,085 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 07:02:28,085 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 12 [2022-12-14 07:02:28,086 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1895317485] [2022-12-14 07:02:28,086 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 07:02:28,086 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-12-14 07:02:28,086 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 07:02:28,087 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-12-14 07:02:28,087 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=984, Unknown=0, NotChecked=0, Total=1122 [2022-12-14 07:02:28,087 INFO L87 Difference]: Start difference. First operand 134 states and 171 transitions. Second operand has 12 states, 12 states have (on average 3.8333333333333335) internal successors, (46), 12 states have internal predecessors, (46), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-12-14 07:02:28,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:02:28,315 INFO L93 Difference]: Finished difference Result 211 states and 247 transitions. [2022-12-14 07:02:28,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-12-14 07:02:28,315 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.8333333333333335) internal successors, (46), 12 states have internal predecessors, (46), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 35 [2022-12-14 07:02:28,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:02:28,316 INFO L225 Difference]: With dead ends: 211 [2022-12-14 07:02:28,317 INFO L226 Difference]: Without dead ends: 211 [2022-12-14 07:02:28,317 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 76 SyntacticMatches, 4 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 423 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=184, Invalid=1376, Unknown=0, NotChecked=0, Total=1560 [2022-12-14 07:02:28,318 INFO L413 NwaCegarLoop]: 81 mSDtfsCounter, 265 mSDsluCounter, 466 mSDsCounter, 0 mSdLazyCounter, 319 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 268 SdHoareTripleChecker+Valid, 547 SdHoareTripleChecker+Invalid, 322 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 319 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 07:02:28,318 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [268 Valid, 547 Invalid, 322 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 319 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 07:02:28,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2022-12-14 07:02:28,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 127. [2022-12-14 07:02:28,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 101 states have (on average 1.4158415841584158) internal successors, (143), 116 states have internal predecessors, (143), 7 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-12-14 07:02:28,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 157 transitions. [2022-12-14 07:02:28,321 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 157 transitions. Word has length 35 [2022-12-14 07:02:28,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:02:28,321 INFO L495 AbstractCegarLoop]: Abstraction has 127 states and 157 transitions. [2022-12-14 07:02:28,321 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.8333333333333335) internal successors, (46), 12 states have internal predecessors, (46), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-12-14 07:02:28,321 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 157 transitions. [2022-12-14 07:02:28,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-12-14 07:02:28,322 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:02:28,322 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 07:02:28,326 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68d1f820-b3bd-44ff-981c-6d5644e6ec24/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-12-14 07:02:28,522 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68d1f820-b3bd-44ff-981c-6d5644e6ec24/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2022-12-14 07:02:28,523 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr25REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2022-12-14 07:02:28,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:02:28,524 INFO L85 PathProgramCache]: Analyzing trace with hash -321604405, now seen corresponding path program 1 times [2022-12-14 07:02:28,525 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 07:02:28,525 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1632921932] [2022-12-14 07:02:28,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:02:28,526 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 07:02:28,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:02:28,553 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-12-14 07:02:28,553 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 07:02:28,553 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1632921932] [2022-12-14 07:02:28,553 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1632921932] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 07:02:28,553 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 07:02:28,553 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-14 07:02:28,553 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1953854450] [2022-12-14 07:02:28,554 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 07:02:28,554 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 07:02:28,554 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 07:02:28,554 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 07:02:28,554 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 07:02:28,555 INFO L87 Difference]: Start difference. First operand 127 states and 157 transitions. Second operand has 3 states, 2 states have (on average 12.5) internal successors, (25), 3 states have internal predecessors, (25), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-12-14 07:02:28,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:02:28,635 INFO L93 Difference]: Finished difference Result 147 states and 181 transitions. [2022-12-14 07:02:28,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 07:02:28,635 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 12.5) internal successors, (25), 3 states have internal predecessors, (25), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 35 [2022-12-14 07:02:28,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:02:28,636 INFO L225 Difference]: With dead ends: 147 [2022-12-14 07:02:28,637 INFO L226 Difference]: Without dead ends: 147 [2022-12-14 07:02:28,637 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 07:02:28,637 INFO L413 NwaCegarLoop]: 51 mSDtfsCounter, 8 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 87 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 07:02:28,637 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 87 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 07:02:28,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2022-12-14 07:02:28,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 137. [2022-12-14 07:02:28,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 111 states have (on average 1.4414414414414414) internal successors, (160), 126 states have internal predecessors, (160), 7 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-12-14 07:02:28,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 174 transitions. [2022-12-14 07:02:28,641 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 174 transitions. Word has length 35 [2022-12-14 07:02:28,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:02:28,641 INFO L495 AbstractCegarLoop]: Abstraction has 137 states and 174 transitions. [2022-12-14 07:02:28,641 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 12.5) internal successors, (25), 3 states have internal predecessors, (25), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-12-14 07:02:28,641 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 174 transitions. [2022-12-14 07:02:28,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-12-14 07:02:28,641 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:02:28,641 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 07:02:28,641 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2022-12-14 07:02:28,642 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr26REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2022-12-14 07:02:28,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:02:28,642 INFO L85 PathProgramCache]: Analyzing trace with hash -321604404, now seen corresponding path program 1 times [2022-12-14 07:02:28,642 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 07:02:28,642 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [285995995] [2022-12-14 07:02:28,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:02:28,642 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 07:02:28,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:02:28,720 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-14 07:02:28,720 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 07:02:28,720 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [285995995] [2022-12-14 07:02:28,720 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [285995995] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 07:02:28,721 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [785046211] [2022-12-14 07:02:28,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:02:28,721 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 07:02:28,721 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68d1f820-b3bd-44ff-981c-6d5644e6ec24/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 07:02:28,722 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68d1f820-b3bd-44ff-981c-6d5644e6ec24/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 07:02:28,722 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68d1f820-b3bd-44ff-981c-6d5644e6ec24/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-12-14 07:02:28,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:02:28,782 INFO L263 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 8 conjunts are in the unsatisfiable core [2022-12-14 07:02:28,783 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 07:02:28,821 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-14 07:02:28,821 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 07:02:28,864 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-14 07:02:28,865 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [785046211] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 07:02:28,865 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1650041304] [2022-12-14 07:02:28,866 INFO L159 IcfgInterpreter]: Started Sifa with 26 locations of interest [2022-12-14 07:02:28,866 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 07:02:28,866 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 07:02:28,866 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 07:02:28,867 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 07:02:28,991 INFO L321 Elim1Store]: treesize reduction 54, result has 22.9 percent of original size [2022-12-14 07:02:28,992 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 3 case distinctions, treesize of input 221 treesize of output 223 [2022-12-14 07:02:29,085 INFO L321 Elim1Store]: treesize reduction 66, result has 19.5 percent of original size [2022-12-14 07:02:29,085 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 220 treesize of output 220 [2022-12-14 07:02:29,160 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 6 [2022-12-14 07:02:29,243 INFO L321 Elim1Store]: treesize reduction 66, result has 19.5 percent of original size [2022-12-14 07:02:29,244 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 220 treesize of output 220 [2022-12-14 07:02:29,446 INFO L321 Elim1Store]: treesize reduction 96, result has 17.9 percent of original size [2022-12-14 07:02:29,446 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 253 treesize of output 256 [2022-12-14 07:02:29,561 INFO L321 Elim1Store]: treesize reduction 182, result has 12.5 percent of original size [2022-12-14 07:02:29,561 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 7 disjoint index pairs (out of 15 index pairs), introduced 7 new quantified variables, introduced 14 case distinctions, treesize of input 272 treesize of output 267 [2022-12-14 07:02:29,727 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2022-12-14 07:02:29,740 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-12-14 07:02:29,831 INFO L321 Elim1Store]: treesize reduction 182, result has 12.5 percent of original size [2022-12-14 07:02:29,832 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 7 disjoint index pairs (out of 15 index pairs), introduced 7 new quantified variables, introduced 14 case distinctions, treesize of input 272 treesize of output 267 [2022-12-14 07:02:29,980 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2022-12-14 07:02:29,993 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-12-14 07:02:30,103 INFO L321 Elim1Store]: treesize reduction 28, result has 15.2 percent of original size [2022-12-14 07:02:30,104 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 330 treesize of output 326 [2022-12-14 07:02:30,209 INFO L321 Elim1Store]: treesize reduction 28, result has 15.2 percent of original size [2022-12-14 07:02:30,209 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 330 treesize of output 326 [2022-12-14 07:02:30,279 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 07:02:30,946 INFO L321 Elim1Store]: treesize reduction 182, result has 12.5 percent of original size [2022-12-14 07:02:30,946 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 7 disjoint index pairs (out of 15 index pairs), introduced 7 new quantified variables, introduced 14 case distinctions, treesize of input 272 treesize of output 267 [2022-12-14 07:02:31,139 INFO L321 Elim1Store]: treesize reduction 66, result has 19.5 percent of original size [2022-12-14 07:02:31,140 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 220 treesize of output 220 [2022-12-14 07:02:31,246 INFO L197 IcfgInterpreter]: Interpreting procedure #Ultimate.meminit with input of size 25 for LOIs [2022-12-14 07:02:31,251 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 6 [2022-12-14 07:02:31,252 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 8 for LOIs [2022-12-14 07:02:31,253 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 07:02:39,227 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '8925#(and (not (< |ULTIMATE.start_main_~i~1#1| |ULTIMATE.start_main_~n~0#1|)) (= |ULTIMATE.start_check_~a#1.offset| |ULTIMATE.start_check_#in~a#1.offset|) (= |ULTIMATE.start_downsweep_~a#1.offset| |ULTIMATE.start_downsweep_#in~a#1.offset|) (= |ULTIMATE.start_check_#in~n#1| |ULTIMATE.start_check_~n#1|) (= |ULTIMATE.start_check_#in~a#1.base| |ULTIMATE.start_main_~a~0#1.base|) (= |ULTIMATE.start_upsweep_#in~a#1.base| |ULTIMATE.start_upsweep_~a#1.base|) (<= 0 |ULTIMATE.start_is_pow2_#res#1|) (= |ULTIMATE.start_check_#in~a0#1.base| |ULTIMATE.start_check_~a0#1.base|) (= |ULTIMATE.start_upsweep_#in~a#1.offset| |ULTIMATE.start_upsweep_~a#1.offset|) (= |ULTIMATE.start_main_~a~0#1.offset| |ULTIMATE.start_downsweep_#in~a#1.offset|) (<= |ULTIMATE.start_is_pow2_~x#1| 2147483647) (not (< 0 |ULTIMATE.start_downsweep_~space#1|)) (= |ULTIMATE.start_main_#t~malloc16#1.offset| 0) (= |ULTIMATE.start_main_~n~0#1| |ULTIMATE.start_upsweep_#in~n#1|) (<= 0 (+ |ULTIMATE.start_is_pow2_#in~x#1| 2147483648)) (= |ULTIMATE.start_check_~sum~0#1| 0) (= |ULTIMATE.start_main_~a0~0#1.base| |ULTIMATE.start_check_#in~a0#1.base|) (= |ULTIMATE.start_check_~i~0#1| 0) (= |ULTIMATE.start_upsweep_~space~0#1| |ULTIMATE.start_upsweep_#res#1|) (= (ite (and (< |ULTIMATE.start_downsweep_#in~space#1| 0) (not (= (mod |ULTIMATE.start_downsweep_#in~space#1| 2) 0))) (+ (div |ULTIMATE.start_downsweep_#in~space#1| 2) 1) (div |ULTIMATE.start_downsweep_#in~space#1| 2)) |ULTIMATE.start_downsweep_~space#1|) (= |ULTIMATE.start_main_~a~0#1.offset| |ULTIMATE.start_check_#in~a#1.offset|) (= |ULTIMATE.start_upsweep_~n#1| |ULTIMATE.start_upsweep_#in~n#1|) (= |ULTIMATE.start_upsweep_#res#1| |ULTIMATE.start_main_~space~1#1|) (= |ULTIMATE.start_main_~a~0#1.base| |ULTIMATE.start_downsweep_#in~a#1.base|) (= (ite (= |ULTIMATE.start_check_~sum~0#1| (select (select |#memory_int| |ULTIMATE.start_check_~a#1.base|) (+ |ULTIMATE.start_check_~a#1.offset| (* |ULTIMATE.start_check_~i~0#1| 4)))) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= |ULTIMATE.start_main_~i~1#1| 1) (not (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0)) (not (< |ULTIMATE.start_upsweep_~space~0#1| |ULTIMATE.start_upsweep_~n#1|)) (= |ULTIMATE.start_main_~n~0#1| |ULTIMATE.start_check_#in~n#1|) (<= |ULTIMATE.start_is_pow2_#res#1| 1) (= (select |#valid| |ULTIMATE.start_check_~a#1.base|) 1) (= |ULTIMATE.start_upsweep_#in~a#1.base| |ULTIMATE.start_main_~a~0#1.base|) (= |ULTIMATE.start_downsweep_#in~n#1| |ULTIMATE.start_downsweep_~n#1|) (not (<= (+ (* |ULTIMATE.start_check_~i~0#1| 4) 4 |ULTIMATE.start_check_~a0#1.offset|) (select |#length| |ULTIMATE.start_check_~a0#1.base|))) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |ULTIMATE.start_main_~a0~0#1.offset|) (= |#NULL.offset| 0) (<= |ULTIMATE.start_is_pow2_#in~x#1| 2147483647) (= |ULTIMATE.start_check_#in~a0#1.offset| |ULTIMATE.start_main_~a0~0#1.offset|) (= |ULTIMATE.start_main_#t~malloc15#1.offset| 0) (<= (+ |ULTIMATE.start_check_~a#1.offset| (* |ULTIMATE.start_check_~i~0#1| 4) 4) (select |#length| |ULTIMATE.start_check_~a#1.base|)) (= |ULTIMATE.start_downsweep_#in~a#1.base| |ULTIMATE.start_downsweep_~a#1.base|) (= |ULTIMATE.start_check_~a#1.base| |ULTIMATE.start_check_#in~a#1.base|) (<= |ULTIMATE.start_main_~a0~0#1.offset| 0) (= |ULTIMATE.start_main_~a~0#1.offset| |ULTIMATE.start_upsweep_#in~a#1.offset|) (<= 0 (+ |ULTIMATE.start_is_pow2_~x#1| 2147483648)) (<= 0 |#StackHeapBarrier|) (= |ULTIMATE.start_check_#in~a0#1.offset| |ULTIMATE.start_check_~a0#1.offset|) (<= |ULTIMATE.start_main_~a~0#1.offset| 0) (= |ULTIMATE.start_downsweep_#in~space#1| |ULTIMATE.start_main_~space~1#1|) (= |ULTIMATE.start_downsweep_#in~n#1| |ULTIMATE.start_main_~n~0#1|) (<= 4 (+ |ULTIMATE.start_downsweep_~a#1.offset| (* |ULTIMATE.start_downsweep_~n#1| 4))) (= |#NULL.base| 0))' at error location [2022-12-14 07:02:39,227 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 07:02:39,227 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 07:02:39,227 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 12 [2022-12-14 07:02:39,228 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1215366829] [2022-12-14 07:02:39,228 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 07:02:39,228 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-12-14 07:02:39,228 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 07:02:39,228 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-12-14 07:02:39,228 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=200, Invalid=1060, Unknown=0, NotChecked=0, Total=1260 [2022-12-14 07:02:39,229 INFO L87 Difference]: Start difference. First operand 137 states and 174 transitions. Second operand has 12 states, 12 states have (on average 3.6666666666666665) internal successors, (44), 12 states have internal predecessors, (44), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-12-14 07:02:39,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:02:39,435 INFO L93 Difference]: Finished difference Result 143 states and 177 transitions. [2022-12-14 07:02:39,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-12-14 07:02:39,435 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.6666666666666665) internal successors, (44), 12 states have internal predecessors, (44), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 35 [2022-12-14 07:02:39,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:02:39,437 INFO L225 Difference]: With dead ends: 143 [2022-12-14 07:02:39,437 INFO L226 Difference]: Without dead ends: 143 [2022-12-14 07:02:39,438 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 72 SyntacticMatches, 6 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 523 ImplicationChecksByTransitivity, 8.1s TimeCoverageRelationStatistics Valid=244, Invalid=1396, Unknown=0, NotChecked=0, Total=1640 [2022-12-14 07:02:39,438 INFO L413 NwaCegarLoop]: 46 mSDtfsCounter, 103 mSDsluCounter, 330 mSDsCounter, 0 mSdLazyCounter, 246 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 376 SdHoareTripleChecker+Invalid, 248 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 246 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 07:02:39,439 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [106 Valid, 376 Invalid, 248 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 246 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 07:02:39,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2022-12-14 07:02:39,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 133. [2022-12-14 07:02:39,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 107 states have (on average 1.439252336448598) internal successors, (154), 122 states have internal predecessors, (154), 7 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-12-14 07:02:39,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 168 transitions. [2022-12-14 07:02:39,441 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 168 transitions. Word has length 35 [2022-12-14 07:02:39,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:02:39,442 INFO L495 AbstractCegarLoop]: Abstraction has 133 states and 168 transitions. [2022-12-14 07:02:39,442 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.6666666666666665) internal successors, (44), 12 states have internal predecessors, (44), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-12-14 07:02:39,442 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 168 transitions. [2022-12-14 07:02:39,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-12-14 07:02:39,442 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:02:39,442 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 07:02:39,446 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68d1f820-b3bd-44ff-981c-6d5644e6ec24/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-12-14 07:02:39,642 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68d1f820-b3bd-44ff-981c-6d5644e6ec24/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 07:02:39,643 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2022-12-14 07:02:39,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:02:39,643 INFO L85 PathProgramCache]: Analyzing trace with hash 1983487380, now seen corresponding path program 2 times [2022-12-14 07:02:39,643 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 07:02:39,643 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1021245459] [2022-12-14 07:02:39,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:02:39,643 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 07:02:39,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:02:39,809 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-12-14 07:02:39,810 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 07:02:39,810 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1021245459] [2022-12-14 07:02:39,810 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1021245459] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 07:02:39,810 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1828090262] [2022-12-14 07:02:39,810 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 07:02:39,810 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 07:02:39,810 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68d1f820-b3bd-44ff-981c-6d5644e6ec24/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 07:02:39,811 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68d1f820-b3bd-44ff-981c-6d5644e6ec24/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 07:02:39,812 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68d1f820-b3bd-44ff-981c-6d5644e6ec24/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-12-14 07:02:39,864 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-12-14 07:02:39,864 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 07:02:39,865 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 17 conjunts are in the unsatisfiable core [2022-12-14 07:02:39,866 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 07:02:39,965 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-12-14 07:02:39,966 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 07:02:40,193 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-12-14 07:02:40,193 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1828090262] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 07:02:40,193 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1983552386] [2022-12-14 07:02:40,194 INFO L159 IcfgInterpreter]: Started Sifa with 23 locations of interest [2022-12-14 07:02:40,195 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 07:02:40,195 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 07:02:40,195 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 07:02:40,195 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 07:02:40,411 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-12-14 07:02:40,416 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 10 treesize of output 9 [2022-12-14 07:02:40,442 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 6 [2022-12-14 07:02:40,504 INFO L321 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2022-12-14 07:02:40,505 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 127 treesize of output 127 [2022-12-14 07:02:40,523 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-12-14 07:02:40,523 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 128 treesize of output 130 [2022-12-14 07:02:40,590 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 6 treesize of output 4 [2022-12-14 07:02:40,599 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-12-14 07:02:40,664 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 6 treesize of output 4 [2022-12-14 07:02:40,673 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-12-14 07:02:40,745 INFO L321 Elim1Store]: treesize reduction 28, result has 15.2 percent of original size [2022-12-14 07:02:40,745 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 200 treesize of output 196 [2022-12-14 07:02:40,792 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:02:40,800 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 07:02:40,801 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 25 treesize of output 25 [2022-12-14 07:02:40,820 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:02:40,827 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 07:02:40,828 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 25 treesize of output 25 [2022-12-14 07:02:40,890 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:02:40,890 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 0 case distinctions, treesize of input 36 treesize of output 28 [2022-12-14 07:02:40,929 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:02:40,929 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 0 case distinctions, treesize of input 36 treesize of output 28 [2022-12-14 07:02:41,022 INFO L197 IcfgInterpreter]: Interpreting procedure #Ultimate.meminit with input of size 70 for LOIs [2022-12-14 07:02:41,042 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 8 for LOIs [2022-12-14 07:02:41,043 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 07:02:44,267 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '9471#(and (<= 0 |ULTIMATE.start_upsweep_#in~a#1.offset|) (<= |ULTIMATE.start_main_~n~0#1| 2147483647) (<= 0 |ULTIMATE.start_upsweep_~a#1.offset|) (<= 1 |ULTIMATE.start_upsweep_#in~n#1|) (<= 0 |ULTIMATE.start_main_~a~0#1.offset|) (<= 0 |ULTIMATE.start_is_pow2_#res#1|) (= |ULTIMATE.start_upsweep_~space~0#1| 1) (<= |ULTIMATE.start_upsweep_#in~a#1.offset| 0) (= |ULTIMATE.start_main_#t~malloc16#1.offset| 0) (<= 0 (+ |ULTIMATE.start_is_pow2_#in~x#1| 2147483648)) (= |ULTIMATE.start_upsweep_~right~0#1| (+ |ULTIMATE.start_upsweep_~space~0#1| |ULTIMATE.start_upsweep_~left~0#1|)) (<= 0 |ULTIMATE.start_upsweep_~left~0#1|) (<= |ULTIMATE.start_upsweep_~a#1.offset| 0) (<= |ULTIMATE.start_is_pow2_#res#1| 1) (<= |ULTIMATE.start_upsweep_#in~n#1| 2147483647) (not (<= (+ (* 4 |ULTIMATE.start_upsweep_~left~0#1|) |ULTIMATE.start_upsweep_~a#1.offset| 4) (select |#length| |ULTIMATE.start_upsweep_~a#1.base|))) (<= 1 |ULTIMATE.start_main_~n~0#1|) (<= 1 |ULTIMATE.start_main_~i~1#1|) (<= |ULTIMATE.start_upsweep_~n#1| 2147483647) (< |ULTIMATE.start_upsweep_~left~0#1| |ULTIMATE.start_upsweep_~n#1|) (<= 0 |ULTIMATE.start_main_~a0~0#1.offset|) (= |#NULL.offset| 0) (<= |ULTIMATE.start_is_pow2_#in~x#1| 2147483647) (= |ULTIMATE.start_main_#t~malloc15#1.offset| 0) (<= |ULTIMATE.start_main_~a0~0#1.offset| 0) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~a~0#1.offset| 0) (= |#NULL.base| 0))' at error location [2022-12-14 07:02:44,267 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 07:02:44,267 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 07:02:44,268 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8, 8] total 25 [2022-12-14 07:02:44,268 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1953111493] [2022-12-14 07:02:44,268 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 07:02:44,268 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-12-14 07:02:44,268 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 07:02:44,268 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-12-14 07:02:44,269 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=230, Invalid=2026, Unknown=0, NotChecked=0, Total=2256 [2022-12-14 07:02:44,269 INFO L87 Difference]: Start difference. First operand 133 states and 168 transitions. Second operand has 26 states, 25 states have (on average 2.08) internal successors, (52), 26 states have internal predecessors, (52), 3 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2022-12-14 07:02:45,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:02:45,731 INFO L93 Difference]: Finished difference Result 422 states and 528 transitions. [2022-12-14 07:02:45,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-12-14 07:02:45,732 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 2.08) internal successors, (52), 26 states have internal predecessors, (52), 3 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) Word has length 36 [2022-12-14 07:02:45,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:02:45,733 INFO L225 Difference]: With dead ends: 422 [2022-12-14 07:02:45,733 INFO L226 Difference]: Without dead ends: 422 [2022-12-14 07:02:45,734 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1459 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=809, Invalid=4741, Unknown=0, NotChecked=0, Total=5550 [2022-12-14 07:02:45,734 INFO L413 NwaCegarLoop]: 71 mSDtfsCounter, 1140 mSDsluCounter, 501 mSDsCounter, 0 mSdLazyCounter, 946 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1140 SdHoareTripleChecker+Valid, 572 SdHoareTripleChecker+Invalid, 968 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 946 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-12-14 07:02:45,734 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1140 Valid, 572 Invalid, 968 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 946 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-12-14 07:02:45,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 422 states. [2022-12-14 07:02:45,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 422 to 138. [2022-12-14 07:02:45,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138 states, 112 states have (on average 1.4464285714285714) internal successors, (162), 127 states have internal predecessors, (162), 7 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-12-14 07:02:45,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 176 transitions. [2022-12-14 07:02:45,738 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 176 transitions. Word has length 36 [2022-12-14 07:02:45,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:02:45,738 INFO L495 AbstractCegarLoop]: Abstraction has 138 states and 176 transitions. [2022-12-14 07:02:45,738 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 25 states have (on average 2.08) internal successors, (52), 26 states have internal predecessors, (52), 3 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2022-12-14 07:02:45,738 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 176 transitions. [2022-12-14 07:02:45,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-12-14 07:02:45,739 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:02:45,739 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 07:02:45,744 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68d1f820-b3bd-44ff-981c-6d5644e6ec24/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2022-12-14 07:02:45,939 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68d1f820-b3bd-44ff-981c-6d5644e6ec24/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2022-12-14 07:02:45,939 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr23REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2022-12-14 07:02:45,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:02:45,940 INFO L85 PathProgramCache]: Analyzing trace with hash 1898023530, now seen corresponding path program 1 times [2022-12-14 07:02:45,940 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 07:02:45,940 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1623592091] [2022-12-14 07:02:45,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:02:45,940 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 07:02:45,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:02:46,015 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-14 07:02:46,016 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 07:02:46,016 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1623592091] [2022-12-14 07:02:46,016 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1623592091] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 07:02:46,016 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1258014916] [2022-12-14 07:02:46,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:02:46,016 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 07:02:46,016 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68d1f820-b3bd-44ff-981c-6d5644e6ec24/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 07:02:46,017 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68d1f820-b3bd-44ff-981c-6d5644e6ec24/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 07:02:46,018 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68d1f820-b3bd-44ff-981c-6d5644e6ec24/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-12-14 07:02:46,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:02:46,082 INFO L263 TraceCheckSpWp]: Trace formula consists of 254 conjuncts, 7 conjunts are in the unsatisfiable core [2022-12-14 07:02:46,082 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 07:02:46,107 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-12-14 07:02:46,107 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 07:02:46,140 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-12-14 07:02:46,140 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1258014916] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 07:02:46,140 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [335273373] [2022-12-14 07:02:46,141 INFO L159 IcfgInterpreter]: Started Sifa with 26 locations of interest [2022-12-14 07:02:46,142 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 07:02:46,142 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 07:02:46,142 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 07:02:46,142 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 07:02:46,406 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-12-14 07:02:46,410 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 10 treesize of output 9 [2022-12-14 07:02:46,434 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 6 [2022-12-14 07:02:46,494 INFO L321 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2022-12-14 07:02:46,494 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 127 treesize of output 127 [2022-12-14 07:02:46,510 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-12-14 07:02:46,510 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 128 treesize of output 130 [2022-12-14 07:02:46,569 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 6 treesize of output 4 [2022-12-14 07:02:46,577 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-12-14 07:02:46,641 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 6 treesize of output 4 [2022-12-14 07:02:46,650 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-12-14 07:02:46,688 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 20 [2022-12-14 07:02:46,766 INFO L321 Elim1Store]: treesize reduction 84, result has 9.7 percent of original size [2022-12-14 07:02:46,766 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 265 treesize of output 262 [2022-12-14 07:02:46,824 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:02:46,831 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 07:02:46,832 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 25 treesize of output 25 [2022-12-14 07:02:46,850 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:02:46,863 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 07:02:46,864 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 25 treesize of output 25 [2022-12-14 07:02:47,001 INFO L321 Elim1Store]: treesize reduction 44, result has 44.3 percent of original size [2022-12-14 07:02:47,002 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 265 treesize of output 290 [2022-12-14 07:02:47,199 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:02:47,210 INFO L321 Elim1Store]: treesize reduction 26, result has 48.0 percent of original size [2022-12-14 07:02:47,211 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 1 new quantified variables, introduced 2 case distinctions, treesize of input 31 treesize of output 37 [2022-12-14 07:02:47,263 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:02:47,283 INFO L321 Elim1Store]: treesize reduction 26, result has 48.0 percent of original size [2022-12-14 07:02:47,283 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 1 new quantified variables, introduced 2 case distinctions, treesize of input 258 treesize of output 264 [2022-12-14 07:02:47,399 INFO L321 Elim1Store]: treesize reduction 39, result has 22.0 percent of original size [2022-12-14 07:02:47,399 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 36 [2022-12-14 07:02:47,483 INFO L321 Elim1Store]: treesize reduction 26, result has 48.0 percent of original size [2022-12-14 07:02:47,483 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 260 treesize of output 276 [2022-12-14 07:02:50,307 INFO L197 IcfgInterpreter]: Interpreting procedure #Ultimate.meminit with input of size 70 for LOIs [2022-12-14 07:02:50,329 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 8 for LOIs [2022-12-14 07:02:50,330 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 07:02:57,490 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '10327#(and (<= 0 |ULTIMATE.start_upsweep_#in~a#1.offset|) (<= 0 |ULTIMATE.start_upsweep_~a#1.offset|) (< |ULTIMATE.start_check_~i~0#1| |ULTIMATE.start_check_~n#1|) (<= |ULTIMATE.start_downsweep_~space#1| 0) (<= |ULTIMATE.start_upsweep_#res#1| 1) (<= 0 |ULTIMATE.start_main_~a~0#1.offset|) (<= 0 |ULTIMATE.start_is_pow2_#res#1|) (<= 1 |ULTIMATE.start_main_~space~1#1|) (= |ULTIMATE.start_upsweep_~space~0#1| 1) (<= |ULTIMATE.start_upsweep_#in~a#1.offset| 0) (<= |ULTIMATE.start_check_~n#1| 1) (<= 0 |ULTIMATE.start_downsweep_#in~n#1|) (<= 0 |ULTIMATE.start_downsweep_~a#1.offset|) (= |ULTIMATE.start_main_#t~malloc16#1.offset| 0) (<= 0 (+ |ULTIMATE.start_is_pow2_#in~x#1| 2147483648)) (<= |ULTIMATE.start_downsweep_#in~n#1| 1) (<= 1 |ULTIMATE.start_upsweep_#res#1|) (<= |ULTIMATE.start_main_~space~1#1| 1) (<= |ULTIMATE.start_upsweep_~n#1| 1) (<= |ULTIMATE.start_check_#in~a0#1.offset| 0) (<= 0 |ULTIMATE.start_check_~i~0#1|) (<= 0 |ULTIMATE.start_upsweep_~n#1|) (<= |ULTIMATE.start_check_#in~n#1| 1) (<= 0 |ULTIMATE.start_downsweep_~n#1|) (<= |ULTIMATE.start_check_~a0#1.offset| 0) (<= 0 |ULTIMATE.start_downsweep_#in~a#1.offset|) (<= 1 |ULTIMATE.start_downsweep_#in~space#1|) (not (<= (+ |ULTIMATE.start_check_~a#1.offset| (* |ULTIMATE.start_check_~i~0#1| 4) 4) (select |#length| |ULTIMATE.start_check_~a#1.base|))) (<= |ULTIMATE.start_upsweep_#in~n#1| 1) (<= |ULTIMATE.start_downsweep_~n#1| 1) (<= |ULTIMATE.start_check_#in~a#1.offset| 0) (<= |ULTIMATE.start_upsweep_~a#1.offset| 0) (<= |ULTIMATE.start_is_pow2_#res#1| 1) (<= |ULTIMATE.start_downsweep_~a#1.offset| 0) (<= 0 |ULTIMATE.start_upsweep_#in~n#1|) (<= 1 |ULTIMATE.start_main_~i~1#1|) (<= |ULTIMATE.start_check_~a#1.offset| 0) (<= 0 |ULTIMATE.start_main_~a0~0#1.offset|) (= |#NULL.offset| 0) (<= |ULTIMATE.start_is_pow2_#in~x#1| 2147483647) (<= |ULTIMATE.start_downsweep_#in~a#1.offset| 0) (= |ULTIMATE.start_main_#t~malloc15#1.offset| 0) (<= 0 |ULTIMATE.start_check_~a0#1.offset|) (<= 0 |ULTIMATE.start_check_~a#1.offset|) (<= |ULTIMATE.start_main_~a0~0#1.offset| 0) (<= 0 |ULTIMATE.start_check_#in~n#1|) (<= |ULTIMATE.start_main_~n~0#1| 1) (<= 0 |ULTIMATE.start_main_~n~0#1|) (<= 0 |ULTIMATE.start_check_#in~a0#1.offset|) (<= |ULTIMATE.start_downsweep_#in~space#1| 1) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~a~0#1.offset| 0) (<= 0 |ULTIMATE.start_check_#in~a#1.offset|) (= |#NULL.base| 0))' at error location [2022-12-14 07:02:57,490 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 07:02:57,490 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 07:02:57,490 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 10 [2022-12-14 07:02:57,490 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [791611562] [2022-12-14 07:02:57,490 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 07:02:57,490 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-12-14 07:02:57,490 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 07:02:57,491 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-12-14 07:02:57,491 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=163, Invalid=1027, Unknown=0, NotChecked=0, Total=1190 [2022-12-14 07:02:57,492 INFO L87 Difference]: Start difference. First operand 138 states and 176 transitions. Second operand has 10 states, 10 states have (on average 3.5) internal successors, (35), 10 states have internal predecessors, (35), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-12-14 07:02:57,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:02:57,616 INFO L93 Difference]: Finished difference Result 143 states and 176 transitions. [2022-12-14 07:02:57,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-12-14 07:02:57,616 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.5) internal successors, (35), 10 states have internal predecessors, (35), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 36 [2022-12-14 07:02:57,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:02:57,617 INFO L225 Difference]: With dead ends: 143 [2022-12-14 07:02:57,617 INFO L226 Difference]: Without dead ends: 143 [2022-12-14 07:02:57,617 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 78 SyntacticMatches, 3 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 368 ImplicationChecksByTransitivity, 7.2s TimeCoverageRelationStatistics Valid=195, Invalid=1365, Unknown=0, NotChecked=0, Total=1560 [2022-12-14 07:02:57,618 INFO L413 NwaCegarLoop]: 57 mSDtfsCounter, 178 mSDsluCounter, 190 mSDsCounter, 0 mSdLazyCounter, 189 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 181 SdHoareTripleChecker+Valid, 247 SdHoareTripleChecker+Invalid, 190 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 189 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 07:02:57,618 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [181 Valid, 247 Invalid, 190 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 189 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 07:02:57,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2022-12-14 07:02:57,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 131. [2022-12-14 07:02:57,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 105 states have (on average 1.457142857142857) internal successors, (153), 120 states have internal predecessors, (153), 7 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-12-14 07:02:57,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 167 transitions. [2022-12-14 07:02:57,620 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 167 transitions. Word has length 36 [2022-12-14 07:02:57,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:02:57,620 INFO L495 AbstractCegarLoop]: Abstraction has 131 states and 167 transitions. [2022-12-14 07:02:57,621 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.5) internal successors, (35), 10 states have internal predecessors, (35), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-12-14 07:02:57,621 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 167 transitions. [2022-12-14 07:02:57,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-12-14 07:02:57,621 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:02:57,621 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 07:02:57,626 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68d1f820-b3bd-44ff-981c-6d5644e6ec24/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2022-12-14 07:02:57,822 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68d1f820-b3bd-44ff-981c-6d5644e6ec24/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-12-14 07:02:57,823 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr31ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2022-12-14 07:02:57,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:02:57,824 INFO L85 PathProgramCache]: Analyzing trace with hash 1129897292, now seen corresponding path program 1 times [2022-12-14 07:02:57,825 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 07:02:57,825 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1070989999] [2022-12-14 07:02:57,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:02:57,826 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 07:02:57,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:02:57,887 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-14 07:02:57,887 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 07:02:57,887 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1070989999] [2022-12-14 07:02:57,887 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1070989999] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 07:02:57,887 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 07:02:57,887 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 07:02:57,887 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [244547123] [2022-12-14 07:02:57,887 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 07:02:57,888 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 07:02:57,888 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 07:02:57,888 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 07:02:57,888 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 07:02:57,888 INFO L87 Difference]: Start difference. First operand 131 states and 167 transitions. Second operand has 4 states, 3 states have (on average 8.666666666666666) internal successors, (26), 4 states have internal predecessors, (26), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-12-14 07:02:57,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:02:57,946 INFO L93 Difference]: Finished difference Result 130 states and 166 transitions. [2022-12-14 07:02:57,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 07:02:57,946 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 8.666666666666666) internal successors, (26), 4 states have internal predecessors, (26), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 36 [2022-12-14 07:02:57,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:02:57,946 INFO L225 Difference]: With dead ends: 130 [2022-12-14 07:02:57,946 INFO L226 Difference]: Without dead ends: 130 [2022-12-14 07:02:57,947 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-12-14 07:02:57,947 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 82 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 07:02:57,947 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [82 Valid, 58 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 07:02:57,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2022-12-14 07:02:57,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 130. [2022-12-14 07:02:57,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130 states, 105 states have (on average 1.4476190476190476) internal successors, (152), 119 states have internal predecessors, (152), 7 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-12-14 07:02:57,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 166 transitions. [2022-12-14 07:02:57,949 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 166 transitions. Word has length 36 [2022-12-14 07:02:57,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:02:57,950 INFO L495 AbstractCegarLoop]: Abstraction has 130 states and 166 transitions. [2022-12-14 07:02:57,950 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 8.666666666666666) internal successors, (26), 4 states have internal predecessors, (26), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-12-14 07:02:57,950 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 166 transitions. [2022-12-14 07:02:57,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-12-14 07:02:57,950 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:02:57,950 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 07:02:57,950 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2022-12-14 07:02:57,951 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2022-12-14 07:02:57,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:02:57,951 INFO L85 PathProgramCache]: Analyzing trace with hash 1358566643, now seen corresponding path program 1 times [2022-12-14 07:02:57,951 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 07:02:57,951 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1732121145] [2022-12-14 07:02:57,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:02:57,951 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 07:02:57,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:02:58,265 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-14 07:02:58,265 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 07:02:58,265 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1732121145] [2022-12-14 07:02:58,265 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1732121145] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 07:02:58,265 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [181821998] [2022-12-14 07:02:58,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:02:58,266 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 07:02:58,266 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68d1f820-b3bd-44ff-981c-6d5644e6ec24/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 07:02:58,266 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68d1f820-b3bd-44ff-981c-6d5644e6ec24/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 07:02:58,267 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68d1f820-b3bd-44ff-981c-6d5644e6ec24/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-12-14 07:02:58,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:02:58,454 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 14 conjunts are in the unsatisfiable core [2022-12-14 07:02:58,454 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 07:02:58,579 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-12-14 07:02:58,579 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 07:02:58,731 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-12-14 07:02:58,731 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [181821998] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 07:02:58,731 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [64202664] [2022-12-14 07:02:58,732 INFO L159 IcfgInterpreter]: Started Sifa with 23 locations of interest [2022-12-14 07:02:58,732 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 07:02:58,732 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 07:02:58,732 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 07:02:58,732 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 07:02:58,907 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 10 treesize of output 9 [2022-12-14 07:02:58,911 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-12-14 07:02:58,943 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 6 [2022-12-14 07:02:59,008 INFO L321 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2022-12-14 07:02:59,008 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 127 treesize of output 127 [2022-12-14 07:02:59,027 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-12-14 07:02:59,027 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 128 treesize of output 130 [2022-12-14 07:02:59,093 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 6 treesize of output 4 [2022-12-14 07:02:59,101 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-12-14 07:02:59,173 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 6 treesize of output 4 [2022-12-14 07:02:59,182 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-12-14 07:02:59,224 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 30 [2022-12-14 07:02:59,305 INFO L321 Elim1Store]: treesize reduction 84, result has 9.7 percent of original size [2022-12-14 07:02:59,305 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 266 treesize of output 263 [2022-12-14 07:02:59,365 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:02:59,373 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 07:02:59,373 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 25 treesize of output 25 [2022-12-14 07:02:59,392 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:02:59,400 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 07:02:59,400 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 25 treesize of output 25 [2022-12-14 07:02:59,569 INFO L321 Elim1Store]: treesize reduction 76, result has 31.5 percent of original size [2022-12-14 07:02:59,569 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 282 treesize of output 303 [2022-12-14 07:02:59,805 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:02:59,807 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:02:59,809 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:02:59,831 INFO L321 Elim1Store]: treesize reduction 28, result has 60.6 percent of original size [2022-12-14 07:02:59,831 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 47 treesize of output 70 [2022-12-14 07:02:59,858 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:02:59,860 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:02:59,861 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:02:59,890 INFO L321 Elim1Store]: treesize reduction 28, result has 60.6 percent of original size [2022-12-14 07:02:59,890 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 271 treesize of output 294 [2022-12-14 07:02:59,946 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:02:59,948 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:02:59,970 INFO L321 Elim1Store]: treesize reduction 28, result has 60.6 percent of original size [2022-12-14 07:02:59,970 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 2 case distinctions, treesize of input 273 treesize of output 306 [2022-12-14 07:03:00,058 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:03:00,060 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:03:00,086 INFO L321 Elim1Store]: treesize reduction 28, result has 60.6 percent of original size [2022-12-14 07:03:00,086 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 2 case distinctions, treesize of input 49 treesize of output 82 [2022-12-14 07:03:00,292 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:03:00,292 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 0 case distinctions, treesize of input 36 treesize of output 28 [2022-12-14 07:03:00,403 INFO L197 IcfgInterpreter]: Interpreting procedure #Ultimate.meminit with input of size 70 for LOIs [2022-12-14 07:03:00,425 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 8 for LOIs [2022-12-14 07:03:00,426 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 07:03:03,601 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '11144#(and (<= 0 |ULTIMATE.start_upsweep_#in~a#1.offset|) (<= |ULTIMATE.start_main_~n~0#1| 2147483647) (<= 0 |ULTIMATE.start_upsweep_~a#1.offset|) (<= 1 |ULTIMATE.start_upsweep_#in~n#1|) (<= 0 |ULTIMATE.start_main_~a~0#1.offset|) (<= 0 |ULTIMATE.start_is_pow2_#res#1|) (= |ULTIMATE.start_upsweep_~space~0#1| 1) (<= |ULTIMATE.start_upsweep_#in~a#1.offset| 0) (= |ULTIMATE.start_main_#t~malloc16#1.offset| 0) (<= 0 (+ |ULTIMATE.start_is_pow2_#in~x#1| 2147483648)) (= (select (select |#memory_int| |ULTIMATE.start_upsweep_~a#1.base|) (+ (* 4 |ULTIMATE.start_upsweep_~left~0#1|) |ULTIMATE.start_upsweep_~a#1.offset|)) |ULTIMATE.start_upsweep_#t~mem5#1|) (= |ULTIMATE.start_upsweep_~right~0#1| (+ |ULTIMATE.start_upsweep_~space~0#1| |ULTIMATE.start_upsweep_~left~0#1|)) (<= (+ (* 4 |ULTIMATE.start_upsweep_~left~0#1|) |ULTIMATE.start_upsweep_~a#1.offset| 4) (select |#length| |ULTIMATE.start_upsweep_~a#1.base|)) (<= |ULTIMATE.start_upsweep_~a#1.offset| 0) (<= |ULTIMATE.start_is_pow2_#res#1| 1) (<= |ULTIMATE.start_upsweep_#in~n#1| 2147483647) (<= 0 (+ (* 4 |ULTIMATE.start_upsweep_~left~0#1|) |ULTIMATE.start_upsweep_~a#1.offset|)) (<= 1 |ULTIMATE.start_main_~n~0#1|) (<= 1 |ULTIMATE.start_main_~i~1#1|) (<= |ULTIMATE.start_upsweep_~n#1| 2147483647) (= (select |#valid| |ULTIMATE.start_upsweep_~a#1.base|) 1) (< |ULTIMATE.start_upsweep_~left~0#1| |ULTIMATE.start_upsweep_~n#1|) (<= 0 |ULTIMATE.start_main_~a0~0#1.offset|) (= |#NULL.offset| 0) (<= |ULTIMATE.start_is_pow2_#in~x#1| 2147483647) (= |ULTIMATE.start_main_#t~malloc15#1.offset| 0) (<= |ULTIMATE.start_main_~a0~0#1.offset| 0) (not (<= (+ (* |ULTIMATE.start_upsweep_~right~0#1| 4) |ULTIMATE.start_upsweep_~a#1.offset| 4) (select |#length| |ULTIMATE.start_upsweep_~a#1.base|))) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~a~0#1.offset| 0) (= |#NULL.base| 0))' at error location [2022-12-14 07:03:03,601 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 07:03:03,601 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 07:03:03,601 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 9, 9] total 26 [2022-12-14 07:03:03,602 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1092777416] [2022-12-14 07:03:03,602 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 07:03:03,602 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-12-14 07:03:03,602 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 07:03:03,602 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-12-14 07:03:03,602 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=195, Invalid=2061, Unknown=0, NotChecked=0, Total=2256 [2022-12-14 07:03:03,603 INFO L87 Difference]: Start difference. First operand 130 states and 166 transitions. Second operand has 26 states, 26 states have (on average 2.3846153846153846) internal successors, (62), 26 states have internal predecessors, (62), 5 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 5 states have call predecessors, (9), 5 states have call successors, (9) [2022-12-14 07:03:05,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:03:05,640 INFO L93 Difference]: Finished difference Result 260 states and 331 transitions. [2022-12-14 07:03:05,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-12-14 07:03:05,640 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.3846153846153846) internal successors, (62), 26 states have internal predecessors, (62), 5 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 5 states have call predecessors, (9), 5 states have call successors, (9) Word has length 37 [2022-12-14 07:03:05,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:03:05,641 INFO L225 Difference]: With dead ends: 260 [2022-12-14 07:03:05,641 INFO L226 Difference]: Without dead ends: 260 [2022-12-14 07:03:05,641 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 75 SyntacticMatches, 1 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1415 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=580, Invalid=4676, Unknown=0, NotChecked=0, Total=5256 [2022-12-14 07:03:05,642 INFO L413 NwaCegarLoop]: 55 mSDtfsCounter, 1102 mSDsluCounter, 512 mSDsCounter, 0 mSdLazyCounter, 1967 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1105 SdHoareTripleChecker+Valid, 567 SdHoareTripleChecker+Invalid, 1991 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 1967 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-12-14 07:03:05,642 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1105 Valid, 567 Invalid, 1991 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 1967 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-12-14 07:03:05,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2022-12-14 07:03:05,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 142. [2022-12-14 07:03:05,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 117 states have (on average 1.4102564102564104) internal successors, (165), 131 states have internal predecessors, (165), 7 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-12-14 07:03:05,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 179 transitions. [2022-12-14 07:03:05,646 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 179 transitions. Word has length 37 [2022-12-14 07:03:05,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:03:05,646 INFO L495 AbstractCegarLoop]: Abstraction has 142 states and 179 transitions. [2022-12-14 07:03:05,647 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.3846153846153846) internal successors, (62), 26 states have internal predecessors, (62), 5 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 5 states have call predecessors, (9), 5 states have call successors, (9) [2022-12-14 07:03:05,647 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 179 transitions. [2022-12-14 07:03:05,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-12-14 07:03:05,647 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:03:05,647 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 07:03:05,652 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68d1f820-b3bd-44ff-981c-6d5644e6ec24/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2022-12-14 07:03:05,848 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68d1f820-b3bd-44ff-981c-6d5644e6ec24/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-12-14 07:03:05,848 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr23REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2022-12-14 07:03:05,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:03:05,849 INFO L85 PathProgramCache]: Analyzing trace with hash 1908764945, now seen corresponding path program 1 times [2022-12-14 07:03:05,850 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 07:03:05,850 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1189669892] [2022-12-14 07:03:05,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:03:05,850 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 07:03:05,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:03:05,986 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-14 07:03:05,986 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 07:03:05,986 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1189669892] [2022-12-14 07:03:05,986 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1189669892] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 07:03:05,986 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [589719256] [2022-12-14 07:03:05,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:03:05,986 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 07:03:05,986 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68d1f820-b3bd-44ff-981c-6d5644e6ec24/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 07:03:05,987 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68d1f820-b3bd-44ff-981c-6d5644e6ec24/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 07:03:05,988 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68d1f820-b3bd-44ff-981c-6d5644e6ec24/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-12-14 07:03:06,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:03:06,059 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 8 conjunts are in the unsatisfiable core [2022-12-14 07:03:06,061 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 07:03:06,084 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-12-14 07:03:06,084 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 07:03:06,084 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [589719256] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 07:03:06,084 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 07:03:06,084 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [9] total 11 [2022-12-14 07:03:06,085 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [430535306] [2022-12-14 07:03:06,085 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 07:03:06,085 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 07:03:06,085 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 07:03:06,085 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 07:03:06,085 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2022-12-14 07:03:06,086 INFO L87 Difference]: Start difference. First operand 142 states and 179 transitions. Second operand has 6 states, 6 states have (on average 4.0) internal successors, (24), 6 states have internal predecessors, (24), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-12-14 07:03:06,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:03:06,145 INFO L93 Difference]: Finished difference Result 155 states and 189 transitions. [2022-12-14 07:03:06,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-14 07:03:06,145 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.0) internal successors, (24), 6 states have internal predecessors, (24), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 37 [2022-12-14 07:03:06,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:03:06,146 INFO L225 Difference]: With dead ends: 155 [2022-12-14 07:03:06,146 INFO L226 Difference]: Without dead ends: 155 [2022-12-14 07:03:06,146 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2022-12-14 07:03:06,146 INFO L413 NwaCegarLoop]: 57 mSDtfsCounter, 99 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 144 SdHoareTripleChecker+Invalid, 80 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 78 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 07:03:06,146 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [99 Valid, 144 Invalid, 80 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 78 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 07:03:06,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2022-12-14 07:03:06,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 144. [2022-12-14 07:03:06,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144 states, 119 states have (on average 1.403361344537815) internal successors, (167), 133 states have internal predecessors, (167), 7 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-12-14 07:03:06,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 181 transitions. [2022-12-14 07:03:06,149 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 181 transitions. Word has length 37 [2022-12-14 07:03:06,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:03:06,149 INFO L495 AbstractCegarLoop]: Abstraction has 144 states and 181 transitions. [2022-12-14 07:03:06,149 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.0) internal successors, (24), 6 states have internal predecessors, (24), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-12-14 07:03:06,149 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 181 transitions. [2022-12-14 07:03:06,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-12-14 07:03:06,149 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:03:06,149 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 07:03:06,155 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68d1f820-b3bd-44ff-981c-6d5644e6ec24/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2022-12-14 07:03:06,350 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68d1f820-b3bd-44ff-981c-6d5644e6ec24/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 07:03:06,351 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2022-12-14 07:03:06,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:03:06,351 INFO L85 PathProgramCache]: Analyzing trace with hash 1908638927, now seen corresponding path program 1 times [2022-12-14 07:03:06,352 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 07:03:06,352 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [897545224] [2022-12-14 07:03:06,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:03:06,352 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 07:03:06,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:03:06,472 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-12-14 07:03:06,472 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 07:03:06,472 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [897545224] [2022-12-14 07:03:06,473 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [897545224] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 07:03:06,473 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 07:03:06,473 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-12-14 07:03:06,473 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1727010863] [2022-12-14 07:03:06,473 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 07:03:06,473 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-12-14 07:03:06,473 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 07:03:06,474 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-12-14 07:03:06,474 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-12-14 07:03:06,474 INFO L87 Difference]: Start difference. First operand 144 states and 181 transitions. Second operand has 8 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 8 states have internal predecessors, (24), 3 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2022-12-14 07:03:06,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:03:06,602 INFO L93 Difference]: Finished difference Result 180 states and 223 transitions. [2022-12-14 07:03:06,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-14 07:03:06,603 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 8 states have internal predecessors, (24), 3 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 37 [2022-12-14 07:03:06,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:03:06,604 INFO L225 Difference]: With dead ends: 180 [2022-12-14 07:03:06,604 INFO L226 Difference]: Without dead ends: 180 [2022-12-14 07:03:06,604 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=57, Invalid=99, Unknown=0, NotChecked=0, Total=156 [2022-12-14 07:03:06,604 INFO L413 NwaCegarLoop]: 47 mSDtfsCounter, 200 mSDsluCounter, 100 mSDsCounter, 0 mSdLazyCounter, 140 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 200 SdHoareTripleChecker+Valid, 147 SdHoareTripleChecker+Invalid, 143 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 140 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 07:03:06,604 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [200 Valid, 147 Invalid, 143 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 140 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 07:03:06,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2022-12-14 07:03:06,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 149. [2022-12-14 07:03:06,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 124 states have (on average 1.403225806451613) internal successors, (174), 138 states have internal predecessors, (174), 7 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-12-14 07:03:06,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 188 transitions. [2022-12-14 07:03:06,606 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 188 transitions. Word has length 37 [2022-12-14 07:03:06,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:03:06,607 INFO L495 AbstractCegarLoop]: Abstraction has 149 states and 188 transitions. [2022-12-14 07:03:06,607 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 8 states have internal predecessors, (24), 3 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2022-12-14 07:03:06,607 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 188 transitions. [2022-12-14 07:03:06,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-12-14 07:03:06,607 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:03:06,607 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 07:03:06,607 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2022-12-14 07:03:06,607 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr32ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2022-12-14 07:03:06,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:03:06,607 INFO L85 PathProgramCache]: Analyzing trace with hash 667077887, now seen corresponding path program 1 times [2022-12-14 07:03:06,607 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 07:03:06,608 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [920457813] [2022-12-14 07:03:06,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:03:06,608 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 07:03:06,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:03:06,673 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-12-14 07:03:06,673 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 07:03:06,673 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [920457813] [2022-12-14 07:03:06,673 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [920457813] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 07:03:06,673 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 07:03:06,673 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-12-14 07:03:06,673 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2083815626] [2022-12-14 07:03:06,673 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 07:03:06,674 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-14 07:03:06,674 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 07:03:06,674 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-14 07:03:06,674 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-12-14 07:03:06,674 INFO L87 Difference]: Start difference. First operand 149 states and 188 transitions. Second operand has 7 states, 6 states have (on average 4.5) internal successors, (27), 7 states have internal predecessors, (27), 3 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2022-12-14 07:03:06,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:03:06,752 INFO L93 Difference]: Finished difference Result 148 states and 187 transitions. [2022-12-14 07:03:06,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-14 07:03:06,752 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 4.5) internal successors, (27), 7 states have internal predecessors, (27), 3 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 37 [2022-12-14 07:03:06,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:03:06,753 INFO L225 Difference]: With dead ends: 148 [2022-12-14 07:03:06,753 INFO L226 Difference]: Without dead ends: 148 [2022-12-14 07:03:06,754 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2022-12-14 07:03:06,754 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 188 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 188 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 74 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 07:03:06,754 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [188 Valid, 65 Invalid, 74 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 71 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 07:03:06,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2022-12-14 07:03:06,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 148. [2022-12-14 07:03:06,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 124 states have (on average 1.3951612903225807) internal successors, (173), 137 states have internal predecessors, (173), 7 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-12-14 07:03:06,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 187 transitions. [2022-12-14 07:03:06,758 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 187 transitions. Word has length 37 [2022-12-14 07:03:06,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:03:06,758 INFO L495 AbstractCegarLoop]: Abstraction has 148 states and 187 transitions. [2022-12-14 07:03:06,758 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 4.5) internal successors, (27), 7 states have internal predecessors, (27), 3 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2022-12-14 07:03:06,759 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 187 transitions. [2022-12-14 07:03:06,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-12-14 07:03:06,759 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:03:06,759 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 07:03:06,759 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2022-12-14 07:03:06,759 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2022-12-14 07:03:06,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:03:06,760 INFO L85 PathProgramCache]: Analyzing trace with hash -961732289, now seen corresponding path program 1 times [2022-12-14 07:03:06,760 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 07:03:06,760 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [66073433] [2022-12-14 07:03:06,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:03:06,760 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 07:03:06,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:03:06,841 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-12-14 07:03:06,841 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 07:03:06,841 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [66073433] [2022-12-14 07:03:06,841 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [66073433] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 07:03:06,841 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 07:03:06,841 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-12-14 07:03:06,841 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1364297002] [2022-12-14 07:03:06,842 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 07:03:06,842 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-12-14 07:03:06,842 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 07:03:06,842 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-12-14 07:03:06,842 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2022-12-14 07:03:06,842 INFO L87 Difference]: Start difference. First operand 148 states and 187 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 3 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2022-12-14 07:03:06,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:03:06,976 INFO L93 Difference]: Finished difference Result 197 states and 246 transitions. [2022-12-14 07:03:06,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-12-14 07:03:06,976 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 3 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 38 [2022-12-14 07:03:06,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:03:06,978 INFO L225 Difference]: With dead ends: 197 [2022-12-14 07:03:06,978 INFO L226 Difference]: Without dead ends: 197 [2022-12-14 07:03:06,978 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=88, Invalid=152, Unknown=0, NotChecked=0, Total=240 [2022-12-14 07:03:06,978 INFO L413 NwaCegarLoop]: 49 mSDtfsCounter, 204 mSDsluCounter, 103 mSDsCounter, 0 mSdLazyCounter, 104 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 204 SdHoareTripleChecker+Valid, 152 SdHoareTripleChecker+Invalid, 108 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 104 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 07:03:06,978 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [204 Valid, 152 Invalid, 108 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 104 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 07:03:06,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2022-12-14 07:03:06,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 146. [2022-12-14 07:03:06,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 124 states have (on average 1.3709677419354838) internal successors, (170), 135 states have internal predecessors, (170), 7 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-12-14 07:03:06,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 184 transitions. [2022-12-14 07:03:06,981 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 184 transitions. Word has length 38 [2022-12-14 07:03:06,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:03:06,982 INFO L495 AbstractCegarLoop]: Abstraction has 146 states and 184 transitions. [2022-12-14 07:03:06,982 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 3 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2022-12-14 07:03:06,982 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 184 transitions. [2022-12-14 07:03:06,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-12-14 07:03:06,982 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:03:06,982 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 07:03:06,982 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2022-12-14 07:03:06,982 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr33ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2022-12-14 07:03:06,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:03:06,983 INFO L85 PathProgramCache]: Analyzing trace with hash -795421777, now seen corresponding path program 1 times [2022-12-14 07:03:06,983 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 07:03:06,983 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1458030020] [2022-12-14 07:03:06,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:03:06,983 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 07:03:06,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:03:07,108 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-14 07:03:07,108 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 07:03:07,108 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1458030020] [2022-12-14 07:03:07,109 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1458030020] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 07:03:07,109 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 07:03:07,109 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-12-14 07:03:07,109 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1001101909] [2022-12-14 07:03:07,109 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 07:03:07,109 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-14 07:03:07,109 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 07:03:07,110 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-14 07:03:07,110 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-12-14 07:03:07,110 INFO L87 Difference]: Start difference. First operand 146 states and 184 transitions. Second operand has 7 states, 6 states have (on average 4.666666666666667) internal successors, (28), 7 states have internal predecessors, (28), 3 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2022-12-14 07:03:07,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:03:07,230 INFO L93 Difference]: Finished difference Result 145 states and 183 transitions. [2022-12-14 07:03:07,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-14 07:03:07,230 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 4.666666666666667) internal successors, (28), 7 states have internal predecessors, (28), 3 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 38 [2022-12-14 07:03:07,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:03:07,231 INFO L225 Difference]: With dead ends: 145 [2022-12-14 07:03:07,231 INFO L226 Difference]: Without dead ends: 117 [2022-12-14 07:03:07,232 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2022-12-14 07:03:07,232 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 73 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 168 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 97 SdHoareTripleChecker+Invalid, 173 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 168 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 07:03:07,232 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [73 Valid, 97 Invalid, 173 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 168 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 07:03:07,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2022-12-14 07:03:07,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 117. [2022-12-14 07:03:07,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 100 states have (on average 1.42) internal successors, (142), 110 states have internal predecessors, (142), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-12-14 07:03:07,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 150 transitions. [2022-12-14 07:03:07,234 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 150 transitions. Word has length 38 [2022-12-14 07:03:07,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:03:07,234 INFO L495 AbstractCegarLoop]: Abstraction has 117 states and 150 transitions. [2022-12-14 07:03:07,234 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 4.666666666666667) internal successors, (28), 7 states have internal predecessors, (28), 3 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2022-12-14 07:03:07,234 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 150 transitions. [2022-12-14 07:03:07,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-12-14 07:03:07,235 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:03:07,235 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 07:03:07,235 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2022-12-14 07:03:07,235 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr23REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2022-12-14 07:03:07,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:03:07,235 INFO L85 PathProgramCache]: Analyzing trace with hash 254576819, now seen corresponding path program 1 times [2022-12-14 07:03:07,235 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 07:03:07,235 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [589956601] [2022-12-14 07:03:07,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:03:07,235 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 07:03:07,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:03:07,337 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-14 07:03:07,337 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 07:03:07,337 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [589956601] [2022-12-14 07:03:07,337 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [589956601] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 07:03:07,337 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1918328773] [2022-12-14 07:03:07,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:03:07,338 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 07:03:07,338 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68d1f820-b3bd-44ff-981c-6d5644e6ec24/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 07:03:07,338 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68d1f820-b3bd-44ff-981c-6d5644e6ec24/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 07:03:07,339 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68d1f820-b3bd-44ff-981c-6d5644e6ec24/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-12-14 07:03:07,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:03:07,411 INFO L263 TraceCheckSpWp]: Trace formula consists of 270 conjuncts, 10 conjunts are in the unsatisfiable core [2022-12-14 07:03:07,412 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 07:03:07,448 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-12-14 07:03:07,448 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 07:03:07,524 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-12-14 07:03:07,524 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1918328773] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 07:03:07,524 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1777234784] [2022-12-14 07:03:07,525 INFO L159 IcfgInterpreter]: Started Sifa with 28 locations of interest [2022-12-14 07:03:07,525 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 07:03:07,525 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 07:03:07,526 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 07:03:07,526 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 07:03:07,716 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 10 treesize of output 9 [2022-12-14 07:03:07,720 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-12-14 07:03:07,751 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 6 [2022-12-14 07:03:07,814 INFO L321 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2022-12-14 07:03:07,815 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 127 treesize of output 127 [2022-12-14 07:03:07,833 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-12-14 07:03:07,833 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 128 treesize of output 130 [2022-12-14 07:03:07,902 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 6 treesize of output 4 [2022-12-14 07:03:07,911 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-12-14 07:03:07,988 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 6 treesize of output 4 [2022-12-14 07:03:07,997 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-12-14 07:03:08,039 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 30 [2022-12-14 07:03:08,119 INFO L321 Elim1Store]: treesize reduction 84, result has 9.7 percent of original size [2022-12-14 07:03:08,119 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 272 treesize of output 269 [2022-12-14 07:03:08,185 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:03:08,194 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 07:03:08,194 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 25 treesize of output 25 [2022-12-14 07:03:08,212 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:03:08,220 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 07:03:08,221 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 25 treesize of output 25 [2022-12-14 07:03:08,416 INFO L321 Elim1Store]: treesize reduction 76, result has 31.5 percent of original size [2022-12-14 07:03:08,417 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 285 treesize of output 306 [2022-12-14 07:03:08,541 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-12-14 07:03:08,564 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:03:08,566 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:03:08,587 INFO L321 Elim1Store]: treesize reduction 28, result has 60.6 percent of original size [2022-12-14 07:03:08,588 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 2 case distinctions, treesize of input 49 treesize of output 82 [2022-12-14 07:03:08,622 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-12-14 07:03:08,647 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:03:08,648 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:03:08,650 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:03:08,678 INFO L321 Elim1Store]: treesize reduction 28, result has 60.6 percent of original size [2022-12-14 07:03:08,678 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 47 treesize of output 70 [2022-12-14 07:03:08,782 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:03:08,783 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 0 case distinctions, treesize of input 36 treesize of output 28 [2022-12-14 07:03:08,830 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:03:08,831 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 0 case distinctions, treesize of input 36 treesize of output 28 [2022-12-14 07:03:08,889 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 07:03:09,079 INFO L197 IcfgInterpreter]: Interpreting procedure #Ultimate.meminit with input of size 70 for LOIs [2022-12-14 07:03:09,099 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 8 for LOIs [2022-12-14 07:03:09,099 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 07:03:13,555 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '13584#(and (<= 0 |ULTIMATE.start_upsweep_#in~a#1.offset|) (<= |ULTIMATE.start_main_~n~0#1| 2147483647) (<= 0 |ULTIMATE.start_upsweep_~a#1.offset|) (= |ULTIMATE.start_check_~a#1.offset| |ULTIMATE.start_check_#in~a#1.offset|) (= |ULTIMATE.start_check_#in~n#1| |ULTIMATE.start_check_~n#1|) (< |ULTIMATE.start_check_~i~0#1| |ULTIMATE.start_check_~n#1|) (<= 0 (+ |ULTIMATE.start_downsweep_~n#1| 2147483648)) (<= 0 (+ |ULTIMATE.start_downsweep_#in~n#1| 2147483648)) (= |ULTIMATE.start_check_#in~a#1.base| |ULTIMATE.start_main_~a~0#1.base|) (<= 0 |ULTIMATE.start_main_~a~0#1.offset|) (<= 0 |ULTIMATE.start_is_pow2_#res#1|) (= |ULTIMATE.start_check_#in~a0#1.base| |ULTIMATE.start_check_~a0#1.base|) (<= 0 |ULTIMATE.start_main_~i~1#1|) (<= |ULTIMATE.start_upsweep_#in~a#1.offset| 0) (<= |ULTIMATE.start_downsweep_~n#1| 2147483647) (not (< 0 |ULTIMATE.start_downsweep_~space#1|)) (<= 0 |ULTIMATE.start_downsweep_~a#1.offset|) (= |ULTIMATE.start_main_#t~malloc16#1.offset| 0) (<= |ULTIMATE.start_upsweep_#res#1| 2147483647) (<= 0 (+ |ULTIMATE.start_is_pow2_#in~x#1| 2147483648)) (<= 0 (+ |ULTIMATE.start_upsweep_#res#1| 2147483648)) (= |ULTIMATE.start_check_~sum~0#1| 0) (= |ULTIMATE.start_main_~a0~0#1.base| |ULTIMATE.start_check_#in~a0#1.base|) (= |ULTIMATE.start_check_~i~0#1| 0) (<= 0 (+ |ULTIMATE.start_upsweep_~n#1| 2147483648)) (<= 0 |ULTIMATE.start_downsweep_#in~a#1.offset|) (not (<= (+ |ULTIMATE.start_check_~a#1.offset| (* |ULTIMATE.start_check_~i~0#1| 4) 4) (select |#length| |ULTIMATE.start_check_~a#1.base|))) (<= 0 (+ |ULTIMATE.start_downsweep_#in~space#1| 2147483648)) (= |ULTIMATE.start_main_~a~0#1.offset| |ULTIMATE.start_check_#in~a#1.offset|) (<= |ULTIMATE.start_downsweep_#in~space#1| 2147483647) (<= |ULTIMATE.start_upsweep_~a#1.offset| 0) (= |ULTIMATE.start_main_~n~0#1| |ULTIMATE.start_check_#in~n#1|) (<= |ULTIMATE.start_is_pow2_#res#1| 1) (<= 0 (+ 2147483648 |ULTIMATE.start_main_~space~1#1|)) (<= |ULTIMATE.start_downsweep_~a#1.offset| 0) (<= 0 (+ |ULTIMATE.start_upsweep_#in~n#1| 2147483648)) (<= |ULTIMATE.start_upsweep_#in~n#1| 2147483647) (<= 0 (+ |ULTIMATE.start_upsweep_~space~0#1| 2147483648)) (<= |ULTIMATE.start_upsweep_~n#1| 2147483647) (<= |ULTIMATE.start_main_#t~malloc15#1.offset| 0) (<= |ULTIMATE.start_upsweep_~space~0#1| 2147483647) (<= |ULTIMATE.start_downsweep_#in~n#1| 2147483647) (<= 0 |ULTIMATE.start_main_~a0~0#1.offset|) (= |#NULL.offset| 0) (<= |ULTIMATE.start_is_pow2_#in~x#1| 2147483647) (<= |ULTIMATE.start_downsweep_#in~a#1.offset| 0) (= |ULTIMATE.start_check_#in~a0#1.offset| |ULTIMATE.start_main_~a0~0#1.offset|) (= |ULTIMATE.start_check_~a#1.base| |ULTIMATE.start_check_#in~a#1.base|) (<= |ULTIMATE.start_main_~space~1#1| 2147483647) (<= |ULTIMATE.start_main_~a0~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_#t~malloc15#1.offset|) (<= 0 |#StackHeapBarrier|) (= |ULTIMATE.start_check_#in~a0#1.offset| |ULTIMATE.start_check_~a0#1.offset|) (<= |ULTIMATE.start_main_~a~0#1.offset| 0) (= |#NULL.base| 0))' at error location [2022-12-14 07:03:13,555 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 07:03:13,555 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 07:03:13,555 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 12 [2022-12-14 07:03:13,555 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [982275930] [2022-12-14 07:03:13,555 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 07:03:13,556 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-12-14 07:03:13,556 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 07:03:13,556 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-12-14 07:03:13,556 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=184, Invalid=1298, Unknown=0, NotChecked=0, Total=1482 [2022-12-14 07:03:13,556 INFO L87 Difference]: Start difference. First operand 117 states and 150 transitions. Second operand has 12 states, 12 states have (on average 3.25) internal successors, (39), 12 states have internal predecessors, (39), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-12-14 07:03:13,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:03:13,725 INFO L93 Difference]: Finished difference Result 109 states and 134 transitions. [2022-12-14 07:03:13,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-12-14 07:03:13,725 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.25) internal successors, (39), 12 states have internal predecessors, (39), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 39 [2022-12-14 07:03:13,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:03:13,726 INFO L225 Difference]: With dead ends: 109 [2022-12-14 07:03:13,726 INFO L226 Difference]: Without dead ends: 109 [2022-12-14 07:03:13,726 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 83 SyntacticMatches, 5 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 406 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=231, Invalid=1661, Unknown=0, NotChecked=0, Total=1892 [2022-12-14 07:03:13,726 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 138 mSDsluCounter, 190 mSDsCounter, 0 mSdLazyCounter, 213 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 138 SdHoareTripleChecker+Valid, 221 SdHoareTripleChecker+Invalid, 215 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 213 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 07:03:13,726 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [138 Valid, 221 Invalid, 215 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 213 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 07:03:13,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2022-12-14 07:03:13,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 96. [2022-12-14 07:03:13,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 79 states have (on average 1.3417721518987342) internal successors, (106), 89 states have internal predecessors, (106), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-12-14 07:03:13,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 114 transitions. [2022-12-14 07:03:13,728 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 114 transitions. Word has length 39 [2022-12-14 07:03:13,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:03:13,728 INFO L495 AbstractCegarLoop]: Abstraction has 96 states and 114 transitions. [2022-12-14 07:03:13,728 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.25) internal successors, (39), 12 states have internal predecessors, (39), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-12-14 07:03:13,728 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 114 transitions. [2022-12-14 07:03:13,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-12-14 07:03:13,729 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:03:13,729 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 07:03:13,733 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68d1f820-b3bd-44ff-981c-6d5644e6ec24/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2022-12-14 07:03:13,929 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68d1f820-b3bd-44ff-981c-6d5644e6ec24/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2022-12-14 07:03:13,929 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2022-12-14 07:03:13,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:03:13,930 INFO L85 PathProgramCache]: Analyzing trace with hash 1750176267, now seen corresponding path program 1 times [2022-12-14 07:03:13,930 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 07:03:13,930 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [300711890] [2022-12-14 07:03:13,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:03:13,930 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 07:03:13,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:03:13,980 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-12-14 07:03:13,980 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 07:03:13,980 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [300711890] [2022-12-14 07:03:13,980 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [300711890] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 07:03:13,980 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1961879632] [2022-12-14 07:03:13,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:03:13,980 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 07:03:13,980 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68d1f820-b3bd-44ff-981c-6d5644e6ec24/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 07:03:13,981 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68d1f820-b3bd-44ff-981c-6d5644e6ec24/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 07:03:13,982 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68d1f820-b3bd-44ff-981c-6d5644e6ec24/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-12-14 07:03:14,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:03:14,064 INFO L263 TraceCheckSpWp]: Trace formula consists of 251 conjuncts, 11 conjunts are in the unsatisfiable core [2022-12-14 07:03:14,065 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 07:03:14,131 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 17 proven. 11 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-12-14 07:03:14,131 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 07:03:14,202 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 17 proven. 11 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-12-14 07:03:14,202 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1961879632] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 07:03:14,203 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [855413320] [2022-12-14 07:03:14,204 INFO L159 IcfgInterpreter]: Started Sifa with 23 locations of interest [2022-12-14 07:03:14,204 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 07:03:14,204 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 07:03:14,204 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 07:03:14,204 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 07:03:14,356 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-12-14 07:03:14,365 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 10 treesize of output 9 [2022-12-14 07:03:14,388 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 6 [2022-12-14 07:03:14,447 INFO L321 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2022-12-14 07:03:14,448 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 127 treesize of output 127 [2022-12-14 07:03:14,467 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-12-14 07:03:14,468 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 128 treesize of output 130 [2022-12-14 07:03:14,546 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 6 treesize of output 4 [2022-12-14 07:03:14,555 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-12-14 07:03:14,648 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 6 treesize of output 4 [2022-12-14 07:03:14,658 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-12-14 07:03:14,734 INFO L321 Elim1Store]: treesize reduction 38, result has 11.6 percent of original size [2022-12-14 07:03:14,734 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 210 treesize of output 206 [2022-12-14 07:03:14,792 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:03:14,802 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 07:03:14,802 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 25 treesize of output 25 [2022-12-14 07:03:14,832 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:03:14,843 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 07:03:14,843 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 07:03:14,863 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:03:14,873 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 07:03:14,873 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 25 treesize of output 25 [2022-12-14 07:03:14,944 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:03:14,945 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 0 case distinctions, treesize of input 36 treesize of output 28 [2022-12-14 07:03:14,999 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:03:15,000 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 28 [2022-12-14 07:03:15,088 INFO L321 Elim1Store]: treesize reduction 29, result has 59.7 percent of original size [2022-12-14 07:03:15,089 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 36 treesize of output 56 [2022-12-14 07:03:15,245 INFO L197 IcfgInterpreter]: Interpreting procedure #Ultimate.meminit with input of size 70 for LOIs [2022-12-14 07:03:15,268 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 8 for LOIs [2022-12-14 07:03:15,269 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 07:03:18,154 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '14091#(and (<= 0 |ULTIMATE.start_upsweep_#in~a#1.offset|) (<= |ULTIMATE.start_main_~n~0#1| 2147483647) (<= 0 |ULTIMATE.start_upsweep_~a#1.offset|) (<= 1 |ULTIMATE.start_upsweep_#in~n#1|) (<= 0 |ULTIMATE.start_main_~a~0#1.offset|) (<= 0 |ULTIMATE.start_is_pow2_#res#1|) (<= |ULTIMATE.start_upsweep_#in~a#1.offset| 0) (= |ULTIMATE.start_main_#t~malloc16#1.offset| 0) (<= 0 (+ |ULTIMATE.start_is_pow2_#in~x#1| 2147483648)) (= (select (select |#memory_int| |ULTIMATE.start_upsweep_~a#1.base|) (+ (* 4 |ULTIMATE.start_upsweep_~left~0#1|) |ULTIMATE.start_upsweep_~a#1.offset|)) |ULTIMATE.start_upsweep_#t~mem5#1|) (= |ULTIMATE.start_upsweep_~right~0#1| (+ |ULTIMATE.start_upsweep_~space~0#1| |ULTIMATE.start_upsweep_~left~0#1|)) (<= (+ (* 4 |ULTIMATE.start_upsweep_~left~0#1|) |ULTIMATE.start_upsweep_~a#1.offset| 4) (select |#length| |ULTIMATE.start_upsweep_~a#1.base|)) (<= |ULTIMATE.start_upsweep_~a#1.offset| 0) (<= |ULTIMATE.start_is_pow2_#res#1| 1) (<= |ULTIMATE.start_upsweep_#in~n#1| 2147483647) (<= 0 (+ (* 4 |ULTIMATE.start_upsweep_~left~0#1|) |ULTIMATE.start_upsweep_~a#1.offset|)) (<= 1 |ULTIMATE.start_main_~n~0#1|) (<= 1 |ULTIMATE.start_main_~i~1#1|) (<= |ULTIMATE.start_upsweep_~n#1| 2147483647) (= (select |#valid| |ULTIMATE.start_upsweep_~a#1.base|) 1) (<= |ULTIMATE.start_main_#t~malloc15#1.offset| 0) (< |ULTIMATE.start_upsweep_~left~0#1| |ULTIMATE.start_upsweep_~n#1|) (<= 0 |ULTIMATE.start_main_~a0~0#1.offset|) (= |#NULL.offset| 0) (<= |ULTIMATE.start_is_pow2_#in~x#1| 2147483647) (<= |ULTIMATE.start_main_~a0~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_#t~malloc15#1.offset|) (or (not (<= (+ (* |ULTIMATE.start_upsweep_~right~0#1| 4) |ULTIMATE.start_upsweep_~a#1.offset| 4) (select |#length| |ULTIMATE.start_upsweep_~a#1.base|))) (not (<= 0 (+ (* |ULTIMATE.start_upsweep_~right~0#1| 4) |ULTIMATE.start_upsweep_~a#1.offset|)))) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~a~0#1.offset| 0) (= |#NULL.base| 0))' at error location [2022-12-14 07:03:18,154 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 07:03:18,154 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 07:03:18,154 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 10, 10] total 19 [2022-12-14 07:03:18,154 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [928958359] [2022-12-14 07:03:18,154 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 07:03:18,155 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-12-14 07:03:18,155 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 07:03:18,155 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-12-14 07:03:18,155 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=197, Invalid=1443, Unknown=0, NotChecked=0, Total=1640 [2022-12-14 07:03:18,156 INFO L87 Difference]: Start difference. First operand 96 states and 114 transitions. Second operand has 19 states, 19 states have (on average 3.0526315789473686) internal successors, (58), 19 states have internal predecessors, (58), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-12-14 07:03:18,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:03:18,471 INFO L93 Difference]: Finished difference Result 136 states and 159 transitions. [2022-12-14 07:03:18,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-12-14 07:03:18,472 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.0526315789473686) internal successors, (58), 19 states have internal predecessors, (58), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 42 [2022-12-14 07:03:18,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:03:18,472 INFO L225 Difference]: With dead ends: 136 [2022-12-14 07:03:18,472 INFO L226 Difference]: Without dead ends: 136 [2022-12-14 07:03:18,472 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 89 SyntacticMatches, 3 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 824 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=372, Invalid=2490, Unknown=0, NotChecked=0, Total=2862 [2022-12-14 07:03:18,473 INFO L413 NwaCegarLoop]: 51 mSDtfsCounter, 310 mSDsluCounter, 362 mSDsCounter, 0 mSdLazyCounter, 406 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 310 SdHoareTripleChecker+Valid, 413 SdHoareTripleChecker+Invalid, 411 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 406 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 07:03:18,473 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [310 Valid, 413 Invalid, 411 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 406 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 07:03:18,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2022-12-14 07:03:18,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 95. [2022-12-14 07:03:18,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 78 states have (on average 1.3076923076923077) internal successors, (102), 88 states have internal predecessors, (102), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-12-14 07:03:18,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 110 transitions. [2022-12-14 07:03:18,474 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 110 transitions. Word has length 42 [2022-12-14 07:03:18,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:03:18,475 INFO L495 AbstractCegarLoop]: Abstraction has 95 states and 110 transitions. [2022-12-14 07:03:18,475 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.0526315789473686) internal successors, (58), 19 states have internal predecessors, (58), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-12-14 07:03:18,475 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 110 transitions. [2022-12-14 07:03:18,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-12-14 07:03:18,475 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:03:18,475 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 07:03:18,479 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68d1f820-b3bd-44ff-981c-6d5644e6ec24/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2022-12-14 07:03:18,676 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68d1f820-b3bd-44ff-981c-6d5644e6ec24/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2022-12-14 07:03:18,677 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2022-12-14 07:03:18,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:03:18,678 INFO L85 PathProgramCache]: Analyzing trace with hash 469657177, now seen corresponding path program 1 times [2022-12-14 07:03:18,678 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 07:03:18,678 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [816508226] [2022-12-14 07:03:18,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:03:18,679 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 07:03:18,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:03:18,815 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-14 07:03:18,815 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 07:03:18,815 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [816508226] [2022-12-14 07:03:18,815 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [816508226] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 07:03:18,815 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [598919105] [2022-12-14 07:03:18,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:03:18,816 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 07:03:18,816 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68d1f820-b3bd-44ff-981c-6d5644e6ec24/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 07:03:18,816 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68d1f820-b3bd-44ff-981c-6d5644e6ec24/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 07:03:18,817 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68d1f820-b3bd-44ff-981c-6d5644e6ec24/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-12-14 07:03:18,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:03:18,911 INFO L263 TraceCheckSpWp]: Trace formula consists of 283 conjuncts, 10 conjunts are in the unsatisfiable core [2022-12-14 07:03:18,912 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 07:03:18,982 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-12-14 07:03:18,982 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 07:03:19,053 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-12-14 07:03:19,053 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [598919105] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 07:03:19,053 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1350008990] [2022-12-14 07:03:19,055 INFO L159 IcfgInterpreter]: Started Sifa with 31 locations of interest [2022-12-14 07:03:19,055 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 07:03:19,055 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 07:03:19,055 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 07:03:19,055 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 07:03:19,276 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 10 treesize of output 9 [2022-12-14 07:03:19,281 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-12-14 07:03:19,308 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 6 [2022-12-14 07:03:19,372 INFO L321 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2022-12-14 07:03:19,373 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 127 treesize of output 127 [2022-12-14 07:03:19,393 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-12-14 07:03:19,394 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 128 treesize of output 130 [2022-12-14 07:03:19,451 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 6 treesize of output 4 [2022-12-14 07:03:19,458 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-12-14 07:03:19,514 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 6 treesize of output 4 [2022-12-14 07:03:19,522 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-12-14 07:03:19,593 INFO L321 Elim1Store]: treesize reduction 28, result has 15.2 percent of original size [2022-12-14 07:03:19,593 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 200 treesize of output 196 [2022-12-14 07:03:19,637 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:03:19,646 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 07:03:19,647 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 25 treesize of output 25 [2022-12-14 07:03:19,663 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:03:19,672 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 07:03:19,673 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 25 treesize of output 25 [2022-12-14 07:03:19,737 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:03:19,738 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 0 case distinctions, treesize of input 36 treesize of output 28 [2022-12-14 07:03:19,785 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:03:19,786 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 0 case distinctions, treesize of input 36 treesize of output 28 [2022-12-14 07:03:19,830 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:03:19,830 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 0 case distinctions, treesize of input 36 treesize of output 28 [2022-12-14 07:03:19,893 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 07:03:19,978 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:03:19,979 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:03:20,008 INFO L321 Elim1Store]: treesize reduction 25, result has 59.7 percent of original size [2022-12-14 07:03:20,009 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 2 case distinctions, treesize of input 57 treesize of output 67 [2022-12-14 07:03:20,056 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:03:20,057 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:03:20,064 INFO L321 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2022-12-14 07:03:20,064 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 1 case distinctions, treesize of input 65 treesize of output 59 [2022-12-14 07:03:20,171 INFO L321 Elim1Store]: treesize reduction 22, result has 59.3 percent of original size [2022-12-14 07:03:20,171 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 33 treesize of output 45 [2022-12-14 07:03:20,228 INFO L321 Elim1Store]: treesize reduction 27, result has 61.4 percent of original size [2022-12-14 07:03:20,228 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 69 treesize of output 77 [2022-12-14 07:03:20,319 INFO L321 Elim1Store]: treesize reduction 22, result has 59.3 percent of original size [2022-12-14 07:03:20,319 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 33 treesize of output 45 [2022-12-14 07:03:20,374 INFO L321 Elim1Store]: treesize reduction 27, result has 61.4 percent of original size [2022-12-14 07:03:20,375 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 69 treesize of output 77 [2022-12-14 07:03:20,518 INFO L197 IcfgInterpreter]: Interpreting procedure #Ultimate.meminit with input of size 70 for LOIs [2022-12-14 07:03:20,535 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 8 for LOIs [2022-12-14 07:03:20,535 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 07:03:24,790 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '14641#(and (<= 0 |ULTIMATE.start_upsweep_#in~a#1.offset|) (<= |ULTIMATE.start_main_~n~0#1| 2147483647) (<= 0 |ULTIMATE.start_upsweep_~a#1.offset|) (<= 0 (+ |ULTIMATE.start_main_~n~0#1| 1)) (<= 0 |ULTIMATE.start_main_~a~0#1.offset|) (<= |ULTIMATE.start_downsweep_~left~1#1| 2147483647) (<= 0 |ULTIMATE.start_is_pow2_#res#1|) (<= 0 |ULTIMATE.start_main_~i~1#1|) (or (not (<= (+ |ULTIMATE.start_downsweep_~a#1.offset| 4 (* |ULTIMATE.start_downsweep_~right~1#1| 4)) (select |#length| |ULTIMATE.start_downsweep_~a#1.base|))) (not (<= 0 (+ |ULTIMATE.start_downsweep_~a#1.offset| (* |ULTIMATE.start_downsweep_~right~1#1| 4))))) (<= |ULTIMATE.start_upsweep_#in~a#1.offset| 0) (<= 0 (+ |ULTIMATE.start_downsweep_~n#1| 1)) (<= |ULTIMATE.start_downsweep_~n#1| 2147483647) (<= 0 (+ |ULTIMATE.start_downsweep_#in~n#1| 1)) (<= 0 |ULTIMATE.start_downsweep_~a#1.offset|) (= |ULTIMATE.start_main_#t~malloc16#1.offset| 0) (<= |ULTIMATE.start_upsweep_#res#1| 2147483647) (<= 0 (+ |ULTIMATE.start_is_pow2_#in~x#1| 2147483648)) (<= 0 (+ |ULTIMATE.start_upsweep_#res#1| 2147483648)) (<= 0 (+ |ULTIMATE.start_downsweep_~right~1#1| 1)) (<= 0 (+ |ULTIMATE.start_upsweep_~n#1| 2147483648)) (<= 0 |ULTIMATE.start_downsweep_#in~a#1.offset|) (<= |ULTIMATE.start_downsweep_~right~1#1| 2147483647) (<= 0 (+ |ULTIMATE.start_downsweep_#in~space#1| 2147483648)) (<= |ULTIMATE.start_downsweep_#in~space#1| 2147483647) (<= |ULTIMATE.start_upsweep_~a#1.offset| 0) (<= |ULTIMATE.start_is_pow2_#res#1| 1) (<= 0 (+ 2147483648 |ULTIMATE.start_main_~space~1#1|)) (<= |ULTIMATE.start_downsweep_~a#1.offset| 0) (<= 0 (+ |ULTIMATE.start_upsweep_#in~n#1| 2147483648)) (<= |ULTIMATE.start_upsweep_#in~n#1| 2147483647) (<= 0 (+ |ULTIMATE.start_upsweep_~space~0#1| 2147483648)) (<= |ULTIMATE.start_upsweep_~n#1| 2147483647) (<= |ULTIMATE.start_upsweep_~space~0#1| 2147483647) (<= |ULTIMATE.start_downsweep_#in~n#1| 2147483647) (<= 0 |ULTIMATE.start_main_~a0~0#1.offset|) (= |#NULL.offset| 0) (<= |ULTIMATE.start_is_pow2_#in~x#1| 2147483647) (<= |ULTIMATE.start_downsweep_#in~a#1.offset| 0) (= |ULTIMATE.start_main_#t~malloc15#1.offset| 0) (<= |ULTIMATE.start_main_~space~1#1| 2147483647) (<= |ULTIMATE.start_main_~a0~0#1.offset| 0) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~a~0#1.offset| 0) (<= 0 |ULTIMATE.start_downsweep_~space#1|) (= |#NULL.base| 0))' at error location [2022-12-14 07:03:24,790 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 07:03:24,790 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 07:03:24,790 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 18 [2022-12-14 07:03:24,790 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [935455402] [2022-12-14 07:03:24,790 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 07:03:24,791 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-12-14 07:03:24,791 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 07:03:24,791 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-12-14 07:03:24,791 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=218, Invalid=1944, Unknown=0, NotChecked=0, Total=2162 [2022-12-14 07:03:24,792 INFO L87 Difference]: Start difference. First operand 95 states and 110 transitions. Second operand has 18 states, 18 states have (on average 3.7777777777777777) internal successors, (68), 18 states have internal predecessors, (68), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-12-14 07:03:24,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:03:24,971 INFO L93 Difference]: Finished difference Result 125 states and 146 transitions. [2022-12-14 07:03:24,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-12-14 07:03:24,972 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.7777777777777777) internal successors, (68), 18 states have internal predecessors, (68), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 43 [2022-12-14 07:03:24,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:03:24,972 INFO L225 Difference]: With dead ends: 125 [2022-12-14 07:03:24,972 INFO L226 Difference]: Without dead ends: 125 [2022-12-14 07:03:24,973 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 91 SyntacticMatches, 2 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 765 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=293, Invalid=2463, Unknown=0, NotChecked=0, Total=2756 [2022-12-14 07:03:24,973 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 160 mSDsluCounter, 338 mSDsCounter, 0 mSdLazyCounter, 323 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 160 SdHoareTripleChecker+Valid, 372 SdHoareTripleChecker+Invalid, 330 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 323 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 07:03:24,973 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [160 Valid, 372 Invalid, 330 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 323 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 07:03:24,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2022-12-14 07:03:24,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 105. [2022-12-14 07:03:24,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 88 states have (on average 1.2954545454545454) internal successors, (114), 98 states have internal predecessors, (114), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-12-14 07:03:24,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 122 transitions. [2022-12-14 07:03:24,975 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 122 transitions. Word has length 43 [2022-12-14 07:03:24,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:03:24,975 INFO L495 AbstractCegarLoop]: Abstraction has 105 states and 122 transitions. [2022-12-14 07:03:24,975 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.7777777777777777) internal successors, (68), 18 states have internal predecessors, (68), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-12-14 07:03:24,975 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 122 transitions. [2022-12-14 07:03:24,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-12-14 07:03:24,976 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:03:24,976 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 07:03:24,980 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68d1f820-b3bd-44ff-981c-6d5644e6ec24/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2022-12-14 07:03:25,176 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68d1f820-b3bd-44ff-981c-6d5644e6ec24/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2022-12-14 07:03:25,177 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2022-12-14 07:03:25,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:03:25,177 INFO L85 PathProgramCache]: Analyzing trace with hash -650129062, now seen corresponding path program 2 times [2022-12-14 07:03:25,177 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 07:03:25,177 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [877095179] [2022-12-14 07:03:25,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:03:25,178 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 07:03:25,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:03:25,304 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 10 proven. 23 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-14 07:03:25,304 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 07:03:25,304 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [877095179] [2022-12-14 07:03:25,305 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [877095179] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 07:03:25,305 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1968140218] [2022-12-14 07:03:25,305 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 07:03:25,305 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 07:03:25,305 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68d1f820-b3bd-44ff-981c-6d5644e6ec24/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 07:03:25,306 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68d1f820-b3bd-44ff-981c-6d5644e6ec24/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 07:03:25,306 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68d1f820-b3bd-44ff-981c-6d5644e6ec24/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-12-14 07:03:25,404 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-12-14 07:03:25,404 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 07:03:25,406 INFO L263 TraceCheckSpWp]: Trace formula consists of 236 conjuncts, 33 conjunts are in the unsatisfiable core [2022-12-14 07:03:25,407 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 07:03:25,649 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 7 proven. 11 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-12-14 07:03:25,649 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 07:03:25,906 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 [2022-12-14 07:03:25,983 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 1 proven. 17 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-12-14 07:03:25,983 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1968140218] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 07:03:25,983 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1604799222] [2022-12-14 07:03:25,984 INFO L159 IcfgInterpreter]: Started Sifa with 23 locations of interest [2022-12-14 07:03:25,984 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 07:03:25,984 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 07:03:25,984 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 07:03:25,984 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 07:03:26,190 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-12-14 07:03:26,193 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 10 treesize of output 9 [2022-12-14 07:03:26,220 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 6 [2022-12-14 07:03:26,286 INFO L321 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2022-12-14 07:03:26,286 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 127 treesize of output 127 [2022-12-14 07:03:26,302 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-12-14 07:03:26,302 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 128 treesize of output 130 [2022-12-14 07:03:26,361 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 6 treesize of output 4 [2022-12-14 07:03:26,367 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-12-14 07:03:26,428 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 6 treesize of output 4 [2022-12-14 07:03:26,435 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-12-14 07:03:26,503 INFO L321 Elim1Store]: treesize reduction 28, result has 15.2 percent of original size [2022-12-14 07:03:26,503 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 200 treesize of output 196 [2022-12-14 07:03:26,540 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:03:26,547 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 07:03:26,548 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 25 treesize of output 25 [2022-12-14 07:03:26,563 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:03:26,571 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 07:03:26,571 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 25 treesize of output 25 [2022-12-14 07:03:26,622 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:03:26,622 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 0 case distinctions, treesize of input 36 treesize of output 28 [2022-12-14 07:03:26,661 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:03:26,661 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 0 case distinctions, treesize of input 36 treesize of output 28 [2022-12-14 07:03:26,755 INFO L197 IcfgInterpreter]: Interpreting procedure #Ultimate.meminit with input of size 70 for LOIs [2022-12-14 07:03:26,772 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 8 for LOIs [2022-12-14 07:03:26,773 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 07:03:29,476 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '15201#(and (<= 0 |ULTIMATE.start_upsweep_#in~a#1.offset|) (<= |ULTIMATE.start_main_~n~0#1| 2147483647) (<= 0 |ULTIMATE.start_upsweep_~a#1.offset|) (<= 1 |ULTIMATE.start_upsweep_#in~n#1|) (<= 0 |ULTIMATE.start_main_~a~0#1.offset|) (<= 0 |ULTIMATE.start_is_pow2_#res#1|) (= |ULTIMATE.start_upsweep_~space~0#1| 1) (<= |ULTIMATE.start_upsweep_#in~a#1.offset| 0) (= |ULTIMATE.start_main_#t~malloc16#1.offset| 0) (<= 0 (+ |ULTIMATE.start_is_pow2_#in~x#1| 2147483648)) (= (select (select |#memory_int| |ULTIMATE.start_upsweep_~a#1.base|) (+ (* 4 |ULTIMATE.start_upsweep_~left~0#1|) |ULTIMATE.start_upsweep_~a#1.offset|)) |ULTIMATE.start_upsweep_#t~mem5#1|) (= |ULTIMATE.start_upsweep_~right~0#1| (+ |ULTIMATE.start_upsweep_~space~0#1| |ULTIMATE.start_upsweep_~left~0#1|)) (<= (+ (* 4 |ULTIMATE.start_upsweep_~left~0#1|) |ULTIMATE.start_upsweep_~a#1.offset| 4) (select |#length| |ULTIMATE.start_upsweep_~a#1.base|)) (<= |ULTIMATE.start_upsweep_~a#1.offset| 0) (<= |ULTIMATE.start_is_pow2_#res#1| 1) (<= |ULTIMATE.start_upsweep_#in~n#1| 2147483647) (<= 0 (+ (* 4 |ULTIMATE.start_upsweep_~left~0#1|) |ULTIMATE.start_upsweep_~a#1.offset|)) (<= 1 |ULTIMATE.start_main_~n~0#1|) (<= 1 |ULTIMATE.start_main_~i~1#1|) (<= |ULTIMATE.start_upsweep_~n#1| 2147483647) (= (select |#valid| |ULTIMATE.start_upsweep_~a#1.base|) 1) (< |ULTIMATE.start_upsweep_~left~0#1| |ULTIMATE.start_upsweep_~n#1|) (<= 0 |ULTIMATE.start_main_~a0~0#1.offset|) (= |#NULL.offset| 0) (<= |ULTIMATE.start_is_pow2_#in~x#1| 2147483647) (= |ULTIMATE.start_main_#t~malloc15#1.offset| 0) (<= |ULTIMATE.start_main_~a0~0#1.offset| 0) (not (<= (+ (* |ULTIMATE.start_upsweep_~right~0#1| 4) |ULTIMATE.start_upsweep_~a#1.offset| 4) (select |#length| |ULTIMATE.start_upsweep_~a#1.base|))) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~a~0#1.offset| 0) (= |#NULL.base| 0))' at error location [2022-12-14 07:03:29,476 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 07:03:29,476 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 07:03:29,476 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11] total 31 [2022-12-14 07:03:29,476 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1446898149] [2022-12-14 07:03:29,476 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 07:03:29,476 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-12-14 07:03:29,477 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 07:03:29,477 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-12-14 07:03:29,477 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=241, Invalid=2515, Unknown=0, NotChecked=0, Total=2756 [2022-12-14 07:03:29,478 INFO L87 Difference]: Start difference. First operand 105 states and 122 transitions. Second operand has 31 states, 31 states have (on average 2.6129032258064515) internal successors, (81), 31 states have internal predecessors, (81), 3 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2022-12-14 07:03:34,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:03:34,182 INFO L93 Difference]: Finished difference Result 382 states and 455 transitions. [2022-12-14 07:03:34,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2022-12-14 07:03:34,182 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.6129032258064515) internal successors, (81), 31 states have internal predecessors, (81), 3 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) Word has length 44 [2022-12-14 07:03:34,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:03:34,183 INFO L225 Difference]: With dead ends: 382 [2022-12-14 07:03:34,183 INFO L226 Difference]: Without dead ends: 382 [2022-12-14 07:03:34,184 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 117 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4591 ImplicationChecksByTransitivity, 6.9s TimeCoverageRelationStatistics Valid=1863, Invalid=12179, Unknown=0, NotChecked=0, Total=14042 [2022-12-14 07:03:34,184 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 1577 mSDsluCounter, 276 mSDsCounter, 0 mSdLazyCounter, 1122 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1577 SdHoareTripleChecker+Valid, 303 SdHoareTripleChecker+Invalid, 1184 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 1122 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-12-14 07:03:34,184 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1577 Valid, 303 Invalid, 1184 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 1122 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-12-14 07:03:34,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 382 states. [2022-12-14 07:03:34,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 382 to 137. [2022-12-14 07:03:34,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 121 states have (on average 1.28099173553719) internal successors, (155), 130 states have internal predecessors, (155), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-12-14 07:03:34,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 163 transitions. [2022-12-14 07:03:34,187 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 163 transitions. Word has length 44 [2022-12-14 07:03:34,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:03:34,187 INFO L495 AbstractCegarLoop]: Abstraction has 137 states and 163 transitions. [2022-12-14 07:03:34,187 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.6129032258064515) internal successors, (81), 31 states have internal predecessors, (81), 3 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2022-12-14 07:03:34,187 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 163 transitions. [2022-12-14 07:03:34,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-12-14 07:03:34,188 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:03:34,188 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 07:03:34,192 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68d1f820-b3bd-44ff-981c-6d5644e6ec24/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2022-12-14 07:03:34,388 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37,25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68d1f820-b3bd-44ff-981c-6d5644e6ec24/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 07:03:34,389 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2022-12-14 07:03:34,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:03:34,390 INFO L85 PathProgramCache]: Analyzing trace with hash 1325413642, now seen corresponding path program 2 times [2022-12-14 07:03:34,390 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 07:03:34,390 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [715357396] [2022-12-14 07:03:34,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:03:34,391 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 07:03:34,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:03:34,546 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-12-14 07:03:34,546 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 07:03:34,546 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [715357396] [2022-12-14 07:03:34,546 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [715357396] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 07:03:34,546 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1149527279] [2022-12-14 07:03:34,546 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 07:03:34,547 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 07:03:34,547 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68d1f820-b3bd-44ff-981c-6d5644e6ec24/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 07:03:34,547 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68d1f820-b3bd-44ff-981c-6d5644e6ec24/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 07:03:34,548 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68d1f820-b3bd-44ff-981c-6d5644e6ec24/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-12-14 07:03:34,613 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-12-14 07:03:34,613 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 07:03:34,614 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 21 conjunts are in the unsatisfiable core [2022-12-14 07:03:34,616 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 07:03:34,742 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 8 proven. 5 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-12-14 07:03:34,742 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 07:03:34,939 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 7 treesize of output 5 [2022-12-14 07:03:34,979 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-12-14 07:03:34,979 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1149527279] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 07:03:34,979 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1189787145] [2022-12-14 07:03:34,980 INFO L159 IcfgInterpreter]: Started Sifa with 23 locations of interest [2022-12-14 07:03:34,980 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 07:03:34,980 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 07:03:34,981 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 07:03:34,981 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 07:03:35,183 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-12-14 07:03:35,188 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 10 treesize of output 9 [2022-12-14 07:03:35,215 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 6 [2022-12-14 07:03:35,286 INFO L321 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2022-12-14 07:03:35,287 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 127 treesize of output 127 [2022-12-14 07:03:35,308 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-12-14 07:03:35,308 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 128 treesize of output 130 [2022-12-14 07:03:35,381 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 6 treesize of output 4 [2022-12-14 07:03:35,388 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-12-14 07:03:35,444 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 6 treesize of output 4 [2022-12-14 07:03:35,452 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-12-14 07:03:35,491 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 20 [2022-12-14 07:03:35,563 INFO L321 Elim1Store]: treesize reduction 84, result has 9.7 percent of original size [2022-12-14 07:03:35,563 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 265 treesize of output 262 [2022-12-14 07:03:35,620 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:03:35,630 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 07:03:35,630 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 25 treesize of output 25 [2022-12-14 07:03:35,647 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:03:35,657 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 07:03:35,657 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 25 treesize of output 25 [2022-12-14 07:03:35,859 INFO L321 Elim1Store]: treesize reduction 76, result has 31.5 percent of original size [2022-12-14 07:03:35,860 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 285 treesize of output 306 [2022-12-14 07:03:36,136 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:03:36,137 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:03:36,177 INFO L321 Elim1Store]: treesize reduction 28, result has 60.6 percent of original size [2022-12-14 07:03:36,177 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 2 case distinctions, treesize of input 276 treesize of output 309 [2022-12-14 07:03:36,264 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:03:36,265 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:03:36,294 INFO L321 Elim1Store]: treesize reduction 28, result has 60.6 percent of original size [2022-12-14 07:03:36,295 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 2 case distinctions, treesize of input 49 treesize of output 82 [2022-12-14 07:03:36,360 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:03:36,361 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:03:36,362 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:03:36,363 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:03:36,395 INFO L321 Elim1Store]: treesize reduction 28, result has 60.6 percent of original size [2022-12-14 07:03:36,395 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 274 treesize of output 297 [2022-12-14 07:03:36,462 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:03:36,463 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:03:36,464 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:03:36,465 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:03:36,504 INFO L321 Elim1Store]: treesize reduction 28, result has 60.6 percent of original size [2022-12-14 07:03:36,505 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 47 treesize of output 70 [2022-12-14 07:03:36,638 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:03:36,638 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 28 [2022-12-14 07:03:36,692 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:03:36,693 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 0 case distinctions, treesize of input 36 treesize of output 28 [2022-12-14 07:03:36,791 INFO L197 IcfgInterpreter]: Interpreting procedure #Ultimate.meminit with input of size 70 for LOIs [2022-12-14 07:03:36,807 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 8 for LOIs [2022-12-14 07:03:36,808 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 07:03:39,590 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '16163#(and (<= 0 |ULTIMATE.start_upsweep_#in~a#1.offset|) (<= |ULTIMATE.start_main_~n~0#1| 2147483647) (<= 0 |ULTIMATE.start_upsweep_~a#1.offset|) (<= 1 |ULTIMATE.start_upsweep_~space~0#1|) (<= 1 |ULTIMATE.start_upsweep_#in~n#1|) (<= 0 |ULTIMATE.start_main_~a~0#1.offset|) (<= 0 |ULTIMATE.start_is_pow2_#res#1|) (<= |ULTIMATE.start_upsweep_#in~a#1.offset| 0) (= |ULTIMATE.start_main_#t~malloc16#1.offset| 0) (<= 0 (+ |ULTIMATE.start_is_pow2_#in~x#1| 2147483648)) (= |ULTIMATE.start_upsweep_~right~0#1| (+ |ULTIMATE.start_upsweep_~space~0#1| |ULTIMATE.start_upsweep_~left~0#1|)) (<= 0 |ULTIMATE.start_upsweep_~left~0#1|) (<= |ULTIMATE.start_upsweep_~a#1.offset| 0) (<= |ULTIMATE.start_is_pow2_#res#1| 1) (<= |ULTIMATE.start_upsweep_#in~n#1| 2147483647) (not (<= (+ (* 4 |ULTIMATE.start_upsweep_~left~0#1|) |ULTIMATE.start_upsweep_~a#1.offset| 4) (select |#length| |ULTIMATE.start_upsweep_~a#1.base|))) (<= 1 |ULTIMATE.start_main_~n~0#1|) (<= 1 |ULTIMATE.start_main_~i~1#1|) (<= |ULTIMATE.start_upsweep_~n#1| 2147483647) (< |ULTIMATE.start_upsweep_~left~0#1| |ULTIMATE.start_upsweep_~n#1|) (<= 0 |ULTIMATE.start_main_~a0~0#1.offset|) (= |#NULL.offset| 0) (<= |ULTIMATE.start_is_pow2_#in~x#1| 2147483647) (= |ULTIMATE.start_main_#t~malloc15#1.offset| 0) (<= |ULTIMATE.start_main_~a0~0#1.offset| 0) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~a~0#1.offset| 0) (= |#NULL.base| 0))' at error location [2022-12-14 07:03:39,590 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 07:03:39,590 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 07:03:39,590 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 24 [2022-12-14 07:03:39,591 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1926004253] [2022-12-14 07:03:39,591 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 07:03:39,591 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-12-14 07:03:39,591 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 07:03:39,592 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-12-14 07:03:39,592 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=265, Invalid=1897, Unknown=0, NotChecked=0, Total=2162 [2022-12-14 07:03:39,592 INFO L87 Difference]: Start difference. First operand 137 states and 163 transitions. Second operand has 25 states, 24 states have (on average 2.5833333333333335) internal successors, (62), 25 states have internal predecessors, (62), 7 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) [2022-12-14 07:03:40,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:03:40,437 INFO L93 Difference]: Finished difference Result 194 states and 230 transitions. [2022-12-14 07:03:40,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-12-14 07:03:40,437 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 24 states have (on average 2.5833333333333335) internal successors, (62), 25 states have internal predecessors, (62), 7 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) Word has length 45 [2022-12-14 07:03:40,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:03:40,438 INFO L225 Difference]: With dead ends: 194 [2022-12-14 07:03:40,438 INFO L226 Difference]: Without dead ends: 194 [2022-12-14 07:03:40,439 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1140 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=595, Invalid=3311, Unknown=0, NotChecked=0, Total=3906 [2022-12-14 07:03:40,439 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 576 mSDsluCounter, 192 mSDsCounter, 0 mSdLazyCounter, 519 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 576 SdHoareTripleChecker+Valid, 220 SdHoareTripleChecker+Invalid, 527 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 519 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 07:03:40,439 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [576 Valid, 220 Invalid, 527 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 519 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 07:03:40,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2022-12-14 07:03:40,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 135. [2022-12-14 07:03:40,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 120 states have (on average 1.2666666666666666) internal successors, (152), 128 states have internal predecessors, (152), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-12-14 07:03:40,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 160 transitions. [2022-12-14 07:03:40,441 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 160 transitions. Word has length 45 [2022-12-14 07:03:40,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:03:40,442 INFO L495 AbstractCegarLoop]: Abstraction has 135 states and 160 transitions. [2022-12-14 07:03:40,442 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 24 states have (on average 2.5833333333333335) internal successors, (62), 25 states have internal predecessors, (62), 7 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) [2022-12-14 07:03:40,442 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 160 transitions. [2022-12-14 07:03:40,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-12-14 07:03:40,442 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:03:40,442 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 07:03:40,447 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68d1f820-b3bd-44ff-981c-6d5644e6ec24/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2022-12-14 07:03:40,642 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68d1f820-b3bd-44ff-981c-6d5644e6ec24/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2022-12-14 07:03:40,643 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr23REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2022-12-14 07:03:40,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:03:40,643 INFO L85 PathProgramCache]: Analyzing trace with hash 372584381, now seen corresponding path program 1 times [2022-12-14 07:03:40,643 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 07:03:40,643 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1053969255] [2022-12-14 07:03:40,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:03:40,643 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 07:03:40,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:03:40,815 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-12-14 07:03:40,816 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 07:03:40,816 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1053969255] [2022-12-14 07:03:40,816 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1053969255] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 07:03:40,816 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1226720879] [2022-12-14 07:03:40,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:03:40,816 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 07:03:40,816 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68d1f820-b3bd-44ff-981c-6d5644e6ec24/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 07:03:40,817 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68d1f820-b3bd-44ff-981c-6d5644e6ec24/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 07:03:40,818 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68d1f820-b3bd-44ff-981c-6d5644e6ec24/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-12-14 07:03:40,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:03:40,899 INFO L263 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 18 conjunts are in the unsatisfiable core [2022-12-14 07:03:40,900 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 07:03:41,025 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-12-14 07:03:41,025 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 07:03:41,105 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 23 treesize of output 19 [2022-12-14 07:03:41,152 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-12-14 07:03:41,152 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1226720879] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 07:03:41,153 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [870669730] [2022-12-14 07:03:41,154 INFO L159 IcfgInterpreter]: Started Sifa with 33 locations of interest [2022-12-14 07:03:41,154 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 07:03:41,154 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 07:03:41,154 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 07:03:41,154 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 07:03:41,350 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-12-14 07:03:41,356 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 10 treesize of output 9 [2022-12-14 07:03:41,391 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 6 [2022-12-14 07:03:41,457 INFO L321 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2022-12-14 07:03:41,457 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 127 treesize of output 127 [2022-12-14 07:03:41,480 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-12-14 07:03:41,481 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 128 treesize of output 130 [2022-12-14 07:03:41,552 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 6 treesize of output 4 [2022-12-14 07:03:41,561 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-12-14 07:03:41,628 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 6 treesize of output 4 [2022-12-14 07:03:41,639 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-12-14 07:03:41,718 INFO L321 Elim1Store]: treesize reduction 28, result has 15.2 percent of original size [2022-12-14 07:03:41,718 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 200 treesize of output 196 [2022-12-14 07:03:41,758 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:03:41,769 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 07:03:41,769 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 25 treesize of output 25 [2022-12-14 07:03:41,788 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:03:41,797 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 07:03:41,797 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 25 treesize of output 25 [2022-12-14 07:03:41,859 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:03:41,860 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 0 case distinctions, treesize of input 36 treesize of output 28 [2022-12-14 07:03:41,922 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:03:41,922 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 0 case distinctions, treesize of input 36 treesize of output 28 [2022-12-14 07:03:41,978 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:03:41,979 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 0 case distinctions, treesize of input 36 treesize of output 28 [2022-12-14 07:03:42,042 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 07:03:42,140 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:03:42,142 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:03:42,171 INFO L321 Elim1Store]: treesize reduction 25, result has 59.7 percent of original size [2022-12-14 07:03:42,171 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 2 case distinctions, treesize of input 57 treesize of output 67 [2022-12-14 07:03:42,228 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:03:42,229 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:03:42,236 INFO L321 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-12-14 07:03:42,237 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 1 case distinctions, treesize of input 58 treesize of output 52 [2022-12-14 07:03:42,372 INFO L321 Elim1Store]: treesize reduction 22, result has 59.3 percent of original size [2022-12-14 07:03:42,372 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 33 treesize of output 45 [2022-12-14 07:03:42,429 INFO L321 Elim1Store]: treesize reduction 27, result has 61.4 percent of original size [2022-12-14 07:03:42,429 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 69 treesize of output 77 [2022-12-14 07:03:42,535 INFO L321 Elim1Store]: treesize reduction 22, result has 59.3 percent of original size [2022-12-14 07:03:42,535 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 33 treesize of output 45 [2022-12-14 07:03:42,592 INFO L321 Elim1Store]: treesize reduction 27, result has 61.4 percent of original size [2022-12-14 07:03:42,592 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 69 treesize of output 77 [2022-12-14 07:03:42,737 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:03:42,738 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 0 case distinctions, treesize of input 45 treesize of output 28 [2022-12-14 07:03:42,789 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:03:42,790 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 0 case distinctions, treesize of input 40 treesize of output 31 [2022-12-14 07:03:42,895 INFO L321 Elim1Store]: treesize reduction 22, result has 59.3 percent of original size [2022-12-14 07:03:42,895 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 45 [2022-12-14 07:03:42,956 INFO L321 Elim1Store]: treesize reduction 27, result has 61.4 percent of original size [2022-12-14 07:03:42,956 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 69 treesize of output 77 [2022-12-14 07:03:43,082 INFO L321 Elim1Store]: treesize reduction 22, result has 59.3 percent of original size [2022-12-14 07:03:43,082 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 33 treesize of output 45 [2022-12-14 07:03:43,157 INFO L321 Elim1Store]: treesize reduction 27, result has 61.4 percent of original size [2022-12-14 07:03:43,157 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 69 treesize of output 77 [2022-12-14 07:03:43,280 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:03:43,281 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 0 case distinctions, treesize of input 45 treesize of output 28 [2022-12-14 07:03:43,322 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:03:43,323 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 0 case distinctions, treesize of input 40 treesize of output 31 [2022-12-14 07:03:43,434 INFO L321 Elim1Store]: treesize reduction 22, result has 59.3 percent of original size [2022-12-14 07:03:43,434 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 33 treesize of output 45 [2022-12-14 07:03:43,509 INFO L321 Elim1Store]: treesize reduction 27, result has 61.4 percent of original size [2022-12-14 07:03:43,510 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 69 treesize of output 77 [2022-12-14 07:03:43,644 INFO L321 Elim1Store]: treesize reduction 22, result has 59.3 percent of original size [2022-12-14 07:03:43,644 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 33 treesize of output 45 [2022-12-14 07:03:43,725 INFO L321 Elim1Store]: treesize reduction 27, result has 61.4 percent of original size [2022-12-14 07:03:43,725 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 69 treesize of output 77 [2022-12-14 07:03:43,949 INFO L197 IcfgInterpreter]: Interpreting procedure #Ultimate.meminit with input of size 70 for LOIs [2022-12-14 07:03:43,970 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 8 for LOIs [2022-12-14 07:03:43,971 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 07:03:49,642 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '16830#(and (<= 0 |ULTIMATE.start_upsweep_#in~a#1.offset|) (<= |ULTIMATE.start_main_~n~0#1| 2147483647) (<= 0 |ULTIMATE.start_upsweep_~a#1.offset|) (= |ULTIMATE.start_check_~a#1.offset| |ULTIMATE.start_check_#in~a#1.offset|) (= |ULTIMATE.start_check_#in~n#1| |ULTIMATE.start_check_~n#1|) (< |ULTIMATE.start_check_~i~0#1| |ULTIMATE.start_check_~n#1|) (<= 0 (+ |ULTIMATE.start_downsweep_~n#1| 2147483648)) (<= 0 |#NULL.base|) (<= 0 (+ |ULTIMATE.start_downsweep_#in~n#1| 2147483648)) (= |ULTIMATE.start_check_#in~a#1.base| |ULTIMATE.start_main_~a~0#1.base|) (<= 0 |ULTIMATE.start_main_~a~0#1.offset|) (<= 0 |ULTIMATE.start_is_pow2_#res#1|) (= |ULTIMATE.start_check_#in~a0#1.base| |ULTIMATE.start_check_~a0#1.base|) (<= 0 |ULTIMATE.start_main_~i~1#1|) (<= |ULTIMATE.start_upsweep_#in~a#1.offset| 0) (<= |ULTIMATE.start_downsweep_~n#1| 2147483647) (not (< 0 |ULTIMATE.start_downsweep_~space#1|)) (<= 0 |ULTIMATE.start_downsweep_~a#1.offset|) (<= |ULTIMATE.start_upsweep_#res#1| 2147483647) (<= 0 (+ |ULTIMATE.start_is_pow2_#in~x#1| 2147483648)) (<= 0 (+ |ULTIMATE.start_upsweep_#res#1| 2147483648)) (= |ULTIMATE.start_check_~sum~0#1| 0) (= |ULTIMATE.start_main_~a0~0#1.base| |ULTIMATE.start_check_#in~a0#1.base|) (= |ULTIMATE.start_check_~i~0#1| 0) (<= 0 (+ |ULTIMATE.start_upsweep_~n#1| 2147483648)) (<= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_downsweep_#in~a#1.offset|) (not (<= (+ |ULTIMATE.start_check_~a#1.offset| (* |ULTIMATE.start_check_~i~0#1| 4) 4) (select |#length| |ULTIMATE.start_check_~a#1.base|))) (<= 0 (+ |ULTIMATE.start_downsweep_#in~space#1| 2147483648)) (= |ULTIMATE.start_main_~a~0#1.offset| |ULTIMATE.start_check_#in~a#1.offset|) (<= 0 |ULTIMATE.start_main_#t~malloc16#1.offset|) (<= |ULTIMATE.start_downsweep_#in~space#1| 2147483647) (<= |ULTIMATE.start_upsweep_~a#1.offset| 0) (= |ULTIMATE.start_main_~n~0#1| |ULTIMATE.start_check_#in~n#1|) (<= |ULTIMATE.start_is_pow2_#res#1| 1) (<= 0 (+ 2147483648 |ULTIMATE.start_main_~space~1#1|)) (<= |ULTIMATE.start_downsweep_~a#1.offset| 0) (<= 0 (+ |ULTIMATE.start_upsweep_#in~n#1| 2147483648)) (<= |ULTIMATE.start_upsweep_#in~n#1| 2147483647) (<= 0 (+ |ULTIMATE.start_upsweep_~space~0#1| 2147483648)) (<= |ULTIMATE.start_upsweep_~n#1| 2147483647) (<= |#NULL.base| 0) (<= |ULTIMATE.start_main_#t~malloc15#1.offset| 0) (<= |ULTIMATE.start_upsweep_~space~0#1| 2147483647) (<= |ULTIMATE.start_downsweep_#in~n#1| 2147483647) (<= 0 |ULTIMATE.start_main_~a0~0#1.offset|) (<= |ULTIMATE.start_is_pow2_#in~x#1| 2147483647) (<= |ULTIMATE.start_downsweep_#in~a#1.offset| 0) (= |ULTIMATE.start_check_#in~a0#1.offset| |ULTIMATE.start_main_~a0~0#1.offset|) (= |ULTIMATE.start_check_~a#1.base| |ULTIMATE.start_check_#in~a#1.base|) (<= |ULTIMATE.start_main_~space~1#1| 2147483647) (<= |ULTIMATE.start_main_~a0~0#1.offset| 0) (<= 0 |#NULL.offset|) (<= 0 |ULTIMATE.start_main_#t~malloc15#1.offset|) (<= 0 |#StackHeapBarrier|) (= |ULTIMATE.start_check_#in~a0#1.offset| |ULTIMATE.start_check_~a0#1.offset|) (<= |ULTIMATE.start_main_~a~0#1.offset| 0) (<= |ULTIMATE.start_main_#t~malloc16#1.offset| 0))' at error location [2022-12-14 07:03:49,642 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 07:03:49,642 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 07:03:49,642 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 7, 7] total 19 [2022-12-14 07:03:49,642 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1648137093] [2022-12-14 07:03:49,642 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 07:03:49,642 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-12-14 07:03:49,643 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 07:03:49,643 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-12-14 07:03:49,643 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=386, Invalid=2164, Unknown=0, NotChecked=0, Total=2550 [2022-12-14 07:03:49,643 INFO L87 Difference]: Start difference. First operand 135 states and 160 transitions. Second operand has 20 states, 19 states have (on average 4.578947368421052) internal successors, (87), 20 states have internal predecessors, (87), 5 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2022-12-14 07:03:49,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:03:49,999 INFO L93 Difference]: Finished difference Result 155 states and 178 transitions. [2022-12-14 07:03:50,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-12-14 07:03:50,000 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 4.578947368421052) internal successors, (87), 20 states have internal predecessors, (87), 5 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) Word has length 45 [2022-12-14 07:03:50,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:03:50,000 INFO L225 Difference]: With dead ends: 155 [2022-12-14 07:03:50,000 INFO L226 Difference]: Without dead ends: 155 [2022-12-14 07:03:50,000 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 92 SyntacticMatches, 2 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1275 ImplicationChecksByTransitivity, 6.0s TimeCoverageRelationStatistics Valid=585, Invalid=3075, Unknown=0, NotChecked=0, Total=3660 [2022-12-14 07:03:50,001 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 336 mSDsluCounter, 136 mSDsCounter, 0 mSdLazyCounter, 372 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 336 SdHoareTripleChecker+Valid, 155 SdHoareTripleChecker+Invalid, 378 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 372 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 07:03:50,001 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [336 Valid, 155 Invalid, 378 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 372 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 07:03:50,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2022-12-14 07:03:50,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 137. [2022-12-14 07:03:50,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 122 states have (on average 1.2622950819672132) internal successors, (154), 130 states have internal predecessors, (154), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-12-14 07:03:50,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 162 transitions. [2022-12-14 07:03:50,003 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 162 transitions. Word has length 45 [2022-12-14 07:03:50,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:03:50,003 INFO L495 AbstractCegarLoop]: Abstraction has 137 states and 162 transitions. [2022-12-14 07:03:50,003 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 4.578947368421052) internal successors, (87), 20 states have internal predecessors, (87), 5 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2022-12-14 07:03:50,003 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 162 transitions. [2022-12-14 07:03:50,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-12-14 07:03:50,003 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:03:50,003 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 07:03:50,007 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68d1f820-b3bd-44ff-981c-6d5644e6ec24/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2022-12-14 07:03:50,204 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68d1f820-b3bd-44ff-981c-6d5644e6ec24/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2022-12-14 07:03:50,205 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2022-12-14 07:03:50,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:03:50,206 INFO L85 PathProgramCache]: Analyzing trace with hash -1861850051, now seen corresponding path program 2 times [2022-12-14 07:03:50,206 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 07:03:50,206 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1818203980] [2022-12-14 07:03:50,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:03:50,207 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 07:03:50,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:03:50,363 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-12-14 07:03:50,363 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 07:03:50,363 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1818203980] [2022-12-14 07:03:50,363 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1818203980] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 07:03:50,363 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1873321838] [2022-12-14 07:03:50,363 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 07:03:50,363 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 07:03:50,363 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68d1f820-b3bd-44ff-981c-6d5644e6ec24/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 07:03:50,364 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68d1f820-b3bd-44ff-981c-6d5644e6ec24/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 07:03:50,364 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68d1f820-b3bd-44ff-981c-6d5644e6ec24/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-12-14 07:03:50,568 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-12-14 07:03:50,568 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 07:03:50,569 INFO L263 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 32 conjunts are in the unsatisfiable core [2022-12-14 07:03:50,570 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 07:03:50,916 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-12-14 07:03:50,917 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 07:03:51,136 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 23 treesize of output 19 [2022-12-14 07:03:51,294 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-12-14 07:03:51,294 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1873321838] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 07:03:51,294 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2119335945] [2022-12-14 07:03:51,295 INFO L159 IcfgInterpreter]: Started Sifa with 23 locations of interest [2022-12-14 07:03:51,295 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 07:03:51,295 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 07:03:51,295 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 07:03:51,295 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 07:03:51,583 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 10 treesize of output 9 [2022-12-14 07:03:51,588 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-12-14 07:03:51,620 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 6 [2022-12-14 07:03:51,687 INFO L321 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2022-12-14 07:03:51,687 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 127 treesize of output 127 [2022-12-14 07:03:51,708 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-12-14 07:03:51,708 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 128 treesize of output 130 [2022-12-14 07:03:51,799 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 6 treesize of output 4 [2022-12-14 07:03:51,809 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-12-14 07:03:51,899 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 6 treesize of output 4 [2022-12-14 07:03:51,909 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-12-14 07:03:51,985 INFO L321 Elim1Store]: treesize reduction 28, result has 15.2 percent of original size [2022-12-14 07:03:51,985 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 200 treesize of output 196 [2022-12-14 07:03:52,037 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:03:52,046 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 07:03:52,047 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 07:03:52,066 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:03:52,076 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 07:03:52,076 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 25 treesize of output 25 [2022-12-14 07:03:52,152 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:03:52,152 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 0 case distinctions, treesize of input 34 treesize of output 26 [2022-12-14 07:03:52,205 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:03:52,206 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 0 case distinctions, treesize of input 36 treesize of output 28 [2022-12-14 07:03:52,257 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:03:52,257 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 0 case distinctions, treesize of input 36 treesize of output 28 [2022-12-14 07:03:52,390 INFO L197 IcfgInterpreter]: Interpreting procedure #Ultimate.meminit with input of size 70 for LOIs [2022-12-14 07:03:52,415 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 8 for LOIs [2022-12-14 07:03:52,416 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 07:03:55,911 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '17475#(and (<= 0 |ULTIMATE.start_upsweep_#in~a#1.offset|) (<= |ULTIMATE.start_main_~n~0#1| 2147483647) (<= 0 |ULTIMATE.start_upsweep_~a#1.offset|) (<= 1 |ULTIMATE.start_upsweep_#in~n#1|) (<= 0 |ULTIMATE.start_main_~a~0#1.offset|) (<= 0 |ULTIMATE.start_is_pow2_#res#1|) (<= |ULTIMATE.start_upsweep_#in~a#1.offset| 0) (= |ULTIMATE.start_main_#t~malloc16#1.offset| 0) (<= 0 (+ |ULTIMATE.start_is_pow2_#in~x#1| 2147483648)) (= (select (select |#memory_int| |ULTIMATE.start_upsweep_~a#1.base|) (+ (* 4 |ULTIMATE.start_upsweep_~left~0#1|) |ULTIMATE.start_upsweep_~a#1.offset|)) |ULTIMATE.start_upsweep_#t~mem5#1|) (= |ULTIMATE.start_upsweep_~right~0#1| (+ |ULTIMATE.start_upsweep_~space~0#1| |ULTIMATE.start_upsweep_~left~0#1|)) (<= (+ (* 4 |ULTIMATE.start_upsweep_~left~0#1|) |ULTIMATE.start_upsweep_~a#1.offset| 4) (select |#length| |ULTIMATE.start_upsweep_~a#1.base|)) (<= |ULTIMATE.start_upsweep_~a#1.offset| 0) (<= |ULTIMATE.start_is_pow2_#res#1| 1) (<= |ULTIMATE.start_upsweep_#in~n#1| 2147483647) (<= 0 (+ (* 4 |ULTIMATE.start_upsweep_~left~0#1|) |ULTIMATE.start_upsweep_~a#1.offset|)) (<= 1 |ULTIMATE.start_main_~n~0#1|) (<= 1 |ULTIMATE.start_main_~i~1#1|) (<= |ULTIMATE.start_upsweep_~n#1| 2147483647) (= (select |#valid| |ULTIMATE.start_upsweep_~a#1.base|) 1) (< |ULTIMATE.start_upsweep_~left~0#1| |ULTIMATE.start_upsweep_~n#1|) (<= 0 |ULTIMATE.start_main_~a0~0#1.offset|) (= |#NULL.offset| 0) (<= |ULTIMATE.start_is_pow2_#in~x#1| 2147483647) (= |ULTIMATE.start_main_#t~malloc15#1.offset| 0) (<= |ULTIMATE.start_main_~a0~0#1.offset| 0) (not (<= (+ (* |ULTIMATE.start_upsweep_~right~0#1| 4) |ULTIMATE.start_upsweep_~a#1.offset| 4) (select |#length| |ULTIMATE.start_upsweep_~a#1.base|))) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~a~0#1.offset| 0) (= |#NULL.base| 0))' at error location [2022-12-14 07:03:55,911 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 07:03:55,911 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 07:03:55,911 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 31 [2022-12-14 07:03:55,911 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [856272749] [2022-12-14 07:03:55,912 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 07:03:55,912 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-12-14 07:03:55,912 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 07:03:55,912 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-12-14 07:03:55,913 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=254, Invalid=2608, Unknown=0, NotChecked=0, Total=2862 [2022-12-14 07:03:55,913 INFO L87 Difference]: Start difference. First operand 137 states and 162 transitions. Second operand has 32 states, 31 states have (on average 2.2903225806451615) internal successors, (71), 32 states have internal predecessors, (71), 9 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 9 states have call predecessors, (10), 9 states have call successors, (10) [2022-12-14 07:03:58,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:03:58,062 INFO L93 Difference]: Finished difference Result 253 states and 301 transitions. [2022-12-14 07:03:58,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-12-14 07:03:58,062 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 31 states have (on average 2.2903225806451615) internal successors, (71), 32 states have internal predecessors, (71), 9 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 9 states have call predecessors, (10), 9 states have call successors, (10) Word has length 46 [2022-12-14 07:03:58,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:03:58,064 INFO L225 Difference]: With dead ends: 253 [2022-12-14 07:03:58,064 INFO L226 Difference]: Without dead ends: 253 [2022-12-14 07:03:58,064 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1548 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=867, Invalid=5295, Unknown=0, NotChecked=0, Total=6162 [2022-12-14 07:03:58,064 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 1378 mSDsluCounter, 325 mSDsCounter, 0 mSdLazyCounter, 980 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1378 SdHoareTripleChecker+Valid, 361 SdHoareTripleChecker+Invalid, 997 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 980 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-12-14 07:03:58,064 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1378 Valid, 361 Invalid, 997 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 980 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-12-14 07:03:58,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 253 states. [2022-12-14 07:03:58,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 253 to 147. [2022-12-14 07:03:58,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147 states, 132 states have (on average 1.2651515151515151) internal successors, (167), 140 states have internal predecessors, (167), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-12-14 07:03:58,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 175 transitions. [2022-12-14 07:03:58,066 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 175 transitions. Word has length 46 [2022-12-14 07:03:58,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:03:58,067 INFO L495 AbstractCegarLoop]: Abstraction has 147 states and 175 transitions. [2022-12-14 07:03:58,067 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 31 states have (on average 2.2903225806451615) internal successors, (71), 32 states have internal predecessors, (71), 9 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 9 states have call predecessors, (10), 9 states have call successors, (10) [2022-12-14 07:03:58,067 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 175 transitions. [2022-12-14 07:03:58,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-12-14 07:03:58,067 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:03:58,067 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 07:03:58,072 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68d1f820-b3bd-44ff-981c-6d5644e6ec24/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2022-12-14 07:03:58,268 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68d1f820-b3bd-44ff-981c-6d5644e6ec24/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 07:03:58,269 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr28ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2022-12-14 07:03:58,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:03:58,270 INFO L85 PathProgramCache]: Analyzing trace with hash -1334699702, now seen corresponding path program 1 times [2022-12-14 07:03:58,270 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 07:03:58,270 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2033602174] [2022-12-14 07:03:58,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:03:58,271 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 07:03:58,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:03:58,393 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-12-14 07:03:58,393 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 07:03:58,393 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2033602174] [2022-12-14 07:03:58,393 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2033602174] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 07:03:58,394 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1509703553] [2022-12-14 07:03:58,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:03:58,394 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 07:03:58,394 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68d1f820-b3bd-44ff-981c-6d5644e6ec24/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 07:03:58,395 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68d1f820-b3bd-44ff-981c-6d5644e6ec24/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 07:03:58,395 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68d1f820-b3bd-44ff-981c-6d5644e6ec24/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-12-14 07:03:58,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:03:58,468 INFO L263 TraceCheckSpWp]: Trace formula consists of 311 conjuncts, 7 conjunts are in the unsatisfiable core [2022-12-14 07:03:58,468 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 07:03:58,503 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-12-14 07:03:58,503 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 07:03:58,546 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-12-14 07:03:58,546 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1509703553] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 07:03:58,546 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1762666241] [2022-12-14 07:03:58,547 INFO L159 IcfgInterpreter]: Started Sifa with 34 locations of interest [2022-12-14 07:03:58,547 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 07:03:58,547 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 07:03:58,548 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 07:03:58,548 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 07:03:58,703 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-12-14 07:03:58,705 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 10 treesize of output 9 [2022-12-14 07:03:58,737 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 6 [2022-12-14 07:03:58,808 INFO L321 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2022-12-14 07:03:58,808 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 127 treesize of output 127 [2022-12-14 07:03:58,830 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-12-14 07:03:58,830 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 128 treesize of output 130 [2022-12-14 07:03:58,899 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 6 treesize of output 4 [2022-12-14 07:03:58,905 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-12-14 07:03:58,959 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 6 treesize of output 4 [2022-12-14 07:03:58,969 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-12-14 07:03:59,045 INFO L321 Elim1Store]: treesize reduction 38, result has 11.6 percent of original size [2022-12-14 07:03:59,045 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 210 treesize of output 206 [2022-12-14 07:03:59,108 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:03:59,115 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 07:03:59,115 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 25 treesize of output 25 [2022-12-14 07:03:59,139 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:03:59,147 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 07:03:59,147 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 25 treesize of output 25 [2022-12-14 07:03:59,163 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:03:59,171 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 07:03:59,171 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 07:03:59,235 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:03:59,236 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 0 case distinctions, treesize of input 36 treesize of output 28 [2022-12-14 07:03:59,297 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:03:59,297 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 0 case distinctions, treesize of input 36 treesize of output 28 [2022-12-14 07:03:59,360 INFO L321 Elim1Store]: treesize reduction 29, result has 59.7 percent of original size [2022-12-14 07:03:59,360 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 36 treesize of output 56 [2022-12-14 07:03:59,423 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 07:03:59,505 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:03:59,507 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:03:59,531 INFO L321 Elim1Store]: treesize reduction 25, result has 59.7 percent of original size [2022-12-14 07:03:59,531 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 2 case distinctions, treesize of input 57 treesize of output 67 [2022-12-14 07:03:59,583 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:03:59,584 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:03:59,589 INFO L321 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-12-14 07:03:59,589 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 1 case distinctions, treesize of input 58 treesize of output 52 [2022-12-14 07:03:59,687 INFO L321 Elim1Store]: treesize reduction 22, result has 59.3 percent of original size [2022-12-14 07:03:59,688 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 33 treesize of output 45 [2022-12-14 07:03:59,735 INFO L321 Elim1Store]: treesize reduction 27, result has 61.4 percent of original size [2022-12-14 07:03:59,735 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 69 treesize of output 77 [2022-12-14 07:03:59,829 INFO L321 Elim1Store]: treesize reduction 22, result has 59.3 percent of original size [2022-12-14 07:03:59,829 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 33 treesize of output 45 [2022-12-14 07:03:59,877 INFO L321 Elim1Store]: treesize reduction 27, result has 61.4 percent of original size [2022-12-14 07:03:59,878 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 69 treesize of output 77 [2022-12-14 07:04:00,006 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:04:00,007 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 0 case distinctions, treesize of input 45 treesize of output 28 [2022-12-14 07:04:00,053 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:04:00,054 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 0 case distinctions, treesize of input 40 treesize of output 31 [2022-12-14 07:04:00,181 INFO L321 Elim1Store]: treesize reduction 22, result has 59.3 percent of original size [2022-12-14 07:04:00,181 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 33 treesize of output 45 [2022-12-14 07:04:00,253 INFO L321 Elim1Store]: treesize reduction 27, result has 61.4 percent of original size [2022-12-14 07:04:00,253 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 69 treesize of output 77 [2022-12-14 07:04:00,383 INFO L321 Elim1Store]: treesize reduction 22, result has 59.3 percent of original size [2022-12-14 07:04:00,383 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 33 treesize of output 45 [2022-12-14 07:04:00,447 INFO L321 Elim1Store]: treesize reduction 27, result has 61.4 percent of original size [2022-12-14 07:04:00,447 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 69 treesize of output 77 [2022-12-14 07:04:00,610 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:04:00,611 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 0 case distinctions, treesize of input 45 treesize of output 28 [2022-12-14 07:04:00,653 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:04:00,654 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 0 case distinctions, treesize of input 38 treesize of output 29 [2022-12-14 07:04:00,745 INFO L321 Elim1Store]: treesize reduction 22, result has 59.3 percent of original size [2022-12-14 07:04:00,745 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 33 treesize of output 45 [2022-12-14 07:04:00,800 INFO L321 Elim1Store]: treesize reduction 27, result has 61.4 percent of original size [2022-12-14 07:04:00,800 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 69 treesize of output 77 [2022-12-14 07:04:00,921 INFO L321 Elim1Store]: treesize reduction 22, result has 59.3 percent of original size [2022-12-14 07:04:00,922 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 33 treesize of output 45 [2022-12-14 07:04:00,979 INFO L321 Elim1Store]: treesize reduction 27, result has 61.4 percent of original size [2022-12-14 07:04:00,980 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 69 treesize of output 77 [2022-12-14 07:04:01,104 INFO L197 IcfgInterpreter]: Interpreting procedure #Ultimate.meminit with input of size 70 for LOIs [2022-12-14 07:04:01,121 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 8 for LOIs [2022-12-14 07:04:01,122 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 07:04:06,578 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '18229#(and (<= 0 |ULTIMATE.start_upsweep_#in~a#1.offset|) (<= 0 |ULTIMATE.start_upsweep_~a#1.offset|) (= |ULTIMATE.start_check_~a#1.offset| |ULTIMATE.start_check_#in~a#1.offset|) (= |ULTIMATE.start_check_#in~n#1| |ULTIMATE.start_check_~n#1|) (<= 0 (+ |ULTIMATE.start_downsweep_~n#1| 2147483648)) (<= 0 |#NULL.base|) (= |ULTIMATE.start_main_~a~0#1.offset| 0) (<= 0 (+ |ULTIMATE.start_downsweep_#in~n#1| 2147483648)) (<= |ULTIMATE.start_downsweep_~space#1| 0) (<= |ULTIMATE.start_check_~n#1| |ULTIMATE.start_check_~i~0#1|) (= |ULTIMATE.start_check_#in~a#1.base| |ULTIMATE.start_main_~a~0#1.base|) (<= 0 |ULTIMATE.start_is_pow2_#res#1|) (= |ULTIMATE.start_check_#in~a0#1.base| |ULTIMATE.start_check_~a0#1.base|) (<= 0 |ULTIMATE.start_main_~i~1#1|) (<= |ULTIMATE.start_upsweep_#in~a#1.offset| 0) (<= |ULTIMATE.start_downsweep_~n#1| 2147483647) (<= 0 |ULTIMATE.start_downsweep_~a#1.offset|) (<= |ULTIMATE.start_upsweep_#res#1| 2147483647) (<= 0 (+ |ULTIMATE.start_is_pow2_#in~x#1| 2147483648)) (<= 0 (+ |ULTIMATE.start_upsweep_#res#1| 2147483648)) (= |ULTIMATE.start_check_~sum~0#1| 0) (not (< |ULTIMATE.start_main_~a~0#1.base| |#StackHeapBarrier|)) (= |ULTIMATE.start_main_~a0~0#1.base| |ULTIMATE.start_check_#in~a0#1.base|) (= |ULTIMATE.start_check_~i~0#1| 0) (<= 0 (+ |ULTIMATE.start_upsweep_~n#1| 2147483648)) (<= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_downsweep_#in~a#1.offset|) (<= 0 (+ |ULTIMATE.start_downsweep_#in~space#1| 2147483648)) (= |ULTIMATE.start_main_~a~0#1.offset| |ULTIMATE.start_check_#in~a#1.offset|) (<= 0 |ULTIMATE.start_main_#t~malloc16#1.offset|) (<= |ULTIMATE.start_downsweep_#in~space#1| 2147483647) (<= |ULTIMATE.start_upsweep_~a#1.offset| 0) (= |ULTIMATE.start_main_~n~0#1| |ULTIMATE.start_check_#in~n#1|) (<= |ULTIMATE.start_is_pow2_#res#1| 1) (<= 0 (+ 2147483648 |ULTIMATE.start_main_~space~1#1|)) (<= |ULTIMATE.start_downsweep_~a#1.offset| 0) (<= 0 (+ |ULTIMATE.start_upsweep_#in~n#1| 2147483648)) (<= |ULTIMATE.start_upsweep_#in~n#1| 2147483647) (<= 0 (+ |ULTIMATE.start_upsweep_~space~0#1| 2147483648)) (<= |ULTIMATE.start_upsweep_~n#1| 2147483647) (<= |#NULL.base| 0) (<= |ULTIMATE.start_main_#t~malloc15#1.offset| 0) (<= |ULTIMATE.start_upsweep_~space~0#1| 2147483647) (<= |ULTIMATE.start_downsweep_#in~n#1| 2147483647) (<= 0 |ULTIMATE.start_main_~a0~0#1.offset|) (<= |ULTIMATE.start_is_pow2_#in~x#1| 2147483647) (<= |ULTIMATE.start_downsweep_#in~a#1.offset| 0) (= |ULTIMATE.start_check_#in~a0#1.offset| |ULTIMATE.start_main_~a0~0#1.offset|) (= |ULTIMATE.start_check_~a#1.base| |ULTIMATE.start_check_#in~a#1.base|) (<= |ULTIMATE.start_main_~space~1#1| 2147483647) (<= |ULTIMATE.start_main_~a0~0#1.offset| 0) (<= 0 |#NULL.offset|) (<= 0 |ULTIMATE.start_main_#t~malloc15#1.offset|) (<= 0 |#StackHeapBarrier|) (= |ULTIMATE.start_check_#in~a0#1.offset| |ULTIMATE.start_check_~a0#1.offset|) (<= |ULTIMATE.start_main_#t~malloc16#1.offset| 0) (<= 0 (+ |ULTIMATE.start_main_~n~0#1| 2147483648)))' at error location [2022-12-14 07:04:06,579 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 07:04:06,579 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 07:04:06,579 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 12 [2022-12-14 07:04:06,579 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [547463359] [2022-12-14 07:04:06,579 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 07:04:06,579 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-12-14 07:04:06,579 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 07:04:06,579 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-12-14 07:04:06,580 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=258, Invalid=1548, Unknown=0, NotChecked=0, Total=1806 [2022-12-14 07:04:06,580 INFO L87 Difference]: Start difference. First operand 147 states and 175 transitions. Second operand has 12 states, 12 states have (on average 5.833333333333333) internal successors, (70), 12 states have internal predecessors, (70), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-12-14 07:04:06,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:04:06,750 INFO L93 Difference]: Finished difference Result 150 states and 174 transitions. [2022-12-14 07:04:06,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-14 07:04:06,751 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 5.833333333333333) internal successors, (70), 12 states have internal predecessors, (70), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 46 [2022-12-14 07:04:06,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:04:06,752 INFO L225 Difference]: With dead ends: 150 [2022-12-14 07:04:06,752 INFO L226 Difference]: Without dead ends: 150 [2022-12-14 07:04:06,752 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 101 SyntacticMatches, 2 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 609 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=305, Invalid=1951, Unknown=0, NotChecked=0, Total=2256 [2022-12-14 07:04:06,753 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 160 mSDsluCounter, 158 mSDsCounter, 0 mSdLazyCounter, 186 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 160 SdHoareTripleChecker+Valid, 189 SdHoareTripleChecker+Invalid, 188 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 186 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 07:04:06,753 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [160 Valid, 189 Invalid, 188 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 186 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 07:04:06,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2022-12-14 07:04:06,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 147. [2022-12-14 07:04:06,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147 states, 132 states have (on average 1.25) internal successors, (165), 140 states have internal predecessors, (165), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-12-14 07:04:06,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 173 transitions. [2022-12-14 07:04:06,756 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 173 transitions. Word has length 46 [2022-12-14 07:04:06,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:04:06,756 INFO L495 AbstractCegarLoop]: Abstraction has 147 states and 173 transitions. [2022-12-14 07:04:06,756 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 5.833333333333333) internal successors, (70), 12 states have internal predecessors, (70), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-12-14 07:04:06,756 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 173 transitions. [2022-12-14 07:04:06,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-12-14 07:04:06,756 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:04:06,756 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 07:04:06,761 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68d1f820-b3bd-44ff-981c-6d5644e6ec24/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2022-12-14 07:04:06,957 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68d1f820-b3bd-44ff-981c-6d5644e6ec24/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2022-12-14 07:04:06,958 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2022-12-14 07:04:06,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:04:06,958 INFO L85 PathProgramCache]: Analyzing trace with hash 1571370718, now seen corresponding path program 1 times [2022-12-14 07:04:06,959 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 07:04:06,959 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1674596593] [2022-12-14 07:04:06,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:04:06,960 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 07:04:06,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:04:08,665 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-14 07:04:08,665 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 07:04:08,665 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1674596593] [2022-12-14 07:04:08,665 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1674596593] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 07:04:08,665 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1137362317] [2022-12-14 07:04:08,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:04:08,665 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 07:04:08,665 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68d1f820-b3bd-44ff-981c-6d5644e6ec24/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 07:04:08,666 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68d1f820-b3bd-44ff-981c-6d5644e6ec24/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 07:04:08,667 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68d1f820-b3bd-44ff-981c-6d5644e6ec24/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-12-14 07:04:08,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:04:08,761 INFO L263 TraceCheckSpWp]: Trace formula consists of 321 conjuncts, 61 conjunts are in the unsatisfiable core [2022-12-14 07:04:08,763 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 07:04:08,996 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 07:04:09,179 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:04:09,180 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 7 [2022-12-14 07:04:09,240 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 11 [2022-12-14 07:04:09,389 INFO L321 Elim1Store]: treesize reduction 7, result has 30.0 percent of original size [2022-12-14 07:04:09,389 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 36 treesize of output 23 [2022-12-14 07:04:09,419 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-14 07:04:09,419 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 07:04:09,489 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 36 treesize of output 32 [2022-12-14 07:04:09,754 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 20 treesize of output 18 [2022-12-14 07:04:09,758 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 20 [2022-12-14 07:04:09,960 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-12-14 07:04:09,960 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1137362317] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 07:04:09,960 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [718669384] [2022-12-14 07:04:09,961 INFO L159 IcfgInterpreter]: Started Sifa with 35 locations of interest [2022-12-14 07:04:09,961 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 07:04:09,961 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 07:04:09,961 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 07:04:09,961 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 07:04:10,123 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-12-14 07:04:10,131 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 10 treesize of output 9 [2022-12-14 07:04:10,155 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 6 [2022-12-14 07:04:10,216 INFO L321 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2022-12-14 07:04:10,216 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 127 treesize of output 127 [2022-12-14 07:04:10,233 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-12-14 07:04:10,233 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 128 treesize of output 130 [2022-12-14 07:04:10,293 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 6 treesize of output 4 [2022-12-14 07:04:10,299 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-12-14 07:04:10,371 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 6 treesize of output 4 [2022-12-14 07:04:10,379 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-12-14 07:04:10,448 INFO L321 Elim1Store]: treesize reduction 38, result has 11.6 percent of original size [2022-12-14 07:04:10,448 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 210 treesize of output 206 [2022-12-14 07:04:10,497 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:04:10,505 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 07:04:10,505 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 25 treesize of output 25 [2022-12-14 07:04:10,531 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:04:10,541 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 07:04:10,541 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 25 treesize of output 25 [2022-12-14 07:04:10,556 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:04:10,563 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 07:04:10,563 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 25 treesize of output 25 [2022-12-14 07:04:10,617 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:04:10,618 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 0 case distinctions, treesize of input 34 treesize of output 26 [2022-12-14 07:04:10,675 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:04:10,676 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 0 case distinctions, treesize of input 36 treesize of output 28 [2022-12-14 07:04:10,720 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:04:10,720 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 0 case distinctions, treesize of input 36 treesize of output 28 [2022-12-14 07:04:10,778 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 07:04:10,865 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:04:10,866 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:04:10,886 INFO L321 Elim1Store]: treesize reduction 25, result has 59.7 percent of original size [2022-12-14 07:04:10,886 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 2 case distinctions, treesize of input 57 treesize of output 67 [2022-12-14 07:04:10,931 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:04:10,932 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:04:10,939 INFO L321 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2022-12-14 07:04:10,939 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 1 case distinctions, treesize of input 65 treesize of output 59 [2022-12-14 07:04:11,040 INFO L321 Elim1Store]: treesize reduction 22, result has 59.3 percent of original size [2022-12-14 07:04:11,040 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 33 treesize of output 45 [2022-12-14 07:04:11,084 INFO L321 Elim1Store]: treesize reduction 27, result has 61.4 percent of original size [2022-12-14 07:04:11,084 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 69 treesize of output 77 [2022-12-14 07:04:11,174 INFO L321 Elim1Store]: treesize reduction 22, result has 59.3 percent of original size [2022-12-14 07:04:11,174 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 33 treesize of output 45 [2022-12-14 07:04:11,224 INFO L321 Elim1Store]: treesize reduction 27, result has 61.4 percent of original size [2022-12-14 07:04:11,224 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 69 treesize of output 77 [2022-12-14 07:04:11,341 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:04:11,342 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 28 [2022-12-14 07:04:11,381 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:04:11,382 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 0 case distinctions, treesize of input 38 treesize of output 29 [2022-12-14 07:04:11,467 INFO L321 Elim1Store]: treesize reduction 22, result has 59.3 percent of original size [2022-12-14 07:04:11,468 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 33 treesize of output 45 [2022-12-14 07:04:11,518 INFO L321 Elim1Store]: treesize reduction 27, result has 61.4 percent of original size [2022-12-14 07:04:11,518 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 69 treesize of output 77 [2022-12-14 07:04:11,605 INFO L321 Elim1Store]: treesize reduction 22, result has 59.3 percent of original size [2022-12-14 07:04:11,606 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 33 treesize of output 45 [2022-12-14 07:04:11,655 INFO L321 Elim1Store]: treesize reduction 27, result has 61.4 percent of original size [2022-12-14 07:04:11,655 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 69 treesize of output 77 [2022-12-14 07:04:11,774 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:04:11,774 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 0 case distinctions, treesize of input 45 treesize of output 28 [2022-12-14 07:04:11,813 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:04:11,814 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 0 case distinctions, treesize of input 38 treesize of output 29 [2022-12-14 07:04:11,902 INFO L321 Elim1Store]: treesize reduction 22, result has 59.3 percent of original size [2022-12-14 07:04:11,903 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 33 treesize of output 45 [2022-12-14 07:04:11,950 INFO L321 Elim1Store]: treesize reduction 27, result has 61.4 percent of original size [2022-12-14 07:04:11,950 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 69 treesize of output 77 [2022-12-14 07:04:12,042 INFO L321 Elim1Store]: treesize reduction 22, result has 59.3 percent of original size [2022-12-14 07:04:12,042 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 33 treesize of output 45 [2022-12-14 07:04:12,092 INFO L321 Elim1Store]: treesize reduction 27, result has 61.4 percent of original size [2022-12-14 07:04:12,092 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 69 treesize of output 77 [2022-12-14 07:04:12,305 INFO L197 IcfgInterpreter]: Interpreting procedure #Ultimate.meminit with input of size 70 for LOIs [2022-12-14 07:04:12,322 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 8 for LOIs [2022-12-14 07:04:12,323 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 07:04:19,911 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '18890#(and (<= 0 |ULTIMATE.start_upsweep_#in~a#1.offset|) (<= |ULTIMATE.start_main_~n~0#1| 2147483647) (<= 0 |ULTIMATE.start_upsweep_~a#1.offset|) (= |ULTIMATE.start_check_~a#1.offset| |ULTIMATE.start_check_#in~a#1.offset|) (= |ULTIMATE.start_check_#in~n#1| |ULTIMATE.start_check_~n#1|) (< |ULTIMATE.start_check_~i~0#1| |ULTIMATE.start_check_~n#1|) (<= 0 (+ |ULTIMATE.start_downsweep_~n#1| 2147483648)) (<= 0 |#NULL.base|) (= (ite (= |ULTIMATE.start_check_#t~mem11#1| |ULTIMATE.start_check_~sum~0#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 (+ |ULTIMATE.start_downsweep_#in~n#1| 2147483648)) (= |ULTIMATE.start_check_#in~a#1.base| |ULTIMATE.start_main_~a~0#1.base|) (<= 0 |ULTIMATE.start_is_pow2_#res#1|) (= |ULTIMATE.start_check_#in~a0#1.base| |ULTIMATE.start_check_~a0#1.base|) (<= 0 |ULTIMATE.start_main_~i~1#1|) (<= |ULTIMATE.start_upsweep_#in~a#1.offset| 0) (<= |ULTIMATE.start_downsweep_~n#1| 2147483647) (not (< 0 |ULTIMATE.start_downsweep_~space#1|)) (<= 0 |ULTIMATE.start_downsweep_~a#1.offset|) (<= |ULTIMATE.start_upsweep_#res#1| 2147483647) (<= 0 (+ |ULTIMATE.start_is_pow2_#in~x#1| 2147483648)) (<= 0 (+ |ULTIMATE.start_upsweep_#res#1| 2147483648)) (= |ULTIMATE.start_check_~sum~0#1| 0) (= |ULTIMATE.start_main_~a0~0#1.base| |ULTIMATE.start_check_#in~a0#1.base|) (= |ULTIMATE.start_check_~i~0#1| 0) (<= 0 (+ |ULTIMATE.start_upsweep_~n#1| 2147483648)) (<= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start_check_#t~mem11#1| (select (select |#memory_int| |ULTIMATE.start_check_~a#1.base|) (+ |ULTIMATE.start_check_~a#1.offset| (* |ULTIMATE.start_check_~i~0#1| 4)))) (<= 0 |ULTIMATE.start_downsweep_#in~a#1.offset|) (<= 0 (+ |ULTIMATE.start_downsweep_#in~space#1| 2147483648)) (= |ULTIMATE.start_main_~a~0#1.offset| |ULTIMATE.start_check_#in~a#1.offset|) (<= 0 |ULTIMATE.start_main_#t~malloc16#1.offset|) (<= |ULTIMATE.start_downsweep_#in~space#1| 2147483647) (<= |ULTIMATE.start_upsweep_~a#1.offset| 0) (= |ULTIMATE.start_main_~n~0#1| |ULTIMATE.start_check_#in~n#1|) (<= |ULTIMATE.start_is_pow2_#res#1| 1) (<= 0 (+ 2147483648 |ULTIMATE.start_main_~space~1#1|)) (= (select |#valid| |ULTIMATE.start_check_~a#1.base|) 1) (<= |ULTIMATE.start_downsweep_~a#1.offset| 0) (<= 0 (+ |ULTIMATE.start_upsweep_#in~n#1| 2147483648)) (<= |ULTIMATE.start_upsweep_#in~n#1| 2147483647) (<= 0 (+ |ULTIMATE.start_upsweep_~space~0#1| 2147483648)) (<= |ULTIMATE.start_upsweep_~n#1| 2147483647) (<= |#NULL.base| 0) (<= |ULTIMATE.start_main_#t~malloc15#1.offset| 0) (<= |ULTIMATE.start_upsweep_~space~0#1| 2147483647) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= |ULTIMATE.start_downsweep_#in~n#1| 2147483647) (<= 0 |ULTIMATE.start_main_~a0~0#1.offset|) (<= |ULTIMATE.start_is_pow2_#in~x#1| 2147483647) (<= |ULTIMATE.start_downsweep_#in~a#1.offset| 0) (= |ULTIMATE.start_check_#in~a0#1.offset| |ULTIMATE.start_main_~a0~0#1.offset|) (<= (+ |ULTIMATE.start_check_~a#1.offset| (* |ULTIMATE.start_check_~i~0#1| 4) 4) (select |#length| |ULTIMATE.start_check_~a#1.base|)) (= |ULTIMATE.start_check_~a#1.base| |ULTIMATE.start_check_#in~a#1.base|) (<= |ULTIMATE.start_main_~space~1#1| 2147483647) (<= 0 (+ |ULTIMATE.start_check_~a#1.offset| (* |ULTIMATE.start_check_~i~0#1| 4))) (<= |ULTIMATE.start_main_~a0~0#1.offset| 0) (<= 0 |#NULL.offset|) (<= 0 |ULTIMATE.start_main_#t~malloc15#1.offset|) (<= 0 |#StackHeapBarrier|) (= |ULTIMATE.start_check_#in~a0#1.offset| |ULTIMATE.start_check_~a0#1.offset|) (<= |ULTIMATE.start_main_~a~0#1.offset| 0) (<= |ULTIMATE.start_main_#t~malloc16#1.offset| 0))' at error location [2022-12-14 07:04:19,911 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 07:04:19,911 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 07:04:19,911 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 16, 14] total 47 [2022-12-14 07:04:19,912 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [309536558] [2022-12-14 07:04:19,912 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 07:04:19,912 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-12-14 07:04:19,912 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 07:04:19,912 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-12-14 07:04:19,913 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=387, Invalid=5775, Unknown=0, NotChecked=0, Total=6162 [2022-12-14 07:04:19,913 INFO L87 Difference]: Start difference. First operand 147 states and 173 transitions. Second operand has 47 states, 42 states have (on average 2.0476190476190474) internal successors, (86), 45 states have internal predecessors, (86), 4 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (7), 3 states have call predecessors, (7), 4 states have call successors, (7) [2022-12-14 07:04:31,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:04:31,921 INFO L93 Difference]: Finished difference Result 205 states and 236 transitions. [2022-12-14 07:04:31,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-12-14 07:04:31,922 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 42 states have (on average 2.0476190476190474) internal successors, (86), 45 states have internal predecessors, (86), 4 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (7), 3 states have call predecessors, (7), 4 states have call successors, (7) Word has length 47 [2022-12-14 07:04:31,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:04:31,923 INFO L225 Difference]: With dead ends: 205 [2022-12-14 07:04:31,923 INFO L226 Difference]: Without dead ends: 205 [2022-12-14 07:04:31,923 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 85 SyntacticMatches, 6 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 3384 ImplicationChecksByTransitivity, 19.4s TimeCoverageRelationStatistics Valid=911, Invalid=11521, Unknown=0, NotChecked=0, Total=12432 [2022-12-14 07:04:31,924 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 607 mSDsluCounter, 359 mSDsCounter, 0 mSdLazyCounter, 1644 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 608 SdHoareTripleChecker+Valid, 374 SdHoareTripleChecker+Invalid, 1667 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 1644 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-12-14 07:04:31,924 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [608 Valid, 374 Invalid, 1667 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 1644 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2022-12-14 07:04:31,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2022-12-14 07:04:31,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 159. [2022-12-14 07:04:31,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159 states, 144 states have (on average 1.2430555555555556) internal successors, (179), 152 states have internal predecessors, (179), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-12-14 07:04:31,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 187 transitions. [2022-12-14 07:04:31,928 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 187 transitions. Word has length 47 [2022-12-14 07:04:31,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:04:31,928 INFO L495 AbstractCegarLoop]: Abstraction has 159 states and 187 transitions. [2022-12-14 07:04:31,928 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 42 states have (on average 2.0476190476190474) internal successors, (86), 45 states have internal predecessors, (86), 4 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (7), 3 states have call predecessors, (7), 4 states have call successors, (7) [2022-12-14 07:04:31,928 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 187 transitions. [2022-12-14 07:04:31,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-12-14 07:04:31,928 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:04:31,929 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 07:04:31,934 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68d1f820-b3bd-44ff-981c-6d5644e6ec24/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2022-12-14 07:04:32,129 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68d1f820-b3bd-44ff-981c-6d5644e6ec24/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2022-12-14 07:04:32,130 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr25REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2022-12-14 07:04:32,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:04:32,132 INFO L85 PathProgramCache]: Analyzing trace with hash 1467856154, now seen corresponding path program 1 times [2022-12-14 07:04:32,132 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 07:04:32,132 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [263426724] [2022-12-14 07:04:32,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:04:32,133 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 07:04:32,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:04:32,208 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-12-14 07:04:32,208 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 07:04:32,208 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [263426724] [2022-12-14 07:04:32,208 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [263426724] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 07:04:32,208 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 07:04:32,208 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 07:04:32,208 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1680388312] [2022-12-14 07:04:32,208 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 07:04:32,209 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 07:04:32,209 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 07:04:32,209 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 07:04:32,209 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-14 07:04:32,209 INFO L87 Difference]: Start difference. First operand 159 states and 187 transitions. Second operand has 5 states, 4 states have (on average 8.75) internal successors, (35), 5 states have internal predecessors, (35), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-12-14 07:04:32,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:04:32,250 INFO L93 Difference]: Finished difference Result 158 states and 186 transitions. [2022-12-14 07:04:32,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 07:04:32,250 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 8.75) internal successors, (35), 5 states have internal predecessors, (35), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 48 [2022-12-14 07:04:32,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:04:32,251 INFO L225 Difference]: With dead ends: 158 [2022-12-14 07:04:32,251 INFO L226 Difference]: Without dead ends: 158 [2022-12-14 07:04:32,251 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-12-14 07:04:32,251 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 63 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 07:04:32,252 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [63 Valid, 62 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 63 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 07:04:32,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2022-12-14 07:04:32,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 158. [2022-12-14 07:04:32,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158 states, 144 states have (on average 1.2361111111111112) internal successors, (178), 151 states have internal predecessors, (178), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-12-14 07:04:32,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 186 transitions. [2022-12-14 07:04:32,253 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 186 transitions. Word has length 48 [2022-12-14 07:04:32,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:04:32,254 INFO L495 AbstractCegarLoop]: Abstraction has 158 states and 186 transitions. [2022-12-14 07:04:32,254 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 8.75) internal successors, (35), 5 states have internal predecessors, (35), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-12-14 07:04:32,254 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 186 transitions. [2022-12-14 07:04:32,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-12-14 07:04:32,254 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:04:32,254 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 07:04:32,254 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2022-12-14 07:04:32,254 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr26REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2022-12-14 07:04:32,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:04:32,254 INFO L85 PathProgramCache]: Analyzing trace with hash 1467856155, now seen corresponding path program 1 times [2022-12-14 07:04:32,254 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 07:04:32,255 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1155356644] [2022-12-14 07:04:32,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:04:32,255 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 07:04:32,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:04:32,422 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-12-14 07:04:32,422 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 07:04:32,422 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1155356644] [2022-12-14 07:04:32,422 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1155356644] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 07:04:32,422 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1660293707] [2022-12-14 07:04:32,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:04:32,422 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 07:04:32,422 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68d1f820-b3bd-44ff-981c-6d5644e6ec24/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 07:04:32,423 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68d1f820-b3bd-44ff-981c-6d5644e6ec24/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 07:04:32,424 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68d1f820-b3bd-44ff-981c-6d5644e6ec24/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-12-14 07:04:32,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:04:32,509 INFO L263 TraceCheckSpWp]: Trace formula consists of 321 conjuncts, 18 conjunts are in the unsatisfiable core [2022-12-14 07:04:32,510 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 07:04:32,599 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-12-14 07:04:32,600 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 07:04:32,675 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 23 treesize of output 19 [2022-12-14 07:04:32,719 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-12-14 07:04:32,719 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1660293707] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 07:04:32,719 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1987165584] [2022-12-14 07:04:32,720 INFO L159 IcfgInterpreter]: Started Sifa with 36 locations of interest [2022-12-14 07:04:32,721 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 07:04:32,721 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 07:04:32,721 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 07:04:32,721 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 07:04:32,900 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-12-14 07:04:32,904 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 10 treesize of output 9 [2022-12-14 07:04:32,929 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 6 [2022-12-14 07:04:32,990 INFO L321 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2022-12-14 07:04:32,991 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 127 treesize of output 127 [2022-12-14 07:04:33,008 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-12-14 07:04:33,008 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 128 treesize of output 130 [2022-12-14 07:04:33,088 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 6 treesize of output 4 [2022-12-14 07:04:33,096 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-12-14 07:04:33,167 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 6 treesize of output 4 [2022-12-14 07:04:33,174 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-12-14 07:04:33,244 INFO L321 Elim1Store]: treesize reduction 38, result has 11.6 percent of original size [2022-12-14 07:04:33,245 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 210 treesize of output 206 [2022-12-14 07:04:33,300 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:04:33,307 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 07:04:33,307 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 25 treesize of output 25 [2022-12-14 07:04:33,331 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:04:33,338 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 07:04:33,338 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 25 treesize of output 25 [2022-12-14 07:04:33,360 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:04:33,368 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 07:04:33,368 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 25 treesize of output 25 [2022-12-14 07:04:33,431 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:04:33,431 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 0 case distinctions, treesize of input 34 treesize of output 26 [2022-12-14 07:04:33,482 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:04:33,483 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 0 case distinctions, treesize of input 36 treesize of output 28 [2022-12-14 07:04:33,537 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:04:33,538 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 0 case distinctions, treesize of input 36 treesize of output 28 [2022-12-14 07:04:33,600 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 07:04:33,683 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:04:33,683 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:04:33,706 INFO L321 Elim1Store]: treesize reduction 25, result has 59.7 percent of original size [2022-12-14 07:04:33,706 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 2 case distinctions, treesize of input 57 treesize of output 67 [2022-12-14 07:04:33,748 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:04:33,749 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:04:33,754 INFO L321 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2022-12-14 07:04:33,755 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 1 case distinctions, treesize of input 101 treesize of output 76 [2022-12-14 07:04:33,895 INFO L321 Elim1Store]: treesize reduction 22, result has 59.3 percent of original size [2022-12-14 07:04:33,895 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 45 [2022-12-14 07:04:33,956 INFO L321 Elim1Store]: treesize reduction 27, result has 61.4 percent of original size [2022-12-14 07:04:33,957 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 69 treesize of output 77 [2022-12-14 07:04:34,059 INFO L321 Elim1Store]: treesize reduction 22, result has 59.3 percent of original size [2022-12-14 07:04:34,060 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 45 [2022-12-14 07:04:34,119 INFO L321 Elim1Store]: treesize reduction 27, result has 61.4 percent of original size [2022-12-14 07:04:34,119 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 69 treesize of output 77 [2022-12-14 07:04:34,251 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:04:34,252 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 0 case distinctions, treesize of input 45 treesize of output 28 [2022-12-14 07:04:34,293 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:04:34,294 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 0 case distinctions, treesize of input 38 treesize of output 29 [2022-12-14 07:04:34,396 INFO L321 Elim1Store]: treesize reduction 22, result has 59.3 percent of original size [2022-12-14 07:04:34,396 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 33 treesize of output 45 [2022-12-14 07:04:34,461 INFO L321 Elim1Store]: treesize reduction 27, result has 61.4 percent of original size [2022-12-14 07:04:34,461 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 69 treesize of output 77 [2022-12-14 07:04:34,568 INFO L321 Elim1Store]: treesize reduction 22, result has 59.3 percent of original size [2022-12-14 07:04:34,568 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 33 treesize of output 45 [2022-12-14 07:04:34,632 INFO L321 Elim1Store]: treesize reduction 27, result has 61.4 percent of original size [2022-12-14 07:04:34,632 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 69 treesize of output 77 [2022-12-14 07:04:34,746 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:04:34,746 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 0 case distinctions, treesize of input 45 treesize of output 28 [2022-12-14 07:04:34,803 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:04:34,804 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 0 case distinctions, treesize of input 40 treesize of output 31 [2022-12-14 07:04:34,910 INFO L321 Elim1Store]: treesize reduction 22, result has 59.3 percent of original size [2022-12-14 07:04:34,910 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 33 treesize of output 45 [2022-12-14 07:04:34,961 INFO L321 Elim1Store]: treesize reduction 27, result has 61.4 percent of original size [2022-12-14 07:04:34,961 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 69 treesize of output 77 [2022-12-14 07:04:35,061 INFO L321 Elim1Store]: treesize reduction 22, result has 59.3 percent of original size [2022-12-14 07:04:35,061 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 33 treesize of output 45 [2022-12-14 07:04:35,110 INFO L321 Elim1Store]: treesize reduction 27, result has 61.4 percent of original size [2022-12-14 07:04:35,110 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 69 treesize of output 77 [2022-12-14 07:04:35,362 INFO L197 IcfgInterpreter]: Interpreting procedure #Ultimate.meminit with input of size 70 for LOIs [2022-12-14 07:04:35,383 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 8 for LOIs [2022-12-14 07:04:35,384 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 07:04:41,945 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '19974#(and (<= 0 |ULTIMATE.start_upsweep_#in~a#1.offset|) (<= |ULTIMATE.start_main_~n~0#1| 2147483647) (<= 0 |ULTIMATE.start_upsweep_~a#1.offset|) (= |ULTIMATE.start_check_~a#1.offset| |ULTIMATE.start_check_#in~a#1.offset|) (= |ULTIMATE.start_check_#in~n#1| |ULTIMATE.start_check_~n#1|) (< |ULTIMATE.start_check_~i~0#1| |ULTIMATE.start_check_~n#1|) (<= 0 (+ |ULTIMATE.start_downsweep_~n#1| 2147483648)) (<= 0 |#NULL.base|) (<= 0 (+ |ULTIMATE.start_downsweep_#in~n#1| 2147483648)) (= |ULTIMATE.start_check_#in~a#1.base| |ULTIMATE.start_main_~a~0#1.base|) (<= 0 |ULTIMATE.start_is_pow2_#res#1|) (= |ULTIMATE.start_check_#in~a0#1.base| |ULTIMATE.start_check_~a0#1.base|) (<= 0 |ULTIMATE.start_main_~i~1#1|) (<= |ULTIMATE.start_upsweep_#in~a#1.offset| 0) (<= |ULTIMATE.start_downsweep_~n#1| 2147483647) (not (< 0 |ULTIMATE.start_downsweep_~space#1|)) (<= 0 |ULTIMATE.start_downsweep_~a#1.offset|) (<= |ULTIMATE.start_upsweep_#res#1| 2147483647) (<= 0 (+ |ULTIMATE.start_is_pow2_#in~x#1| 2147483648)) (<= 0 (+ |ULTIMATE.start_upsweep_#res#1| 2147483648)) (= |ULTIMATE.start_check_~sum~0#1| 0) (= |ULTIMATE.start_main_~a0~0#1.base| |ULTIMATE.start_check_#in~a0#1.base|) (= |ULTIMATE.start_check_~i~0#1| 0) (<= 0 (+ |ULTIMATE.start_upsweep_~n#1| 2147483648)) (<= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_downsweep_#in~a#1.offset|) (<= 0 (+ |ULTIMATE.start_downsweep_#in~space#1| 2147483648)) (= |ULTIMATE.start_main_~a~0#1.offset| |ULTIMATE.start_check_#in~a#1.offset|) (= (ite (= |ULTIMATE.start_check_~sum~0#1| (select (select |#memory_int| |ULTIMATE.start_check_~a#1.base|) (+ |ULTIMATE.start_check_~a#1.offset| (* |ULTIMATE.start_check_~i~0#1| 4)))) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (not (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0)) (<= 0 |ULTIMATE.start_main_#t~malloc16#1.offset|) (<= |ULTIMATE.start_downsweep_#in~space#1| 2147483647) (<= |ULTIMATE.start_upsweep_~a#1.offset| 0) (= |ULTIMATE.start_main_~n~0#1| |ULTIMATE.start_check_#in~n#1|) (<= |ULTIMATE.start_is_pow2_#res#1| 1) (<= 0 (+ 2147483648 |ULTIMATE.start_main_~space~1#1|)) (= (select |#valid| |ULTIMATE.start_check_~a#1.base|) 1) (<= |ULTIMATE.start_downsweep_~a#1.offset| 0) (<= 0 (+ |ULTIMATE.start_upsweep_#in~n#1| 2147483648)) (<= |ULTIMATE.start_upsweep_#in~n#1| 2147483647) (<= 0 (+ |ULTIMATE.start_upsweep_~space~0#1| 2147483648)) (<= |ULTIMATE.start_upsweep_~n#1| 2147483647) (<= |#NULL.base| 0) (not (<= (+ (* |ULTIMATE.start_check_~i~0#1| 4) 4 |ULTIMATE.start_check_~a0#1.offset|) (select |#length| |ULTIMATE.start_check_~a0#1.base|))) (<= |ULTIMATE.start_main_#t~malloc15#1.offset| 0) (<= |ULTIMATE.start_upsweep_~space~0#1| 2147483647) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= |ULTIMATE.start_downsweep_#in~n#1| 2147483647) (<= 0 |ULTIMATE.start_main_~a0~0#1.offset|) (<= |ULTIMATE.start_is_pow2_#in~x#1| 2147483647) (<= |ULTIMATE.start_downsweep_#in~a#1.offset| 0) (= |ULTIMATE.start_check_#in~a0#1.offset| |ULTIMATE.start_main_~a0~0#1.offset|) (<= (+ |ULTIMATE.start_check_~a#1.offset| (* |ULTIMATE.start_check_~i~0#1| 4) 4) (select |#length| |ULTIMATE.start_check_~a#1.base|)) (= |ULTIMATE.start_check_~a#1.base| |ULTIMATE.start_check_#in~a#1.base|) (<= |ULTIMATE.start_main_~space~1#1| 2147483647) (<= 0 (+ |ULTIMATE.start_check_~a#1.offset| (* |ULTIMATE.start_check_~i~0#1| 4))) (<= |ULTIMATE.start_main_~a0~0#1.offset| 0) (<= 0 |#NULL.offset|) (<= 0 |ULTIMATE.start_main_#t~malloc15#1.offset|) (<= 0 |#StackHeapBarrier|) (= |ULTIMATE.start_check_#in~a0#1.offset| |ULTIMATE.start_check_~a0#1.offset|) (<= |ULTIMATE.start_main_~a~0#1.offset| 0) (<= |ULTIMATE.start_main_#t~malloc16#1.offset| 0))' at error location [2022-12-14 07:04:41,945 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 07:04:41,945 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 07:04:41,945 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 14 [2022-12-14 07:04:41,945 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1094179251] [2022-12-14 07:04:41,945 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 07:04:41,945 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-12-14 07:04:41,945 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 07:04:41,946 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-12-14 07:04:41,946 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=332, Invalid=2020, Unknown=0, NotChecked=0, Total=2352 [2022-12-14 07:04:41,946 INFO L87 Difference]: Start difference. First operand 158 states and 186 transitions. Second operand has 15 states, 14 states have (on average 6.928571428571429) internal successors, (97), 15 states have internal predecessors, (97), 3 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2022-12-14 07:04:42,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:04:42,191 INFO L93 Difference]: Finished difference Result 165 states and 191 transitions. [2022-12-14 07:04:42,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-14 07:04:42,191 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 6.928571428571429) internal successors, (97), 15 states have internal predecessors, (97), 3 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) Word has length 48 [2022-12-14 07:04:42,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:04:42,192 INFO L225 Difference]: With dead ends: 165 [2022-12-14 07:04:42,192 INFO L226 Difference]: Without dead ends: 165 [2022-12-14 07:04:42,192 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 99 SyntacticMatches, 2 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 828 ImplicationChecksByTransitivity, 6.7s TimeCoverageRelationStatistics Valid=391, Invalid=2471, Unknown=0, NotChecked=0, Total=2862 [2022-12-14 07:04:42,192 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 182 mSDsluCounter, 115 mSDsCounter, 0 mSdLazyCounter, 250 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 182 SdHoareTripleChecker+Valid, 139 SdHoareTripleChecker+Invalid, 252 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 250 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 07:04:42,193 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [182 Valid, 139 Invalid, 252 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 250 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 07:04:42,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2022-12-14 07:04:42,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 161. [2022-12-14 07:04:42,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161 states, 147 states have (on average 1.2312925170068028) internal successors, (181), 154 states have internal predecessors, (181), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-12-14 07:04:42,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 189 transitions. [2022-12-14 07:04:42,195 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 189 transitions. Word has length 48 [2022-12-14 07:04:42,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:04:42,195 INFO L495 AbstractCegarLoop]: Abstraction has 161 states and 189 transitions. [2022-12-14 07:04:42,195 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 6.928571428571429) internal successors, (97), 15 states have internal predecessors, (97), 3 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2022-12-14 07:04:42,195 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 189 transitions. [2022-12-14 07:04:42,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-12-14 07:04:42,195 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:04:42,195 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 07:04:42,200 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68d1f820-b3bd-44ff-981c-6d5644e6ec24/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Ended with exit code 0 [2022-12-14 07:04:42,396 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68d1f820-b3bd-44ff-981c-6d5644e6ec24/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2022-12-14 07:04:42,397 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2022-12-14 07:04:42,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:04:42,398 INFO L85 PathProgramCache]: Analyzing trace with hash -1819322257, now seen corresponding path program 3 times [2022-12-14 07:04:42,398 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 07:04:42,398 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1451975633] [2022-12-14 07:04:42,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:04:42,399 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 07:04:42,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:04:42,536 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 6 proven. 37 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-12-14 07:04:42,536 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 07:04:42,537 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1451975633] [2022-12-14 07:04:42,537 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1451975633] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 07:04:42,537 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1956986470] [2022-12-14 07:04:42,537 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 07:04:42,537 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 07:04:42,537 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68d1f820-b3bd-44ff-981c-6d5644e6ec24/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 07:04:42,537 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68d1f820-b3bd-44ff-981c-6d5644e6ec24/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 07:04:42,538 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68d1f820-b3bd-44ff-981c-6d5644e6ec24/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-12-14 07:04:42,632 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 07:04:42,632 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 07:04:42,633 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 13 conjunts are in the unsatisfiable core [2022-12-14 07:04:42,634 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 07:04:42,708 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 16 proven. 26 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-12-14 07:04:42,708 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 07:04:42,785 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-12-14 07:04:42,785 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1956986470] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 07:04:42,785 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [458897611] [2022-12-14 07:04:42,786 INFO L159 IcfgInterpreter]: Started Sifa with 23 locations of interest [2022-12-14 07:04:42,786 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 07:04:42,786 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 07:04:42,786 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 07:04:42,786 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 07:04:43,001 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 10 treesize of output 9 [2022-12-14 07:04:43,011 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-12-14 07:04:43,038 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 6 [2022-12-14 07:04:43,103 INFO L321 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2022-12-14 07:04:43,104 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 127 treesize of output 127 [2022-12-14 07:04:43,121 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-12-14 07:04:43,122 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 128 treesize of output 130 [2022-12-14 07:04:43,190 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 6 treesize of output 4 [2022-12-14 07:04:43,197 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-12-14 07:04:43,256 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 6 treesize of output 4 [2022-12-14 07:04:43,265 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-12-14 07:04:43,335 INFO L321 Elim1Store]: treesize reduction 38, result has 11.6 percent of original size [2022-12-14 07:04:43,335 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 210 treesize of output 206 [2022-12-14 07:04:43,391 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:04:43,398 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 07:04:43,399 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 25 treesize of output 25 [2022-12-14 07:04:43,433 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:04:43,441 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 07:04:43,441 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 25 treesize of output 25 [2022-12-14 07:04:43,459 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:04:43,468 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 07:04:43,468 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 25 treesize of output 25 [2022-12-14 07:04:43,527 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:04:43,528 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 0 case distinctions, treesize of input 36 treesize of output 28 [2022-12-14 07:04:43,592 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:04:43,593 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 0 case distinctions, treesize of input 36 treesize of output 28 [2022-12-14 07:04:43,661 INFO L321 Elim1Store]: treesize reduction 29, result has 59.7 percent of original size [2022-12-14 07:04:43,661 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 36 treesize of output 56 [2022-12-14 07:04:43,784 INFO L197 IcfgInterpreter]: Interpreting procedure #Ultimate.meminit with input of size 70 for LOIs [2022-12-14 07:04:43,803 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 8 for LOIs [2022-12-14 07:04:43,804 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 07:04:46,198 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '20660#(and (<= 0 |ULTIMATE.start_upsweep_#in~a#1.offset|) (<= |ULTIMATE.start_main_~n~0#1| 2147483647) (<= 0 |ULTIMATE.start_upsweep_~a#1.offset|) (<= 1 |ULTIMATE.start_upsweep_#in~n#1|) (<= 0 |ULTIMATE.start_main_~a~0#1.offset|) (<= 0 |ULTIMATE.start_is_pow2_#res#1|) (<= |ULTIMATE.start_upsweep_#in~a#1.offset| 0) (= |ULTIMATE.start_main_#t~malloc16#1.offset| 0) (<= 0 (+ |ULTIMATE.start_is_pow2_#in~x#1| 2147483648)) (= (select (select |#memory_int| |ULTIMATE.start_upsweep_~a#1.base|) (+ (* 4 |ULTIMATE.start_upsweep_~left~0#1|) |ULTIMATE.start_upsweep_~a#1.offset|)) |ULTIMATE.start_upsweep_#t~mem5#1|) (= |ULTIMATE.start_upsweep_~right~0#1| (+ |ULTIMATE.start_upsweep_~space~0#1| |ULTIMATE.start_upsweep_~left~0#1|)) (<= (+ (* 4 |ULTIMATE.start_upsweep_~left~0#1|) |ULTIMATE.start_upsweep_~a#1.offset| 4) (select |#length| |ULTIMATE.start_upsweep_~a#1.base|)) (<= |ULTIMATE.start_upsweep_~a#1.offset| 0) (<= |ULTIMATE.start_is_pow2_#res#1| 1) (<= |ULTIMATE.start_upsweep_#in~n#1| 2147483647) (<= 0 (+ (* 4 |ULTIMATE.start_upsweep_~left~0#1|) |ULTIMATE.start_upsweep_~a#1.offset|)) (<= 1 |ULTIMATE.start_main_~n~0#1|) (<= 1 |ULTIMATE.start_main_~i~1#1|) (<= |ULTIMATE.start_upsweep_~n#1| 2147483647) (= (select |#valid| |ULTIMATE.start_upsweep_~a#1.base|) 1) (< |ULTIMATE.start_upsweep_~left~0#1| |ULTIMATE.start_upsweep_~n#1|) (<= 0 |ULTIMATE.start_main_~a0~0#1.offset|) (= |#NULL.offset| 0) (<= |ULTIMATE.start_is_pow2_#in~x#1| 2147483647) (= |ULTIMATE.start_main_#t~malloc15#1.offset| 0) (<= |ULTIMATE.start_main_~a0~0#1.offset| 0) (or (not (<= (+ (* |ULTIMATE.start_upsweep_~right~0#1| 4) |ULTIMATE.start_upsweep_~a#1.offset| 4) (select |#length| |ULTIMATE.start_upsweep_~a#1.base|))) (not (<= 0 (+ (* |ULTIMATE.start_upsweep_~right~0#1| 4) |ULTIMATE.start_upsweep_~a#1.offset|)))) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~a~0#1.offset| 0) (= |#NULL.base| 0))' at error location [2022-12-14 07:04:46,198 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 07:04:46,198 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 07:04:46,198 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11] total 22 [2022-12-14 07:04:46,198 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1133150331] [2022-12-14 07:04:46,198 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 07:04:46,199 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-12-14 07:04:46,199 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 07:04:46,199 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-12-14 07:04:46,199 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=195, Invalid=1697, Unknown=0, NotChecked=0, Total=1892 [2022-12-14 07:04:46,199 INFO L87 Difference]: Start difference. First operand 161 states and 189 transitions. Second operand has 22 states, 22 states have (on average 3.272727272727273) internal successors, (72), 22 states have internal predecessors, (72), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-12-14 07:04:46,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:04:46,456 INFO L93 Difference]: Finished difference Result 276 states and 318 transitions. [2022-12-14 07:04:46,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-12-14 07:04:46,456 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.272727272727273) internal successors, (72), 22 states have internal predecessors, (72), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 50 [2022-12-14 07:04:46,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:04:46,457 INFO L225 Difference]: With dead ends: 276 [2022-12-14 07:04:46,457 INFO L226 Difference]: Without dead ends: 276 [2022-12-14 07:04:46,457 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 115 SyntacticMatches, 4 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 785 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=314, Invalid=2442, Unknown=0, NotChecked=0, Total=2756 [2022-12-14 07:04:46,457 INFO L413 NwaCegarLoop]: 47 mSDtfsCounter, 503 mSDsluCounter, 370 mSDsCounter, 0 mSdLazyCounter, 365 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 503 SdHoareTripleChecker+Valid, 417 SdHoareTripleChecker+Invalid, 379 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 365 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 07:04:46,457 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [503 Valid, 417 Invalid, 379 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 365 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 07:04:46,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 276 states. [2022-12-14 07:04:46,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 276 to 171. [2022-12-14 07:04:46,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 states, 157 states have (on average 1.2356687898089171) internal successors, (194), 164 states have internal predecessors, (194), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-12-14 07:04:46,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 202 transitions. [2022-12-14 07:04:46,460 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 202 transitions. Word has length 50 [2022-12-14 07:04:46,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:04:46,460 INFO L495 AbstractCegarLoop]: Abstraction has 171 states and 202 transitions. [2022-12-14 07:04:46,460 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 3.272727272727273) internal successors, (72), 22 states have internal predecessors, (72), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-12-14 07:04:46,460 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 202 transitions. [2022-12-14 07:04:46,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-12-14 07:04:46,460 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:04:46,460 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 07:04:46,465 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68d1f820-b3bd-44ff-981c-6d5644e6ec24/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2022-12-14 07:04:46,661 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45,32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68d1f820-b3bd-44ff-981c-6d5644e6ec24/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 07:04:46,662 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2022-12-14 07:04:46,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:04:46,662 INFO L85 PathProgramCache]: Analyzing trace with hash -175078894, now seen corresponding path program 4 times [2022-12-14 07:04:46,662 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 07:04:46,663 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [864090655] [2022-12-14 07:04:46,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:04:46,663 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 07:04:46,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:04:46,818 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 11 proven. 38 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-12-14 07:04:46,818 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 07:04:46,818 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [864090655] [2022-12-14 07:04:46,818 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [864090655] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 07:04:46,818 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1477356083] [2022-12-14 07:04:46,818 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-14 07:04:46,818 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 07:04:46,818 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68d1f820-b3bd-44ff-981c-6d5644e6ec24/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 07:04:46,819 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68d1f820-b3bd-44ff-981c-6d5644e6ec24/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 07:04:46,819 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68d1f820-b3bd-44ff-981c-6d5644e6ec24/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2022-12-14 07:04:46,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:04:46,915 INFO L263 TraceCheckSpWp]: Trace formula consists of 307 conjuncts, 12 conjunts are in the unsatisfiable core [2022-12-14 07:04:46,916 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 07:04:47,003 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 26 proven. 22 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-12-14 07:04:47,004 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 07:04:47,072 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 11 proven. 37 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-12-14 07:04:47,072 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1477356083] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 07:04:47,073 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2063024423] [2022-12-14 07:04:47,073 INFO L159 IcfgInterpreter]: Started Sifa with 23 locations of interest [2022-12-14 07:04:47,073 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 07:04:47,073 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 07:04:47,073 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 07:04:47,074 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 07:04:47,297 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-12-14 07:04:47,307 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 10 treesize of output 9 [2022-12-14 07:04:47,333 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 6 [2022-12-14 07:04:47,394 INFO L321 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2022-12-14 07:04:47,394 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 127 treesize of output 127 [2022-12-14 07:04:47,411 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-12-14 07:04:47,411 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 128 treesize of output 130 [2022-12-14 07:04:47,475 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 6 treesize of output 4 [2022-12-14 07:04:47,483 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-12-14 07:04:47,537 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 6 treesize of output 4 [2022-12-14 07:04:47,544 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-12-14 07:04:47,581 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 20 [2022-12-14 07:04:47,661 INFO L321 Elim1Store]: treesize reduction 84, result has 9.7 percent of original size [2022-12-14 07:04:47,661 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 259 treesize of output 256 [2022-12-14 07:04:47,714 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:04:47,722 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 07:04:47,722 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 25 treesize of output 25 [2022-12-14 07:04:47,735 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:04:47,742 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 07:04:47,742 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 25 treesize of output 25 [2022-12-14 07:04:47,940 INFO L321 Elim1Store]: treesize reduction 76, result has 31.5 percent of original size [2022-12-14 07:04:47,940 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 282 treesize of output 303 [2022-12-14 07:04:48,143 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:04:48,144 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:04:48,147 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:04:48,166 INFO L321 Elim1Store]: treesize reduction 28, result has 60.6 percent of original size [2022-12-14 07:04:48,166 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 47 treesize of output 70 [2022-12-14 07:04:48,211 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:04:48,212 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:04:48,214 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:04:48,238 INFO L321 Elim1Store]: treesize reduction 28, result has 60.6 percent of original size [2022-12-14 07:04:48,239 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 271 treesize of output 294 [2022-12-14 07:04:48,307 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:04:48,308 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:04:48,326 INFO L321 Elim1Store]: treesize reduction 28, result has 60.6 percent of original size [2022-12-14 07:04:48,327 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 2 case distinctions, treesize of input 49 treesize of output 82 [2022-12-14 07:04:48,384 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:04:48,386 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:04:48,413 INFO L321 Elim1Store]: treesize reduction 28, result has 60.6 percent of original size [2022-12-14 07:04:48,413 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 2 case distinctions, treesize of input 273 treesize of output 306 [2022-12-14 07:04:48,586 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:04:48,587 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 0 case distinctions, treesize of input 36 treesize of output 28 [2022-12-14 07:04:48,634 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:04:48,635 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 0 case distinctions, treesize of input 36 treesize of output 28 [2022-12-14 07:04:48,749 INFO L197 IcfgInterpreter]: Interpreting procedure #Ultimate.meminit with input of size 70 for LOIs [2022-12-14 07:04:48,766 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 8 for LOIs [2022-12-14 07:04:48,767 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 07:04:51,330 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '21471#(and (<= 0 |ULTIMATE.start_upsweep_#in~a#1.offset|) (<= |ULTIMATE.start_main_~n~0#1| 2147483647) (<= 0 |ULTIMATE.start_upsweep_~a#1.offset|) (<= 1 |ULTIMATE.start_upsweep_#in~n#1|) (<= 0 |ULTIMATE.start_main_~a~0#1.offset|) (<= 0 |ULTIMATE.start_is_pow2_#res#1|) (<= |ULTIMATE.start_upsweep_#in~a#1.offset| 0) (= |ULTIMATE.start_main_#t~malloc16#1.offset| 0) (<= 0 (+ |ULTIMATE.start_is_pow2_#in~x#1| 2147483648)) (= (select (select |#memory_int| |ULTIMATE.start_upsweep_~a#1.base|) (+ (* 4 |ULTIMATE.start_upsweep_~left~0#1|) |ULTIMATE.start_upsweep_~a#1.offset|)) |ULTIMATE.start_upsweep_#t~mem5#1|) (= |ULTIMATE.start_upsweep_~right~0#1| (+ |ULTIMATE.start_upsweep_~space~0#1| |ULTIMATE.start_upsweep_~left~0#1|)) (<= (+ (* 4 |ULTIMATE.start_upsweep_~left~0#1|) |ULTIMATE.start_upsweep_~a#1.offset| 4) (select |#length| |ULTIMATE.start_upsweep_~a#1.base|)) (<= |ULTIMATE.start_upsweep_~a#1.offset| 0) (<= |ULTIMATE.start_is_pow2_#res#1| 1) (<= |ULTIMATE.start_upsweep_#in~n#1| 2147483647) (<= 0 (+ (* 4 |ULTIMATE.start_upsweep_~left~0#1|) |ULTIMATE.start_upsweep_~a#1.offset|)) (<= 1 |ULTIMATE.start_main_~n~0#1|) (<= 1 |ULTIMATE.start_main_~i~1#1|) (<= |ULTIMATE.start_upsweep_~n#1| 2147483647) (= (select |#valid| |ULTIMATE.start_upsweep_~a#1.base|) 1) (< |ULTIMATE.start_upsweep_~left~0#1| |ULTIMATE.start_upsweep_~n#1|) (<= 0 |ULTIMATE.start_main_~a0~0#1.offset|) (= |#NULL.offset| 0) (<= |ULTIMATE.start_is_pow2_#in~x#1| 2147483647) (= |ULTIMATE.start_main_#t~malloc15#1.offset| 0) (<= |ULTIMATE.start_main_~a0~0#1.offset| 0) (not (<= (+ (* |ULTIMATE.start_upsweep_~right~0#1| 4) |ULTIMATE.start_upsweep_~a#1.offset| 4) (select |#length| |ULTIMATE.start_upsweep_~a#1.base|))) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~a~0#1.offset| 0) (= |#NULL.base| 0))' at error location [2022-12-14 07:04:51,330 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 07:04:51,330 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 07:04:51,330 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 10] total 18 [2022-12-14 07:04:51,330 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1964663757] [2022-12-14 07:04:51,330 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 07:04:51,330 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-12-14 07:04:51,330 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 07:04:51,331 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-12-14 07:04:51,331 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=1394, Unknown=0, NotChecked=0, Total=1560 [2022-12-14 07:04:51,331 INFO L87 Difference]: Start difference. First operand 171 states and 202 transitions. Second operand has 18 states, 18 states have (on average 3.9444444444444446) internal successors, (71), 18 states have internal predecessors, (71), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-12-14 07:04:51,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:04:51,643 INFO L93 Difference]: Finished difference Result 268 states and 309 transitions. [2022-12-14 07:04:51,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-12-14 07:04:51,643 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.9444444444444446) internal successors, (71), 18 states have internal predecessors, (71), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 52 [2022-12-14 07:04:51,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:04:51,644 INFO L225 Difference]: With dead ends: 268 [2022-12-14 07:04:51,644 INFO L226 Difference]: Without dead ends: 268 [2022-12-14 07:04:51,644 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 123 SyntacticMatches, 6 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 731 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=311, Invalid=2341, Unknown=0, NotChecked=0, Total=2652 [2022-12-14 07:04:51,644 INFO L413 NwaCegarLoop]: 47 mSDtfsCounter, 354 mSDsluCounter, 379 mSDsCounter, 0 mSdLazyCounter, 375 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 354 SdHoareTripleChecker+Valid, 426 SdHoareTripleChecker+Invalid, 382 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 375 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 07:04:51,644 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [354 Valid, 426 Invalid, 382 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 375 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 07:04:51,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 268 states. [2022-12-14 07:04:51,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 268 to 168. [2022-12-14 07:04:51,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168 states, 154 states have (on average 1.2272727272727273) internal successors, (189), 161 states have internal predecessors, (189), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-12-14 07:04:51,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 197 transitions. [2022-12-14 07:04:51,647 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 197 transitions. Word has length 52 [2022-12-14 07:04:51,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:04:51,647 INFO L495 AbstractCegarLoop]: Abstraction has 168 states and 197 transitions. [2022-12-14 07:04:51,647 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.9444444444444446) internal successors, (71), 18 states have internal predecessors, (71), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-12-14 07:04:51,647 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 197 transitions. [2022-12-14 07:04:51,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-12-14 07:04:51,647 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:04:51,647 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 07:04:51,652 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68d1f820-b3bd-44ff-981c-6d5644e6ec24/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Ended with exit code 0 [2022-12-14 07:04:51,847 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68d1f820-b3bd-44ff-981c-6d5644e6ec24/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2022-12-14 07:04:51,848 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2022-12-14 07:04:51,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:04:51,848 INFO L85 PathProgramCache]: Analyzing trace with hash 1279548468, now seen corresponding path program 1 times [2022-12-14 07:04:51,848 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 07:04:51,848 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [53260728] [2022-12-14 07:04:51,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:04:51,848 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 07:04:51,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:04:54,211 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 1 proven. 14 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-14 07:04:54,211 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 07:04:54,211 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [53260728] [2022-12-14 07:04:54,212 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [53260728] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 07:04:54,212 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [611589584] [2022-12-14 07:04:54,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:04:54,212 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 07:04:54,212 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68d1f820-b3bd-44ff-981c-6d5644e6ec24/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 07:04:54,213 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68d1f820-b3bd-44ff-981c-6d5644e6ec24/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 07:04:54,213 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68d1f820-b3bd-44ff-981c-6d5644e6ec24/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2022-12-14 07:04:54,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:04:54,319 INFO L263 TraceCheckSpWp]: Trace formula consists of 342 conjuncts, 128 conjunts are in the unsatisfiable core [2022-12-14 07:04:54,323 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 07:04:54,326 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-12-14 07:04:54,373 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 6 [2022-12-14 07:04:54,445 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-12-14 07:04:54,445 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-12-14 07:04:54,492 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_1051 (Array Int Int))) (= (store |c_old(#memory_int)| |c_#Ultimate.meminit_#ptr.base| v_ArrVal_1051) |c_#memory_int|)) is different from true [2022-12-14 07:04:54,497 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 13 treesize of output 15 [2022-12-14 07:04:54,615 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 0 case distinctions, treesize of input 22 treesize of output 20 [2022-12-14 07:04:54,620 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 11 treesize of output 10 [2022-12-14 07:04:54,756 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 0 case distinctions, treesize of input 32 treesize of output 30 [2022-12-14 07:04:54,768 INFO L321 Elim1Store]: treesize reduction 21, result has 25.0 percent of original size [2022-12-14 07:04:54,768 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 25 [2022-12-14 07:04:55,102 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 0 case distinctions, treesize of input 32 treesize of output 30 [2022-12-14 07:04:55,405 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 38 [2022-12-14 07:04:56,224 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 79 treesize of output 71 [2022-12-14 07:04:56,492 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 108 treesize of output 106 [2022-12-14 07:05:01,660 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 141 treesize of output 123 [2022-12-14 07:05:01,666 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 63 treesize of output 57 [2022-12-14 07:05:01,737 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 3 trivial. 1 not checked. [2022-12-14 07:05:01,737 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 07:08:55,287 WARN L837 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_upsweep_~right~0#1_72| Int) (v_ArrVal_1054 Int) (|v_ULTIMATE.start_upsweep_~a#1.offset_39| Int) (v_ArrVal_1056 Int) (|ULTIMATE.start_main_~a0~0#1.offset| Int) (v_ArrVal_1058 Int) (|v_ULTIMATE.start_downsweep_~n#1_29| Int) (|v_ULTIMATE.start_main_~i~1#1_255| Int)) (let ((.cse1 (store |c_#memory_int| |c_ULTIMATE.start_main_~a0~0#1.base| (store (store (select |c_#memory_int| |c_ULTIMATE.start_main_~a0~0#1.base|) (+ |ULTIMATE.start_main_~a0~0#1.offset| (* |c_ULTIMATE.start_main_~i~1#1| 4)) |c_ULTIMATE.start_main_#t~mem18#1|) (+ (* 4 |v_ULTIMATE.start_main_~i~1#1_255|) |ULTIMATE.start_main_~a0~0#1.offset|) v_ArrVal_1054)))) (let ((.cse2 (store (store (select .cse1 |c_ULTIMATE.start_main_~a~0#1.base|) (+ (* |v_ULTIMATE.start_upsweep_~right~0#1_72| 4) |v_ULTIMATE.start_upsweep_~a#1.offset_39|) v_ArrVal_1056) (+ (* |v_ULTIMATE.start_downsweep_~n#1_29| 4) (- 4) |c_ULTIMATE.start_main_~a~0#1.offset|) v_ArrVal_1058)) (.cse3 (+ |c_ULTIMATE.start_main_~a~0#1.offset| 4))) (let ((.cse0 (select .cse2 .cse3))) (or (< |v_ULTIMATE.start_upsweep_~a#1.offset_39| |c_ULTIMATE.start_main_~a~0#1.offset|) (not (= .cse0 0)) (< |v_ULTIMATE.start_upsweep_~right~0#1_72| 1) (< |v_ULTIMATE.start_downsweep_~n#1_29| (+ 1 |v_ULTIMATE.start_main_~i~1#1_255|)) (let ((.cse4 (+ .cse0 (select .cse2 |c_ULTIMATE.start_main_~a~0#1.offset|)))) (= (select (select (store .cse1 |c_ULTIMATE.start_main_~a~0#1.base| (store (store .cse2 .cse3 .cse4) |c_ULTIMATE.start_main_~a~0#1.offset| .cse0)) |c_ULTIMATE.start_main_~a0~0#1.base|) |ULTIMATE.start_main_~a0~0#1.offset|) .cse4)) (not (<= (+ |c_ULTIMATE.start_main_~i~1#1| 1) |v_ULTIMATE.start_main_~i~1#1_255|))))))) is different from false [2022-12-14 07:08:57,379 WARN L837 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_upsweep_~right~0#1_72| Int) (v_ArrVal_1054 Int) (|v_ULTIMATE.start_upsweep_~a#1.offset_39| Int) (v_ArrVal_1056 Int) (|ULTIMATE.start_main_~a0~0#1.offset| Int) (v_ArrVal_1058 Int) (|v_ULTIMATE.start_downsweep_~n#1_29| Int) (|v_ULTIMATE.start_main_~i~1#1_255| Int)) (let ((.cse1 (store |c_#memory_int| |c_ULTIMATE.start_main_~a0~0#1.base| (store (let ((.cse5 (* |c_ULTIMATE.start_main_~i~1#1| 4))) (store (select |c_#memory_int| |c_ULTIMATE.start_main_~a0~0#1.base|) (+ |ULTIMATE.start_main_~a0~0#1.offset| .cse5) (select (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) (+ |c_ULTIMATE.start_main_~a~0#1.offset| .cse5)))) (+ (* 4 |v_ULTIMATE.start_main_~i~1#1_255|) |ULTIMATE.start_main_~a0~0#1.offset|) v_ArrVal_1054)))) (let ((.cse2 (store (store (select .cse1 |c_ULTIMATE.start_main_~a~0#1.base|) (+ (* |v_ULTIMATE.start_upsweep_~right~0#1_72| 4) |v_ULTIMATE.start_upsweep_~a#1.offset_39|) v_ArrVal_1056) (+ (* |v_ULTIMATE.start_downsweep_~n#1_29| 4) (- 4) |c_ULTIMATE.start_main_~a~0#1.offset|) v_ArrVal_1058)) (.cse3 (+ |c_ULTIMATE.start_main_~a~0#1.offset| 4))) (let ((.cse4 (select .cse2 .cse3))) (or (< |v_ULTIMATE.start_upsweep_~a#1.offset_39| |c_ULTIMATE.start_main_~a~0#1.offset|) (let ((.cse0 (+ .cse4 (select .cse2 |c_ULTIMATE.start_main_~a~0#1.offset|)))) (= .cse0 (select (select (store .cse1 |c_ULTIMATE.start_main_~a~0#1.base| (store (store .cse2 .cse3 .cse0) |c_ULTIMATE.start_main_~a~0#1.offset| .cse4)) |c_ULTIMATE.start_main_~a0~0#1.base|) |ULTIMATE.start_main_~a0~0#1.offset|))) (< |v_ULTIMATE.start_upsweep_~right~0#1_72| 1) (< |v_ULTIMATE.start_downsweep_~n#1_29| (+ 1 |v_ULTIMATE.start_main_~i~1#1_255|)) (not (= .cse4 0)) (not (<= (+ |c_ULTIMATE.start_main_~i~1#1| 1) |v_ULTIMATE.start_main_~i~1#1_255|))))))) is different from false [2022-12-14 07:09:11,009 WARN L837 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_upsweep_~right~0#1_72| Int) (v_ArrVal_1054 Int) (|v_ULTIMATE.start_upsweep_~a#1.offset_39| Int) (v_ArrVal_1056 Int) (|ULTIMATE.start_main_~a0~0#1.offset| Int) (v_ArrVal_1058 Int) (v_ArrVal_1066 (Array Int Int)) (|v_ULTIMATE.start_downsweep_~n#1_29| Int) (|v_ULTIMATE.start_main_~i~1#1_255| Int)) (let ((.cse2 (store |c_#memory_int| |c_ULTIMATE.start_main_#t~malloc16#1.base| (store (store v_ArrVal_1066 |ULTIMATE.start_main_~a0~0#1.offset| (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_#t~malloc16#1.base| v_ArrVal_1066) |c_ULTIMATE.start_main_~a~0#1.base|) |c_ULTIMATE.start_main_~a~0#1.offset|)) (+ (* 4 |v_ULTIMATE.start_main_~i~1#1_255|) |ULTIMATE.start_main_~a0~0#1.offset|) v_ArrVal_1054)))) (let ((.cse3 (store (store (select .cse2 |c_ULTIMATE.start_main_~a~0#1.base|) (+ (* |v_ULTIMATE.start_upsweep_~right~0#1_72| 4) |v_ULTIMATE.start_upsweep_~a#1.offset_39|) v_ArrVal_1056) (+ (* |v_ULTIMATE.start_downsweep_~n#1_29| 4) (- 4) |c_ULTIMATE.start_main_~a~0#1.offset|) v_ArrVal_1058)) (.cse4 (+ |c_ULTIMATE.start_main_~a~0#1.offset| 4))) (let ((.cse0 (select .cse3 .cse4))) (or (< |v_ULTIMATE.start_upsweep_~a#1.offset_39| |c_ULTIMATE.start_main_~a~0#1.offset|) (< |v_ULTIMATE.start_upsweep_~right~0#1_72| 1) (not (= .cse0 0)) (< |v_ULTIMATE.start_downsweep_~n#1_29| (+ 1 |v_ULTIMATE.start_main_~i~1#1_255|)) (let ((.cse1 (+ .cse0 (select .cse3 |c_ULTIMATE.start_main_~a~0#1.offset|)))) (= .cse1 (select (select (store .cse2 |c_ULTIMATE.start_main_~a~0#1.base| (store (store .cse3 .cse4 .cse1) |c_ULTIMATE.start_main_~a~0#1.offset| .cse0)) |c_ULTIMATE.start_main_#t~malloc16#1.base|) |ULTIMATE.start_main_~a0~0#1.offset|))) (not (<= 1 |v_ULTIMATE.start_main_~i~1#1_255|))))))) is different from false [2022-12-14 07:09:11,013 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [611589584] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 07:09:11,013 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1550233499] [2022-12-14 07:09:11,014 INFO L159 IcfgInterpreter]: Started Sifa with 37 locations of interest [2022-12-14 07:09:11,014 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 07:09:11,014 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 07:09:11,015 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 07:09:11,015 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 07:09:11,347 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-12-14 07:09:11,352 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 10 treesize of output 9 [2022-12-14 07:09:11,375 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 6 [2022-12-14 07:09:11,438 INFO L321 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2022-12-14 07:09:11,438 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 127 treesize of output 127 [2022-12-14 07:09:11,459 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-12-14 07:09:11,459 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 128 treesize of output 130 [2022-12-14 07:09:11,528 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 6 treesize of output 4 [2022-12-14 07:09:11,536 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-12-14 07:09:11,608 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 6 treesize of output 4 [2022-12-14 07:09:11,615 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-12-14 07:09:11,652 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 20 [2022-12-14 07:09:11,723 INFO L321 Elim1Store]: treesize reduction 84, result has 9.7 percent of original size [2022-12-14 07:09:11,723 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 259 treesize of output 256 [2022-12-14 07:09:11,773 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:09:11,783 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 07:09:11,783 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 25 treesize of output 25 [2022-12-14 07:09:11,801 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:09:11,811 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 07:09:11,811 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 25 treesize of output 25 [2022-12-14 07:09:12,054 INFO L321 Elim1Store]: treesize reduction 76, result has 31.5 percent of original size [2022-12-14 07:09:12,054 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 282 treesize of output 303 [2022-12-14 07:09:12,287 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:09:12,288 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:09:12,313 INFO L321 Elim1Store]: treesize reduction 28, result has 60.6 percent of original size [2022-12-14 07:09:12,313 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 2 case distinctions, treesize of input 49 treesize of output 82 [2022-12-14 07:09:12,342 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:09:12,343 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:09:12,378 INFO L321 Elim1Store]: treesize reduction 28, result has 60.6 percent of original size [2022-12-14 07:09:12,378 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 2 case distinctions, treesize of input 273 treesize of output 306 [2022-12-14 07:09:12,529 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:09:12,530 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:09:12,531 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:09:12,532 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:09:12,558 INFO L321 Elim1Store]: treesize reduction 28, result has 60.6 percent of original size [2022-12-14 07:09:12,558 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 47 treesize of output 70 [2022-12-14 07:09:12,597 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:09:12,599 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:09:12,600 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:09:12,600 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:09:12,632 INFO L321 Elim1Store]: treesize reduction 28, result has 60.6 percent of original size [2022-12-14 07:09:12,632 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 271 treesize of output 294 [2022-12-14 07:09:12,797 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:09:12,798 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 0 case distinctions, treesize of input 36 treesize of output 28 [2022-12-14 07:09:12,848 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:09:12,849 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 0 case distinctions, treesize of input 36 treesize of output 28 [2022-12-14 07:09:12,911 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 07:09:12,999 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:09:13,000 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:09:13,027 INFO L321 Elim1Store]: treesize reduction 25, result has 59.7 percent of original size [2022-12-14 07:09:13,027 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 2 case distinctions, treesize of input 57 treesize of output 67 [2022-12-14 07:09:13,082 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:09:13,083 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:09:13,090 INFO L321 Elim1Store]: treesize reduction 17, result has 5.6 percent of original size [2022-12-14 07:09:13,090 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 1 case distinctions, treesize of input 66 treesize of output 60 [2022-12-14 07:09:13,209 INFO L321 Elim1Store]: treesize reduction 22, result has 59.3 percent of original size [2022-12-14 07:09:13,210 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 33 treesize of output 45 [2022-12-14 07:09:13,277 INFO L321 Elim1Store]: treesize reduction 27, result has 61.4 percent of original size [2022-12-14 07:09:13,277 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 69 treesize of output 77 [2022-12-14 07:09:13,384 INFO L321 Elim1Store]: treesize reduction 22, result has 59.3 percent of original size [2022-12-14 07:09:13,384 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 33 treesize of output 45 [2022-12-14 07:09:13,438 INFO L321 Elim1Store]: treesize reduction 27, result has 61.4 percent of original size [2022-12-14 07:09:13,438 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 69 treesize of output 77 [2022-12-14 07:09:13,542 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:09:13,543 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 0 case distinctions, treesize of input 45 treesize of output 28 [2022-12-14 07:09:13,581 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:09:13,581 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 0 case distinctions, treesize of input 40 treesize of output 31 [2022-12-14 07:09:13,689 INFO L321 Elim1Store]: treesize reduction 43, result has 20.4 percent of original size [2022-12-14 07:09:13,689 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 158 treesize of output 133 [2022-12-14 07:09:13,755 INFO L321 Elim1Store]: treesize reduction 56, result has 20.0 percent of original size [2022-12-14 07:09:13,755 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 178 treesize of output 150 [2022-12-14 07:09:13,919 INFO L321 Elim1Store]: treesize reduction 22, result has 59.3 percent of original size [2022-12-14 07:09:13,919 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 33 treesize of output 45 [2022-12-14 07:09:13,968 INFO L321 Elim1Store]: treesize reduction 27, result has 61.4 percent of original size [2022-12-14 07:09:13,969 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 69 treesize of output 77 [2022-12-14 07:09:14,060 INFO L321 Elim1Store]: treesize reduction 22, result has 59.3 percent of original size [2022-12-14 07:09:14,060 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 45 [2022-12-14 07:09:14,119 INFO L321 Elim1Store]: treesize reduction 27, result has 61.4 percent of original size [2022-12-14 07:09:14,119 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 69 treesize of output 77 [2022-12-14 07:09:14,378 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:09:14,378 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 0 case distinctions, treesize of input 45 treesize of output 28 [2022-12-14 07:09:14,410 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:09:14,411 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 0 case distinctions, treesize of input 40 treesize of output 31 [2022-12-14 07:09:14,531 INFO L321 Elim1Store]: treesize reduction 43, result has 20.4 percent of original size [2022-12-14 07:09:14,532 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 2 new quantified variables, introduced 2 case distinctions, treesize of input 172 treesize of output 147 [2022-12-14 07:09:14,596 INFO L321 Elim1Store]: treesize reduction 56, result has 20.0 percent of original size [2022-12-14 07:09:14,596 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 2 case distinctions, treesize of input 192 treesize of output 164 [2022-12-14 07:09:14,748 INFO L321 Elim1Store]: treesize reduction 22, result has 59.3 percent of original size [2022-12-14 07:09:14,749 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 33 treesize of output 45 [2022-12-14 07:09:14,803 INFO L321 Elim1Store]: treesize reduction 27, result has 61.4 percent of original size [2022-12-14 07:09:14,804 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 69 treesize of output 77 [2022-12-14 07:09:14,911 INFO L321 Elim1Store]: treesize reduction 22, result has 59.3 percent of original size [2022-12-14 07:09:14,911 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 33 treesize of output 45 [2022-12-14 07:09:14,968 INFO L321 Elim1Store]: treesize reduction 27, result has 61.4 percent of original size [2022-12-14 07:09:14,969 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 69 treesize of output 77 [2022-12-14 07:09:15,730 INFO L197 IcfgInterpreter]: Interpreting procedure #Ultimate.meminit with input of size 70 for LOIs [2022-12-14 07:09:15,747 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 8 for LOIs [2022-12-14 07:09:15,747 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 07:09:31,736 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '22296#(and (<= 0 |ULTIMATE.start_upsweep_#in~a#1.offset|) (<= |ULTIMATE.start_main_~n~0#1| 2147483647) (<= |ULTIMATE.start_check_~n#1| 2147483647) (<= 0 |ULTIMATE.start_upsweep_~a#1.offset|) (<= 0 (+ |ULTIMATE.start_downsweep_~n#1| 2147483648)) (= (ite (= |ULTIMATE.start_check_#t~mem11#1| |ULTIMATE.start_check_~sum~0#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 (+ |ULTIMATE.start_downsweep_#in~n#1| 2147483648)) (<= |ULTIMATE.start_downsweep_~space#1| 0) (<= 0 |ULTIMATE.start_main_~a~0#1.offset|) (<= 0 |ULTIMATE.start_is_pow2_#res#1|) (<= 0 |ULTIMATE.start_main_~i~1#1|) (<= |ULTIMATE.start_upsweep_#in~a#1.offset| 0) (<= |ULTIMATE.start_downsweep_~n#1| 2147483647) (<= 0 |ULTIMATE.start_downsweep_~a#1.offset|) (= |ULTIMATE.start_main_#t~malloc16#1.offset| 0) (<= |ULTIMATE.start_upsweep_#res#1| 2147483647) (<= 0 (+ |ULTIMATE.start_is_pow2_#in~x#1| 2147483648)) (<= 0 |ULTIMATE.start_check_~n#1|) (<= 0 (+ |ULTIMATE.start_upsweep_#res#1| 2147483648)) (<= |ULTIMATE.start_check_#in~a0#1.offset| 0) (<= 0 (+ |ULTIMATE.start_upsweep_~n#1| 2147483648)) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= |ULTIMATE.start_check_~a0#1.offset| 0) (= |ULTIMATE.start_check_#t~mem11#1| (select (select |#memory_int| |ULTIMATE.start_check_~a#1.base|) (+ |ULTIMATE.start_check_~a#1.offset| (* |ULTIMATE.start_check_~i~0#1| 4)))) (<= 0 |ULTIMATE.start_downsweep_#in~a#1.offset|) (<= 0 (+ |ULTIMATE.start_downsweep_#in~space#1| 2147483648)) (<= |ULTIMATE.start_downsweep_#in~space#1| 2147483647) (<= |ULTIMATE.start_check_#in~a#1.offset| 0) (<= |ULTIMATE.start_upsweep_~a#1.offset| 0) (<= |ULTIMATE.start_is_pow2_#res#1| 1) (<= 0 (+ 2147483648 |ULTIMATE.start_main_~space~1#1|)) (= (select |#valid| |ULTIMATE.start_check_~a#1.base|) 1) (<= |ULTIMATE.start_downsweep_~a#1.offset| 0) (<= 0 (+ |ULTIMATE.start_upsweep_#in~n#1| 2147483648)) (<= |ULTIMATE.start_upsweep_#in~n#1| 2147483647) (<= 0 (+ |ULTIMATE.start_upsweep_~space~0#1| 2147483648)) (<= |ULTIMATE.start_upsweep_~n#1| 2147483647) (<= |ULTIMATE.start_check_~a#1.offset| 0) (<= |ULTIMATE.start_main_#t~malloc15#1.offset| 0) (<= |ULTIMATE.start_upsweep_~space~0#1| 2147483647) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= |ULTIMATE.start_downsweep_#in~n#1| 2147483647) (<= 0 |ULTIMATE.start_main_~a0~0#1.offset|) (= |#NULL.offset| 0) (<= |ULTIMATE.start_is_pow2_#in~x#1| 2147483647) (<= |ULTIMATE.start_downsweep_#in~a#1.offset| 0) (<= |ULTIMATE.start_check_#in~n#1| 2147483647) (<= (+ |ULTIMATE.start_check_~a#1.offset| (* |ULTIMATE.start_check_~i~0#1| 4) 4) (select |#length| |ULTIMATE.start_check_~a#1.base|)) (<= 0 |ULTIMATE.start_check_~a0#1.offset|) (<= |ULTIMATE.start_main_~space~1#1| 2147483647) (<= 0 (+ |ULTIMATE.start_check_~a#1.offset| (* |ULTIMATE.start_check_~i~0#1| 4))) (<= 0 |ULTIMATE.start_check_~a#1.offset|) (<= |ULTIMATE.start_main_~a0~0#1.offset| 0) (<= 0 |ULTIMATE.start_check_#in~n#1|) (<= 0 |ULTIMATE.start_main_~n~0#1|) (<= 0 |ULTIMATE.start_main_#t~malloc15#1.offset|) (<= 0 |ULTIMATE.start_check_#in~a0#1.offset|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~a~0#1.offset| 0) (<= 0 |ULTIMATE.start_check_#in~a#1.offset|) (= |#NULL.base| 0))' at error location [2022-12-14 07:09:31,736 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 07:09:31,736 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-14 07:09:31,736 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 33] total 60 [2022-12-14 07:09:31,736 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1284878893] [2022-12-14 07:09:31,736 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-14 07:09:31,736 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 60 states [2022-12-14 07:09:31,736 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 07:09:31,737 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2022-12-14 07:09:31,739 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=615, Invalid=12646, Unknown=95, NotChecked=924, Total=14280 [2022-12-14 07:09:31,739 INFO L87 Difference]: Start difference. First operand 168 states and 197 transitions. Second operand has 60 states, 55 states have (on average 1.4727272727272727) internal successors, (81), 57 states have internal predecessors, (81), 4 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2022-12-14 07:09:45,353 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 07:09:47,801 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 07:10:00,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:10:00,829 INFO L93 Difference]: Finished difference Result 198 states and 227 transitions. [2022-12-14 07:10:00,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-12-14 07:10:00,830 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 55 states have (on average 1.4727272727272727) internal successors, (81), 57 states have internal predecessors, (81), 4 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) Word has length 52 [2022-12-14 07:10:00,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:10:00,831 INFO L225 Difference]: With dead ends: 198 [2022-12-14 07:10:00,831 INFO L226 Difference]: Without dead ends: 198 [2022-12-14 07:10:00,833 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 216 GetRequests, 55 SyntacticMatches, 1 SemanticMatches, 160 ConstructedPredicates, 4 IntricatePredicates, 0 DeprecatedPredicates, 7280 ImplicationChecksByTransitivity, 294.7s TimeCoverageRelationStatistics Valid=1770, Invalid=22953, Unknown=99, NotChecked=1260, Total=26082 [2022-12-14 07:10:00,833 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 682 mSDsluCounter, 525 mSDsCounter, 0 mSdLazyCounter, 2183 mSolverCounterSat, 73 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 684 SdHoareTripleChecker+Valid, 544 SdHoareTripleChecker+Invalid, 2346 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 2183 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 88 IncrementalHoareTripleChecker+Unchecked, 6.4s IncrementalHoareTripleChecker+Time [2022-12-14 07:10:00,833 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [684 Valid, 544 Invalid, 2346 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [73 Valid, 2183 Invalid, 2 Unknown, 88 Unchecked, 6.4s Time] [2022-12-14 07:10:00,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2022-12-14 07:10:00,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 164. [2022-12-14 07:10:00,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 164 states, 150 states have (on average 1.22) internal successors, (183), 157 states have internal predecessors, (183), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-12-14 07:10:00,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 191 transitions. [2022-12-14 07:10:00,835 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 191 transitions. Word has length 52 [2022-12-14 07:10:00,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:10:00,835 INFO L495 AbstractCegarLoop]: Abstraction has 164 states and 191 transitions. [2022-12-14 07:10:00,836 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 60 states, 55 states have (on average 1.4727272727272727) internal successors, (81), 57 states have internal predecessors, (81), 4 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2022-12-14 07:10:00,836 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 191 transitions. [2022-12-14 07:10:00,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-12-14 07:10:00,836 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:10:00,836 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 07:10:00,842 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68d1f820-b3bd-44ff-981c-6d5644e6ec24/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Ended with exit code 0 [2022-12-14 07:10:01,037 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68d1f820-b3bd-44ff-981c-6d5644e6ec24/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2022-12-14 07:10:01,038 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2022-12-14 07:10:01,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:10:01,039 INFO L85 PathProgramCache]: Analyzing trace with hash 1965739975, now seen corresponding path program 2 times [2022-12-14 07:10:01,039 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 07:10:01,039 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1979710065] [2022-12-14 07:10:01,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:10:01,040 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 07:10:01,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:10:01,148 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2022-12-14 07:10:01,149 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 07:10:01,149 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1979710065] [2022-12-14 07:10:01,149 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1979710065] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 07:10:01,149 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1134592004] [2022-12-14 07:10:01,149 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 07:10:01,149 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 07:10:01,149 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68d1f820-b3bd-44ff-981c-6d5644e6ec24/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 07:10:01,150 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68d1f820-b3bd-44ff-981c-6d5644e6ec24/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 07:10:01,151 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68d1f820-b3bd-44ff-981c-6d5644e6ec24/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2022-12-14 07:10:01,229 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-12-14 07:10:01,229 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 07:10:01,230 INFO L263 TraceCheckSpWp]: Trace formula consists of 236 conjuncts, 11 conjunts are in the unsatisfiable core [2022-12-14 07:10:01,234 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 07:10:01,341 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-12-14 07:10:01,341 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 07:10:01,442 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-12-14 07:10:01,442 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1134592004] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 07:10:01,442 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [129060674] [2022-12-14 07:10:01,443 INFO L159 IcfgInterpreter]: Started Sifa with 31 locations of interest [2022-12-14 07:10:01,443 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 07:10:01,443 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 07:10:01,443 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 07:10:01,443 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 07:10:01,693 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 10 treesize of output 9 [2022-12-14 07:10:01,701 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-12-14 07:10:01,734 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 6 [2022-12-14 07:10:01,801 INFO L321 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2022-12-14 07:10:01,802 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 127 treesize of output 127 [2022-12-14 07:10:01,821 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-12-14 07:10:01,821 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 128 treesize of output 130 [2022-12-14 07:10:01,888 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 6 treesize of output 4 [2022-12-14 07:10:01,896 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-12-14 07:10:01,962 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 6 treesize of output 4 [2022-12-14 07:10:01,971 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-12-14 07:10:02,057 INFO L321 Elim1Store]: treesize reduction 38, result has 11.6 percent of original size [2022-12-14 07:10:02,058 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 210 treesize of output 206 [2022-12-14 07:10:02,121 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:10:02,132 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 07:10:02,132 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 25 treesize of output 25 [2022-12-14 07:10:02,166 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:10:02,174 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 07:10:02,175 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 25 treesize of output 25 [2022-12-14 07:10:02,192 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:10:02,201 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 07:10:02,202 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 25 treesize of output 25 [2022-12-14 07:10:02,274 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:10:02,274 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 0 case distinctions, treesize of input 36 treesize of output 28 [2022-12-14 07:10:02,380 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:10:02,381 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 0 case distinctions, treesize of input 36 treesize of output 28 [2022-12-14 07:10:02,471 INFO L321 Elim1Store]: treesize reduction 29, result has 59.7 percent of original size [2022-12-14 07:10:02,472 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 36 treesize of output 56 [2022-12-14 07:10:02,533 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 07:10:02,635 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:10:02,636 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:10:02,665 INFO L321 Elim1Store]: treesize reduction 25, result has 59.7 percent of original size [2022-12-14 07:10:02,665 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 2 case distinctions, treesize of input 57 treesize of output 67 [2022-12-14 07:10:02,717 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:10:02,718 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:10:02,724 INFO L321 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2022-12-14 07:10:02,725 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 1 case distinctions, treesize of input 65 treesize of output 59 [2022-12-14 07:10:02,832 INFO L321 Elim1Store]: treesize reduction 22, result has 59.3 percent of original size [2022-12-14 07:10:02,832 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 33 treesize of output 45 [2022-12-14 07:10:02,890 INFO L321 Elim1Store]: treesize reduction 27, result has 61.4 percent of original size [2022-12-14 07:10:02,890 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 69 treesize of output 77 [2022-12-14 07:10:03,013 INFO L321 Elim1Store]: treesize reduction 22, result has 59.3 percent of original size [2022-12-14 07:10:03,013 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 33 treesize of output 45 [2022-12-14 07:10:03,066 INFO L321 Elim1Store]: treesize reduction 27, result has 61.4 percent of original size [2022-12-14 07:10:03,066 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 69 treesize of output 77 [2022-12-14 07:10:03,240 INFO L197 IcfgInterpreter]: Interpreting procedure #Ultimate.meminit with input of size 70 for LOIs [2022-12-14 07:10:03,260 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 8 for LOIs [2022-12-14 07:10:03,261 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 07:10:08,075 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '23107#(and (<= 0 |ULTIMATE.start_upsweep_#in~a#1.offset|) (<= |ULTIMATE.start_main_~n~0#1| 2147483647) (<= 0 |ULTIMATE.start_upsweep_~a#1.offset|) (<= 0 (+ |ULTIMATE.start_main_~n~0#1| 1)) (<= 0 |ULTIMATE.start_main_~a~0#1.offset|) (<= |ULTIMATE.start_downsweep_~left~1#1| 2147483647) (<= 0 |ULTIMATE.start_is_pow2_#res#1|) (<= 0 |ULTIMATE.start_main_~i~1#1|) (or (not (<= (+ |ULTIMATE.start_downsweep_~a#1.offset| 4 (* |ULTIMATE.start_downsweep_~right~1#1| 4)) (select |#length| |ULTIMATE.start_downsweep_~a#1.base|))) (not (<= 0 (+ |ULTIMATE.start_downsweep_~a#1.offset| (* |ULTIMATE.start_downsweep_~right~1#1| 4))))) (<= |ULTIMATE.start_upsweep_#in~a#1.offset| 0) (<= 0 (+ |ULTIMATE.start_downsweep_~n#1| 1)) (<= |ULTIMATE.start_downsweep_~n#1| 2147483647) (<= 0 (+ |ULTIMATE.start_downsweep_#in~n#1| 1)) (<= 0 |ULTIMATE.start_downsweep_~a#1.offset|) (= |ULTIMATE.start_main_#t~malloc16#1.offset| 0) (<= |ULTIMATE.start_upsweep_#res#1| 2147483647) (<= 0 (+ |ULTIMATE.start_is_pow2_#in~x#1| 2147483648)) (<= 0 (+ |ULTIMATE.start_upsweep_#res#1| 2147483648)) (<= 0 (+ |ULTIMATE.start_downsweep_~right~1#1| 1)) (<= 0 (+ |ULTIMATE.start_upsweep_~n#1| 2147483648)) (<= 0 |ULTIMATE.start_downsweep_#in~a#1.offset|) (<= |ULTIMATE.start_downsweep_~right~1#1| 2147483647) (<= 0 (+ |ULTIMATE.start_downsweep_#in~space#1| 2147483648)) (<= |ULTIMATE.start_downsweep_#in~space#1| 2147483647) (<= |ULTIMATE.start_upsweep_~a#1.offset| 0) (<= |ULTIMATE.start_is_pow2_#res#1| 1) (<= 0 (+ 2147483648 |ULTIMATE.start_main_~space~1#1|)) (<= |ULTIMATE.start_downsweep_~a#1.offset| 0) (<= 0 (+ |ULTIMATE.start_upsweep_#in~n#1| 2147483648)) (<= |ULTIMATE.start_upsweep_#in~n#1| 2147483647) (<= 0 (+ |ULTIMATE.start_upsweep_~space~0#1| 2147483648)) (<= |ULTIMATE.start_upsweep_~n#1| 2147483647) (<= |ULTIMATE.start_upsweep_~space~0#1| 2147483647) (<= |ULTIMATE.start_downsweep_#in~n#1| 2147483647) (<= 0 |ULTIMATE.start_main_~a0~0#1.offset|) (= |#NULL.offset| 0) (<= |ULTIMATE.start_is_pow2_#in~x#1| 2147483647) (<= |ULTIMATE.start_downsweep_#in~a#1.offset| 0) (= |ULTIMATE.start_main_#t~malloc15#1.offset| 0) (<= |ULTIMATE.start_main_~space~1#1| 2147483647) (<= |ULTIMATE.start_main_~a0~0#1.offset| 0) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~a~0#1.offset| 0) (<= 0 |ULTIMATE.start_downsweep_~space#1|) (= |#NULL.base| 0))' at error location [2022-12-14 07:10:08,075 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 07:10:08,075 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 07:10:08,075 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 17 [2022-12-14 07:10:08,075 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1789439007] [2022-12-14 07:10:08,076 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 07:10:08,076 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-12-14 07:10:08,076 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 07:10:08,076 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-12-14 07:10:08,076 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=213, Invalid=1857, Unknown=0, NotChecked=0, Total=2070 [2022-12-14 07:10:08,076 INFO L87 Difference]: Start difference. First operand 164 states and 191 transitions. Second operand has 17 states, 17 states have (on average 3.9411764705882355) internal successors, (67), 17 states have internal predecessors, (67), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-12-14 07:10:08,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:10:08,477 INFO L93 Difference]: Finished difference Result 186 states and 210 transitions. [2022-12-14 07:10:08,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-12-14 07:10:08,477 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.9411764705882355) internal successors, (67), 17 states have internal predecessors, (67), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 53 [2022-12-14 07:10:08,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:10:08,478 INFO L225 Difference]: With dead ends: 186 [2022-12-14 07:10:08,478 INFO L226 Difference]: Without dead ends: 186 [2022-12-14 07:10:08,478 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 946 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=318, Invalid=2762, Unknown=0, NotChecked=0, Total=3080 [2022-12-14 07:10:08,478 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 155 mSDsluCounter, 262 mSDsCounter, 0 mSdLazyCounter, 296 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 155 SdHoareTripleChecker+Valid, 295 SdHoareTripleChecker+Invalid, 303 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 296 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 07:10:08,479 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [155 Valid, 295 Invalid, 303 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 296 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 07:10:08,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2022-12-14 07:10:08,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 164. [2022-12-14 07:10:08,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 164 states, 150 states have (on average 1.2) internal successors, (180), 157 states have internal predecessors, (180), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-12-14 07:10:08,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 188 transitions. [2022-12-14 07:10:08,480 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 188 transitions. Word has length 53 [2022-12-14 07:10:08,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:10:08,481 INFO L495 AbstractCegarLoop]: Abstraction has 164 states and 188 transitions. [2022-12-14 07:10:08,481 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.9411764705882355) internal successors, (67), 17 states have internal predecessors, (67), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-12-14 07:10:08,481 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 188 transitions. [2022-12-14 07:10:08,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-12-14 07:10:08,484 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:10:08,484 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 07:10:08,488 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68d1f820-b3bd-44ff-981c-6d5644e6ec24/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Ended with exit code 0 [2022-12-14 07:10:08,684 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68d1f820-b3bd-44ff-981c-6d5644e6ec24/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2022-12-14 07:10:08,685 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr23REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2022-12-14 07:10:08,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:10:08,685 INFO L85 PathProgramCache]: Analyzing trace with hash 1197704573, now seen corresponding path program 1 times [2022-12-14 07:10:08,685 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 07:10:08,685 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [985295548] [2022-12-14 07:10:08,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:10:08,685 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 07:10:08,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:10:08,816 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 3 proven. 12 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-12-14 07:10:08,816 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 07:10:08,816 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [985295548] [2022-12-14 07:10:08,816 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [985295548] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 07:10:08,816 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1921647359] [2022-12-14 07:10:08,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:10:08,816 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 07:10:08,816 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68d1f820-b3bd-44ff-981c-6d5644e6ec24/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 07:10:08,817 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68d1f820-b3bd-44ff-981c-6d5644e6ec24/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 07:10:08,818 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68d1f820-b3bd-44ff-981c-6d5644e6ec24/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2022-12-14 07:10:08,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:10:08,915 INFO L263 TraceCheckSpWp]: Trace formula consists of 351 conjuncts, 10 conjunts are in the unsatisfiable core [2022-12-14 07:10:08,916 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 07:10:08,992 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 9 proven. 5 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-12-14 07:10:08,992 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 07:10:09,060 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 9 proven. 5 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-12-14 07:10:09,060 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1921647359] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 07:10:09,060 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1831984385] [2022-12-14 07:10:09,062 INFO L159 IcfgInterpreter]: Started Sifa with 36 locations of interest [2022-12-14 07:10:09,062 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 07:10:09,062 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 07:10:09,062 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 07:10:09,062 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 07:10:09,277 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 10 treesize of output 9 [2022-12-14 07:10:09,283 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-12-14 07:10:09,306 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 6 [2022-12-14 07:10:09,368 INFO L321 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2022-12-14 07:10:09,369 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 127 treesize of output 127 [2022-12-14 07:10:09,391 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-12-14 07:10:09,391 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 128 treesize of output 130 [2022-12-14 07:10:09,455 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 6 treesize of output 4 [2022-12-14 07:10:09,462 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-12-14 07:10:09,518 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 6 treesize of output 4 [2022-12-14 07:10:09,525 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-12-14 07:10:09,560 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 30 [2022-12-14 07:10:09,640 INFO L321 Elim1Store]: treesize reduction 84, result has 9.7 percent of original size [2022-12-14 07:10:09,641 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 266 treesize of output 263 [2022-12-14 07:10:09,693 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:10:09,702 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 07:10:09,702 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 25 treesize of output 25 [2022-12-14 07:10:09,726 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:10:09,734 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 07:10:09,735 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 25 treesize of output 25 [2022-12-14 07:10:09,950 INFO L321 Elim1Store]: treesize reduction 76, result has 31.5 percent of original size [2022-12-14 07:10:09,950 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 282 treesize of output 303 [2022-12-14 07:10:10,075 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-12-14 07:10:10,099 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:10:10,100 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:10:10,123 INFO L321 Elim1Store]: treesize reduction 28, result has 60.6 percent of original size [2022-12-14 07:10:10,123 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 2 case distinctions, treesize of input 49 treesize of output 82 [2022-12-14 07:10:10,158 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-12-14 07:10:10,186 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:10:10,188 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:10:10,190 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:10:10,219 INFO L321 Elim1Store]: treesize reduction 28, result has 60.6 percent of original size [2022-12-14 07:10:10,220 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 47 treesize of output 70 [2022-12-14 07:10:10,327 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:10:10,327 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 0 case distinctions, treesize of input 36 treesize of output 28 [2022-12-14 07:10:10,380 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:10:10,381 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 0 case distinctions, treesize of input 36 treesize of output 28 [2022-12-14 07:10:10,446 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 07:10:10,538 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:10:10,539 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:10:10,568 INFO L321 Elim1Store]: treesize reduction 25, result has 59.7 percent of original size [2022-12-14 07:10:10,568 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 2 case distinctions, treesize of input 57 treesize of output 67 [2022-12-14 07:10:10,608 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:10:10,609 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:10:10,615 INFO L321 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2022-12-14 07:10:10,616 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 1 case distinctions, treesize of input 101 treesize of output 76 [2022-12-14 07:10:10,736 INFO L321 Elim1Store]: treesize reduction 22, result has 59.3 percent of original size [2022-12-14 07:10:10,737 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 33 treesize of output 45 [2022-12-14 07:10:10,794 INFO L321 Elim1Store]: treesize reduction 27, result has 61.4 percent of original size [2022-12-14 07:10:10,794 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 69 treesize of output 77 [2022-12-14 07:10:10,889 INFO L321 Elim1Store]: treesize reduction 22, result has 59.3 percent of original size [2022-12-14 07:10:10,889 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 33 treesize of output 45 [2022-12-14 07:10:10,950 INFO L321 Elim1Store]: treesize reduction 27, result has 61.4 percent of original size [2022-12-14 07:10:10,950 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 69 treesize of output 77 [2022-12-14 07:10:11,057 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:10:11,057 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 0 case distinctions, treesize of input 45 treesize of output 28 [2022-12-14 07:10:11,086 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:10:11,086 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 29 [2022-12-14 07:10:11,206 INFO L321 Elim1Store]: treesize reduction 43, result has 20.4 percent of original size [2022-12-14 07:10:11,206 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 158 treesize of output 133 [2022-12-14 07:10:11,265 INFO L321 Elim1Store]: treesize reduction 56, result has 20.0 percent of original size [2022-12-14 07:10:11,266 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 178 treesize of output 150 [2022-12-14 07:10:11,414 INFO L321 Elim1Store]: treesize reduction 22, result has 59.3 percent of original size [2022-12-14 07:10:11,414 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 33 treesize of output 45 [2022-12-14 07:10:11,474 INFO L321 Elim1Store]: treesize reduction 27, result has 61.4 percent of original size [2022-12-14 07:10:11,474 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 69 treesize of output 77 [2022-12-14 07:10:11,564 INFO L321 Elim1Store]: treesize reduction 22, result has 59.3 percent of original size [2022-12-14 07:10:11,564 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 33 treesize of output 45 [2022-12-14 07:10:11,627 INFO L321 Elim1Store]: treesize reduction 27, result has 61.4 percent of original size [2022-12-14 07:10:11,628 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 69 treesize of output 77 [2022-12-14 07:10:11,887 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:10:11,888 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 0 case distinctions, treesize of input 45 treesize of output 28 [2022-12-14 07:10:11,919 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:10:11,920 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 0 case distinctions, treesize of input 38 treesize of output 29 [2022-12-14 07:10:12,028 INFO L321 Elim1Store]: treesize reduction 43, result has 20.4 percent of original size [2022-12-14 07:10:12,029 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 158 treesize of output 133 [2022-12-14 07:10:12,089 INFO L321 Elim1Store]: treesize reduction 56, result has 20.0 percent of original size [2022-12-14 07:10:12,089 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 178 treesize of output 150 [2022-12-14 07:10:12,242 INFO L321 Elim1Store]: treesize reduction 22, result has 59.3 percent of original size [2022-12-14 07:10:12,243 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 33 treesize of output 45 [2022-12-14 07:10:12,297 INFO L321 Elim1Store]: treesize reduction 27, result has 61.4 percent of original size [2022-12-14 07:10:12,297 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 69 treesize of output 77 [2022-12-14 07:10:12,401 INFO L321 Elim1Store]: treesize reduction 22, result has 59.3 percent of original size [2022-12-14 07:10:12,402 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 33 treesize of output 45 [2022-12-14 07:10:12,464 INFO L321 Elim1Store]: treesize reduction 27, result has 61.4 percent of original size [2022-12-14 07:10:12,465 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 69 treesize of output 77 [2022-12-14 07:10:12,976 INFO L197 IcfgInterpreter]: Interpreting procedure #Ultimate.meminit with input of size 70 for LOIs [2022-12-14 07:10:12,996 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 8 for LOIs [2022-12-14 07:10:12,997 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 07:10:22,202 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '23845#(and (<= 0 |ULTIMATE.start_upsweep_#in~a#1.offset|) (<= |ULTIMATE.start_main_~n~0#1| 2147483647) (<= |ULTIMATE.start_check_~n#1| 2147483647) (<= 0 |ULTIMATE.start_upsweep_~a#1.offset|) (<= 0 (+ |ULTIMATE.start_downsweep_~n#1| 2147483648)) (<= 0 (+ |ULTIMATE.start_downsweep_#in~n#1| 2147483648)) (<= |ULTIMATE.start_downsweep_~space#1| 0) (<= 0 |ULTIMATE.start_main_~a~0#1.offset|) (<= 0 |ULTIMATE.start_is_pow2_#res#1|) (<= 0 |ULTIMATE.start_main_~i~1#1|) (<= |ULTIMATE.start_upsweep_#in~a#1.offset| 0) (<= |ULTIMATE.start_downsweep_~n#1| 2147483647) (<= 0 |ULTIMATE.start_downsweep_~a#1.offset|) (= |ULTIMATE.start_main_#t~malloc16#1.offset| 0) (<= |ULTIMATE.start_upsweep_#res#1| 2147483647) (<= 0 (+ |ULTIMATE.start_is_pow2_#in~x#1| 2147483648)) (<= 0 |ULTIMATE.start_check_~n#1|) (<= 0 (+ |ULTIMATE.start_upsweep_#res#1| 2147483648)) (<= |ULTIMATE.start_check_#in~a0#1.offset| 0) (<= 0 |ULTIMATE.start_check_~i~0#1|) (<= 0 (+ |ULTIMATE.start_upsweep_~n#1| 2147483648)) (<= |ULTIMATE.start_check_~a0#1.offset| 0) (<= 0 |ULTIMATE.start_downsweep_#in~a#1.offset|) (not (<= (+ |ULTIMATE.start_check_~a#1.offset| (* |ULTIMATE.start_check_~i~0#1| 4) 4) (select |#length| |ULTIMATE.start_check_~a#1.base|))) (<= 0 (+ |ULTIMATE.start_downsweep_#in~space#1| 2147483648)) (<= |ULTIMATE.start_downsweep_#in~space#1| 2147483647) (<= |ULTIMATE.start_check_#in~a#1.offset| 0) (<= |ULTIMATE.start_upsweep_~a#1.offset| 0) (<= |ULTIMATE.start_is_pow2_#res#1| 1) (<= 0 (+ 2147483648 |ULTIMATE.start_main_~space~1#1|)) (<= |ULTIMATE.start_downsweep_~a#1.offset| 0) (<= 0 (+ |ULTIMATE.start_upsweep_#in~n#1| 2147483648)) (<= |ULTIMATE.start_upsweep_#in~n#1| 2147483647) (<= 0 (+ |ULTIMATE.start_upsweep_~space~0#1| 2147483648)) (<= |ULTIMATE.start_upsweep_~n#1| 2147483647) (<= |ULTIMATE.start_check_~a#1.offset| 0) (<= |ULTIMATE.start_upsweep_~space~0#1| 2147483647) (<= |ULTIMATE.start_downsweep_#in~n#1| 2147483647) (<= 0 |ULTIMATE.start_main_~a0~0#1.offset|) (= |#NULL.offset| 0) (<= |ULTIMATE.start_is_pow2_#in~x#1| 2147483647) (<= |ULTIMATE.start_downsweep_#in~a#1.offset| 0) (<= |ULTIMATE.start_check_#in~n#1| 2147483647) (= |ULTIMATE.start_main_#t~malloc15#1.offset| 0) (<= 0 |ULTIMATE.start_check_~a0#1.offset|) (<= |ULTIMATE.start_main_~space~1#1| 2147483647) (<= 0 |ULTIMATE.start_check_~a#1.offset|) (<= |ULTIMATE.start_main_~a0~0#1.offset| 0) (<= 0 |ULTIMATE.start_check_#in~n#1|) (<= 0 |ULTIMATE.start_main_~n~0#1|) (<= 0 |ULTIMATE.start_check_#in~a0#1.offset|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~a~0#1.offset| 0) (<= 0 |ULTIMATE.start_check_#in~a#1.offset|) (= |#NULL.base| 0))' at error location [2022-12-14 07:10:22,202 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 07:10:22,202 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 07:10:22,202 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 15 [2022-12-14 07:10:22,202 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [848353847] [2022-12-14 07:10:22,202 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 07:10:22,203 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-12-14 07:10:22,203 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 07:10:22,203 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-12-14 07:10:22,203 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=243, Invalid=2207, Unknown=0, NotChecked=0, Total=2450 [2022-12-14 07:10:22,203 INFO L87 Difference]: Start difference. First operand 164 states and 188 transitions. Second operand has 15 states, 15 states have (on average 4.6) internal successors, (69), 15 states have internal predecessors, (69), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-12-14 07:10:22,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:10:22,347 INFO L93 Difference]: Finished difference Result 170 states and 193 transitions. [2022-12-14 07:10:22,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-12-14 07:10:22,348 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.6) internal successors, (69), 15 states have internal predecessors, (69), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 55 [2022-12-14 07:10:22,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:10:22,348 INFO L225 Difference]: With dead ends: 170 [2022-12-14 07:10:22,348 INFO L226 Difference]: Without dead ends: 170 [2022-12-14 07:10:22,348 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 120 SyntacticMatches, 6 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 832 ImplicationChecksByTransitivity, 9.3s TimeCoverageRelationStatistics Valid=276, Invalid=2586, Unknown=0, NotChecked=0, Total=2862 [2022-12-14 07:10:22,349 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 63 mSDsluCounter, 235 mSDsCounter, 0 mSdLazyCounter, 242 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 269 SdHoareTripleChecker+Invalid, 244 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 242 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 07:10:22,349 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [63 Valid, 269 Invalid, 244 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 242 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 07:10:22,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2022-12-14 07:10:22,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 167. [2022-12-14 07:10:22,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 167 states, 153 states have (on average 1.196078431372549) internal successors, (183), 160 states have internal predecessors, (183), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-12-14 07:10:22,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 191 transitions. [2022-12-14 07:10:22,351 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 191 transitions. Word has length 55 [2022-12-14 07:10:22,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:10:22,351 INFO L495 AbstractCegarLoop]: Abstraction has 167 states and 191 transitions. [2022-12-14 07:10:22,351 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 4.6) internal successors, (69), 15 states have internal predecessors, (69), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-12-14 07:10:22,351 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 191 transitions. [2022-12-14 07:10:22,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-12-14 07:10:22,351 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:10:22,351 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 4, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 07:10:22,356 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68d1f820-b3bd-44ff-981c-6d5644e6ec24/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Ended with exit code 0 [2022-12-14 07:10:22,552 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49,36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68d1f820-b3bd-44ff-981c-6d5644e6ec24/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 07:10:22,553 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2022-12-14 07:10:22,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:10:22,554 INFO L85 PathProgramCache]: Analyzing trace with hash -1946026865, now seen corresponding path program 5 times [2022-12-14 07:10:22,554 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 07:10:22,554 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1327686128] [2022-12-14 07:10:22,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:10:22,555 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 07:10:22,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:10:22,689 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 6 proven. 20 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2022-12-14 07:10:22,689 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 07:10:22,690 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1327686128] [2022-12-14 07:10:22,690 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1327686128] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 07:10:22,690 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [425650914] [2022-12-14 07:10:22,690 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 07:10:22,690 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 07:10:22,690 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68d1f820-b3bd-44ff-981c-6d5644e6ec24/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 07:10:22,691 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68d1f820-b3bd-44ff-981c-6d5644e6ec24/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 07:10:22,691 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68d1f820-b3bd-44ff-981c-6d5644e6ec24/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2022-12-14 07:10:22,931 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-12-14 07:10:22,931 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 07:10:22,933 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 32 conjunts are in the unsatisfiable core [2022-12-14 07:10:22,934 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 07:10:23,044 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-12-14 07:10:23,528 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 17 treesize of output 13 [2022-12-14 07:10:23,735 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 19 proven. 11 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2022-12-14 07:10:23,736 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 07:10:24,203 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 7 proven. 21 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2022-12-14 07:10:24,203 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [425650914] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 07:10:24,203 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2054200958] [2022-12-14 07:10:24,204 INFO L159 IcfgInterpreter]: Started Sifa with 23 locations of interest [2022-12-14 07:10:24,204 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 07:10:24,204 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 07:10:24,205 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 07:10:24,205 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 07:10:24,458 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-12-14 07:10:24,470 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 10 treesize of output 9 [2022-12-14 07:10:24,506 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 6 [2022-12-14 07:10:24,601 INFO L321 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2022-12-14 07:10:24,602 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 127 treesize of output 127 [2022-12-14 07:10:24,624 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-12-14 07:10:24,624 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 128 treesize of output 130 [2022-12-14 07:10:24,725 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 6 treesize of output 4 [2022-12-14 07:10:24,735 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-12-14 07:10:24,809 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 6 treesize of output 4 [2022-12-14 07:10:24,818 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-12-14 07:10:24,938 INFO L321 Elim1Store]: treesize reduction 28, result has 15.2 percent of original size [2022-12-14 07:10:24,938 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 200 treesize of output 196 [2022-12-14 07:10:25,002 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:10:25,017 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 07:10:25,017 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 25 treesize of output 25 [2022-12-14 07:10:25,037 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:10:25,049 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 07:10:25,049 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 25 treesize of output 25 [2022-12-14 07:10:25,133 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:10:25,133 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 0 case distinctions, treesize of input 34 treesize of output 26 [2022-12-14 07:10:25,193 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:10:25,193 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 0 case distinctions, treesize of input 36 treesize of output 28 [2022-12-14 07:10:25,267 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:10:25,267 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 0 case distinctions, treesize of input 36 treesize of output 28 [2022-12-14 07:10:25,401 INFO L197 IcfgInterpreter]: Interpreting procedure #Ultimate.meminit with input of size 70 for LOIs [2022-12-14 07:10:25,423 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 8 for LOIs [2022-12-14 07:10:25,424 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 07:10:31,572 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '24588#(and (<= 0 |ULTIMATE.start_upsweep_#in~a#1.offset|) (<= |ULTIMATE.start_main_~n~0#1| 2147483647) (<= 0 |ULTIMATE.start_upsweep_~a#1.offset|) (<= 1 |ULTIMATE.start_upsweep_#in~n#1|) (<= 0 |ULTIMATE.start_main_~a~0#1.offset|) (<= 0 |ULTIMATE.start_is_pow2_#res#1|) (<= |ULTIMATE.start_upsweep_#in~a#1.offset| 0) (= |ULTIMATE.start_main_#t~malloc16#1.offset| 0) (<= 0 (+ |ULTIMATE.start_is_pow2_#in~x#1| 2147483648)) (= (select (select |#memory_int| |ULTIMATE.start_upsweep_~a#1.base|) (+ (* 4 |ULTIMATE.start_upsweep_~left~0#1|) |ULTIMATE.start_upsweep_~a#1.offset|)) |ULTIMATE.start_upsweep_#t~mem5#1|) (= |ULTIMATE.start_upsweep_~right~0#1| (+ |ULTIMATE.start_upsweep_~space~0#1| |ULTIMATE.start_upsweep_~left~0#1|)) (<= (+ (* 4 |ULTIMATE.start_upsweep_~left~0#1|) |ULTIMATE.start_upsweep_~a#1.offset| 4) (select |#length| |ULTIMATE.start_upsweep_~a#1.base|)) (<= |ULTIMATE.start_upsweep_~a#1.offset| 0) (<= |ULTIMATE.start_is_pow2_#res#1| 1) (<= |ULTIMATE.start_upsweep_#in~n#1| 2147483647) (<= 0 (+ (* 4 |ULTIMATE.start_upsweep_~left~0#1|) |ULTIMATE.start_upsweep_~a#1.offset|)) (<= 1 |ULTIMATE.start_main_~n~0#1|) (<= 1 |ULTIMATE.start_main_~i~1#1|) (<= |ULTIMATE.start_upsweep_~n#1| 2147483647) (= (select |#valid| |ULTIMATE.start_upsweep_~a#1.base|) 1) (< |ULTIMATE.start_upsweep_~left~0#1| |ULTIMATE.start_upsweep_~n#1|) (<= 0 |ULTIMATE.start_main_~a0~0#1.offset|) (= |#NULL.offset| 0) (<= |ULTIMATE.start_is_pow2_#in~x#1| 2147483647) (= |ULTIMATE.start_main_#t~malloc15#1.offset| 0) (<= |ULTIMATE.start_main_~a0~0#1.offset| 0) (not (<= (+ (* |ULTIMATE.start_upsweep_~right~0#1| 4) |ULTIMATE.start_upsweep_~a#1.offset| 4) (select |#length| |ULTIMATE.start_upsweep_~a#1.base|))) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~a~0#1.offset| 0) (= |#NULL.base| 0))' at error location [2022-12-14 07:10:31,573 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 07:10:31,573 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 07:10:31,573 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 15, 14] total 33 [2022-12-14 07:10:31,573 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [705530965] [2022-12-14 07:10:31,573 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 07:10:31,573 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-12-14 07:10:31,573 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 07:10:31,573 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-12-14 07:10:31,574 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=239, Invalid=2729, Unknown=2, NotChecked=0, Total=2970 [2022-12-14 07:10:31,574 INFO L87 Difference]: Start difference. First operand 167 states and 191 transitions. Second operand has 33 states, 30 states have (on average 2.6333333333333333) internal successors, (79), 33 states have internal predecessors, (79), 7 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (10), 5 states have call predecessors, (10), 7 states have call successors, (10) [2022-12-14 07:10:34,179 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 07:10:35,418 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.12s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 07:10:36,538 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.09s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 07:10:39,111 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 07:10:41,167 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 07:10:43,576 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 07:10:45,584 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 07:10:47,831 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 07:10:49,840 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 07:10:51,909 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 07:10:53,919 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 07:10:56,141 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 07:10:58,160 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 07:10:59,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:10:59,607 INFO L93 Difference]: Finished difference Result 613 states and 687 transitions. [2022-12-14 07:10:59,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-12-14 07:10:59,608 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 30 states have (on average 2.6333333333333333) internal successors, (79), 33 states have internal predecessors, (79), 7 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (10), 5 states have call predecessors, (10), 7 states have call successors, (10) Word has length 56 [2022-12-14 07:10:59,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:10:59,609 INFO L225 Difference]: With dead ends: 613 [2022-12-14 07:10:59,609 INFO L226 Difference]: Without dead ends: 613 [2022-12-14 07:10:59,610 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 218 GetRequests, 120 SyntacticMatches, 2 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2854 ImplicationChecksByTransitivity, 9.3s TimeCoverageRelationStatistics Valid=1026, Invalid=8478, Unknown=2, NotChecked=0, Total=9506 [2022-12-14 07:10:59,610 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 1458 mSDsluCounter, 538 mSDsCounter, 0 mSdLazyCounter, 1655 mSolverCounterSat, 57 mSolverCounterUnsat, 14 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 25.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1460 SdHoareTripleChecker+Valid, 579 SdHoareTripleChecker+Invalid, 1726 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 1655 IncrementalHoareTripleChecker+Invalid, 14 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 25.7s IncrementalHoareTripleChecker+Time [2022-12-14 07:10:59,610 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1460 Valid, 579 Invalid, 1726 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 1655 Invalid, 14 Unknown, 0 Unchecked, 25.7s Time] [2022-12-14 07:10:59,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 613 states. [2022-12-14 07:10:59,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 613 to 229. [2022-12-14 07:10:59,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 229 states, 208 states have (on average 1.1923076923076923) internal successors, (248), 216 states have internal predecessors, (248), 10 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2022-12-14 07:10:59,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 268 transitions. [2022-12-14 07:10:59,614 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 268 transitions. Word has length 56 [2022-12-14 07:10:59,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:10:59,614 INFO L495 AbstractCegarLoop]: Abstraction has 229 states and 268 transitions. [2022-12-14 07:10:59,614 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 30 states have (on average 2.6333333333333333) internal successors, (79), 33 states have internal predecessors, (79), 7 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (10), 5 states have call predecessors, (10), 7 states have call successors, (10) [2022-12-14 07:10:59,614 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 268 transitions. [2022-12-14 07:10:59,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-12-14 07:10:59,614 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:10:59,614 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 07:10:59,619 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68d1f820-b3bd-44ff-981c-6d5644e6ec24/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Ended with exit code 0 [2022-12-14 07:10:59,815 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68d1f820-b3bd-44ff-981c-6d5644e6ec24/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 07:10:59,816 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr28ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2022-12-14 07:10:59,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:10:59,817 INFO L85 PathProgramCache]: Analyzing trace with hash -1525777526, now seen corresponding path program 1 times [2022-12-14 07:10:59,817 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 07:10:59,817 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [848099369] [2022-12-14 07:10:59,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:10:59,818 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 07:10:59,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:10:59,897 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-12-14 07:10:59,897 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 07:10:59,897 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [848099369] [2022-12-14 07:10:59,897 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [848099369] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 07:10:59,897 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 07:10:59,897 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 07:10:59,897 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [11416330] [2022-12-14 07:10:59,897 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 07:10:59,897 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 07:10:59,897 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 07:10:59,898 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 07:10:59,898 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 07:10:59,898 INFO L87 Difference]: Start difference. First operand 229 states and 268 transitions. Second operand has 4 states, 3 states have (on average 12.666666666666666) internal successors, (38), 4 states have internal predecessors, (38), 3 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2022-12-14 07:10:59,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:10:59,966 INFO L93 Difference]: Finished difference Result 228 states and 267 transitions. [2022-12-14 07:10:59,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 07:10:59,967 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 12.666666666666666) internal successors, (38), 4 states have internal predecessors, (38), 3 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 56 [2022-12-14 07:10:59,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:10:59,968 INFO L225 Difference]: With dead ends: 228 [2022-12-14 07:10:59,968 INFO L226 Difference]: Without dead ends: 198 [2022-12-14 07:10:59,968 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-12-14 07:10:59,969 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 46 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 07:10:59,969 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 45 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 07:10:59,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2022-12-14 07:10:59,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 198. [2022-12-14 07:10:59,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 198 states, 178 states have (on average 1.196629213483146) internal successors, (213), 185 states have internal predecessors, (213), 10 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2022-12-14 07:10:59,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 233 transitions. [2022-12-14 07:10:59,972 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 233 transitions. Word has length 56 [2022-12-14 07:10:59,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:10:59,972 INFO L495 AbstractCegarLoop]: Abstraction has 198 states and 233 transitions. [2022-12-14 07:10:59,972 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 12.666666666666666) internal successors, (38), 4 states have internal predecessors, (38), 3 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2022-12-14 07:10:59,972 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 233 transitions. [2022-12-14 07:10:59,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-12-14 07:10:59,972 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:10:59,972 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 4, 4, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 07:10:59,972 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2022-12-14 07:10:59,972 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2022-12-14 07:10:59,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:10:59,973 INFO L85 PathProgramCache]: Analyzing trace with hash -1679122894, now seen corresponding path program 6 times [2022-12-14 07:10:59,973 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 07:10:59,973 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2027441429] [2022-12-14 07:10:59,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:10:59,973 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 07:10:59,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:11:00,163 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 43 proven. 36 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-12-14 07:11:00,163 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 07:11:00,163 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2027441429] [2022-12-14 07:11:00,163 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2027441429] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 07:11:00,163 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2040448240] [2022-12-14 07:11:00,164 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 07:11:00,164 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 07:11:00,164 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68d1f820-b3bd-44ff-981c-6d5644e6ec24/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 07:11:00,164 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68d1f820-b3bd-44ff-981c-6d5644e6ec24/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 07:11:00,165 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68d1f820-b3bd-44ff-981c-6d5644e6ec24/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2022-12-14 07:11:00,245 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 07:11:00,245 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 07:11:00,246 INFO L263 TraceCheckSpWp]: Trace formula consists of 271 conjuncts, 14 conjunts are in the unsatisfiable core [2022-12-14 07:11:00,247 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 07:11:00,361 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 56 proven. 22 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-12-14 07:11:00,361 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 07:11:00,492 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 56 proven. 22 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-12-14 07:11:00,492 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2040448240] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 07:11:00,492 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [601179134] [2022-12-14 07:11:00,493 INFO L159 IcfgInterpreter]: Started Sifa with 23 locations of interest [2022-12-14 07:11:00,493 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 07:11:00,493 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 07:11:00,493 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 07:11:00,493 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 07:11:00,760 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 10 treesize of output 9 [2022-12-14 07:11:00,772 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-12-14 07:11:00,806 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 7 treesize of output 6 [2022-12-14 07:11:00,872 INFO L321 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2022-12-14 07:11:00,873 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 127 treesize of output 127 [2022-12-14 07:11:00,893 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-12-14 07:11:00,894 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 128 treesize of output 130 [2022-12-14 07:11:00,985 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 6 treesize of output 4 [2022-12-14 07:11:00,993 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-12-14 07:11:01,054 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 6 treesize of output 4 [2022-12-14 07:11:01,062 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-12-14 07:11:01,136 INFO L321 Elim1Store]: treesize reduction 28, result has 15.2 percent of original size [2022-12-14 07:11:01,137 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 200 treesize of output 196 [2022-12-14 07:11:01,192 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:11:01,201 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 07:11:01,201 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 25 treesize of output 25 [2022-12-14 07:11:01,221 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:11:01,230 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 07:11:01,230 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 25 treesize of output 25 [2022-12-14 07:11:01,297 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:11:01,297 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 0 case distinctions, treesize of input 36 treesize of output 28 [2022-12-14 07:11:01,356 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:11:01,356 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 0 case distinctions, treesize of input 36 treesize of output 28 [2022-12-14 07:11:01,408 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:11:01,408 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 0 case distinctions, treesize of input 36 treesize of output 28 [2022-12-14 07:11:01,522 INFO L197 IcfgInterpreter]: Interpreting procedure #Ultimate.meminit with input of size 70 for LOIs [2022-12-14 07:11:01,539 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 8 for LOIs [2022-12-14 07:11:01,540 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 07:11:04,703 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '26337#(and (<= 0 |ULTIMATE.start_upsweep_#in~a#1.offset|) (<= |ULTIMATE.start_main_~n~0#1| 2147483647) (<= 0 |ULTIMATE.start_upsweep_~a#1.offset|) (<= 1 |ULTIMATE.start_upsweep_#in~n#1|) (<= 0 |ULTIMATE.start_main_~a~0#1.offset|) (<= 0 |ULTIMATE.start_is_pow2_#res#1|) (<= |ULTIMATE.start_upsweep_#in~a#1.offset| 0) (= |ULTIMATE.start_main_#t~malloc16#1.offset| 0) (<= 0 (+ |ULTIMATE.start_is_pow2_#in~x#1| 2147483648)) (= (select (select |#memory_int| |ULTIMATE.start_upsweep_~a#1.base|) (+ (* 4 |ULTIMATE.start_upsweep_~left~0#1|) |ULTIMATE.start_upsweep_~a#1.offset|)) |ULTIMATE.start_upsweep_#t~mem5#1|) (= |ULTIMATE.start_upsweep_~right~0#1| (+ |ULTIMATE.start_upsweep_~space~0#1| |ULTIMATE.start_upsweep_~left~0#1|)) (<= (+ (* 4 |ULTIMATE.start_upsweep_~left~0#1|) |ULTIMATE.start_upsweep_~a#1.offset| 4) (select |#length| |ULTIMATE.start_upsweep_~a#1.base|)) (<= |ULTIMATE.start_upsweep_~a#1.offset| 0) (<= |ULTIMATE.start_is_pow2_#res#1| 1) (<= |ULTIMATE.start_upsweep_#in~n#1| 2147483647) (<= 0 (+ (* 4 |ULTIMATE.start_upsweep_~left~0#1|) |ULTIMATE.start_upsweep_~a#1.offset|)) (<= 1 |ULTIMATE.start_main_~n~0#1|) (<= 1 |ULTIMATE.start_main_~i~1#1|) (<= |ULTIMATE.start_upsweep_~n#1| 2147483647) (= (select |#valid| |ULTIMATE.start_upsweep_~a#1.base|) 1) (< |ULTIMATE.start_upsweep_~left~0#1| |ULTIMATE.start_upsweep_~n#1|) (<= 0 |ULTIMATE.start_main_~a0~0#1.offset|) (= |#NULL.offset| 0) (<= |ULTIMATE.start_is_pow2_#in~x#1| 2147483647) (= |ULTIMATE.start_main_#t~malloc15#1.offset| 0) (<= |ULTIMATE.start_main_~a0~0#1.offset| 0) (not (<= (+ (* |ULTIMATE.start_upsweep_~right~0#1| 4) |ULTIMATE.start_upsweep_~a#1.offset| 4) (select |#length| |ULTIMATE.start_upsweep_~a#1.base|))) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~a~0#1.offset| 0) (= |#NULL.base| 0))' at error location [2022-12-14 07:11:04,704 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 07:11:04,704 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 07:11:04,704 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 25 [2022-12-14 07:11:04,704 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1385934544] [2022-12-14 07:11:04,704 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 07:11:04,704 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-12-14 07:11:04,704 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 07:11:04,705 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-12-14 07:11:04,705 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=1926, Unknown=0, NotChecked=0, Total=2162 [2022-12-14 07:11:04,705 INFO L87 Difference]: Start difference. First operand 198 states and 233 transitions. Second operand has 25 states, 25 states have (on average 3.2) internal successors, (80), 25 states have internal predecessors, (80), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-12-14 07:11:05,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:11:05,124 INFO L93 Difference]: Finished difference Result 235 states and 272 transitions. [2022-12-14 07:11:05,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-12-14 07:11:05,125 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 3.2) internal successors, (80), 25 states have internal predecessors, (80), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 58 [2022-12-14 07:11:05,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:11:05,125 INFO L225 Difference]: With dead ends: 235 [2022-12-14 07:11:05,125 INFO L226 Difference]: Without dead ends: 235 [2022-12-14 07:11:05,126 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 137 SyntacticMatches, 5 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 893 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=416, Invalid=2776, Unknown=0, NotChecked=0, Total=3192 [2022-12-14 07:11:05,126 INFO L413 NwaCegarLoop]: 45 mSDtfsCounter, 276 mSDsluCounter, 481 mSDsCounter, 0 mSdLazyCounter, 670 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 276 SdHoareTripleChecker+Valid, 526 SdHoareTripleChecker+Invalid, 673 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 670 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 07:11:05,126 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [276 Valid, 526 Invalid, 673 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 670 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 07:11:05,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235 states. [2022-12-14 07:11:05,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 235 to 198. [2022-12-14 07:11:05,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 198 states, 178 states have (on average 1.1853932584269662) internal successors, (211), 185 states have internal predecessors, (211), 10 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2022-12-14 07:11:05,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 231 transitions. [2022-12-14 07:11:05,128 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 231 transitions. Word has length 58 [2022-12-14 07:11:05,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:11:05,129 INFO L495 AbstractCegarLoop]: Abstraction has 198 states and 231 transitions. [2022-12-14 07:11:05,129 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 3.2) internal successors, (80), 25 states have internal predecessors, (80), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-12-14 07:11:05,129 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 231 transitions. [2022-12-14 07:11:05,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-12-14 07:11:05,129 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:11:05,129 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 07:11:05,134 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68d1f820-b3bd-44ff-981c-6d5644e6ec24/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Ended with exit code 0 [2022-12-14 07:11:05,330 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68d1f820-b3bd-44ff-981c-6d5644e6ec24/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 07:11:05,331 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2022-12-14 07:11:05,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:11:05,332 INFO L85 PathProgramCache]: Analyzing trace with hash -1469484974, now seen corresponding path program 3 times [2022-12-14 07:11:05,332 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 07:11:05,332 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2133581221] [2022-12-14 07:11:05,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:11:05,333 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 07:11:05,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:11:05,603 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 6 proven. 19 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-12-14 07:11:05,603 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 07:11:05,604 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2133581221] [2022-12-14 07:11:05,604 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2133581221] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 07:11:05,604 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [383480588] [2022-12-14 07:11:05,604 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 07:11:05,604 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 07:11:05,604 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68d1f820-b3bd-44ff-981c-6d5644e6ec24/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 07:11:05,605 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68d1f820-b3bd-44ff-981c-6d5644e6ec24/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 07:11:05,605 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68d1f820-b3bd-44ff-981c-6d5644e6ec24/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2022-12-14 07:11:05,704 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 07:11:05,704 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 07:11:05,705 INFO L263 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 6 conjunts are in the unsatisfiable core [2022-12-14 07:11:05,706 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 07:11:05,829 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2022-12-14 07:11:05,829 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 07:11:06,049 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2022-12-14 07:11:06,049 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [383480588] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 07:11:06,049 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1968723446] [2022-12-14 07:11:06,050 INFO L159 IcfgInterpreter]: Started Sifa with 31 locations of interest [2022-12-14 07:11:06,051 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 07:11:06,051 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 07:11:06,051 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 07:11:06,051 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 07:11:06,257 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 10 treesize of output 9 [2022-12-14 07:11:06,262 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-12-14 07:11:06,297 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 6 [2022-12-14 07:11:06,369 INFO L321 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2022-12-14 07:11:06,369 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 127 treesize of output 127 [2022-12-14 07:11:06,394 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-12-14 07:11:06,394 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 128 treesize of output 130 [2022-12-14 07:11:06,479 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 6 treesize of output 4 [2022-12-14 07:11:06,490 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-12-14 07:11:06,585 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 6 treesize of output 4 [2022-12-14 07:11:06,596 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-12-14 07:11:06,638 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 30 [2022-12-14 07:11:06,724 INFO L321 Elim1Store]: treesize reduction 84, result has 9.7 percent of original size [2022-12-14 07:11:06,725 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 272 treesize of output 269 [2022-12-14 07:11:06,784 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:11:06,798 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 07:11:06,798 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 25 treesize of output 25 [2022-12-14 07:11:06,821 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:11:06,832 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 07:11:06,832 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 25 treesize of output 25 [2022-12-14 07:11:07,055 INFO L321 Elim1Store]: treesize reduction 76, result has 31.5 percent of original size [2022-12-14 07:11:07,055 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 285 treesize of output 306 [2022-12-14 07:11:07,314 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:11:07,317 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:11:07,350 INFO L321 Elim1Store]: treesize reduction 28, result has 60.6 percent of original size [2022-12-14 07:11:07,351 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 2 case distinctions, treesize of input 49 treesize of output 82 [2022-12-14 07:11:07,461 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:11:07,464 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:11:07,504 INFO L321 Elim1Store]: treesize reduction 28, result has 60.6 percent of original size [2022-12-14 07:11:07,504 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 2 case distinctions, treesize of input 276 treesize of output 309 [2022-12-14 07:11:07,607 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:11:07,608 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:11:07,611 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:11:07,652 INFO L321 Elim1Store]: treesize reduction 28, result has 60.6 percent of original size [2022-12-14 07:11:07,652 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 274 treesize of output 297 [2022-12-14 07:11:07,711 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:11:07,713 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:11:07,716 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:11:07,763 INFO L321 Elim1Store]: treesize reduction 28, result has 60.6 percent of original size [2022-12-14 07:11:07,763 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 47 treesize of output 70 [2022-12-14 07:11:07,937 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:11:07,938 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 0 case distinctions, treesize of input 36 treesize of output 28 [2022-12-14 07:11:07,997 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:11:07,997 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 28 [2022-12-14 07:11:08,069 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 07:11:08,165 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:11:08,167 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:11:08,198 INFO L321 Elim1Store]: treesize reduction 25, result has 59.7 percent of original size [2022-12-14 07:11:08,198 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 2 case distinctions, treesize of input 57 treesize of output 67 [2022-12-14 07:11:08,248 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:11:08,249 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:11:08,257 INFO L321 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2022-12-14 07:11:08,257 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 1 case distinctions, treesize of input 65 treesize of output 59 [2022-12-14 07:11:08,371 INFO L321 Elim1Store]: treesize reduction 22, result has 59.3 percent of original size [2022-12-14 07:11:08,371 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 33 treesize of output 45 [2022-12-14 07:11:08,427 INFO L321 Elim1Store]: treesize reduction 27, result has 61.4 percent of original size [2022-12-14 07:11:08,427 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 69 treesize of output 77 [2022-12-14 07:11:08,532 INFO L321 Elim1Store]: treesize reduction 22, result has 59.3 percent of original size [2022-12-14 07:11:08,533 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 33 treesize of output 45 [2022-12-14 07:11:08,597 INFO L321 Elim1Store]: treesize reduction 27, result has 61.4 percent of original size [2022-12-14 07:11:08,597 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 69 treesize of output 77 [2022-12-14 07:11:08,776 INFO L197 IcfgInterpreter]: Interpreting procedure #Ultimate.meminit with input of size 70 for LOIs [2022-12-14 07:11:08,796 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 8 for LOIs [2022-12-14 07:11:08,797 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 07:11:14,446 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '27183#(and (<= 0 |ULTIMATE.start_upsweep_#in~a#1.offset|) (<= |ULTIMATE.start_main_~n~0#1| 2147483647) (<= 0 |ULTIMATE.start_upsweep_~a#1.offset|) (<= 0 (+ |ULTIMATE.start_main_~n~0#1| 1)) (<= 0 |ULTIMATE.start_main_~a~0#1.offset|) (<= |ULTIMATE.start_downsweep_~left~1#1| 2147483647) (<= 0 |ULTIMATE.start_is_pow2_#res#1|) (<= 0 |ULTIMATE.start_main_~i~1#1|) (or (not (<= (+ |ULTIMATE.start_downsweep_~a#1.offset| 4 (* |ULTIMATE.start_downsweep_~right~1#1| 4)) (select |#length| |ULTIMATE.start_downsweep_~a#1.base|))) (not (<= 0 (+ |ULTIMATE.start_downsweep_~a#1.offset| (* |ULTIMATE.start_downsweep_~right~1#1| 4))))) (<= |ULTIMATE.start_upsweep_#in~a#1.offset| 0) (<= 0 (+ |ULTIMATE.start_downsweep_~n#1| 1)) (<= |ULTIMATE.start_downsweep_~n#1| 2147483647) (<= 0 (+ |ULTIMATE.start_downsweep_#in~n#1| 1)) (<= 0 |ULTIMATE.start_downsweep_~a#1.offset|) (= |ULTIMATE.start_main_#t~malloc16#1.offset| 0) (<= |ULTIMATE.start_upsweep_#res#1| 2147483647) (<= 0 (+ |ULTIMATE.start_is_pow2_#in~x#1| 2147483648)) (<= 0 (+ |ULTIMATE.start_upsweep_#res#1| 2147483648)) (<= 0 (+ |ULTIMATE.start_downsweep_~right~1#1| 1)) (<= 0 (+ |ULTIMATE.start_upsweep_~n#1| 2147483648)) (<= 0 |ULTIMATE.start_downsweep_#in~a#1.offset|) (<= |ULTIMATE.start_downsweep_~right~1#1| 2147483647) (<= 0 (+ |ULTIMATE.start_downsweep_#in~space#1| 2147483648)) (<= |ULTIMATE.start_downsweep_#in~space#1| 2147483647) (<= |ULTIMATE.start_upsweep_~a#1.offset| 0) (<= |ULTIMATE.start_is_pow2_#res#1| 1) (<= 0 (+ 2147483648 |ULTIMATE.start_main_~space~1#1|)) (<= |ULTIMATE.start_downsweep_~a#1.offset| 0) (<= 0 (+ |ULTIMATE.start_upsweep_#in~n#1| 2147483648)) (<= |ULTIMATE.start_upsweep_#in~n#1| 2147483647) (<= 0 (+ |ULTIMATE.start_upsweep_~space~0#1| 2147483648)) (<= |ULTIMATE.start_upsweep_~n#1| 2147483647) (<= |ULTIMATE.start_upsweep_~space~0#1| 2147483647) (<= |ULTIMATE.start_downsweep_#in~n#1| 2147483647) (<= 0 |ULTIMATE.start_main_~a0~0#1.offset|) (= |#NULL.offset| 0) (<= |ULTIMATE.start_is_pow2_#in~x#1| 2147483647) (<= |ULTIMATE.start_downsweep_#in~a#1.offset| 0) (= |ULTIMATE.start_main_#t~malloc15#1.offset| 0) (<= |ULTIMATE.start_main_~space~1#1| 2147483647) (<= |ULTIMATE.start_main_~a0~0#1.offset| 0) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~a~0#1.offset| 0) (<= 0 |ULTIMATE.start_downsweep_~space#1|) (= |#NULL.base| 0))' at error location [2022-12-14 07:11:14,446 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 07:11:14,446 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 07:11:14,446 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 6, 6] total 23 [2022-12-14 07:11:14,446 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1929556965] [2022-12-14 07:11:14,446 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 07:11:14,447 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-12-14 07:11:14,447 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 07:11:14,447 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-12-14 07:11:14,447 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=222, Invalid=2430, Unknown=0, NotChecked=0, Total=2652 [2022-12-14 07:11:14,447 INFO L87 Difference]: Start difference. First operand 198 states and 231 transitions. Second operand has 23 states, 23 states have (on average 3.1739130434782608) internal successors, (73), 23 states have internal predecessors, (73), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-12-14 07:11:15,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:11:15,322 INFO L93 Difference]: Finished difference Result 224 states and 261 transitions. [2022-12-14 07:11:15,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-12-14 07:11:15,322 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 3.1739130434782608) internal successors, (73), 23 states have internal predecessors, (73), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 59 [2022-12-14 07:11:15,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:11:15,323 INFO L225 Difference]: With dead ends: 224 [2022-12-14 07:11:15,323 INFO L226 Difference]: Without dead ends: 224 [2022-12-14 07:11:15,323 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 204 GetRequests, 140 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 976 ImplicationChecksByTransitivity, 6.4s TimeCoverageRelationStatistics Valid=453, Invalid=3837, Unknown=0, NotChecked=0, Total=4290 [2022-12-14 07:11:15,323 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 292 mSDsluCounter, 217 mSDsCounter, 0 mSdLazyCounter, 628 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 292 SdHoareTripleChecker+Valid, 237 SdHoareTripleChecker+Invalid, 645 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 628 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-12-14 07:11:15,324 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [292 Valid, 237 Invalid, 645 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 628 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-12-14 07:11:15,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2022-12-14 07:11:15,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 199. [2022-12-14 07:11:15,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 199 states, 182 states have (on average 1.1703296703296704) internal successors, (213), 186 states have internal predecessors, (213), 10 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2022-12-14 07:11:15,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 233 transitions. [2022-12-14 07:11:15,328 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 233 transitions. Word has length 59 [2022-12-14 07:11:15,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:11:15,328 INFO L495 AbstractCegarLoop]: Abstraction has 199 states and 233 transitions. [2022-12-14 07:11:15,328 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 3.1739130434782608) internal successors, (73), 23 states have internal predecessors, (73), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-12-14 07:11:15,328 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 233 transitions. [2022-12-14 07:11:15,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-12-14 07:11:15,329 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:11:15,329 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 5, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 07:11:15,333 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68d1f820-b3bd-44ff-981c-6d5644e6ec24/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Ended with exit code 0 [2022-12-14 07:11:15,530 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68d1f820-b3bd-44ff-981c-6d5644e6ec24/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 07:11:15,530 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2022-12-14 07:11:15,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:11:15,531 INFO L85 PathProgramCache]: Analyzing trace with hash 164304353, now seen corresponding path program 7 times [2022-12-14 07:11:15,532 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 07:11:15,532 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1253875182] [2022-12-14 07:11:15,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:11:15,532 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 07:11:15,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:11:15,857 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2022-12-14 07:11:15,858 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 07:11:15,858 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1253875182] [2022-12-14 07:11:15,858 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1253875182] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 07:11:15,858 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1277077867] [2022-12-14 07:11:15,858 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-14 07:11:15,858 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 07:11:15,858 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68d1f820-b3bd-44ff-981c-6d5644e6ec24/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 07:11:15,859 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68d1f820-b3bd-44ff-981c-6d5644e6ec24/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 07:11:15,860 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68d1f820-b3bd-44ff-981c-6d5644e6ec24/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2022-12-14 07:11:15,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:11:15,997 INFO L263 TraceCheckSpWp]: Trace formula consists of 370 conjuncts, 24 conjunts are in the unsatisfiable core [2022-12-14 07:11:15,998 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 07:11:16,692 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2022-12-14 07:11:16,692 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 07:11:17,146 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 4 proven. 52 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2022-12-14 07:11:17,146 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1277077867] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 07:11:17,146 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1841936261] [2022-12-14 07:11:17,147 INFO L159 IcfgInterpreter]: Started Sifa with 23 locations of interest [2022-12-14 07:11:17,147 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 07:11:17,147 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 07:11:17,147 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 07:11:17,147 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 07:11:17,469 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 10 treesize of output 9 [2022-12-14 07:11:17,474 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-12-14 07:11:17,497 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 6 [2022-12-14 07:11:17,556 INFO L321 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2022-12-14 07:11:17,556 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 127 treesize of output 127 [2022-12-14 07:11:17,579 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-12-14 07:11:17,579 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 128 treesize of output 130 [2022-12-14 07:11:17,636 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 6 treesize of output 4 [2022-12-14 07:11:17,644 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-12-14 07:11:17,713 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 6 treesize of output 4 [2022-12-14 07:11:17,721 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-12-14 07:11:17,792 INFO L321 Elim1Store]: treesize reduction 38, result has 11.6 percent of original size [2022-12-14 07:11:17,793 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 210 treesize of output 206 [2022-12-14 07:11:17,844 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:11:17,854 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 07:11:17,854 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 25 treesize of output 25 [2022-12-14 07:11:17,875 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:11:17,885 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 07:11:17,886 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 25 treesize of output 25 [2022-12-14 07:11:17,905 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:11:17,915 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 07:11:17,915 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 25 treesize of output 25 [2022-12-14 07:11:17,972 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:11:17,972 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 0 case distinctions, treesize of input 34 treesize of output 26 [2022-12-14 07:11:18,021 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:11:18,021 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 0 case distinctions, treesize of input 36 treesize of output 28 [2022-12-14 07:11:18,069 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:11:18,070 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 0 case distinctions, treesize of input 36 treesize of output 28 [2022-12-14 07:11:18,190 INFO L197 IcfgInterpreter]: Interpreting procedure #Ultimate.meminit with input of size 70 for LOIs [2022-12-14 07:11:18,207 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 8 for LOIs [2022-12-14 07:11:18,208 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 07:11:21,946 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '28063#(and (<= 0 |ULTIMATE.start_upsweep_#in~a#1.offset|) (<= |ULTIMATE.start_main_~n~0#1| 2147483647) (<= 0 |ULTIMATE.start_upsweep_~a#1.offset|) (<= 1 |ULTIMATE.start_upsweep_#in~n#1|) (<= 0 |ULTIMATE.start_main_~a~0#1.offset|) (<= 0 |ULTIMATE.start_is_pow2_#res#1|) (<= |ULTIMATE.start_upsweep_#in~a#1.offset| 0) (= |ULTIMATE.start_main_#t~malloc16#1.offset| 0) (<= 0 (+ |ULTIMATE.start_is_pow2_#in~x#1| 2147483648)) (= (select (select |#memory_int| |ULTIMATE.start_upsweep_~a#1.base|) (+ (* 4 |ULTIMATE.start_upsweep_~left~0#1|) |ULTIMATE.start_upsweep_~a#1.offset|)) |ULTIMATE.start_upsweep_#t~mem5#1|) (= |ULTIMATE.start_upsweep_~right~0#1| (+ |ULTIMATE.start_upsweep_~space~0#1| |ULTIMATE.start_upsweep_~left~0#1|)) (<= (+ (* 4 |ULTIMATE.start_upsweep_~left~0#1|) |ULTIMATE.start_upsweep_~a#1.offset| 4) (select |#length| |ULTIMATE.start_upsweep_~a#1.base|)) (<= |ULTIMATE.start_upsweep_~a#1.offset| 0) (<= |ULTIMATE.start_is_pow2_#res#1| 1) (<= |ULTIMATE.start_upsweep_#in~n#1| 2147483647) (<= 0 (+ (* 4 |ULTIMATE.start_upsweep_~left~0#1|) |ULTIMATE.start_upsweep_~a#1.offset|)) (<= 1 |ULTIMATE.start_main_~n~0#1|) (<= 1 |ULTIMATE.start_main_~i~1#1|) (<= |ULTIMATE.start_upsweep_~n#1| 2147483647) (= (select |#valid| |ULTIMATE.start_upsweep_~a#1.base|) 1) (< |ULTIMATE.start_upsweep_~left~0#1| |ULTIMATE.start_upsweep_~n#1|) (<= 0 |ULTIMATE.start_main_~a0~0#1.offset|) (= |#NULL.offset| 0) (<= |ULTIMATE.start_is_pow2_#in~x#1| 2147483647) (= |ULTIMATE.start_main_#t~malloc15#1.offset| 0) (<= |ULTIMATE.start_main_~a0~0#1.offset| 0) (not (<= (+ (* |ULTIMATE.start_upsweep_~right~0#1| 4) |ULTIMATE.start_upsweep_~a#1.offset| 4) (select |#length| |ULTIMATE.start_upsweep_~a#1.base|))) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~a~0#1.offset| 0) (= |#NULL.base| 0))' at error location [2022-12-14 07:11:21,946 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 07:11:21,946 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 07:11:21,947 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 33 [2022-12-14 07:11:21,947 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1026128655] [2022-12-14 07:11:21,947 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 07:11:21,947 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-12-14 07:11:21,947 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 07:11:21,947 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-12-14 07:11:21,948 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=297, Invalid=2673, Unknown=0, NotChecked=0, Total=2970 [2022-12-14 07:11:21,948 INFO L87 Difference]: Start difference. First operand 199 states and 233 transitions. Second operand has 33 states, 33 states have (on average 2.727272727272727) internal successors, (90), 33 states have internal predecessors, (90), 4 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2022-12-14 07:11:26,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:11:26,186 INFO L93 Difference]: Finished difference Result 423 states and 486 transitions. [2022-12-14 07:11:26,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2022-12-14 07:11:26,187 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.727272727272727) internal successors, (90), 33 states have internal predecessors, (90), 4 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) Word has length 62 [2022-12-14 07:11:26,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:11:26,187 INFO L225 Difference]: With dead ends: 423 [2022-12-14 07:11:26,187 INFO L226 Difference]: Without dead ends: 423 [2022-12-14 07:11:26,188 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 244 GetRequests, 143 SyntacticMatches, 1 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3008 ImplicationChecksByTransitivity, 7.7s TimeCoverageRelationStatistics Valid=1109, Invalid=9193, Unknown=0, NotChecked=0, Total=10302 [2022-12-14 07:11:26,188 INFO L413 NwaCegarLoop]: 55 mSDtfsCounter, 700 mSDsluCounter, 320 mSDsCounter, 0 mSdLazyCounter, 1365 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 700 SdHoareTripleChecker+Valid, 375 SdHoareTripleChecker+Invalid, 1422 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 1365 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-12-14 07:11:26,191 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [700 Valid, 375 Invalid, 1422 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 1365 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-12-14 07:11:26,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 423 states. [2022-12-14 07:11:26,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 423 to 249. [2022-12-14 07:11:26,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 249 states, 232 states have (on average 1.1551724137931034) internal successors, (268), 235 states have internal predecessors, (268), 10 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-12-14 07:11:26,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 249 states to 249 states and 288 transitions. [2022-12-14 07:11:26,194 INFO L78 Accepts]: Start accepts. Automaton has 249 states and 288 transitions. Word has length 62 [2022-12-14 07:11:26,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:11:26,194 INFO L495 AbstractCegarLoop]: Abstraction has 249 states and 288 transitions. [2022-12-14 07:11:26,194 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.727272727272727) internal successors, (90), 33 states have internal predecessors, (90), 4 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2022-12-14 07:11:26,195 INFO L276 IsEmpty]: Start isEmpty. Operand 249 states and 288 transitions. [2022-12-14 07:11:26,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-12-14 07:11:26,195 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:11:26,195 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 5, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 07:11:26,200 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68d1f820-b3bd-44ff-981c-6d5644e6ec24/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Ended with exit code 0 [2022-12-14 07:11:26,396 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54,40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68d1f820-b3bd-44ff-981c-6d5644e6ec24/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 07:11:26,397 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2022-12-14 07:11:26,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:11:26,398 INFO L85 PathProgramCache]: Analyzing trace with hash 399954404, now seen corresponding path program 8 times [2022-12-14 07:11:26,399 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 07:11:26,399 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1772457998] [2022-12-14 07:11:26,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:11:26,399 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 07:11:26,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:11:26,585 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 38 proven. 49 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-12-14 07:11:26,585 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 07:11:26,586 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1772457998] [2022-12-14 07:11:26,586 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1772457998] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 07:11:26,586 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1795008771] [2022-12-14 07:11:26,586 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 07:11:26,586 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 07:11:26,586 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68d1f820-b3bd-44ff-981c-6d5644e6ec24/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 07:11:26,587 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68d1f820-b3bd-44ff-981c-6d5644e6ec24/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 07:11:26,588 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68d1f820-b3bd-44ff-981c-6d5644e6ec24/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2022-12-14 07:11:26,823 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-12-14 07:11:26,823 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 07:11:26,825 INFO L263 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 53 conjunts are in the unsatisfiable core [2022-12-14 07:11:26,827 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 07:11:27,109 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-12-14 07:11:30,044 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 8 proven. 21 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2022-12-14 07:11:30,044 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 07:11:31,251 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 85 treesize of output 81 [2022-12-14 07:11:31,766 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 1 proven. 36 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2022-12-14 07:11:31,766 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1795008771] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 07:11:31,766 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1971774608] [2022-12-14 07:11:31,766 INFO L159 IcfgInterpreter]: Started Sifa with 23 locations of interest [2022-12-14 07:11:31,766 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 07:11:31,767 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 07:11:31,767 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 07:11:31,767 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 07:11:32,004 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-12-14 07:11:32,008 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 10 treesize of output 9 [2022-12-14 07:11:32,039 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 6 [2022-12-14 07:11:32,099 INFO L321 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2022-12-14 07:11:32,099 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 127 treesize of output 127 [2022-12-14 07:11:32,119 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-12-14 07:11:32,119 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 128 treesize of output 130 [2022-12-14 07:11:32,185 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 6 treesize of output 4 [2022-12-14 07:11:32,192 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-12-14 07:11:32,259 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 6 treesize of output 4 [2022-12-14 07:11:32,267 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-12-14 07:11:32,336 INFO L321 Elim1Store]: treesize reduction 38, result has 11.6 percent of original size [2022-12-14 07:11:32,336 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 210 treesize of output 206 [2022-12-14 07:11:32,384 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:11:32,393 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 07:11:32,393 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 25 treesize of output 25 [2022-12-14 07:11:32,418 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:11:32,426 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 07:11:32,426 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 25 treesize of output 25 [2022-12-14 07:11:32,444 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:11:32,452 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 07:11:32,452 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 25 treesize of output 25 [2022-12-14 07:11:32,514 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:11:32,514 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 0 case distinctions, treesize of input 34 treesize of output 26 [2022-12-14 07:11:32,568 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:11:32,568 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 0 case distinctions, treesize of input 36 treesize of output 28 [2022-12-14 07:11:32,616 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:11:32,617 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 0 case distinctions, treesize of input 36 treesize of output 28 [2022-12-14 07:11:32,751 INFO L197 IcfgInterpreter]: Interpreting procedure #Ultimate.meminit with input of size 70 for LOIs [2022-12-14 07:11:32,768 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 8 for LOIs [2022-12-14 07:11:32,769 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 07:11:41,617 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '29259#(and (<= 0 |ULTIMATE.start_upsweep_#in~a#1.offset|) (<= |ULTIMATE.start_main_~n~0#1| 2147483647) (<= 0 |ULTIMATE.start_upsweep_~a#1.offset|) (<= 1 |ULTIMATE.start_upsweep_#in~n#1|) (<= 0 |ULTIMATE.start_main_~a~0#1.offset|) (<= 0 |ULTIMATE.start_is_pow2_#res#1|) (<= |ULTIMATE.start_upsweep_#in~a#1.offset| 0) (= |ULTIMATE.start_main_#t~malloc16#1.offset| 0) (<= 0 (+ |ULTIMATE.start_is_pow2_#in~x#1| 2147483648)) (= (select (select |#memory_int| |ULTIMATE.start_upsweep_~a#1.base|) (+ (* 4 |ULTIMATE.start_upsweep_~left~0#1|) |ULTIMATE.start_upsweep_~a#1.offset|)) |ULTIMATE.start_upsweep_#t~mem5#1|) (= |ULTIMATE.start_upsweep_~right~0#1| (+ |ULTIMATE.start_upsweep_~space~0#1| |ULTIMATE.start_upsweep_~left~0#1|)) (<= (+ (* 4 |ULTIMATE.start_upsweep_~left~0#1|) |ULTIMATE.start_upsweep_~a#1.offset| 4) (select |#length| |ULTIMATE.start_upsweep_~a#1.base|)) (<= |ULTIMATE.start_upsweep_~a#1.offset| 0) (<= |ULTIMATE.start_is_pow2_#res#1| 1) (<= |ULTIMATE.start_upsweep_#in~n#1| 2147483647) (<= 0 (+ (* 4 |ULTIMATE.start_upsweep_~left~0#1|) |ULTIMATE.start_upsweep_~a#1.offset|)) (<= 1 |ULTIMATE.start_main_~n~0#1|) (<= 1 |ULTIMATE.start_main_~i~1#1|) (<= |ULTIMATE.start_upsweep_~n#1| 2147483647) (= (select |#valid| |ULTIMATE.start_upsweep_~a#1.base|) 1) (< |ULTIMATE.start_upsweep_~left~0#1| |ULTIMATE.start_upsweep_~n#1|) (<= 0 |ULTIMATE.start_main_~a0~0#1.offset|) (= |#NULL.offset| 0) (<= |ULTIMATE.start_is_pow2_#in~x#1| 2147483647) (= |ULTIMATE.start_main_#t~malloc15#1.offset| 0) (<= |ULTIMATE.start_main_~a0~0#1.offset| 0) (not (<= (+ (* |ULTIMATE.start_upsweep_~right~0#1| 4) |ULTIMATE.start_upsweep_~a#1.offset| 4) (select |#length| |ULTIMATE.start_upsweep_~a#1.base|))) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~a~0#1.offset| 0) (= |#NULL.base| 0))' at error location [2022-12-14 07:11:41,617 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 07:11:41,617 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 07:11:41,617 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 16, 16] total 42 [2022-12-14 07:11:41,617 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [894824962] [2022-12-14 07:11:41,617 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 07:11:41,618 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-12-14 07:11:41,618 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 07:11:41,618 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-12-14 07:11:41,618 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=289, Invalid=3741, Unknown=2, NotChecked=0, Total=4032 [2022-12-14 07:11:41,619 INFO L87 Difference]: Start difference. First operand 249 states and 288 transitions. Second operand has 42 states, 39 states have (on average 2.3333333333333335) internal successors, (91), 40 states have internal predecessors, (91), 7 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (10), 7 states have call predecessors, (10), 7 states have call successors, (10) [2022-12-14 07:11:49,886 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 07:11:51,962 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 07:11:54,318 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 07:12:00,274 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 07:12:02,732 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 07:12:05,677 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 07:12:07,966 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 07:12:10,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:12:10,343 INFO L93 Difference]: Finished difference Result 286 states and 326 transitions. [2022-12-14 07:12:10,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-12-14 07:12:10,344 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 39 states have (on average 2.3333333333333335) internal successors, (91), 40 states have internal predecessors, (91), 7 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (10), 7 states have call predecessors, (10), 7 states have call successors, (10) Word has length 62 [2022-12-14 07:12:10,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:12:10,344 INFO L225 Difference]: With dead ends: 286 [2022-12-14 07:12:10,344 INFO L226 Difference]: Without dead ends: 263 [2022-12-14 07:12:10,345 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 244 GetRequests, 135 SyntacticMatches, 2 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3333 ImplicationChecksByTransitivity, 22.4s TimeCoverageRelationStatistics Valid=1065, Invalid=10704, Unknown=3, NotChecked=0, Total=11772 [2022-12-14 07:12:10,345 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 302 mSDsluCounter, 426 mSDsCounter, 0 mSdLazyCounter, 1962 mSolverCounterSat, 34 mSolverCounterUnsat, 7 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 17.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 305 SdHoareTripleChecker+Valid, 455 SdHoareTripleChecker+Invalid, 2003 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 1962 IncrementalHoareTripleChecker+Invalid, 7 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 18.0s IncrementalHoareTripleChecker+Time [2022-12-14 07:12:10,345 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [305 Valid, 455 Invalid, 2003 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 1962 Invalid, 7 Unknown, 0 Unchecked, 18.0s Time] [2022-12-14 07:12:10,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 263 states. [2022-12-14 07:12:10,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 263 to 219. [2022-12-14 07:12:10,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 219 states, 206 states have (on average 1.1359223300970873) internal successors, (234), 209 states have internal predecessors, (234), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-12-14 07:12:10,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219 states to 219 states and 248 transitions. [2022-12-14 07:12:10,348 INFO L78 Accepts]: Start accepts. Automaton has 219 states and 248 transitions. Word has length 62 [2022-12-14 07:12:10,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:12:10,349 INFO L495 AbstractCegarLoop]: Abstraction has 219 states and 248 transitions. [2022-12-14 07:12:10,349 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 39 states have (on average 2.3333333333333335) internal successors, (91), 40 states have internal predecessors, (91), 7 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (10), 7 states have call predecessors, (10), 7 states have call successors, (10) [2022-12-14 07:12:10,349 INFO L276 IsEmpty]: Start isEmpty. Operand 219 states and 248 transitions. [2022-12-14 07:12:10,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-12-14 07:12:10,349 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:12:10,350 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 07:12:10,354 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68d1f820-b3bd-44ff-981c-6d5644e6ec24/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Ended with exit code 0 [2022-12-14 07:12:10,550 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68d1f820-b3bd-44ff-981c-6d5644e6ec24/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2022-12-14 07:12:10,551 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2022-12-14 07:12:10,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:12:10,552 INFO L85 PathProgramCache]: Analyzing trace with hash 1870173870, now seen corresponding path program 2 times [2022-12-14 07:12:10,552 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 07:12:10,552 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1407816881] [2022-12-14 07:12:10,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:12:10,553 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 07:12:10,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:12:10,821 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-12-14 07:12:10,821 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 07:12:10,821 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1407816881] [2022-12-14 07:12:10,821 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1407816881] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 07:12:10,822 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1227367860] [2022-12-14 07:12:10,822 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 07:12:10,822 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 07:12:10,822 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68d1f820-b3bd-44ff-981c-6d5644e6ec24/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 07:12:10,823 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68d1f820-b3bd-44ff-981c-6d5644e6ec24/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 07:12:10,823 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68d1f820-b3bd-44ff-981c-6d5644e6ec24/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2022-12-14 07:12:10,991 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-12-14 07:12:10,991 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 07:12:10,993 INFO L263 TraceCheckSpWp]: Trace formula consists of 326 conjuncts, 74 conjunts are in the unsatisfiable core [2022-12-14 07:12:10,996 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 07:12:11,106 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 07:12:11,212 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 07:12:11,212 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 27 treesize of output 24 [2022-12-14 07:12:11,290 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 07:12:11,563 INFO L321 Elim1Store]: treesize reduction 11, result has 21.4 percent of original size [2022-12-14 07:12:11,563 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 40 treesize of output 23 [2022-12-14 07:12:11,583 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2022-12-14 07:12:11,583 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 07:12:11,731 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 36 treesize of output 32 [2022-12-14 07:12:11,951 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 39 treesize of output 37 [2022-12-14 07:12:11,958 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 44 [2022-12-14 07:12:12,348 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2022-12-14 07:12:12,348 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1227367860] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 07:12:12,348 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [276955092] [2022-12-14 07:12:12,349 INFO L159 IcfgInterpreter]: Started Sifa with 35 locations of interest [2022-12-14 07:12:12,349 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 07:12:12,349 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 07:12:12,349 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 07:12:12,349 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 07:12:12,514 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 10 treesize of output 9 [2022-12-14 07:12:12,525 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-12-14 07:12:12,550 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 6 [2022-12-14 07:12:12,615 INFO L321 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2022-12-14 07:12:12,616 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 127 treesize of output 127 [2022-12-14 07:12:12,637 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-12-14 07:12:12,637 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 128 treesize of output 130 [2022-12-14 07:12:12,703 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 6 treesize of output 4 [2022-12-14 07:12:12,712 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-12-14 07:12:12,777 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 6 treesize of output 4 [2022-12-14 07:12:12,784 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-12-14 07:12:12,822 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 20 [2022-12-14 07:12:12,900 INFO L321 Elim1Store]: treesize reduction 84, result has 9.7 percent of original size [2022-12-14 07:12:12,901 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 259 treesize of output 256 [2022-12-14 07:12:12,955 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:12:12,968 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 07:12:12,969 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 07:12:12,990 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:12:13,002 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 07:12:13,002 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 25 treesize of output 25 [2022-12-14 07:12:13,209 INFO L321 Elim1Store]: treesize reduction 72, result has 32.7 percent of original size [2022-12-14 07:12:13,209 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 280 treesize of output 301 [2022-12-14 07:12:13,329 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-12-14 07:12:13,349 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:12:13,351 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:12:13,378 INFO L321 Elim1Store]: treesize reduction 28, result has 60.6 percent of original size [2022-12-14 07:12:13,379 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 2 case distinctions, treesize of input 47 treesize of output 80 [2022-12-14 07:12:13,411 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-12-14 07:12:13,437 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:12:13,438 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:12:13,440 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:12:13,473 INFO L321 Elim1Store]: treesize reduction 28, result has 60.6 percent of original size [2022-12-14 07:12:13,474 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 45 treesize of output 68 [2022-12-14 07:12:13,572 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:12:13,572 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 0 case distinctions, treesize of input 36 treesize of output 28 [2022-12-14 07:12:13,625 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:12:13,625 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 0 case distinctions, treesize of input 36 treesize of output 28 [2022-12-14 07:12:13,691 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 07:12:13,779 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:12:13,780 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:12:13,816 INFO L321 Elim1Store]: treesize reduction 25, result has 59.7 percent of original size [2022-12-14 07:12:13,816 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 2 case distinctions, treesize of input 57 treesize of output 67 [2022-12-14 07:12:13,886 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:12:13,887 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:12:13,894 INFO L321 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2022-12-14 07:12:13,894 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 1 case distinctions, treesize of input 65 treesize of output 59 [2022-12-14 07:12:14,016 INFO L321 Elim1Store]: treesize reduction 22, result has 59.3 percent of original size [2022-12-14 07:12:14,017 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 33 treesize of output 45 [2022-12-14 07:12:14,076 INFO L321 Elim1Store]: treesize reduction 27, result has 61.4 percent of original size [2022-12-14 07:12:14,076 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 69 treesize of output 77 [2022-12-14 07:12:14,175 INFO L321 Elim1Store]: treesize reduction 22, result has 59.3 percent of original size [2022-12-14 07:12:14,175 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 33 treesize of output 45 [2022-12-14 07:12:14,229 INFO L321 Elim1Store]: treesize reduction 27, result has 61.4 percent of original size [2022-12-14 07:12:14,229 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 69 treesize of output 77 [2022-12-14 07:12:14,336 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:12:14,336 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 0 case distinctions, treesize of input 45 treesize of output 28 [2022-12-14 07:12:14,376 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:12:14,376 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 0 case distinctions, treesize of input 40 treesize of output 31 [2022-12-14 07:12:14,489 INFO L321 Elim1Store]: treesize reduction 43, result has 20.4 percent of original size [2022-12-14 07:12:14,489 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 172 treesize of output 147 [2022-12-14 07:12:14,563 INFO L321 Elim1Store]: treesize reduction 56, result has 20.0 percent of original size [2022-12-14 07:12:14,563 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 192 treesize of output 164 [2022-12-14 07:12:14,716 INFO L321 Elim1Store]: treesize reduction 22, result has 59.3 percent of original size [2022-12-14 07:12:14,717 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 33 treesize of output 45 [2022-12-14 07:12:14,770 INFO L321 Elim1Store]: treesize reduction 27, result has 61.4 percent of original size [2022-12-14 07:12:14,770 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 69 treesize of output 77 [2022-12-14 07:12:14,875 INFO L321 Elim1Store]: treesize reduction 22, result has 59.3 percent of original size [2022-12-14 07:12:14,876 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 33 treesize of output 45 [2022-12-14 07:12:14,933 INFO L321 Elim1Store]: treesize reduction 27, result has 61.4 percent of original size [2022-12-14 07:12:14,933 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 2 case distinctions, treesize of input 69 treesize of output 77 [2022-12-14 07:12:15,184 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:12:15,184 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 0 case distinctions, treesize of input 45 treesize of output 28 [2022-12-14 07:12:15,218 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:12:15,219 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 0 case distinctions, treesize of input 38 treesize of output 29 [2022-12-14 07:12:15,343 INFO L321 Elim1Store]: treesize reduction 43, result has 20.4 percent of original size [2022-12-14 07:12:15,344 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 158 treesize of output 133 [2022-12-14 07:12:15,406 INFO L321 Elim1Store]: treesize reduction 56, result has 20.0 percent of original size [2022-12-14 07:12:15,407 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 178 treesize of output 150 [2022-12-14 07:12:15,555 INFO L321 Elim1Store]: treesize reduction 22, result has 59.3 percent of original size [2022-12-14 07:12:15,555 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 33 treesize of output 45 [2022-12-14 07:12:15,611 INFO L321 Elim1Store]: treesize reduction 27, result has 61.4 percent of original size [2022-12-14 07:12:15,611 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 69 treesize of output 77 [2022-12-14 07:12:15,730 INFO L321 Elim1Store]: treesize reduction 22, result has 59.3 percent of original size [2022-12-14 07:12:15,730 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 33 treesize of output 45 [2022-12-14 07:12:15,792 INFO L321 Elim1Store]: treesize reduction 27, result has 61.4 percent of original size [2022-12-14 07:12:15,792 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 69 treesize of output 77 [2022-12-14 07:12:16,022 INFO L197 IcfgInterpreter]: Interpreting procedure #Ultimate.meminit with input of size 70 for LOIs [2022-12-14 07:12:16,042 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 8 for LOIs [2022-12-14 07:12:16,043 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 07:12:26,132 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '30292#(and (<= 0 |ULTIMATE.start_upsweep_#in~a#1.offset|) (<= |ULTIMATE.start_main_~n~0#1| 2147483647) (<= 0 |ULTIMATE.start_upsweep_~a#1.offset|) (= |ULTIMATE.start_check_~a#1.offset| |ULTIMATE.start_check_#in~a#1.offset|) (= |ULTIMATE.start_check_#in~n#1| |ULTIMATE.start_check_~n#1|) (< |ULTIMATE.start_check_~i~0#1| |ULTIMATE.start_check_~n#1|) (<= 0 (+ |ULTIMATE.start_downsweep_~n#1| 2147483648)) (= (ite (= |ULTIMATE.start_check_#t~mem11#1| |ULTIMATE.start_check_~sum~0#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 (+ |ULTIMATE.start_downsweep_#in~n#1| 2147483648)) (= |ULTIMATE.start_check_#in~a#1.base| |ULTIMATE.start_main_~a~0#1.base|) (<= 0 |ULTIMATE.start_is_pow2_#res#1|) (= |ULTIMATE.start_check_#in~a0#1.base| |ULTIMATE.start_check_~a0#1.base|) (<= 0 |ULTIMATE.start_main_~i~1#1|) (<= |ULTIMATE.start_upsweep_#in~a#1.offset| 0) (<= |ULTIMATE.start_downsweep_~n#1| 2147483647) (not (< 0 |ULTIMATE.start_downsweep_~space#1|)) (<= 0 |ULTIMATE.start_downsweep_~a#1.offset|) (= |ULTIMATE.start_main_#t~malloc16#1.offset| 0) (<= |ULTIMATE.start_upsweep_#res#1| 2147483647) (<= 0 (+ |ULTIMATE.start_is_pow2_#in~x#1| 2147483648)) (<= 0 (+ |ULTIMATE.start_upsweep_#res#1| 2147483648)) (= |ULTIMATE.start_check_~sum~0#1| 0) (= |ULTIMATE.start_main_~a0~0#1.base| |ULTIMATE.start_check_#in~a0#1.base|) (= |ULTIMATE.start_check_~i~0#1| 0) (<= 0 (+ |ULTIMATE.start_upsweep_~n#1| 2147483648)) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start_check_#t~mem11#1| (select (select |#memory_int| |ULTIMATE.start_check_~a#1.base|) (+ |ULTIMATE.start_check_~a#1.offset| (* |ULTIMATE.start_check_~i~0#1| 4)))) (<= 0 |ULTIMATE.start_downsweep_#in~a#1.offset|) (<= 0 (+ |ULTIMATE.start_downsweep_#in~space#1| 2147483648)) (= |ULTIMATE.start_main_~a~0#1.offset| |ULTIMATE.start_check_#in~a#1.offset|) (<= |ULTIMATE.start_downsweep_#in~space#1| 2147483647) (<= |ULTIMATE.start_upsweep_~a#1.offset| 0) (= |ULTIMATE.start_main_~n~0#1| |ULTIMATE.start_check_#in~n#1|) (<= |ULTIMATE.start_is_pow2_#res#1| 1) (<= 0 (+ 2147483648 |ULTIMATE.start_main_~space~1#1|)) (= (select |#valid| |ULTIMATE.start_check_~a#1.base|) 1) (<= |ULTIMATE.start_downsweep_~a#1.offset| 0) (<= 0 (+ |ULTIMATE.start_upsweep_#in~n#1| 2147483648)) (<= |ULTIMATE.start_upsweep_#in~n#1| 2147483647) (<= 0 (+ |ULTIMATE.start_upsweep_~space~0#1| 2147483648)) (<= |ULTIMATE.start_upsweep_~n#1| 2147483647) (<= |ULTIMATE.start_upsweep_~space~0#1| 2147483647) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= |ULTIMATE.start_downsweep_#in~n#1| 2147483647) (<= 0 |ULTIMATE.start_main_~a0~0#1.offset|) (= |#NULL.offset| 0) (<= |ULTIMATE.start_is_pow2_#in~x#1| 2147483647) (<= |ULTIMATE.start_downsweep_#in~a#1.offset| 0) (= |ULTIMATE.start_check_#in~a0#1.offset| |ULTIMATE.start_main_~a0~0#1.offset|) (= |ULTIMATE.start_main_#t~malloc15#1.offset| 0) (<= (+ |ULTIMATE.start_check_~a#1.offset| (* |ULTIMATE.start_check_~i~0#1| 4) 4) (select |#length| |ULTIMATE.start_check_~a#1.base|)) (= |ULTIMATE.start_check_~a#1.base| |ULTIMATE.start_check_#in~a#1.base|) (<= |ULTIMATE.start_main_~space~1#1| 2147483647) (<= 0 (+ |ULTIMATE.start_check_~a#1.offset| (* |ULTIMATE.start_check_~i~0#1| 4))) (<= |ULTIMATE.start_main_~a0~0#1.offset| 0) (<= 0 |#StackHeapBarrier|) (= |ULTIMATE.start_check_#in~a0#1.offset| |ULTIMATE.start_check_~a0#1.offset|) (<= |ULTIMATE.start_main_~a~0#1.offset| 0) (= |#NULL.base| 0))' at error location [2022-12-14 07:12:26,132 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 07:12:26,132 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 07:12:26,132 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 15, 15] total 38 [2022-12-14 07:12:26,132 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [260762927] [2022-12-14 07:12:26,132 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 07:12:26,132 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-12-14 07:12:26,132 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 07:12:26,133 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-12-14 07:12:26,133 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=347, Invalid=4623, Unknown=0, NotChecked=0, Total=4970 [2022-12-14 07:12:26,133 INFO L87 Difference]: Start difference. First operand 219 states and 248 transitions. Second operand has 38 states, 38 states have (on average 2.5) internal successors, (95), 38 states have internal predecessors, (95), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-12-14 07:12:27,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:12:27,634 INFO L93 Difference]: Finished difference Result 227 states and 256 transitions. [2022-12-14 07:12:27,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-12-14 07:12:27,634 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.5) internal successors, (95), 38 states have internal predecessors, (95), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 64 [2022-12-14 07:12:27,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:12:27,635 INFO L225 Difference]: With dead ends: 227 [2022-12-14 07:12:27,635 INFO L226 Difference]: Without dead ends: 227 [2022-12-14 07:12:27,635 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 134 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2126 ImplicationChecksByTransitivity, 11.6s TimeCoverageRelationStatistics Valid=672, Invalid=6468, Unknown=0, NotChecked=0, Total=7140 [2022-12-14 07:12:27,636 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 330 mSDsluCounter, 322 mSDsCounter, 0 mSdLazyCounter, 967 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 330 SdHoareTripleChecker+Valid, 347 SdHoareTripleChecker+Invalid, 974 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 967 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-12-14 07:12:27,636 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [330 Valid, 347 Invalid, 974 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 967 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-12-14 07:12:27,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2022-12-14 07:12:27,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 219. [2022-12-14 07:12:27,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 219 states, 206 states have (on average 1.1359223300970873) internal successors, (234), 209 states have internal predecessors, (234), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-12-14 07:12:27,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219 states to 219 states and 248 transitions. [2022-12-14 07:12:27,640 INFO L78 Accepts]: Start accepts. Automaton has 219 states and 248 transitions. Word has length 64 [2022-12-14 07:12:27,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:12:27,640 INFO L495 AbstractCegarLoop]: Abstraction has 219 states and 248 transitions. [2022-12-14 07:12:27,640 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 2.5) internal successors, (95), 38 states have internal predecessors, (95), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-12-14 07:12:27,640 INFO L276 IsEmpty]: Start isEmpty. Operand 219 states and 248 transitions. [2022-12-14 07:12:27,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-12-14 07:12:27,641 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:12:27,641 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 07:12:27,646 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68d1f820-b3bd-44ff-981c-6d5644e6ec24/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Ended with exit code 0 [2022-12-14 07:12:27,841 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68d1f820-b3bd-44ff-981c-6d5644e6ec24/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2022-12-14 07:12:27,842 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2022-12-14 07:12:27,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:12:27,843 INFO L85 PathProgramCache]: Analyzing trace with hash 1183799248, now seen corresponding path program 3 times [2022-12-14 07:12:27,844 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 07:12:27,844 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2037858193] [2022-12-14 07:12:27,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:12:27,844 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 07:12:27,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:12:28,032 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 5 proven. 24 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-12-14 07:12:28,032 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 07:12:28,032 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2037858193] [2022-12-14 07:12:28,032 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2037858193] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 07:12:28,032 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1570105453] [2022-12-14 07:12:28,032 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 07:12:28,032 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 07:12:28,032 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68d1f820-b3bd-44ff-981c-6d5644e6ec24/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 07:12:28,033 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68d1f820-b3bd-44ff-981c-6d5644e6ec24/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 07:12:28,034 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68d1f820-b3bd-44ff-981c-6d5644e6ec24/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2022-12-14 07:12:28,210 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 07:12:28,210 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 07:12:28,212 INFO L263 TraceCheckSpWp]: Trace formula consists of 422 conjuncts, 18 conjunts are in the unsatisfiable core [2022-12-14 07:12:28,213 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 07:12:28,356 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 16 proven. 25 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-12-14 07:12:28,357 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 07:12:28,571 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 16 proven. 25 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-12-14 07:12:28,571 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1570105453] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 07:12:28,571 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1304255420] [2022-12-14 07:12:28,572 INFO L159 IcfgInterpreter]: Started Sifa with 35 locations of interest [2022-12-14 07:12:28,572 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 07:12:28,572 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 07:12:28,572 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 07:12:28,572 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 07:12:28,772 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-12-14 07:12:28,785 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 10 treesize of output 9 [2022-12-14 07:12:28,814 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 6 [2022-12-14 07:12:28,887 INFO L321 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2022-12-14 07:12:28,888 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 127 treesize of output 127 [2022-12-14 07:12:28,913 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-12-14 07:12:28,914 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 128 treesize of output 130 [2022-12-14 07:12:28,982 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 6 treesize of output 4 [2022-12-14 07:12:28,992 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-12-14 07:12:29,058 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 6 treesize of output 4 [2022-12-14 07:12:29,067 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-12-14 07:12:29,110 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 20 [2022-12-14 07:12:29,190 INFO L321 Elim1Store]: treesize reduction 84, result has 9.7 percent of original size [2022-12-14 07:12:29,191 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 265 treesize of output 262 [2022-12-14 07:12:29,258 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:12:29,269 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 07:12:29,269 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 25 treesize of output 25 [2022-12-14 07:12:29,289 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:12:29,300 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 07:12:29,301 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 25 treesize of output 25 [2022-12-14 07:12:29,553 INFO L321 Elim1Store]: treesize reduction 72, result has 32.7 percent of original size [2022-12-14 07:12:29,553 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 283 treesize of output 304 [2022-12-14 07:12:29,766 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:12:29,769 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:12:29,795 INFO L321 Elim1Store]: treesize reduction 28, result has 60.6 percent of original size [2022-12-14 07:12:29,796 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 2 case distinctions, treesize of input 47 treesize of output 80 [2022-12-14 07:12:29,887 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:12:29,890 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:12:29,938 INFO L321 Elim1Store]: treesize reduction 28, result has 60.6 percent of original size [2022-12-14 07:12:29,938 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 2 case distinctions, treesize of input 274 treesize of output 307 [2022-12-14 07:12:30,041 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:12:30,043 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:12:30,046 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:12:30,083 INFO L321 Elim1Store]: treesize reduction 28, result has 60.6 percent of original size [2022-12-14 07:12:30,084 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 272 treesize of output 295 [2022-12-14 07:12:30,138 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:12:30,140 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:12:30,146 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:12:30,205 INFO L321 Elim1Store]: treesize reduction 28, result has 60.6 percent of original size [2022-12-14 07:12:30,205 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 45 treesize of output 68 [2022-12-14 07:12:30,325 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:12:30,326 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 0 case distinctions, treesize of input 36 treesize of output 28 [2022-12-14 07:12:30,386 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:12:30,387 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 0 case distinctions, treesize of input 36 treesize of output 28 [2022-12-14 07:12:30,450 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 07:12:30,537 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:12:30,538 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:12:30,573 INFO L321 Elim1Store]: treesize reduction 25, result has 59.7 percent of original size [2022-12-14 07:12:30,574 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 2 case distinctions, treesize of input 57 treesize of output 67 [2022-12-14 07:12:30,621 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:12:30,623 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:12:30,630 INFO L321 Elim1Store]: treesize reduction 17, result has 5.6 percent of original size [2022-12-14 07:12:30,630 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 1 case distinctions, treesize of input 103 treesize of output 78 [2022-12-14 07:12:30,743 INFO L321 Elim1Store]: treesize reduction 22, result has 59.3 percent of original size [2022-12-14 07:12:30,743 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 33 treesize of output 45 [2022-12-14 07:12:30,797 INFO L321 Elim1Store]: treesize reduction 27, result has 61.4 percent of original size [2022-12-14 07:12:30,797 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 2 case distinctions, treesize of input 69 treesize of output 77 [2022-12-14 07:12:30,897 INFO L321 Elim1Store]: treesize reduction 22, result has 59.3 percent of original size [2022-12-14 07:12:30,897 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 33 treesize of output 45 [2022-12-14 07:12:30,959 INFO L321 Elim1Store]: treesize reduction 27, result has 61.4 percent of original size [2022-12-14 07:12:30,960 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 69 treesize of output 77 [2022-12-14 07:12:31,076 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:12:31,077 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 0 case distinctions, treesize of input 45 treesize of output 28 [2022-12-14 07:12:31,105 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:12:31,105 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 0 case distinctions, treesize of input 40 treesize of output 31 [2022-12-14 07:12:31,223 INFO L321 Elim1Store]: treesize reduction 43, result has 20.4 percent of original size [2022-12-14 07:12:31,224 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 172 treesize of output 147 [2022-12-14 07:12:31,287 INFO L321 Elim1Store]: treesize reduction 56, result has 20.0 percent of original size [2022-12-14 07:12:31,287 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 192 treesize of output 164 [2022-12-14 07:12:31,431 INFO L321 Elim1Store]: treesize reduction 22, result has 59.3 percent of original size [2022-12-14 07:12:31,431 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 45 [2022-12-14 07:12:31,485 INFO L321 Elim1Store]: treesize reduction 27, result has 61.4 percent of original size [2022-12-14 07:12:31,486 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 69 treesize of output 77 [2022-12-14 07:12:31,586 INFO L321 Elim1Store]: treesize reduction 22, result has 59.3 percent of original size [2022-12-14 07:12:31,587 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 33 treesize of output 45 [2022-12-14 07:12:31,644 INFO L321 Elim1Store]: treesize reduction 27, result has 61.4 percent of original size [2022-12-14 07:12:31,644 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 69 treesize of output 77 [2022-12-14 07:12:31,898 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:12:31,898 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 0 case distinctions, treesize of input 45 treesize of output 28 [2022-12-14 07:12:31,924 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:12:31,925 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 0 case distinctions, treesize of input 40 treesize of output 31 [2022-12-14 07:12:32,049 INFO L321 Elim1Store]: treesize reduction 43, result has 20.4 percent of original size [2022-12-14 07:12:32,049 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 172 treesize of output 147 [2022-12-14 07:12:32,111 INFO L321 Elim1Store]: treesize reduction 56, result has 20.0 percent of original size [2022-12-14 07:12:32,111 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 192 treesize of output 164 [2022-12-14 07:12:32,273 INFO L321 Elim1Store]: treesize reduction 22, result has 59.3 percent of original size [2022-12-14 07:12:32,274 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 33 treesize of output 45 [2022-12-14 07:12:32,333 INFO L321 Elim1Store]: treesize reduction 27, result has 61.4 percent of original size [2022-12-14 07:12:32,334 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 69 treesize of output 77 [2022-12-14 07:12:32,442 INFO L321 Elim1Store]: treesize reduction 22, result has 59.3 percent of original size [2022-12-14 07:12:32,443 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 33 treesize of output 45 [2022-12-14 07:12:32,498 INFO L321 Elim1Store]: treesize reduction 27, result has 61.4 percent of original size [2022-12-14 07:12:32,499 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 69 treesize of output 77 [2022-12-14 07:12:32,701 INFO L197 IcfgInterpreter]: Interpreting procedure #Ultimate.meminit with input of size 70 for LOIs [2022-12-14 07:12:32,722 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 8 for LOIs [2022-12-14 07:12:32,723 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 07:12:41,435 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '31214#(and (<= 0 |ULTIMATE.start_upsweep_#in~a#1.offset|) (<= |ULTIMATE.start_main_~n~0#1| 2147483647) (<= 0 |ULTIMATE.start_upsweep_~a#1.offset|) (= |ULTIMATE.start_check_~a#1.offset| |ULTIMATE.start_check_#in~a#1.offset|) (= |ULTIMATE.start_check_#in~n#1| |ULTIMATE.start_check_~n#1|) (< |ULTIMATE.start_check_~i~0#1| |ULTIMATE.start_check_~n#1|) (<= 0 (+ |ULTIMATE.start_downsweep_~n#1| 2147483648)) (= (ite (= |ULTIMATE.start_check_#t~mem11#1| |ULTIMATE.start_check_~sum~0#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 (+ |ULTIMATE.start_downsweep_#in~n#1| 2147483648)) (= |ULTIMATE.start_check_#in~a#1.base| |ULTIMATE.start_main_~a~0#1.base|) (<= 0 |ULTIMATE.start_is_pow2_#res#1|) (= |ULTIMATE.start_check_#in~a0#1.base| |ULTIMATE.start_check_~a0#1.base|) (<= 0 |ULTIMATE.start_main_~i~1#1|) (<= |ULTIMATE.start_upsweep_#in~a#1.offset| 0) (<= |ULTIMATE.start_downsweep_~n#1| 2147483647) (not (< 0 |ULTIMATE.start_downsweep_~space#1|)) (<= 0 |ULTIMATE.start_downsweep_~a#1.offset|) (= |ULTIMATE.start_main_#t~malloc16#1.offset| 0) (<= |ULTIMATE.start_upsweep_#res#1| 2147483647) (<= 0 (+ |ULTIMATE.start_is_pow2_#in~x#1| 2147483648)) (<= 0 (+ |ULTIMATE.start_upsweep_#res#1| 2147483648)) (= |ULTIMATE.start_check_~sum~0#1| 0) (= |ULTIMATE.start_main_~a0~0#1.base| |ULTIMATE.start_check_#in~a0#1.base|) (= |ULTIMATE.start_check_~i~0#1| 0) (<= 0 (+ |ULTIMATE.start_upsweep_~n#1| 2147483648)) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start_check_#t~mem11#1| (select (select |#memory_int| |ULTIMATE.start_check_~a#1.base|) (+ |ULTIMATE.start_check_~a#1.offset| (* |ULTIMATE.start_check_~i~0#1| 4)))) (<= 0 |ULTIMATE.start_downsweep_#in~a#1.offset|) (<= 0 (+ |ULTIMATE.start_downsweep_#in~space#1| 2147483648)) (= |ULTIMATE.start_main_~a~0#1.offset| |ULTIMATE.start_check_#in~a#1.offset|) (<= |ULTIMATE.start_downsweep_#in~space#1| 2147483647) (<= |ULTIMATE.start_upsweep_~a#1.offset| 0) (= |ULTIMATE.start_main_~n~0#1| |ULTIMATE.start_check_#in~n#1|) (<= |ULTIMATE.start_is_pow2_#res#1| 1) (<= 0 (+ 2147483648 |ULTIMATE.start_main_~space~1#1|)) (= (select |#valid| |ULTIMATE.start_check_~a#1.base|) 1) (<= |ULTIMATE.start_downsweep_~a#1.offset| 0) (<= 0 (+ |ULTIMATE.start_upsweep_#in~n#1| 2147483648)) (<= |ULTIMATE.start_upsweep_#in~n#1| 2147483647) (<= 0 (+ |ULTIMATE.start_upsweep_~space~0#1| 2147483648)) (<= |ULTIMATE.start_upsweep_~n#1| 2147483647) (<= |ULTIMATE.start_upsweep_~space~0#1| 2147483647) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= |ULTIMATE.start_downsweep_#in~n#1| 2147483647) (<= 0 |ULTIMATE.start_main_~a0~0#1.offset|) (= |#NULL.offset| 0) (<= |ULTIMATE.start_is_pow2_#in~x#1| 2147483647) (<= |ULTIMATE.start_downsweep_#in~a#1.offset| 0) (= |ULTIMATE.start_check_#in~a0#1.offset| |ULTIMATE.start_main_~a0~0#1.offset|) (= |ULTIMATE.start_main_#t~malloc15#1.offset| 0) (<= (+ |ULTIMATE.start_check_~a#1.offset| (* |ULTIMATE.start_check_~i~0#1| 4) 4) (select |#length| |ULTIMATE.start_check_~a#1.base|)) (= |ULTIMATE.start_check_~a#1.base| |ULTIMATE.start_check_#in~a#1.base|) (<= |ULTIMATE.start_main_~space~1#1| 2147483647) (<= 0 (+ |ULTIMATE.start_check_~a#1.offset| (* |ULTIMATE.start_check_~i~0#1| 4))) (<= |ULTIMATE.start_main_~a0~0#1.offset| 0) (<= 0 |#StackHeapBarrier|) (= |ULTIMATE.start_check_#in~a0#1.offset| |ULTIMATE.start_check_~a0#1.offset|) (<= |ULTIMATE.start_main_~a~0#1.offset| 0) (= |#NULL.base| 0))' at error location [2022-12-14 07:12:41,435 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 07:12:41,435 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 07:12:41,435 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13, 13] total 25 [2022-12-14 07:12:41,435 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1772550159] [2022-12-14 07:12:41,435 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 07:12:41,435 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-12-14 07:12:41,435 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 07:12:41,436 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-12-14 07:12:41,436 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=295, Invalid=3011, Unknown=0, NotChecked=0, Total=3306 [2022-12-14 07:12:41,436 INFO L87 Difference]: Start difference. First operand 219 states and 248 transitions. Second operand has 25 states, 25 states have (on average 3.76) internal successors, (94), 25 states have internal predecessors, (94), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-12-14 07:12:41,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:12:41,971 INFO L93 Difference]: Finished difference Result 284 states and 321 transitions. [2022-12-14 07:12:41,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-12-14 07:12:41,971 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 3.76) internal successors, (94), 25 states have internal predecessors, (94), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 66 [2022-12-14 07:12:41,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:12:41,972 INFO L225 Difference]: With dead ends: 284 [2022-12-14 07:12:41,972 INFO L226 Difference]: Without dead ends: 284 [2022-12-14 07:12:41,972 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 226 GetRequests, 148 SyntacticMatches, 5 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1754 ImplicationChecksByTransitivity, 9.2s TimeCoverageRelationStatistics Valid=578, Invalid=4972, Unknown=0, NotChecked=0, Total=5550 [2022-12-14 07:12:41,973 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 562 mSDsluCounter, 239 mSDsCounter, 0 mSdLazyCounter, 466 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 562 SdHoareTripleChecker+Valid, 263 SdHoareTripleChecker+Invalid, 483 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 466 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 07:12:41,973 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [562 Valid, 263 Invalid, 483 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 466 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 07:12:41,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 284 states. [2022-12-14 07:12:41,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 284 to 255. [2022-12-14 07:12:41,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 255 states, 242 states have (on average 1.1446280991735538) internal successors, (277), 245 states have internal predecessors, (277), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-12-14 07:12:41,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 255 states to 255 states and 291 transitions. [2022-12-14 07:12:41,976 INFO L78 Accepts]: Start accepts. Automaton has 255 states and 291 transitions. Word has length 66 [2022-12-14 07:12:41,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:12:41,976 INFO L495 AbstractCegarLoop]: Abstraction has 255 states and 291 transitions. [2022-12-14 07:12:41,976 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 3.76) internal successors, (94), 25 states have internal predecessors, (94), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-12-14 07:12:41,976 INFO L276 IsEmpty]: Start isEmpty. Operand 255 states and 291 transitions. [2022-12-14 07:12:41,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-12-14 07:12:41,976 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:12:41,976 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 5, 5, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 07:12:41,982 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68d1f820-b3bd-44ff-981c-6d5644e6ec24/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Ended with exit code 0 [2022-12-14 07:12:42,177 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68d1f820-b3bd-44ff-981c-6d5644e6ec24/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2022-12-14 07:12:42,178 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2022-12-14 07:12:42,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:12:42,179 INFO L85 PathProgramCache]: Analyzing trace with hash 1604434433, now seen corresponding path program 9 times [2022-12-14 07:12:42,179 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 07:12:42,179 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [225598427] [2022-12-14 07:12:42,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:12:42,180 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 07:12:42,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:12:42,479 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 75 proven. 59 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-12-14 07:12:42,480 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 07:12:42,480 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [225598427] [2022-12-14 07:12:42,480 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [225598427] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 07:12:42,480 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1307170566] [2022-12-14 07:12:42,480 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 07:12:42,480 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 07:12:42,480 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68d1f820-b3bd-44ff-981c-6d5644e6ec24/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 07:12:42,481 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68d1f820-b3bd-44ff-981c-6d5644e6ec24/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 07:12:42,481 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68d1f820-b3bd-44ff-981c-6d5644e6ec24/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2022-12-14 07:12:42,592 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 07:12:42,592 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 07:12:42,593 INFO L263 TraceCheckSpWp]: Trace formula consists of 324 conjuncts, 17 conjunts are in the unsatisfiable core [2022-12-14 07:12:42,595 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 07:12:42,762 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 94 proven. 37 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-12-14 07:12:42,762 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 07:12:42,952 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 94 proven. 37 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-12-14 07:12:42,952 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1307170566] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 07:12:42,952 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1746530695] [2022-12-14 07:12:42,953 INFO L159 IcfgInterpreter]: Started Sifa with 23 locations of interest [2022-12-14 07:12:42,953 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 07:12:42,954 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 07:12:42,954 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 07:12:42,954 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 07:12:43,093 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 10 treesize of output 9 [2022-12-14 07:12:43,100 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-12-14 07:12:43,127 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 7 treesize of output 6 [2022-12-14 07:12:43,196 INFO L321 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2022-12-14 07:12:43,197 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 127 treesize of output 127 [2022-12-14 07:12:43,217 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-12-14 07:12:43,217 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 128 treesize of output 130 [2022-12-14 07:12:43,307 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 6 treesize of output 4 [2022-12-14 07:12:43,317 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-12-14 07:12:43,400 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 6 treesize of output 4 [2022-12-14 07:12:43,412 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-12-14 07:12:43,457 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 30 [2022-12-14 07:12:43,544 INFO L321 Elim1Store]: treesize reduction 84, result has 9.7 percent of original size [2022-12-14 07:12:43,544 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 272 treesize of output 269 [2022-12-14 07:12:43,609 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:12:43,618 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 07:12:43,618 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 25 treesize of output 25 [2022-12-14 07:12:43,640 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:12:43,649 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 07:12:43,649 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 25 treesize of output 25 [2022-12-14 07:12:43,903 INFO L321 Elim1Store]: treesize reduction 76, result has 31.5 percent of original size [2022-12-14 07:12:43,903 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 285 treesize of output 306 [2022-12-14 07:12:44,160 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:12:44,163 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:12:44,193 INFO L321 Elim1Store]: treesize reduction 28, result has 60.6 percent of original size [2022-12-14 07:12:44,193 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 2 case distinctions, treesize of input 49 treesize of output 82 [2022-12-14 07:12:44,260 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:12:44,263 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:12:44,304 INFO L321 Elim1Store]: treesize reduction 28, result has 60.6 percent of original size [2022-12-14 07:12:44,305 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 2 case distinctions, treesize of input 276 treesize of output 309 [2022-12-14 07:12:44,404 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:12:44,406 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:12:44,409 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:12:44,446 INFO L321 Elim1Store]: treesize reduction 28, result has 60.6 percent of original size [2022-12-14 07:12:44,446 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 274 treesize of output 297 [2022-12-14 07:12:44,498 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:12:44,500 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:12:44,504 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:12:44,573 INFO L321 Elim1Store]: treesize reduction 28, result has 60.6 percent of original size [2022-12-14 07:12:44,573 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 47 treesize of output 70 [2022-12-14 07:12:44,706 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:12:44,706 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 0 case distinctions, treesize of input 36 treesize of output 28 [2022-12-14 07:12:44,759 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:12:44,759 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 0 case distinctions, treesize of input 36 treesize of output 28 [2022-12-14 07:12:44,884 INFO L197 IcfgInterpreter]: Interpreting procedure #Ultimate.meminit with input of size 70 for LOIs [2022-12-14 07:12:44,902 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 8 for LOIs [2022-12-14 07:12:44,903 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 07:12:49,173 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '32252#(and (<= 0 |ULTIMATE.start_upsweep_#in~a#1.offset|) (<= |ULTIMATE.start_main_~n~0#1| 2147483647) (<= 0 |ULTIMATE.start_upsweep_~a#1.offset|) (<= 1 |ULTIMATE.start_upsweep_#in~n#1|) (<= 0 |ULTIMATE.start_main_~a~0#1.offset|) (<= 0 |ULTIMATE.start_is_pow2_#res#1|) (<= |ULTIMATE.start_upsweep_#in~a#1.offset| 0) (= |ULTIMATE.start_main_#t~malloc16#1.offset| 0) (<= 0 (+ |ULTIMATE.start_is_pow2_#in~x#1| 2147483648)) (= (select (select |#memory_int| |ULTIMATE.start_upsweep_~a#1.base|) (+ (* 4 |ULTIMATE.start_upsweep_~left~0#1|) |ULTIMATE.start_upsweep_~a#1.offset|)) |ULTIMATE.start_upsweep_#t~mem5#1|) (= |ULTIMATE.start_upsweep_~right~0#1| (+ |ULTIMATE.start_upsweep_~space~0#1| |ULTIMATE.start_upsweep_~left~0#1|)) (<= (+ (* 4 |ULTIMATE.start_upsweep_~left~0#1|) |ULTIMATE.start_upsweep_~a#1.offset| 4) (select |#length| |ULTIMATE.start_upsweep_~a#1.base|)) (<= |ULTIMATE.start_upsweep_~a#1.offset| 0) (<= |ULTIMATE.start_is_pow2_#res#1| 1) (<= |ULTIMATE.start_upsweep_#in~n#1| 2147483647) (<= 0 (+ (* 4 |ULTIMATE.start_upsweep_~left~0#1|) |ULTIMATE.start_upsweep_~a#1.offset|)) (<= 1 |ULTIMATE.start_main_~n~0#1|) (<= 1 |ULTIMATE.start_main_~i~1#1|) (<= |ULTIMATE.start_upsweep_~n#1| 2147483647) (= (select |#valid| |ULTIMATE.start_upsweep_~a#1.base|) 1) (< |ULTIMATE.start_upsweep_~left~0#1| |ULTIMATE.start_upsweep_~n#1|) (<= 0 |ULTIMATE.start_main_~a0~0#1.offset|) (= |#NULL.offset| 0) (<= |ULTIMATE.start_is_pow2_#in~x#1| 2147483647) (= |ULTIMATE.start_main_#t~malloc15#1.offset| 0) (<= |ULTIMATE.start_main_~a0~0#1.offset| 0) (not (<= (+ (* |ULTIMATE.start_upsweep_~right~0#1| 4) |ULTIMATE.start_upsweep_~a#1.offset| 4) (select |#length| |ULTIMATE.start_upsweep_~a#1.base|))) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~a~0#1.offset| 0) (= |#NULL.base| 0))' at error location [2022-12-14 07:12:49,173 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 07:12:49,173 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 07:12:49,173 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 30 [2022-12-14 07:12:49,173 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1377323337] [2022-12-14 07:12:49,173 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 07:12:49,174 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-12-14 07:12:49,174 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 07:12:49,174 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-12-14 07:12:49,174 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=267, Invalid=2385, Unknown=0, NotChecked=0, Total=2652 [2022-12-14 07:12:49,174 INFO L87 Difference]: Start difference. First operand 255 states and 291 transitions. Second operand has 30 states, 30 states have (on average 3.2333333333333334) internal successors, (97), 30 states have internal predecessors, (97), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-12-14 07:12:49,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:12:49,762 INFO L93 Difference]: Finished difference Result 299 states and 338 transitions. [2022-12-14 07:12:49,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-12-14 07:12:49,762 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 3.2333333333333334) internal successors, (97), 30 states have internal predecessors, (97), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 68 [2022-12-14 07:12:49,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:12:49,763 INFO L225 Difference]: With dead ends: 299 [2022-12-14 07:12:49,763 INFO L226 Difference]: Without dead ends: 299 [2022-12-14 07:12:49,764 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 231 GetRequests, 163 SyntacticMatches, 7 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1143 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=503, Invalid=3403, Unknown=0, NotChecked=0, Total=3906 [2022-12-14 07:12:49,764 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 310 mSDsluCounter, 341 mSDsCounter, 0 mSdLazyCounter, 654 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 310 SdHoareTripleChecker+Valid, 380 SdHoareTripleChecker+Invalid, 658 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 654 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 07:12:49,764 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [310 Valid, 380 Invalid, 658 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 654 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 07:12:49,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 299 states. [2022-12-14 07:12:49,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 299 to 255. [2022-12-14 07:12:49,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 255 states, 242 states have (on average 1.140495867768595) internal successors, (276), 245 states have internal predecessors, (276), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-12-14 07:12:49,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 255 states to 255 states and 290 transitions. [2022-12-14 07:12:49,767 INFO L78 Accepts]: Start accepts. Automaton has 255 states and 290 transitions. Word has length 68 [2022-12-14 07:12:49,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:12:49,767 INFO L495 AbstractCegarLoop]: Abstraction has 255 states and 290 transitions. [2022-12-14 07:12:49,767 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 3.2333333333333334) internal successors, (97), 30 states have internal predecessors, (97), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-12-14 07:12:49,767 INFO L276 IsEmpty]: Start isEmpty. Operand 255 states and 290 transitions. [2022-12-14 07:12:49,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-12-14 07:12:49,768 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:12:49,768 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 6, 6, 5, 5, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 07:12:49,773 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68d1f820-b3bd-44ff-981c-6d5644e6ec24/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Ended with exit code 0 [2022-12-14 07:12:49,969 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68d1f820-b3bd-44ff-981c-6d5644e6ec24/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2022-12-14 07:12:49,970 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2022-12-14 07:12:49,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:12:49,971 INFO L85 PathProgramCache]: Analyzing trace with hash -701814477, now seen corresponding path program 10 times [2022-12-14 07:12:49,971 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 07:12:49,972 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [641824252] [2022-12-14 07:12:49,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:12:49,972 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 07:12:49,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:12:50,350 INFO L134 CoverageAnalysis]: Checked inductivity of 164 backedges. 57 proven. 69 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2022-12-14 07:12:50,350 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 07:12:50,350 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [641824252] [2022-12-14 07:12:50,350 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [641824252] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 07:12:50,350 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1572235448] [2022-12-14 07:12:50,350 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-14 07:12:50,350 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 07:12:50,350 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68d1f820-b3bd-44ff-981c-6d5644e6ec24/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 07:12:50,351 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68d1f820-b3bd-44ff-981c-6d5644e6ec24/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 07:12:50,352 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68d1f820-b3bd-44ff-981c-6d5644e6ec24/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2022-12-14 07:12:50,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:12:50,493 INFO L263 TraceCheckSpWp]: Trace formula consists of 429 conjuncts, 20 conjunts are in the unsatisfiable core [2022-12-14 07:12:50,495 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 07:12:51,056 INFO L134 CoverageAnalysis]: Checked inductivity of 164 backedges. 22 proven. 40 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2022-12-14 07:12:51,056 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 07:12:51,238 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 29 treesize of output 25 [2022-12-14 07:12:51,538 INFO L134 CoverageAnalysis]: Checked inductivity of 164 backedges. 0 proven. 62 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2022-12-14 07:12:51,538 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1572235448] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 07:12:51,539 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [158290511] [2022-12-14 07:12:51,540 INFO L159 IcfgInterpreter]: Started Sifa with 23 locations of interest [2022-12-14 07:12:51,540 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 07:12:51,540 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 07:12:51,540 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 07:12:51,540 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 07:12:51,691 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 10 treesize of output 9 [2022-12-14 07:12:51,698 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-12-14 07:12:51,726 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 6 [2022-12-14 07:12:51,794 INFO L321 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2022-12-14 07:12:51,795 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 127 treesize of output 127 [2022-12-14 07:12:51,816 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-12-14 07:12:51,816 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 128 treesize of output 130 [2022-12-14 07:12:51,914 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 6 treesize of output 4 [2022-12-14 07:12:51,924 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-12-14 07:12:52,004 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 6 treesize of output 4 [2022-12-14 07:12:52,012 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-12-14 07:12:52,088 INFO L321 Elim1Store]: treesize reduction 28, result has 15.2 percent of original size [2022-12-14 07:12:52,089 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 200 treesize of output 196 [2022-12-14 07:12:52,136 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:12:52,145 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 07:12:52,145 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 25 treesize of output 25 [2022-12-14 07:12:52,166 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:12:52,176 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 07:12:52,176 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 25 treesize of output 25 [2022-12-14 07:12:52,256 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:12:52,256 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 0 case distinctions, treesize of input 34 treesize of output 26 [2022-12-14 07:12:52,307 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:12:52,307 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 0 case distinctions, treesize of input 36 treesize of output 28 [2022-12-14 07:12:52,361 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:12:52,362 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 0 case distinctions, treesize of input 36 treesize of output 28 [2022-12-14 07:12:52,498 INFO L197 IcfgInterpreter]: Interpreting procedure #Ultimate.meminit with input of size 70 for LOIs [2022-12-14 07:12:52,520 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 8 for LOIs [2022-12-14 07:12:52,521 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 07:12:56,868 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '33320#(and (<= 0 |ULTIMATE.start_upsweep_#in~a#1.offset|) (<= |ULTIMATE.start_main_~n~0#1| 2147483647) (<= 0 |ULTIMATE.start_upsweep_~a#1.offset|) (<= 1 |ULTIMATE.start_upsweep_#in~n#1|) (<= 0 |ULTIMATE.start_main_~a~0#1.offset|) (<= 0 |ULTIMATE.start_is_pow2_#res#1|) (<= |ULTIMATE.start_upsweep_#in~a#1.offset| 0) (= |ULTIMATE.start_main_#t~malloc16#1.offset| 0) (<= 0 (+ |ULTIMATE.start_is_pow2_#in~x#1| 2147483648)) (= (select (select |#memory_int| |ULTIMATE.start_upsweep_~a#1.base|) (+ (* 4 |ULTIMATE.start_upsweep_~left~0#1|) |ULTIMATE.start_upsweep_~a#1.offset|)) |ULTIMATE.start_upsweep_#t~mem5#1|) (= |ULTIMATE.start_upsweep_~right~0#1| (+ |ULTIMATE.start_upsweep_~space~0#1| |ULTIMATE.start_upsweep_~left~0#1|)) (<= (+ (* 4 |ULTIMATE.start_upsweep_~left~0#1|) |ULTIMATE.start_upsweep_~a#1.offset| 4) (select |#length| |ULTIMATE.start_upsweep_~a#1.base|)) (<= |ULTIMATE.start_upsweep_~a#1.offset| 0) (<= |ULTIMATE.start_is_pow2_#res#1| 1) (<= |ULTIMATE.start_upsweep_#in~n#1| 2147483647) (<= 0 (+ (* 4 |ULTIMATE.start_upsweep_~left~0#1|) |ULTIMATE.start_upsweep_~a#1.offset|)) (<= 1 |ULTIMATE.start_main_~n~0#1|) (<= 1 |ULTIMATE.start_main_~i~1#1|) (<= |ULTIMATE.start_upsweep_~n#1| 2147483647) (= (select |#valid| |ULTIMATE.start_upsweep_~a#1.base|) 1) (< |ULTIMATE.start_upsweep_~left~0#1| |ULTIMATE.start_upsweep_~n#1|) (<= 0 |ULTIMATE.start_main_~a0~0#1.offset|) (= |#NULL.offset| 0) (<= |ULTIMATE.start_is_pow2_#in~x#1| 2147483647) (= |ULTIMATE.start_main_#t~malloc15#1.offset| 0) (<= |ULTIMATE.start_main_~a0~0#1.offset| 0) (not (<= (+ (* |ULTIMATE.start_upsweep_~right~0#1| 4) |ULTIMATE.start_upsweep_~a#1.offset| 4) (select |#length| |ULTIMATE.start_upsweep_~a#1.base|))) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~a~0#1.offset| 0) (= |#NULL.base| 0))' at error location [2022-12-14 07:12:56,868 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 07:12:56,868 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 07:12:56,868 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 14, 14] total 43 [2022-12-14 07:12:56,868 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [239211575] [2022-12-14 07:12:56,868 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 07:12:56,868 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-12-14 07:12:56,868 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 07:12:56,869 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-12-14 07:12:56,869 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=412, Invalid=3878, Unknown=0, NotChecked=0, Total=4290 [2022-12-14 07:12:56,869 INFO L87 Difference]: Start difference. First operand 255 states and 290 transitions. Second operand has 44 states, 43 states have (on average 2.6511627906976742) internal successors, (114), 44 states have internal predecessors, (114), 7 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) [2022-12-14 07:13:01,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:13:01,956 INFO L93 Difference]: Finished difference Result 643 states and 745 transitions. [2022-12-14 07:13:01,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2022-12-14 07:13:01,956 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 43 states have (on average 2.6511627906976742) internal successors, (114), 44 states have internal predecessors, (114), 7 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) Word has length 72 [2022-12-14 07:13:01,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:13:01,957 INFO L225 Difference]: With dead ends: 643 [2022-12-14 07:13:01,957 INFO L226 Difference]: Without dead ends: 643 [2022-12-14 07:13:01,958 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 293 GetRequests, 167 SyntacticMatches, 0 SemanticMatches, 126 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4070 ImplicationChecksByTransitivity, 8.9s TimeCoverageRelationStatistics Valid=2945, Invalid=13311, Unknown=0, NotChecked=0, Total=16256 [2022-12-14 07:13:01,958 INFO L413 NwaCegarLoop]: 45 mSDtfsCounter, 698 mSDsluCounter, 607 mSDsCounter, 0 mSdLazyCounter, 2158 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 698 SdHoareTripleChecker+Valid, 652 SdHoareTripleChecker+Invalid, 2176 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 2158 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-12-14 07:13:01,958 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [698 Valid, 652 Invalid, 2176 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 2158 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-12-14 07:13:01,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 643 states. [2022-12-14 07:13:01,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 643 to 284. [2022-12-14 07:13:01,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 284 states, 271 states have (on average 1.169741697416974) internal successors, (317), 274 states have internal predecessors, (317), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-12-14 07:13:01,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 284 states to 284 states and 331 transitions. [2022-12-14 07:13:01,963 INFO L78 Accepts]: Start accepts. Automaton has 284 states and 331 transitions. Word has length 72 [2022-12-14 07:13:01,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:13:01,964 INFO L495 AbstractCegarLoop]: Abstraction has 284 states and 331 transitions. [2022-12-14 07:13:01,964 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 43 states have (on average 2.6511627906976742) internal successors, (114), 44 states have internal predecessors, (114), 7 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) [2022-12-14 07:13:01,964 INFO L276 IsEmpty]: Start isEmpty. Operand 284 states and 331 transitions. [2022-12-14 07:13:01,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-12-14 07:13:01,964 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:13:01,964 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 7, 7, 6, 6, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 07:13:01,969 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68d1f820-b3bd-44ff-981c-6d5644e6ec24/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Ended with exit code 0 [2022-12-14 07:13:02,165 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68d1f820-b3bd-44ff-981c-6d5644e6ec24/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2022-12-14 07:13:02,166 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2022-12-14 07:13:02,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:13:02,167 INFO L85 PathProgramCache]: Analyzing trace with hash -951170581, now seen corresponding path program 3 times [2022-12-14 07:13:02,167 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 07:13:02,167 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [576256998] [2022-12-14 07:13:02,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:13:02,168 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 07:13:02,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:13:02,519 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 78 proven. 94 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-12-14 07:13:02,520 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 07:13:02,520 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [576256998] [2022-12-14 07:13:02,520 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [576256998] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 07:13:02,520 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1078785692] [2022-12-14 07:13:02,520 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 07:13:02,520 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 07:13:02,520 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68d1f820-b3bd-44ff-981c-6d5644e6ec24/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 07:13:02,521 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68d1f820-b3bd-44ff-981c-6d5644e6ec24/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 07:13:02,522 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68d1f820-b3bd-44ff-981c-6d5644e6ec24/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2022-12-14 07:13:02,622 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 07:13:02,622 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 07:13:02,623 INFO L263 TraceCheckSpWp]: Trace formula consists of 368 conjuncts, 19 conjunts are in the unsatisfiable core [2022-12-14 07:13:02,625 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 07:13:02,812 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 66 proven. 96 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-12-14 07:13:02,812 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 07:13:02,978 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 42 proven. 120 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-12-14 07:13:02,978 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1078785692] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 07:13:02,978 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1372401468] [2022-12-14 07:13:02,979 INFO L159 IcfgInterpreter]: Started Sifa with 23 locations of interest [2022-12-14 07:13:02,979 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 07:13:02,980 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 07:13:02,980 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 07:13:02,980 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 07:13:03,176 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 10 treesize of output 9 [2022-12-14 07:13:03,181 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-12-14 07:13:03,214 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 6 [2022-12-14 07:13:03,283 INFO L321 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2022-12-14 07:13:03,284 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 127 treesize of output 127 [2022-12-14 07:13:03,307 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-12-14 07:13:03,307 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 128 treesize of output 130 [2022-12-14 07:13:03,379 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 6 treesize of output 4 [2022-12-14 07:13:03,391 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-12-14 07:13:03,464 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 6 treesize of output 4 [2022-12-14 07:13:03,472 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-12-14 07:13:03,512 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 20 [2022-12-14 07:13:03,588 INFO L321 Elim1Store]: treesize reduction 84, result has 9.7 percent of original size [2022-12-14 07:13:03,588 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 259 treesize of output 256 [2022-12-14 07:13:03,646 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:13:03,656 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 07:13:03,656 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 07:13:03,678 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:13:03,690 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 07:13:03,690 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 25 treesize of output 25 [2022-12-14 07:13:03,919 INFO L321 Elim1Store]: treesize reduction 76, result has 31.5 percent of original size [2022-12-14 07:13:03,919 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 282 treesize of output 303 [2022-12-14 07:13:04,063 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-12-14 07:13:04,082 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:13:04,083 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:13:04,085 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:13:04,086 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:13:04,119 INFO L321 Elim1Store]: treesize reduction 28, result has 60.6 percent of original size [2022-12-14 07:13:04,119 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 47 treesize of output 70 [2022-12-14 07:13:04,160 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-12-14 07:13:04,178 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:13:04,180 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:13:04,221 INFO L321 Elim1Store]: treesize reduction 28, result has 60.6 percent of original size [2022-12-14 07:13:04,221 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 2 case distinctions, treesize of input 49 treesize of output 82 [2022-12-14 07:13:04,290 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:13:04,291 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 0 case distinctions, treesize of input 36 treesize of output 28 [2022-12-14 07:13:04,390 INFO L197 IcfgInterpreter]: Interpreting procedure #Ultimate.meminit with input of size 70 for LOIs [2022-12-14 07:13:04,415 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 8 for LOIs [2022-12-14 07:13:04,416 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 07:13:08,605 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '34858#(and (<= 0 |ULTIMATE.start_upsweep_#in~a#1.offset|) (<= |ULTIMATE.start_main_~n~0#1| 2147483647) (<= 0 |ULTIMATE.start_upsweep_~a#1.offset|) (<= 1 |ULTIMATE.start_upsweep_#in~n#1|) (<= 0 |ULTIMATE.start_main_~a~0#1.offset|) (<= 0 |ULTIMATE.start_is_pow2_#res#1|) (= |ULTIMATE.start_upsweep_~space~0#1| 1) (<= |ULTIMATE.start_upsweep_#in~a#1.offset| 0) (= |ULTIMATE.start_main_#t~malloc16#1.offset| 0) (<= 0 (+ |ULTIMATE.start_is_pow2_#in~x#1| 2147483648)) (= (select (select |#memory_int| |ULTIMATE.start_upsweep_~a#1.base|) (+ (* 4 |ULTIMATE.start_upsweep_~left~0#1|) |ULTIMATE.start_upsweep_~a#1.offset|)) |ULTIMATE.start_upsweep_#t~mem5#1|) (= |ULTIMATE.start_upsweep_~right~0#1| (+ |ULTIMATE.start_upsweep_~space~0#1| |ULTIMATE.start_upsweep_~left~0#1|)) (<= (+ (* 4 |ULTIMATE.start_upsweep_~left~0#1|) |ULTIMATE.start_upsweep_~a#1.offset| 4) (select |#length| |ULTIMATE.start_upsweep_~a#1.base|)) (<= |ULTIMATE.start_upsweep_~a#1.offset| 0) (<= |ULTIMATE.start_is_pow2_#res#1| 1) (<= |ULTIMATE.start_upsweep_#in~n#1| 2147483647) (<= 0 (+ (* 4 |ULTIMATE.start_upsweep_~left~0#1|) |ULTIMATE.start_upsweep_~a#1.offset|)) (<= 1 |ULTIMATE.start_main_~n~0#1|) (<= 1 |ULTIMATE.start_main_~i~1#1|) (<= |ULTIMATE.start_upsweep_~n#1| 2147483647) (= (select |#valid| |ULTIMATE.start_upsweep_~a#1.base|) 1) (< |ULTIMATE.start_upsweep_~left~0#1| |ULTIMATE.start_upsweep_~n#1|) (<= 0 |ULTIMATE.start_main_~a0~0#1.offset|) (= |#NULL.offset| 0) (<= |ULTIMATE.start_is_pow2_#in~x#1| 2147483647) (= |ULTIMATE.start_main_#t~malloc15#1.offset| 0) (<= |ULTIMATE.start_main_~a0~0#1.offset| 0) (not (<= (+ (* |ULTIMATE.start_upsweep_~right~0#1| 4) |ULTIMATE.start_upsweep_~a#1.offset| 4) (select |#length| |ULTIMATE.start_upsweep_~a#1.base|))) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~a~0#1.offset| 0) (= |#NULL.base| 0))' at error location [2022-12-14 07:13:08,605 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 07:13:08,605 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 07:13:08,605 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 17, 17] total 33 [2022-12-14 07:13:08,605 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1031967153] [2022-12-14 07:13:08,605 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 07:13:08,606 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-12-14 07:13:08,606 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 07:13:08,606 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-12-14 07:13:08,606 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=284, Invalid=2686, Unknown=0, NotChecked=0, Total=2970 [2022-12-14 07:13:08,607 INFO L87 Difference]: Start difference. First operand 284 states and 331 transitions. Second operand has 33 states, 33 states have (on average 3.303030303030303) internal successors, (109), 33 states have internal predecessors, (109), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-12-14 07:13:09,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:13:09,373 INFO L93 Difference]: Finished difference Result 616 states and 711 transitions. [2022-12-14 07:13:09,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-12-14 07:13:09,374 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 3.303030303030303) internal successors, (109), 33 states have internal predecessors, (109), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 73 [2022-12-14 07:13:09,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:13:09,375 INFO L225 Difference]: With dead ends: 616 [2022-12-14 07:13:09,375 INFO L226 Difference]: Without dead ends: 598 [2022-12-14 07:13:09,375 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 257 GetRequests, 176 SyntacticMatches, 9 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1781 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=600, Invalid=4802, Unknown=0, NotChecked=0, Total=5402 [2022-12-14 07:13:09,375 INFO L413 NwaCegarLoop]: 51 mSDtfsCounter, 500 mSDsluCounter, 538 mSDsCounter, 0 mSdLazyCounter, 630 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 500 SdHoareTripleChecker+Valid, 589 SdHoareTripleChecker+Invalid, 664 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 630 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-12-14 07:13:09,376 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [500 Valid, 589 Invalid, 664 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 630 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-12-14 07:13:09,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 598 states. [2022-12-14 07:13:09,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 598 to 348. [2022-12-14 07:13:09,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 348 states, 335 states have (on average 1.182089552238806) internal successors, (396), 338 states have internal predecessors, (396), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-12-14 07:13:09,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 348 states to 348 states and 410 transitions. [2022-12-14 07:13:09,380 INFO L78 Accepts]: Start accepts. Automaton has 348 states and 410 transitions. Word has length 73 [2022-12-14 07:13:09,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:13:09,380 INFO L495 AbstractCegarLoop]: Abstraction has 348 states and 410 transitions. [2022-12-14 07:13:09,380 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 3.303030303030303) internal successors, (109), 33 states have internal predecessors, (109), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-12-14 07:13:09,380 INFO L276 IsEmpty]: Start isEmpty. Operand 348 states and 410 transitions. [2022-12-14 07:13:09,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2022-12-14 07:13:09,381 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:13:09,381 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 7, 7, 6, 6, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 07:13:09,385 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68d1f820-b3bd-44ff-981c-6d5644e6ec24/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Ended with exit code 0 [2022-12-14 07:13:09,581 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,46 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68d1f820-b3bd-44ff-981c-6d5644e6ec24/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 07:13:09,582 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2022-12-14 07:13:09,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:13:09,583 INFO L85 PathProgramCache]: Analyzing trace with hash 226536037, now seen corresponding path program 11 times [2022-12-14 07:13:09,584 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 07:13:09,584 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1055625907] [2022-12-14 07:13:09,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:13:09,584 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 07:13:09,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:13:09,874 INFO L134 CoverageAnalysis]: Checked inductivity of 188 backedges. 12 proven. 141 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2022-12-14 07:13:09,874 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 07:13:09,874 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1055625907] [2022-12-14 07:13:09,874 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1055625907] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 07:13:09,874 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1495222318] [2022-12-14 07:13:09,874 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 07:13:09,874 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 07:13:09,874 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68d1f820-b3bd-44ff-981c-6d5644e6ec24/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 07:13:09,875 INFO L229 MonitoredProcess]: Starting monitored process 47 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68d1f820-b3bd-44ff-981c-6d5644e6ec24/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 07:13:09,876 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68d1f820-b3bd-44ff-981c-6d5644e6ec24/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2022-12-14 07:13:10,757 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-12-14 07:13:10,757 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 07:13:10,759 INFO L263 TraceCheckSpWp]: Trace formula consists of 319 conjuncts, 47 conjunts are in the unsatisfiable core [2022-12-14 07:13:10,760 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 07:13:15,979 INFO L134 CoverageAnalysis]: Checked inductivity of 188 backedges. 35 proven. 63 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2022-12-14 07:13:15,979 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 07:13:16,650 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 29 treesize of output 25 [2022-12-14 07:13:17,784 INFO L134 CoverageAnalysis]: Checked inductivity of 188 backedges. 5 proven. 93 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2022-12-14 07:13:17,785 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1495222318] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 07:13:17,785 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [699267773] [2022-12-14 07:13:17,785 INFO L159 IcfgInterpreter]: Started Sifa with 23 locations of interest [2022-12-14 07:13:17,785 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 07:13:17,785 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 07:13:17,786 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 07:13:17,786 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 07:13:17,954 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-12-14 07:13:17,958 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 10 treesize of output 9 [2022-12-14 07:13:17,985 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 6 [2022-12-14 07:13:18,054 INFO L321 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2022-12-14 07:13:18,055 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 127 treesize of output 127 [2022-12-14 07:13:18,076 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-12-14 07:13:18,076 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 128 treesize of output 130 [2022-12-14 07:13:18,158 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 6 treesize of output 4 [2022-12-14 07:13:18,168 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-12-14 07:13:18,249 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 6 treesize of output 4 [2022-12-14 07:13:18,259 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-12-14 07:13:18,337 INFO L321 Elim1Store]: treesize reduction 28, result has 15.2 percent of original size [2022-12-14 07:13:18,338 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 200 treesize of output 196 [2022-12-14 07:13:18,386 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:13:18,396 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 07:13:18,397 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 25 treesize of output 25 [2022-12-14 07:13:18,414 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:13:18,423 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 07:13:18,423 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 25 treesize of output 25 [2022-12-14 07:13:18,499 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:13:18,500 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 0 case distinctions, treesize of input 36 treesize of output 28 [2022-12-14 07:13:18,554 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:13:18,554 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 0 case distinctions, treesize of input 36 treesize of output 28 [2022-12-14 07:13:18,610 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:13:18,611 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 0 case distinctions, treesize of input 36 treesize of output 28 [2022-12-14 07:13:18,759 INFO L197 IcfgInterpreter]: Interpreting procedure #Ultimate.meminit with input of size 70 for LOIs [2022-12-14 07:13:18,780 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 8 for LOIs [2022-12-14 07:13:18,781 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 07:13:24,110 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '36382#(and (<= 0 |ULTIMATE.start_upsweep_#in~a#1.offset|) (<= |ULTIMATE.start_main_~n~0#1| 2147483647) (<= 0 |ULTIMATE.start_upsweep_~a#1.offset|) (<= 1 |ULTIMATE.start_upsweep_#in~n#1|) (<= 0 |ULTIMATE.start_main_~a~0#1.offset|) (<= 0 |ULTIMATE.start_is_pow2_#res#1|) (<= |ULTIMATE.start_upsweep_#in~a#1.offset| 0) (= |ULTIMATE.start_main_#t~malloc16#1.offset| 0) (<= 0 (+ |ULTIMATE.start_is_pow2_#in~x#1| 2147483648)) (= (select (select |#memory_int| |ULTIMATE.start_upsweep_~a#1.base|) (+ (* 4 |ULTIMATE.start_upsweep_~left~0#1|) |ULTIMATE.start_upsweep_~a#1.offset|)) |ULTIMATE.start_upsweep_#t~mem5#1|) (= |ULTIMATE.start_upsweep_~right~0#1| (+ |ULTIMATE.start_upsweep_~space~0#1| |ULTIMATE.start_upsweep_~left~0#1|)) (<= (+ (* 4 |ULTIMATE.start_upsweep_~left~0#1|) |ULTIMATE.start_upsweep_~a#1.offset| 4) (select |#length| |ULTIMATE.start_upsweep_~a#1.base|)) (<= |ULTIMATE.start_upsweep_~a#1.offset| 0) (<= |ULTIMATE.start_is_pow2_#res#1| 1) (<= |ULTIMATE.start_upsweep_#in~n#1| 2147483647) (<= 0 (+ (* 4 |ULTIMATE.start_upsweep_~left~0#1|) |ULTIMATE.start_upsweep_~a#1.offset|)) (<= 1 |ULTIMATE.start_main_~n~0#1|) (<= 1 |ULTIMATE.start_main_~i~1#1|) (<= |ULTIMATE.start_upsweep_~n#1| 2147483647) (= (select |#valid| |ULTIMATE.start_upsweep_~a#1.base|) 1) (< |ULTIMATE.start_upsweep_~left~0#1| |ULTIMATE.start_upsweep_~n#1|) (<= 0 |ULTIMATE.start_main_~a0~0#1.offset|) (= |#NULL.offset| 0) (<= |ULTIMATE.start_is_pow2_#in~x#1| 2147483647) (= |ULTIMATE.start_main_#t~malloc15#1.offset| 0) (<= |ULTIMATE.start_main_~a0~0#1.offset| 0) (not (<= (+ (* |ULTIMATE.start_upsweep_~right~0#1| 4) |ULTIMATE.start_upsweep_~a#1.offset| 4) (select |#length| |ULTIMATE.start_upsweep_~a#1.base|))) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~a~0#1.offset| 0) (= |#NULL.base| 0))' at error location [2022-12-14 07:13:24,111 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 07:13:24,111 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 07:13:24,111 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18, 18] total 50 [2022-12-14 07:13:24,111 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1216057545] [2022-12-14 07:13:24,111 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 07:13:24,111 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2022-12-14 07:13:24,111 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 07:13:24,111 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2022-12-14 07:13:24,112 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=397, Invalid=4715, Unknown=0, NotChecked=0, Total=5112 [2022-12-14 07:13:24,112 INFO L87 Difference]: Start difference. First operand 348 states and 410 transitions. Second operand has 50 states, 50 states have (on average 2.52) internal successors, (126), 50 states have internal predecessors, (126), 7 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 7 states have call predecessors, (10), 7 states have call successors, (10) [2022-12-14 07:13:58,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:13:58,159 INFO L93 Difference]: Finished difference Result 880 states and 1011 transitions. [2022-12-14 07:13:58,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 127 states. [2022-12-14 07:13:58,159 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 2.52) internal successors, (126), 50 states have internal predecessors, (126), 7 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 7 states have call predecessors, (10), 7 states have call successors, (10) Word has length 76 [2022-12-14 07:13:58,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:13:58,161 INFO L225 Difference]: With dead ends: 880 [2022-12-14 07:13:58,161 INFO L226 Difference]: Without dead ends: 880 [2022-12-14 07:13:58,162 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 365 GetRequests, 174 SyntacticMatches, 0 SemanticMatches, 191 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12327 ImplicationChecksByTransitivity, 40.6s TimeCoverageRelationStatistics Valid=5076, Invalid=31979, Unknown=1, NotChecked=0, Total=37056 [2022-12-14 07:13:58,163 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 2615 mSDsluCounter, 505 mSDsCounter, 0 mSdLazyCounter, 1844 mSolverCounterSat, 143 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2615 SdHoareTripleChecker+Valid, 529 SdHoareTripleChecker+Invalid, 1987 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 143 IncrementalHoareTripleChecker+Valid, 1844 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2022-12-14 07:13:58,163 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2615 Valid, 529 Invalid, 1987 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [143 Valid, 1844 Invalid, 0 Unknown, 0 Unchecked, 3.2s Time] [2022-12-14 07:13:58,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 880 states. [2022-12-14 07:13:58,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 880 to 399. [2022-12-14 07:13:58,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 399 states, 386 states have (on average 1.194300518134715) internal successors, (461), 389 states have internal predecessors, (461), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-12-14 07:13:58,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 399 states to 399 states and 475 transitions. [2022-12-14 07:13:58,168 INFO L78 Accepts]: Start accepts. Automaton has 399 states and 475 transitions. Word has length 76 [2022-12-14 07:13:58,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:13:58,168 INFO L495 AbstractCegarLoop]: Abstraction has 399 states and 475 transitions. [2022-12-14 07:13:58,168 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 2.52) internal successors, (126), 50 states have internal predecessors, (126), 7 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 7 states have call predecessors, (10), 7 states have call successors, (10) [2022-12-14 07:13:58,169 INFO L276 IsEmpty]: Start isEmpty. Operand 399 states and 475 transitions. [2022-12-14 07:13:58,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2022-12-14 07:13:58,169 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:13:58,169 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 9, 7, 7, 6, 6, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 07:13:58,174 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68d1f820-b3bd-44ff-981c-6d5644e6ec24/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Ended with exit code 0 [2022-12-14 07:13:58,370 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,47 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68d1f820-b3bd-44ff-981c-6d5644e6ec24/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 07:13:58,371 INFO L420 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2022-12-14 07:13:58,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:13:58,372 INFO L85 PathProgramCache]: Analyzing trace with hash -737836956, now seen corresponding path program 4 times [2022-12-14 07:13:58,372 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 07:13:58,372 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1231705036] [2022-12-14 07:13:58,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:13:58,373 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 07:13:58,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:13:58,759 INFO L134 CoverageAnalysis]: Checked inductivity of 202 backedges. 78 proven. 119 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-12-14 07:13:58,759 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 07:13:58,759 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1231705036] [2022-12-14 07:13:58,759 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1231705036] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 07:13:58,759 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [485165631] [2022-12-14 07:13:58,760 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-14 07:13:58,760 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 07:13:58,760 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68d1f820-b3bd-44ff-981c-6d5644e6ec24/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 07:13:58,760 INFO L229 MonitoredProcess]: Starting monitored process 48 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68d1f820-b3bd-44ff-981c-6d5644e6ec24/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 07:13:58,761 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68d1f820-b3bd-44ff-981c-6d5644e6ec24/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2022-12-14 07:13:58,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:13:58,900 INFO L263 TraceCheckSpWp]: Trace formula consists of 460 conjuncts, 21 conjunts are in the unsatisfiable core [2022-12-14 07:13:58,901 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 07:13:59,116 INFO L134 CoverageAnalysis]: Checked inductivity of 202 backedges. 71 proven. 122 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-12-14 07:13:59,116 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 07:13:59,308 INFO L134 CoverageAnalysis]: Checked inductivity of 202 backedges. 31 proven. 162 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-12-14 07:13:59,309 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [485165631] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 07:13:59,309 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [757189902] [2022-12-14 07:13:59,310 INFO L159 IcfgInterpreter]: Started Sifa with 23 locations of interest [2022-12-14 07:13:59,310 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 07:13:59,310 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 07:13:59,310 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 07:13:59,310 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 07:13:59,455 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 10 treesize of output 9 [2022-12-14 07:13:59,465 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-12-14 07:13:59,494 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 6 [2022-12-14 07:13:59,568 INFO L321 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2022-12-14 07:13:59,568 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 127 treesize of output 127 [2022-12-14 07:13:59,588 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-12-14 07:13:59,588 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 128 treesize of output 130 [2022-12-14 07:13:59,660 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 6 treesize of output 4 [2022-12-14 07:13:59,672 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-12-14 07:13:59,738 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 6 treesize of output 4 [2022-12-14 07:13:59,745 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-12-14 07:13:59,828 INFO L321 Elim1Store]: treesize reduction 38, result has 11.6 percent of original size [2022-12-14 07:13:59,828 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 210 treesize of output 206 [2022-12-14 07:13:59,882 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:13:59,890 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 07:13:59,891 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 25 treesize of output 25 [2022-12-14 07:13:59,920 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:13:59,932 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 07:13:59,932 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 25 treesize of output 25 [2022-12-14 07:13:59,953 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:13:59,967 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 07:13:59,967 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 25 treesize of output 25 [2022-12-14 07:14:00,027 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:14:00,028 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 0 case distinctions, treesize of input 36 treesize of output 28 [2022-12-14 07:14:00,068 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:14:00,069 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 0 case distinctions, treesize of input 36 treesize of output 28 [2022-12-14 07:14:00,174 INFO L197 IcfgInterpreter]: Interpreting procedure #Ultimate.meminit with input of size 70 for LOIs [2022-12-14 07:14:00,192 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 8 for LOIs [2022-12-14 07:14:00,192 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 07:14:04,010 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '38412#(and (<= 0 |ULTIMATE.start_upsweep_#in~a#1.offset|) (<= |ULTIMATE.start_main_~n~0#1| 2147483647) (<= 0 |ULTIMATE.start_upsweep_~a#1.offset|) (<= 1 |ULTIMATE.start_upsweep_#in~n#1|) (<= 0 |ULTIMATE.start_main_~a~0#1.offset|) (<= 0 |ULTIMATE.start_is_pow2_#res#1|) (= |ULTIMATE.start_upsweep_~space~0#1| 1) (<= |ULTIMATE.start_upsweep_#in~a#1.offset| 0) (= |ULTIMATE.start_main_#t~malloc16#1.offset| 0) (<= 0 (+ |ULTIMATE.start_is_pow2_#in~x#1| 2147483648)) (= (select (select |#memory_int| |ULTIMATE.start_upsweep_~a#1.base|) (+ (* 4 |ULTIMATE.start_upsweep_~left~0#1|) |ULTIMATE.start_upsweep_~a#1.offset|)) |ULTIMATE.start_upsweep_#t~mem5#1|) (= |ULTIMATE.start_upsweep_~right~0#1| (+ |ULTIMATE.start_upsweep_~space~0#1| |ULTIMATE.start_upsweep_~left~0#1|)) (<= (+ (* 4 |ULTIMATE.start_upsweep_~left~0#1|) |ULTIMATE.start_upsweep_~a#1.offset| 4) (select |#length| |ULTIMATE.start_upsweep_~a#1.base|)) (<= |ULTIMATE.start_upsweep_~a#1.offset| 0) (<= |ULTIMATE.start_is_pow2_#res#1| 1) (<= |ULTIMATE.start_upsweep_#in~n#1| 2147483647) (<= 0 (+ (* 4 |ULTIMATE.start_upsweep_~left~0#1|) |ULTIMATE.start_upsweep_~a#1.offset|)) (<= 1 |ULTIMATE.start_main_~n~0#1|) (<= 1 |ULTIMATE.start_main_~i~1#1|) (<= |ULTIMATE.start_upsweep_~n#1| 2147483647) (= (select |#valid| |ULTIMATE.start_upsweep_~a#1.base|) 1) (< |ULTIMATE.start_upsweep_~left~0#1| |ULTIMATE.start_upsweep_~n#1|) (<= 0 |ULTIMATE.start_main_~a0~0#1.offset|) (= |#NULL.offset| 0) (<= |ULTIMATE.start_is_pow2_#in~x#1| 2147483647) (= |ULTIMATE.start_main_#t~malloc15#1.offset| 0) (<= |ULTIMATE.start_main_~a0~0#1.offset| 0) (not (<= (+ (* |ULTIMATE.start_upsweep_~right~0#1| 4) |ULTIMATE.start_upsweep_~a#1.offset| 4) (select |#length| |ULTIMATE.start_upsweep_~a#1.base|))) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~a~0#1.offset| 0) (= |#NULL.base| 0))' at error location [2022-12-14 07:14:04,010 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 07:14:04,010 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 07:14:04,010 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 19, 19] total 37 [2022-12-14 07:14:04,011 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [290453167] [2022-12-14 07:14:04,011 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 07:14:04,011 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-12-14 07:14:04,011 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 07:14:04,011 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-12-14 07:14:04,011 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=333, Invalid=3089, Unknown=0, NotChecked=0, Total=3422 [2022-12-14 07:14:04,011 INFO L87 Difference]: Start difference. First operand 399 states and 475 transitions. Second operand has 37 states, 37 states have (on average 3.3513513513513513) internal successors, (124), 37 states have internal predecessors, (124), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-12-14 07:14:05,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:14:05,305 INFO L93 Difference]: Finished difference Result 894 states and 1044 transitions. [2022-12-14 07:14:05,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-12-14 07:14:05,305 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 3.3513513513513513) internal successors, (124), 37 states have internal predecessors, (124), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 76 [2022-12-14 07:14:05,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:14:05,307 INFO L225 Difference]: With dead ends: 894 [2022-12-14 07:14:05,307 INFO L226 Difference]: Without dead ends: 872 [2022-12-14 07:14:05,307 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 279 GetRequests, 182 SyntacticMatches, 9 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2590 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=970, Invalid=7040, Unknown=0, NotChecked=0, Total=8010 [2022-12-14 07:14:05,307 INFO L413 NwaCegarLoop]: 65 mSDtfsCounter, 751 mSDsluCounter, 736 mSDsCounter, 0 mSdLazyCounter, 858 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 751 SdHoareTripleChecker+Valid, 801 SdHoareTripleChecker+Invalid, 918 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 858 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-12-14 07:14:05,307 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [751 Valid, 801 Invalid, 918 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 858 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-12-14 07:14:05,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 872 states. [2022-12-14 07:14:05,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 872 to 504. [2022-12-14 07:14:05,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 504 states, 491 states have (on average 1.2077393075356415) internal successors, (593), 494 states have internal predecessors, (593), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-12-14 07:14:05,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 504 states to 504 states and 607 transitions. [2022-12-14 07:14:05,313 INFO L78 Accepts]: Start accepts. Automaton has 504 states and 607 transitions. Word has length 76 [2022-12-14 07:14:05,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:14:05,313 INFO L495 AbstractCegarLoop]: Abstraction has 504 states and 607 transitions. [2022-12-14 07:14:05,313 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 3.3513513513513513) internal successors, (124), 37 states have internal predecessors, (124), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-12-14 07:14:05,313 INFO L276 IsEmpty]: Start isEmpty. Operand 504 states and 607 transitions. [2022-12-14 07:14:05,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2022-12-14 07:14:05,314 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:14:05,314 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 7, 7, 6, 6, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 07:14:05,318 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68d1f820-b3bd-44ff-981c-6d5644e6ec24/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Ended with exit code 0 [2022-12-14 07:14:05,514 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,48 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68d1f820-b3bd-44ff-981c-6d5644e6ec24/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 07:14:05,515 INFO L420 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2022-12-14 07:14:05,515 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:14:05,515 INFO L85 PathProgramCache]: Analyzing trace with hash -1200279928, now seen corresponding path program 12 times [2022-12-14 07:14:05,515 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 07:14:05,515 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [82657182] [2022-12-14 07:14:05,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:14:05,515 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 07:14:05,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:14:05,917 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 57 proven. 97 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2022-12-14 07:14:05,918 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 07:14:05,918 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [82657182] [2022-12-14 07:14:05,918 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [82657182] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 07:14:05,918 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1772218244] [2022-12-14 07:14:05,918 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 07:14:05,918 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 07:14:05,918 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68d1f820-b3bd-44ff-981c-6d5644e6ec24/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 07:14:05,919 INFO L229 MonitoredProcess]: Starting monitored process 49 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68d1f820-b3bd-44ff-981c-6d5644e6ec24/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 07:14:05,920 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68d1f820-b3bd-44ff-981c-6d5644e6ec24/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2022-12-14 07:14:06,055 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 07:14:06,055 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 07:14:06,057 INFO L263 TraceCheckSpWp]: Trace formula consists of 380 conjuncts, 20 conjunts are in the unsatisfiable core [2022-12-14 07:14:06,058 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 07:14:06,681 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 18 proven. 87 refuted. 0 times theorem prover too weak. 93 trivial. 0 not checked. [2022-12-14 07:14:06,681 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 07:14:06,892 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 29 treesize of output 25 [2022-12-14 07:14:07,196 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 93 trivial. 0 not checked. [2022-12-14 07:14:07,196 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1772218244] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 07:14:07,196 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1290626416] [2022-12-14 07:14:07,197 INFO L159 IcfgInterpreter]: Started Sifa with 23 locations of interest [2022-12-14 07:14:07,197 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 07:14:07,197 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 07:14:07,198 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 07:14:07,198 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 07:14:07,345 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 10 treesize of output 9 [2022-12-14 07:14:07,350 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-12-14 07:14:07,385 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 6 [2022-12-14 07:14:07,456 INFO L321 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2022-12-14 07:14:07,456 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 127 treesize of output 127 [2022-12-14 07:14:07,479 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-12-14 07:14:07,479 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 128 treesize of output 130 [2022-12-14 07:14:07,570 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 6 treesize of output 4 [2022-12-14 07:14:07,579 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-12-14 07:14:07,651 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 6 treesize of output 4 [2022-12-14 07:14:07,662 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-12-14 07:14:07,739 INFO L321 Elim1Store]: treesize reduction 38, result has 11.6 percent of original size [2022-12-14 07:14:07,739 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 210 treesize of output 206 [2022-12-14 07:14:07,790 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:14:07,798 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 07:14:07,799 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 25 treesize of output 25 [2022-12-14 07:14:07,825 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:14:07,835 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 07:14:07,835 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 25 treesize of output 25 [2022-12-14 07:14:07,856 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:14:07,866 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 07:14:07,866 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 25 treesize of output 25 [2022-12-14 07:14:07,927 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:14:07,927 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 0 case distinctions, treesize of input 36 treesize of output 28 [2022-12-14 07:14:07,998 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:14:07,998 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 0 case distinctions, treesize of input 36 treesize of output 28 [2022-12-14 07:14:08,079 INFO L321 Elim1Store]: treesize reduction 29, result has 59.7 percent of original size [2022-12-14 07:14:08,079 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 36 treesize of output 56 [2022-12-14 07:14:08,185 INFO L197 IcfgInterpreter]: Interpreting procedure #Ultimate.meminit with input of size 70 for LOIs [2022-12-14 07:14:08,206 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 8 for LOIs [2022-12-14 07:14:08,207 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 07:14:12,416 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '40400#(and (<= 0 |ULTIMATE.start_upsweep_#in~a#1.offset|) (<= |ULTIMATE.start_main_~n~0#1| 2147483647) (<= 0 |ULTIMATE.start_upsweep_~a#1.offset|) (<= 1 |ULTIMATE.start_upsweep_#in~n#1|) (<= 0 |ULTIMATE.start_main_~a~0#1.offset|) (<= 0 |ULTIMATE.start_is_pow2_#res#1|) (<= |ULTIMATE.start_upsweep_#in~a#1.offset| 0) (= |ULTIMATE.start_main_#t~malloc16#1.offset| 0) (<= 0 (+ |ULTIMATE.start_is_pow2_#in~x#1| 2147483648)) (= (select (select |#memory_int| |ULTIMATE.start_upsweep_~a#1.base|) (+ (* 4 |ULTIMATE.start_upsweep_~left~0#1|) |ULTIMATE.start_upsweep_~a#1.offset|)) |ULTIMATE.start_upsweep_#t~mem5#1|) (= |ULTIMATE.start_upsweep_~right~0#1| (+ |ULTIMATE.start_upsweep_~space~0#1| |ULTIMATE.start_upsweep_~left~0#1|)) (<= (+ (* 4 |ULTIMATE.start_upsweep_~left~0#1|) |ULTIMATE.start_upsweep_~a#1.offset| 4) (select |#length| |ULTIMATE.start_upsweep_~a#1.base|)) (<= |ULTIMATE.start_upsweep_~a#1.offset| 0) (<= |ULTIMATE.start_is_pow2_#res#1| 1) (<= |ULTIMATE.start_upsweep_#in~n#1| 2147483647) (<= 0 (+ (* 4 |ULTIMATE.start_upsweep_~left~0#1|) |ULTIMATE.start_upsweep_~a#1.offset|)) (<= 1 |ULTIMATE.start_main_~n~0#1|) (<= 1 |ULTIMATE.start_main_~i~1#1|) (<= |ULTIMATE.start_upsweep_~n#1| 2147483647) (= (select |#valid| |ULTIMATE.start_upsweep_~a#1.base|) 1) (< |ULTIMATE.start_upsweep_~left~0#1| |ULTIMATE.start_upsweep_~n#1|) (<= 0 |ULTIMATE.start_main_~a0~0#1.offset|) (= |#NULL.offset| 0) (<= |ULTIMATE.start_is_pow2_#in~x#1| 2147483647) (= |ULTIMATE.start_main_#t~malloc15#1.offset| 0) (<= |ULTIMATE.start_main_~a0~0#1.offset| 0) (or (not (<= (+ (* |ULTIMATE.start_upsweep_~right~0#1| 4) |ULTIMATE.start_upsweep_~a#1.offset| 4) (select |#length| |ULTIMATE.start_upsweep_~a#1.base|))) (not (<= 0 (+ (* |ULTIMATE.start_upsweep_~right~0#1| 4) |ULTIMATE.start_upsweep_~a#1.offset|)))) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~a~0#1.offset| 0) (= |#NULL.base| 0))' at error location [2022-12-14 07:14:12,417 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 07:14:12,417 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 07:14:12,417 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 14, 14] total 43 [2022-12-14 07:14:12,417 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [741252455] [2022-12-14 07:14:12,417 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 07:14:12,417 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-12-14 07:14:12,417 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 07:14:12,418 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-12-14 07:14:12,418 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=375, Invalid=3915, Unknown=0, NotChecked=0, Total=4290 [2022-12-14 07:14:12,418 INFO L87 Difference]: Start difference. First operand 504 states and 607 transitions. Second operand has 44 states, 43 states have (on average 2.8372093023255816) internal successors, (122), 44 states have internal predecessors, (122), 3 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6)