./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 b5237d83 Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0dd9036d-146f-4358-9ac0-018e53d6ce12/bin/utaipan-g80aRyZoba/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0dd9036d-146f-4358-9ac0-018e53d6ce12/bin/utaipan-g80aRyZoba/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0dd9036d-146f-4358-9ac0-018e53d6ce12/bin/utaipan-g80aRyZoba/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0dd9036d-146f-4358-9ac0-018e53d6ce12/bin/utaipan-g80aRyZoba/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/verifythis/prefixsum_iter.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0dd9036d-146f-4358-9ac0-018e53d6ce12/bin/utaipan-g80aRyZoba/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0dd9036d-146f-4358-9ac0-018e53d6ce12/bin/utaipan-g80aRyZoba --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-b5237d8 [2022-11-22 01:25:12,789 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-22 01:25:12,791 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-22 01:25:12,813 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-22 01:25:12,819 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-22 01:25:12,822 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-22 01:25:12,825 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-22 01:25:12,829 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-22 01:25:12,832 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-22 01:25:12,837 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-22 01:25:12,838 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-22 01:25:12,839 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-22 01:25:12,840 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-22 01:25:12,841 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-22 01:25:12,842 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-22 01:25:12,843 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-22 01:25:12,844 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-22 01:25:12,845 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-22 01:25:12,846 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-22 01:25:12,856 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-22 01:25:12,859 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-22 01:25:12,862 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-22 01:25:12,864 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-22 01:25:12,868 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-22 01:25:12,878 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-22 01:25:12,879 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-22 01:25:12,879 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-22 01:25:12,882 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-22 01:25:12,882 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-22 01:25:12,883 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-22 01:25:12,884 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-22 01:25:12,885 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-22 01:25:12,887 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-22 01:25:12,889 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-22 01:25:12,890 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-22 01:25:12,890 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-22 01:25:12,891 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-22 01:25:12,891 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-22 01:25:12,892 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-22 01:25:12,893 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-22 01:25:12,894 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-22 01:25:12,896 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0dd9036d-146f-4358-9ac0-018e53d6ce12/bin/utaipan-g80aRyZoba/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2022-11-22 01:25:12,937 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-22 01:25:12,941 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-22 01:25:12,941 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-22 01:25:12,942 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-22 01:25:12,943 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-22 01:25:12,943 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-22 01:25:12,943 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-22 01:25:12,944 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-22 01:25:12,944 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-22 01:25:12,944 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-22 01:25:12,945 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-22 01:25:12,946 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-22 01:25:12,946 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-22 01:25:12,946 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-22 01:25:12,947 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-22 01:25:12,947 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-22 01:25:12,947 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-22 01:25:12,947 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-22 01:25:12,948 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-22 01:25:12,948 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-22 01:25:12,949 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-22 01:25:12,949 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-22 01:25:12,949 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-22 01:25:12,950 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-22 01:25:12,950 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-22 01:25:12,951 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-22 01:25:12,951 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-11-22 01:25:12,951 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-11-22 01:25:12,952 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-11-22 01:25:12,952 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-22 01:25:12,952 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-22 01:25:12,953 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-22 01:25:12,953 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-22 01:25:12,953 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-22 01:25:12,953 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-22 01:25:12,954 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-22 01:25:12,954 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-22 01:25:12,954 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-22 01:25:12,955 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-22 01:25:12,971 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-22 01:25:12,972 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-22 01:25:12,972 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-22 01:25:12,972 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_0dd9036d-146f-4358-9ac0-018e53d6ce12/bin/utaipan-g80aRyZoba/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0dd9036d-146f-4358-9ac0-018e53d6ce12/bin/utaipan-g80aRyZoba Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4cd641fa41c29ed0240eed782d3555502472fe8bb63d504547076d8eeefa2c0d [2022-11-22 01:25:13,291 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-22 01:25:13,328 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-22 01:25:13,330 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-22 01:25:13,332 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-22 01:25:13,332 INFO L275 PluginConnector]: CDTParser initialized [2022-11-22 01:25:13,333 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0dd9036d-146f-4358-9ac0-018e53d6ce12/bin/utaipan-g80aRyZoba/../../sv-benchmarks/c/verifythis/prefixsum_iter.c [2022-11-22 01:25:16,491 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-22 01:25:16,690 INFO L351 CDTParser]: Found 1 translation units. [2022-11-22 01:25:16,691 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0dd9036d-146f-4358-9ac0-018e53d6ce12/sv-benchmarks/c/verifythis/prefixsum_iter.c [2022-11-22 01:25:16,697 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0dd9036d-146f-4358-9ac0-018e53d6ce12/bin/utaipan-g80aRyZoba/data/8600ec9fc/10fb34f3b8574c4fb52f6cb3aa928a13/FLAGa12004e46 [2022-11-22 01:25:16,712 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0dd9036d-146f-4358-9ac0-018e53d6ce12/bin/utaipan-g80aRyZoba/data/8600ec9fc/10fb34f3b8574c4fb52f6cb3aa928a13 [2022-11-22 01:25:16,715 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-22 01:25:16,716 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-22 01:25:16,718 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-22 01:25:16,718 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-22 01:25:16,722 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-22 01:25:16,723 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 01:25:16" (1/1) ... [2022-11-22 01:25:16,724 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2890824 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:25:16, skipping insertion in model container [2022-11-22 01:25:16,724 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 01:25:16" (1/1) ... [2022-11-22 01:25:16,732 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-22 01:25:16,749 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-22 01:25:16,944 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_0dd9036d-146f-4358-9ac0-018e53d6ce12/sv-benchmarks/c/verifythis/prefixsum_iter.c[526,539] [2022-11-22 01:25:16,983 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-22 01:25:16,995 INFO L203 MainTranslator]: Completed pre-run [2022-11-22 01:25:17,005 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_0dd9036d-146f-4358-9ac0-018e53d6ce12/sv-benchmarks/c/verifythis/prefixsum_iter.c[526,539] [2022-11-22 01:25:17,025 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-22 01:25:17,039 INFO L208 MainTranslator]: Completed translation [2022-11-22 01:25:17,040 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:25:17 WrapperNode [2022-11-22 01:25:17,040 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-22 01:25:17,041 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-22 01:25:17,041 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-22 01:25:17,042 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-22 01:25:17,049 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:25:17" (1/1) ... [2022-11-22 01:25:17,061 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:25:17" (1/1) ... [2022-11-22 01:25:17,089 INFO L138 Inliner]: procedures = 22, calls = 33, calls flagged for inlining = 7, calls inlined = 7, statements flattened = 131 [2022-11-22 01:25:17,090 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-22 01:25:17,090 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-22 01:25:17,091 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-22 01:25:17,091 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-22 01:25:17,101 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:25:17" (1/1) ... [2022-11-22 01:25:17,101 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:25:17" (1/1) ... [2022-11-22 01:25:17,104 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:25:17" (1/1) ... [2022-11-22 01:25:17,105 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:25:17" (1/1) ... [2022-11-22 01:25:17,113 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:25:17" (1/1) ... [2022-11-22 01:25:17,118 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:25:17" (1/1) ... [2022-11-22 01:25:17,120 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:25:17" (1/1) ... [2022-11-22 01:25:17,121 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:25:17" (1/1) ... [2022-11-22 01:25:17,124 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-22 01:25:17,125 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-22 01:25:17,125 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-22 01:25:17,125 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-22 01:25:17,126 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:25:17" (1/1) ... [2022-11-22 01:25:17,133 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-22 01:25:17,146 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0dd9036d-146f-4358-9ac0-018e53d6ce12/bin/utaipan-g80aRyZoba/z3 [2022-11-22 01:25:17,159 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0dd9036d-146f-4358-9ac0-018e53d6ce12/bin/utaipan-g80aRyZoba/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-22 01:25:17,185 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0dd9036d-146f-4358-9ac0-018e53d6ce12/bin/utaipan-g80aRyZoba/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-22 01:25:17,211 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-22 01:25:17,212 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-11-22 01:25:17,212 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-11-22 01:25:17,213 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-22 01:25:17,213 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-22 01:25:17,213 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-22 01:25:17,213 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-22 01:25:17,213 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-22 01:25:17,214 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-22 01:25:17,214 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.meminit [2022-11-22 01:25:17,214 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.meminit [2022-11-22 01:25:17,214 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-22 01:25:17,340 INFO L235 CfgBuilder]: Building ICFG [2022-11-22 01:25:17,342 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-22 01:25:17,786 INFO L276 CfgBuilder]: Performing block encoding [2022-11-22 01:25:17,929 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-22 01:25:17,937 INFO L300 CfgBuilder]: Removed 7 assume(true) statements. [2022-11-22 01:25:17,940 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 01:25:17 BoogieIcfgContainer [2022-11-22 01:25:17,940 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-22 01:25:17,943 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-22 01:25:17,943 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-22 01:25:17,951 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-22 01:25:17,951 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.11 01:25:16" (1/3) ... [2022-11-22 01:25:17,952 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@41217ece and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 01:25:17, skipping insertion in model container [2022-11-22 01:25:17,953 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:25:17" (2/3) ... [2022-11-22 01:25:17,953 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@41217ece and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 01:25:17, skipping insertion in model container [2022-11-22 01:25:17,954 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 01:25:17" (3/3) ... [2022-11-22 01:25:17,956 INFO L112 eAbstractionObserver]: Analyzing ICFG prefixsum_iter.c [2022-11-22 01:25:17,976 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-22 01:25:17,977 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 34 error locations. [2022-11-22 01:25:18,041 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-22 01:25:18,047 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;@4bcdbd04, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-22 01:25:18,047 INFO L358 AbstractCegarLoop]: Starting to check reachability of 34 error locations. [2022-11-22 01:25:18,052 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) [2022-11-22 01:25:18,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-11-22 01:25:18,059 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:25:18,060 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 01:25:18,061 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)] === [2022-11-22 01:25:18,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:25:18,066 INFO L85 PathProgramCache]: Analyzing trace with hash -400663964, now seen corresponding path program 1 times [2022-11-22 01:25:18,075 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:25:18,076 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [872161990] [2022-11-22 01:25:18,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:25:18,076 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:25:18,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:25:18,628 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-22 01:25:18,628 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:25:18,629 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [872161990] [2022-11-22 01:25:18,629 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [872161990] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 01:25:18,630 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 01:25:18,630 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-22 01:25:18,631 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1234207622] [2022-11-22 01:25:18,632 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:25:18,637 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-22 01:25:18,637 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:25:18,665 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-22 01:25:18,666 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-22 01:25:18,668 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) [2022-11-22 01:25:18,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:25:18,847 INFO L93 Difference]: Finished difference Result 76 states and 84 transitions. [2022-11-22 01:25:18,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-22 01:25:18,851 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 [2022-11-22 01:25:18,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:25:18,860 INFO L225 Difference]: With dead ends: 76 [2022-11-22 01:25:18,861 INFO L226 Difference]: Without dead ends: 75 [2022-11-22 01:25:18,862 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-22 01:25:18,869 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 [2022-11-22 01:25:18,870 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] [2022-11-22 01:25:18,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2022-11-22 01:25:18,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2022-11-22 01:25:18,908 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) [2022-11-22 01:25:18,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 83 transitions. [2022-11-22 01:25:18,911 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 83 transitions. Word has length 20 [2022-11-22 01:25:18,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:25:18,913 INFO L495 AbstractCegarLoop]: Abstraction has 75 states and 83 transitions. [2022-11-22 01:25:18,913 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) [2022-11-22 01:25:18,913 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 83 transitions. [2022-11-22 01:25:18,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-11-22 01:25:18,915 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:25:18,915 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 01:25:18,915 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-22 01:25:18,915 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)] === [2022-11-22 01:25:18,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:25:18,916 INFO L85 PathProgramCache]: Analyzing trace with hash -400663963, now seen corresponding path program 1 times [2022-11-22 01:25:18,916 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:25:18,917 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [731230046] [2022-11-22 01:25:18,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:25:18,917 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:25:18,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:25:19,768 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-22 01:25:19,768 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:25:19,773 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [731230046] [2022-11-22 01:25:19,773 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [731230046] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 01:25:19,773 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 01:25:19,773 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-22 01:25:19,774 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1143833437] [2022-11-22 01:25:19,774 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:25:19,775 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-22 01:25:19,776 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:25:19,776 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-22 01:25:19,778 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2022-11-22 01:25:19,778 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) [2022-11-22 01:25:21,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:25:21,056 INFO L93 Difference]: Finished difference Result 201 states and 223 transitions. [2022-11-22 01:25:21,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-22 01:25:21,058 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 [2022-11-22 01:25:21,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:25:21,060 INFO L225 Difference]: With dead ends: 201 [2022-11-22 01:25:21,060 INFO L226 Difference]: Without dead ends: 201 [2022-11-22 01:25:21,061 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=96, Invalid=176, Unknown=0, NotChecked=0, Total=272 [2022-11-22 01:25:21,062 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 601 mSDsluCounter, 165 mSDsCounter, 0 mSdLazyCounter, 309 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 604 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, 0.6s IncrementalHoareTripleChecker+Time [2022-11-22 01:25:21,062 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [604 Valid, 195 Invalid, 320 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 309 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-22 01:25:21,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2022-11-22 01:25:21,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 106. [2022-11-22 01:25:21,079 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) [2022-11-22 01:25:21,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 151 transitions. [2022-11-22 01:25:21,087 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 151 transitions. Word has length 20 [2022-11-22 01:25:21,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:25:21,088 INFO L495 AbstractCegarLoop]: Abstraction has 106 states and 151 transitions. [2022-11-22 01:25:21,088 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) [2022-11-22 01:25:21,088 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 151 transitions. [2022-11-22 01:25:21,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-11-22 01:25:21,089 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:25:21,089 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 01:25:21,089 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-22 01:25:21,090 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)] === [2022-11-22 01:25:21,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:25:21,090 INFO L85 PathProgramCache]: Analyzing trace with hash -529353396, now seen corresponding path program 1 times [2022-11-22 01:25:21,090 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:25:21,091 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1084377902] [2022-11-22 01:25:21,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:25:21,091 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:25:21,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:25:21,690 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-22 01:25:21,690 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:25:21,691 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1084377902] [2022-11-22 01:25:21,693 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1084377902] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 01:25:21,696 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1181782962] [2022-11-22 01:25:21,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:25:21,696 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:25:21,697 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0dd9036d-146f-4358-9ac0-018e53d6ce12/bin/utaipan-g80aRyZoba/z3 [2022-11-22 01:25:21,700 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0dd9036d-146f-4358-9ac0-018e53d6ce12/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 01:25:21,735 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0dd9036d-146f-4358-9ac0-018e53d6ce12/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-22 01:25:21,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:25:21,816 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-22 01:25:21,830 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:25:21,985 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 [2022-11-22 01:25:21,998 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-22 01:25:22,338 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:25:22,339 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 [2022-11-22 01:25:22,355 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-22 01:25:22,356 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-11-22 01:25:22,744 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-22 01:25:22,744 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 01:25:23,035 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1181782962] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 01:25:23,036 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [730098007] [2022-11-22 01:25:23,060 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2022-11-22 01:25:23,060 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 01:25:23,066 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 01:25:23,072 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 01:25:23,072 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 01:25:23,455 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 [2022-11-22 01:25:23,462 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-11-22 01:25:23,527 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 [2022-11-22 01:25:23,675 INFO L321 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2022-11-22 01:25:23,676 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 [2022-11-22 01:25:23,708 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-22 01:25:23,708 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 [2022-11-22 01:25:23,838 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 [2022-11-22 01:25:23,851 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-22 01:25:24,001 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 [2022-11-22 01:25:24,014 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-22 01:25:24,301 INFO L197 IcfgInterpreter]: Interpreting procedure #Ultimate.meminit with input of size 70 for LOIs [2022-11-22 01:25:24,337 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 8 for LOIs [2022-11-22 01:25:24,339 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 01:25:27,817 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 [2022-11-22 01:25:27,818 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-22 01:25:27,818 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-22 01:25:27,818 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 16 [2022-11-22 01:25:27,818 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1539735527] [2022-11-22 01:25:27,818 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-22 01:25:27,819 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-11-22 01:25:27,819 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:25:27,820 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-11-22 01:25:27,820 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=169, Invalid=1163, Unknown=0, NotChecked=0, Total=1332 [2022-11-22 01:25:27,821 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) [2022-11-22 01:25:30,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:25:30,216 INFO L93 Difference]: Finished difference Result 205 states and 227 transitions. [2022-11-22 01:25:30,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-11-22 01:25:30,217 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 [2022-11-22 01:25:30,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:25:30,219 INFO L225 Difference]: With dead ends: 205 [2022-11-22 01:25:30,219 INFO L226 Difference]: Without dead ends: 205 [2022-11-22 01:25:30,220 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 691 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=340, Invalid=2210, Unknown=0, NotChecked=0, Total=2550 [2022-11-22 01:25:30,221 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 1045 mSDsluCounter, 255 mSDsCounter, 0 mSdLazyCounter, 1051 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1046 SdHoareTripleChecker+Valid, 296 SdHoareTripleChecker+Invalid, 1098 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 1051 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-11-22 01:25:30,222 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1046 Valid, 296 Invalid, 1098 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 1051 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-11-22 01:25:30,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2022-11-22 01:25:30,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 84. [2022-11-22 01:25:30,245 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) [2022-11-22 01:25:30,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 97 transitions. [2022-11-22 01:25:30,246 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 97 transitions. Word has length 21 [2022-11-22 01:25:30,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:25:30,247 INFO L495 AbstractCegarLoop]: Abstraction has 84 states and 97 transitions. [2022-11-22 01:25:30,247 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) [2022-11-22 01:25:30,247 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 97 transitions. [2022-11-22 01:25:30,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-11-22 01:25:30,248 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:25:30,248 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 01:25:30,259 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0dd9036d-146f-4358-9ac0-018e53d6ce12/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-22 01:25:30,454 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0dd9036d-146f-4358-9ac0-018e53d6ce12/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2022-11-22 01:25:30,455 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)] === [2022-11-22 01:25:30,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:25:30,455 INFO L85 PathProgramCache]: Analyzing trace with hash 464319011, now seen corresponding path program 1 times [2022-11-22 01:25:30,456 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:25:30,456 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1879365512] [2022-11-22 01:25:30,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:25:30,456 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:25:30,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:25:30,526 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-22 01:25:30,526 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:25:30,526 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1879365512] [2022-11-22 01:25:30,526 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1879365512] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 01:25:30,527 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 01:25:30,527 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-22 01:25:30,527 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1257370194] [2022-11-22 01:25:30,527 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:25:30,528 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-22 01:25:30,528 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:25:30,528 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-22 01:25:30,529 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-22 01:25:30,529 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) [2022-11-22 01:25:30,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:25:30,609 INFO L93 Difference]: Finished difference Result 83 states and 96 transitions. [2022-11-22 01:25:30,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-22 01:25:30,610 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 [2022-11-22 01:25:30,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:25:30,615 INFO L225 Difference]: With dead ends: 83 [2022-11-22 01:25:30,615 INFO L226 Difference]: Without dead ends: 83 [2022-11-22 01:25:30,615 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-22 01:25:30,618 INFO L413 NwaCegarLoop]: 44 mSDtfsCounter, 111 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s 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, 0.1s IncrementalHoareTripleChecker+Time [2022-11-22 01:25:30,619 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [111 Valid, 66 Invalid, 61 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-22 01:25:30,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2022-11-22 01:25:30,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 83. [2022-11-22 01:25:30,634 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) [2022-11-22 01:25:30,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 96 transitions. [2022-11-22 01:25:30,636 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 96 transitions. Word has length 21 [2022-11-22 01:25:30,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:25:30,636 INFO L495 AbstractCegarLoop]: Abstraction has 83 states and 96 transitions. [2022-11-22 01:25:30,636 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) [2022-11-22 01:25:30,636 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 96 transitions. [2022-11-22 01:25:30,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-11-22 01:25:30,637 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:25:30,637 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 01:25:30,637 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-22 01:25:30,638 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)] === [2022-11-22 01:25:30,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:25:30,638 INFO L85 PathProgramCache]: Analyzing trace with hash 464319012, now seen corresponding path program 1 times [2022-11-22 01:25:30,638 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:25:30,638 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1926388927] [2022-11-22 01:25:30,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:25:30,639 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:25:30,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:25:30,928 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-22 01:25:30,928 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:25:30,928 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1926388927] [2022-11-22 01:25:30,928 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1926388927] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 01:25:30,928 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 01:25:30,929 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-22 01:25:30,929 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1554635346] [2022-11-22 01:25:30,929 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:25:30,929 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-22 01:25:30,929 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:25:30,930 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-22 01:25:30,930 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-11-22 01:25:30,930 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) [2022-11-22 01:25:31,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:25:31,410 INFO L93 Difference]: Finished difference Result 137 states and 154 transitions. [2022-11-22 01:25:31,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-22 01:25:31,410 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 [2022-11-22 01:25:31,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:25:31,411 INFO L225 Difference]: With dead ends: 137 [2022-11-22 01:25:31,411 INFO L226 Difference]: Without dead ends: 137 [2022-11-22 01:25:31,412 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2022-11-22 01:25:31,412 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 297 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 279 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 297 SdHoareTripleChecker+Valid, 77 SdHoareTripleChecker+Invalid, 283 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 279 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-22 01:25:31,413 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [297 Valid, 77 Invalid, 283 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 279 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-22 01:25:31,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2022-11-22 01:25:31,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 106. [2022-11-22 01:25:31,418 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) [2022-11-22 01:25:31,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 148 transitions. [2022-11-22 01:25:31,419 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 148 transitions. Word has length 21 [2022-11-22 01:25:31,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:25:31,420 INFO L495 AbstractCegarLoop]: Abstraction has 106 states and 148 transitions. [2022-11-22 01:25:31,420 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) [2022-11-22 01:25:31,420 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 148 transitions. [2022-11-22 01:25:31,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-11-22 01:25:31,421 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:25:31,421 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 01:25:31,421 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-22 01:25:31,421 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)] === [2022-11-22 01:25:31,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:25:31,422 INFO L85 PathProgramCache]: Analyzing trace with hash 464496812, now seen corresponding path program 1 times [2022-11-22 01:25:31,422 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:25:31,422 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [222383629] [2022-11-22 01:25:31,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:25:31,422 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:25:31,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:25:31,513 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-22 01:25:31,513 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:25:31,514 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [222383629] [2022-11-22 01:25:31,514 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [222383629] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 01:25:31,514 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 01:25:31,514 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-22 01:25:31,514 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [44965632] [2022-11-22 01:25:31,514 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:25:31,515 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-22 01:25:31,515 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:25:31,515 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-22 01:25:31,515 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-22 01:25:31,515 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) [2022-11-22 01:25:31,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:25:31,625 INFO L93 Difference]: Finished difference Result 100 states and 136 transitions. [2022-11-22 01:25:31,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-22 01:25:31,626 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 [2022-11-22 01:25:31,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:25:31,627 INFO L225 Difference]: With dead ends: 100 [2022-11-22 01:25:31,627 INFO L226 Difference]: Without dead ends: 100 [2022-11-22 01:25:31,627 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 [2022-11-22 01:25:31,628 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 [2022-11-22 01:25:31,628 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] [2022-11-22 01:25:31,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2022-11-22 01:25:31,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 100. [2022-11-22 01:25:31,633 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) [2022-11-22 01:25:31,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 136 transitions. [2022-11-22 01:25:31,635 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 136 transitions. Word has length 21 [2022-11-22 01:25:31,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:25:31,635 INFO L495 AbstractCegarLoop]: Abstraction has 100 states and 136 transitions. [2022-11-22 01:25:31,635 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) [2022-11-22 01:25:31,635 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 136 transitions. [2022-11-22 01:25:31,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-11-22 01:25:31,636 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:25:31,636 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 01:25:31,636 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-22 01:25:31,637 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)] === [2022-11-22 01:25:31,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:25:31,637 INFO L85 PathProgramCache]: Analyzing trace with hash 464496813, now seen corresponding path program 1 times [2022-11-22 01:25:31,637 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:25:31,638 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1139715425] [2022-11-22 01:25:31,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:25:31,638 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:25:31,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:25:31,780 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-22 01:25:31,780 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:25:31,780 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1139715425] [2022-11-22 01:25:31,781 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1139715425] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 01:25:31,781 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 01:25:31,781 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-22 01:25:31,781 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [408322508] [2022-11-22 01:25:31,781 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:25:31,781 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-22 01:25:31,782 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:25:31,782 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-22 01:25:31,782 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2022-11-22 01:25:31,782 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) [2022-11-22 01:25:31,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:25:31,952 INFO L93 Difference]: Finished difference Result 133 states and 150 transitions. [2022-11-22 01:25:31,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-22 01:25:31,953 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 [2022-11-22 01:25:31,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:25:31,954 INFO L225 Difference]: With dead ends: 133 [2022-11-22 01:25:31,954 INFO L226 Difference]: Without dead ends: 133 [2022-11-22 01:25:31,954 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2022-11-22 01:25:31,955 INFO L413 NwaCegarLoop]: 51 mSDtfsCounter, 320 mSDsluCounter, 175 mSDsCounter, 0 mSdLazyCounter, 142 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 323 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 [2022-11-22 01:25:31,955 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [323 Valid, 226 Invalid, 151 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 142 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-22 01:25:31,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2022-11-22 01:25:31,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 70. [2022-11-22 01:25:31,959 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) [2022-11-22 01:25:31,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 78 transitions. [2022-11-22 01:25:31,960 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 78 transitions. Word has length 21 [2022-11-22 01:25:31,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:25:31,960 INFO L495 AbstractCegarLoop]: Abstraction has 70 states and 78 transitions. [2022-11-22 01:25:31,961 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) [2022-11-22 01:25:31,961 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 78 transitions. [2022-11-22 01:25:31,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-11-22 01:25:31,961 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:25:31,961 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] [2022-11-22 01:25:31,962 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-22 01:25:31,962 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)] === [2022-11-22 01:25:31,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:25:31,962 INFO L85 PathProgramCache]: Analyzing trace with hash -465867667, now seen corresponding path program 1 times [2022-11-22 01:25:31,962 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:25:31,962 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1062690441] [2022-11-22 01:25:31,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:25:31,963 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:25:31,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:25:32,118 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-22 01:25:32,119 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:25:32,119 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1062690441] [2022-11-22 01:25:32,119 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1062690441] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 01:25:32,119 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1754495382] [2022-11-22 01:25:32,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:25:32,119 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:25:32,119 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0dd9036d-146f-4358-9ac0-018e53d6ce12/bin/utaipan-g80aRyZoba/z3 [2022-11-22 01:25:32,129 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0dd9036d-146f-4358-9ac0-018e53d6ce12/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 01:25:32,150 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0dd9036d-146f-4358-9ac0-018e53d6ce12/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-22 01:25:32,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:25:32,230 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-22 01:25:32,231 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:25:32,507 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-22 01:25:32,507 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-22 01:25:32,507 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1754495382] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 01:25:32,507 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-22 01:25:32,507 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [9] total 15 [2022-11-22 01:25:32,508 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1311381516] [2022-11-22 01:25:32,508 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:25:32,508 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-22 01:25:32,508 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:25:32,509 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-22 01:25:32,509 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2022-11-22 01:25:32,509 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) [2022-11-22 01:25:32,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:25:32,792 INFO L93 Difference]: Finished difference Result 129 states and 145 transitions. [2022-11-22 01:25:32,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-22 01:25:32,792 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 [2022-11-22 01:25:32,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:25:32,794 INFO L225 Difference]: With dead ends: 129 [2022-11-22 01:25:32,794 INFO L226 Difference]: Without dead ends: 129 [2022-11-22 01:25:32,795 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=109, Invalid=271, Unknown=0, NotChecked=0, Total=380 [2022-11-22 01:25:32,797 INFO L413 NwaCegarLoop]: 51 mSDtfsCounter, 291 mSDsluCounter, 178 mSDsCounter, 0 mSdLazyCounter, 153 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 294 SdHoareTripleChecker+Valid, 229 SdHoareTripleChecker+Invalid, 161 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 153 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-22 01:25:32,797 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [294 Valid, 229 Invalid, 161 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 153 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-22 01:25:32,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2022-11-22 01:25:32,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 81. [2022-11-22 01:25:32,810 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) [2022-11-22 01:25:32,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 93 transitions. [2022-11-22 01:25:32,815 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 93 transitions. Word has length 23 [2022-11-22 01:25:32,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:25:32,818 INFO L495 AbstractCegarLoop]: Abstraction has 81 states and 93 transitions. [2022-11-22 01:25:32,819 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) [2022-11-22 01:25:32,821 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 93 transitions. [2022-11-22 01:25:32,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-11-22 01:25:32,823 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:25:32,823 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] [2022-11-22 01:25:32,831 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0dd9036d-146f-4358-9ac0-018e53d6ce12/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-22 01:25:33,030 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0dd9036d-146f-4358-9ac0-018e53d6ce12/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2022-11-22 01:25:33,030 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)] === [2022-11-22 01:25:33,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:25:33,031 INFO L85 PathProgramCache]: Analyzing trace with hash 1153029158, now seen corresponding path program 1 times [2022-11-22 01:25:33,031 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:25:33,031 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1421946214] [2022-11-22 01:25:33,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:25:33,031 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:25:33,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:25:33,452 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-22 01:25:33,452 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:25:33,452 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1421946214] [2022-11-22 01:25:33,452 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1421946214] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 01:25:33,452 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2000278132] [2022-11-22 01:25:33,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:25:33,452 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:25:33,453 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0dd9036d-146f-4358-9ac0-018e53d6ce12/bin/utaipan-g80aRyZoba/z3 [2022-11-22 01:25:33,454 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0dd9036d-146f-4358-9ac0-018e53d6ce12/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 01:25:33,475 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0dd9036d-146f-4358-9ac0-018e53d6ce12/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-22 01:25:33,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:25:33,605 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 29 conjunts are in the unsatisfiable core [2022-11-22 01:25:33,609 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:25:33,672 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 [2022-11-22 01:25:33,681 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-22 01:25:33,863 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-22 01:25:33,863 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 [2022-11-22 01:25:33,881 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-22 01:25:33,882 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-11-22 01:25:34,327 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-22 01:25:34,327 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 01:25:37,149 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2000278132] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 01:25:37,149 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [538512151] [2022-11-22 01:25:37,152 INFO L159 IcfgInterpreter]: Started Sifa with 18 locations of interest [2022-11-22 01:25:37,152 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 01:25:37,152 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 01:25:37,153 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 01:25:37,153 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 01:25:37,414 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 [2022-11-22 01:25:37,428 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-11-22 01:25:37,473 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2022-11-22 01:25:37,582 INFO L321 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2022-11-22 01:25:37,582 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 [2022-11-22 01:25:37,616 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-22 01:25:37,617 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 128 treesize of output 130 [2022-11-22 01:25:37,739 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 [2022-11-22 01:25:37,751 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-22 01:25:37,879 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 [2022-11-22 01:25:37,890 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-22 01:25:38,011 INFO L321 Elim1Store]: treesize reduction 28, result has 15.2 percent of original size [2022-11-22 01:25:38,012 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 [2022-11-22 01:25:38,092 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:25:38,106 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-22 01:25:38,106 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 [2022-11-22 01:25:38,135 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:25:38,148 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-22 01:25:38,149 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 [2022-11-22 01:25:38,326 INFO L197 IcfgInterpreter]: Interpreting procedure #Ultimate.meminit with input of size 70 for LOIs [2022-11-22 01:25:38,355 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 8 for LOIs [2022-11-22 01:25:38,357 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 01:25:42,249 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 [2022-11-22 01:25:42,249 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-22 01:25:42,250 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-22 01:25:42,250 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 11] total 18 [2022-11-22 01:25:42,250 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [713728180] [2022-11-22 01:25:42,250 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-22 01:25:42,251 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-11-22 01:25:42,251 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:25:42,251 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-11-22 01:25:42,252 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=193, Invalid=1527, Unknown=2, NotChecked=0, Total=1722 [2022-11-22 01:25:42,252 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) [2022-11-22 01:25:44,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:25:44,125 INFO L93 Difference]: Finished difference Result 133 states and 149 transitions. [2022-11-22 01:25:44,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-11-22 01:25:44,126 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 [2022-11-22 01:25:44,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:25:44,127 INFO L225 Difference]: With dead ends: 133 [2022-11-22 01:25:44,127 INFO L226 Difference]: Without dead ends: 133 [2022-11-22 01:25:44,128 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 997 ImplicationChecksByTransitivity, 7.9s TimeCoverageRelationStatistics Valid=418, Invalid=2886, Unknown=2, NotChecked=0, Total=3306 [2022-11-22 01:25:44,129 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 800 mSDsluCounter, 236 mSDsCounter, 0 mSdLazyCounter, 922 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 801 SdHoareTripleChecker+Valid, 276 SdHoareTripleChecker+Invalid, 970 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 922 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-22 01:25:44,129 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [801 Valid, 276 Invalid, 970 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 922 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-11-22 01:25:44,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2022-11-22 01:25:44,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 83. [2022-11-22 01:25:44,133 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) [2022-11-22 01:25:44,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 95 transitions. [2022-11-22 01:25:44,134 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 95 transitions. Word has length 24 [2022-11-22 01:25:44,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:25:44,134 INFO L495 AbstractCegarLoop]: Abstraction has 83 states and 95 transitions. [2022-11-22 01:25:44,134 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) [2022-11-22 01:25:44,134 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 95 transitions. [2022-11-22 01:25:44,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-11-22 01:25:44,135 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:25:44,135 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] [2022-11-22 01:25:44,143 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0dd9036d-146f-4358-9ac0-018e53d6ce12/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-22 01:25:44,341 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0dd9036d-146f-4358-9ac0-018e53d6ce12/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:25:44,341 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)] === [2022-11-22 01:25:44,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:25:44,342 INFO L85 PathProgramCache]: Analyzing trace with hash -1556818011, now seen corresponding path program 1 times [2022-11-22 01:25:44,342 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:25:44,342 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1363893827] [2022-11-22 01:25:44,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:25:44,342 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:25:44,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:25:44,664 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-22 01:25:44,664 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:25:44,664 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1363893827] [2022-11-22 01:25:44,664 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1363893827] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 01:25:44,664 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [435728876] [2022-11-22 01:25:44,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:25:44,665 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:25:44,665 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0dd9036d-146f-4358-9ac0-018e53d6ce12/bin/utaipan-g80aRyZoba/z3 [2022-11-22 01:25:44,669 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0dd9036d-146f-4358-9ac0-018e53d6ce12/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 01:25:44,678 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0dd9036d-146f-4358-9ac0-018e53d6ce12/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-22 01:25:44,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:25:44,744 INFO L263 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-22 01:25:44,746 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:25:44,947 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-22 01:25:44,947 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 01:25:45,061 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 [2022-11-22 01:25:45,157 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-22 01:25:45,157 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [435728876] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 01:25:45,157 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2025040699] [2022-11-22 01:25:45,160 INFO L159 IcfgInterpreter]: Started Sifa with 20 locations of interest [2022-11-22 01:25:45,160 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 01:25:45,160 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 01:25:45,161 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 01:25:45,161 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 01:25:45,373 INFO L321 Elim1Store]: treesize reduction 54, result has 22.9 percent of original size [2022-11-22 01:25:45,374 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 [2022-11-22 01:25:45,522 INFO L321 Elim1Store]: treesize reduction 66, result has 19.5 percent of original size [2022-11-22 01:25:45,523 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 [2022-11-22 01:25:45,627 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2022-11-22 01:25:45,745 INFO L321 Elim1Store]: treesize reduction 66, result has 19.5 percent of original size [2022-11-22 01:25:45,745 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 [2022-11-22 01:25:46,021 INFO L321 Elim1Store]: treesize reduction 96, result has 17.9 percent of original size [2022-11-22 01:25:46,022 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 [2022-11-22 01:25:46,212 INFO L321 Elim1Store]: treesize reduction 182, result has 12.5 percent of original size [2022-11-22 01:25:46,212 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 [2022-11-22 01:25:46,452 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 [2022-11-22 01:25:46,472 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-22 01:25:46,651 INFO L321 Elim1Store]: treesize reduction 182, result has 12.5 percent of original size [2022-11-22 01:25:46,652 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 [2022-11-22 01:25:46,885 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 [2022-11-22 01:25:46,903 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-22 01:25:47,101 INFO L321 Elim1Store]: treesize reduction 28, result has 15.2 percent of original size [2022-11-22 01:25:47,102 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 [2022-11-22 01:25:47,300 INFO L321 Elim1Store]: treesize reduction 28, result has 15.2 percent of original size [2022-11-22 01:25:47,300 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 [2022-11-22 01:25:47,562 INFO L321 Elim1Store]: treesize reduction 182, result has 12.5 percent of original size [2022-11-22 01:25:47,562 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 [2022-11-22 01:25:47,852 INFO L321 Elim1Store]: treesize reduction 66, result has 19.5 percent of original size [2022-11-22 01:25:47,854 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 [2022-11-22 01:25:48,004 INFO L197 IcfgInterpreter]: Interpreting procedure #Ultimate.meminit with input of size 25 for LOIs [2022-11-22 01:25:48,010 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2022-11-22 01:25:48,012 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 8 for LOIs [2022-11-22 01:25:48,013 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 01:25:52,546 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 [2022-11-22 01:25:52,547 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-22 01:25:52,547 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-22 01:25:52,547 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 24 [2022-11-22 01:25:52,547 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [399488178] [2022-11-22 01:25:52,547 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-22 01:25:52,548 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-11-22 01:25:52,548 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:25:52,549 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-11-22 01:25:52,549 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=289, Invalid=1603, Unknown=0, NotChecked=0, Total=1892 [2022-11-22 01:25:52,550 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) [2022-11-22 01:25:53,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:25:53,509 INFO L93 Difference]: Finished difference Result 129 states and 145 transitions. [2022-11-22 01:25:53,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-22 01:25:53,510 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 [2022-11-22 01:25:53,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:25:53,511 INFO L225 Difference]: With dead ends: 129 [2022-11-22 01:25:53,511 INFO L226 Difference]: Without dead ends: 129 [2022-11-22 01:25:53,512 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 37 SyntacticMatches, 2 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1282 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=619, Invalid=3041, Unknown=0, NotChecked=0, Total=3660 [2022-11-22 01:25:53,513 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 1425 mSDsluCounter, 156 mSDsCounter, 0 mSdLazyCounter, 328 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1426 SdHoareTripleChecker+Valid, 189 SdHoareTripleChecker+Invalid, 351 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 328 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-22 01:25:53,514 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1426 Valid, 189 Invalid, 351 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 328 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-22 01:25:53,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2022-11-22 01:25:53,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 82. [2022-11-22 01:25:53,521 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) [2022-11-22 01:25:53,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 94 transitions. [2022-11-22 01:25:53,524 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 94 transitions. Word has length 24 [2022-11-22 01:25:53,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:25:53,525 INFO L495 AbstractCegarLoop]: Abstraction has 82 states and 94 transitions. [2022-11-22 01:25:53,525 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) [2022-11-22 01:25:53,525 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 94 transitions. [2022-11-22 01:25:53,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-11-22 01:25:53,531 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:25:53,531 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] [2022-11-22 01:25:53,542 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0dd9036d-146f-4358-9ac0-018e53d6ce12/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-22 01:25:53,737 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0dd9036d-146f-4358-9ac0-018e53d6ce12/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-22 01:25:53,737 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)] === [2022-11-22 01:25:53,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:25:53,737 INFO L85 PathProgramCache]: Analyzing trace with hash 1384165507, now seen corresponding path program 1 times [2022-11-22 01:25:53,737 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:25:53,738 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1644968128] [2022-11-22 01:25:53,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:25:53,738 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:25:53,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:25:54,089 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-22 01:25:54,090 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:25:54,090 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1644968128] [2022-11-22 01:25:54,090 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1644968128] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 01:25:54,090 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1392395658] [2022-11-22 01:25:54,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:25:54,090 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:25:54,090 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0dd9036d-146f-4358-9ac0-018e53d6ce12/bin/utaipan-g80aRyZoba/z3 [2022-11-22 01:25:54,091 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0dd9036d-146f-4358-9ac0-018e53d6ce12/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 01:25:54,115 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0dd9036d-146f-4358-9ac0-018e53d6ce12/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-22 01:25:54,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:25:54,172 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-22 01:25:54,175 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:25:54,180 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 [2022-11-22 01:25:54,305 INFO L321 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2022-11-22 01:25:54,305 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 [2022-11-22 01:25:54,777 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-22 01:25:54,777 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 01:25:55,057 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1392395658] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 01:25:55,057 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1000456252] [2022-11-22 01:25:55,059 INFO L159 IcfgInterpreter]: Started Sifa with 18 locations of interest [2022-11-22 01:25:55,059 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 01:25:55,060 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 01:25:55,060 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 01:25:55,060 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 01:25:55,505 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 0 case distinctions, treesize of input 12 treesize of output 9 [2022-11-22 01:25:55,511 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 [2022-11-22 01:25:55,547 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2022-11-22 01:25:55,649 INFO L321 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2022-11-22 01:25:55,650 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 [2022-11-22 01:25:55,686 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-22 01:25:55,686 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 [2022-11-22 01:25:55,829 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 [2022-11-22 01:25:55,843 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-22 01:25:55,926 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 [2022-11-22 01:25:55,937 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-22 01:25:56,055 INFO L321 Elim1Store]: treesize reduction 28, result has 15.2 percent of original size [2022-11-22 01:25:56,055 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 [2022-11-22 01:25:56,127 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:25:56,141 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-22 01:25:56,141 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 [2022-11-22 01:25:56,170 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:25:56,183 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-22 01:25:56,183 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 [2022-11-22 01:25:56,319 INFO L197 IcfgInterpreter]: Interpreting procedure #Ultimate.meminit with input of size 70 for LOIs [2022-11-22 01:25:56,352 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 8 for LOIs [2022-11-22 01:25:56,354 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 01:25:58,941 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 [2022-11-22 01:25:58,941 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-22 01:25:58,941 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-22 01:25:58,941 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2022-11-22 01:25:58,941 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [665656264] [2022-11-22 01:25:58,941 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-22 01:25:58,942 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-22 01:25:58,942 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:25:58,942 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-22 01:25:58,943 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=167, Invalid=1093, Unknown=0, NotChecked=0, Total=1260 [2022-11-22 01:25:58,943 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) [2022-11-22 01:25:59,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:25:59,554 INFO L93 Difference]: Finished difference Result 80 states and 92 transitions. [2022-11-22 01:25:59,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-22 01:25:59,555 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 [2022-11-22 01:25:59,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:25:59,555 INFO L225 Difference]: With dead ends: 80 [2022-11-22 01:25:59,555 INFO L226 Difference]: Without dead ends: 80 [2022-11-22 01:25:59,556 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 482 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=241, Invalid=1399, Unknown=0, NotChecked=0, Total=1640 [2022-11-22 01:25:59,557 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 293 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 315 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 293 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 323 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 315 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-22 01:25:59,557 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [293 Valid, 61 Invalid, 323 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 315 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-22 01:25:59,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2022-11-22 01:25:59,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 80. [2022-11-22 01:25:59,560 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) [2022-11-22 01:25:59,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 92 transitions. [2022-11-22 01:25:59,561 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 92 transitions. Word has length 25 [2022-11-22 01:25:59,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:25:59,561 INFO L495 AbstractCegarLoop]: Abstraction has 80 states and 92 transitions. [2022-11-22 01:25:59,561 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) [2022-11-22 01:25:59,561 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 92 transitions. [2022-11-22 01:25:59,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-11-22 01:25:59,562 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:25:59,562 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] [2022-11-22 01:25:59,572 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0dd9036d-146f-4358-9ac0-018e53d6ce12/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-22 01:25:59,767 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0dd9036d-146f-4358-9ac0-018e53d6ce12/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-11-22 01:25:59,767 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)] === [2022-11-22 01:25:59,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:25:59,768 INFO L85 PathProgramCache]: Analyzing trace with hash -1016877298, now seen corresponding path program 1 times [2022-11-22 01:25:59,768 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:25:59,768 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1864422734] [2022-11-22 01:25:59,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:25:59,768 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:25:59,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:25:59,815 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-22 01:25:59,815 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:25:59,815 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1864422734] [2022-11-22 01:25:59,816 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1864422734] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 01:25:59,816 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 01:25:59,816 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-22 01:25:59,816 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1350778934] [2022-11-22 01:25:59,816 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:25:59,817 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-22 01:25:59,817 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:25:59,817 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-22 01:25:59,817 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-22 01:25:59,817 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) [2022-11-22 01:25:59,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:25:59,884 INFO L93 Difference]: Finished difference Result 77 states and 89 transitions. [2022-11-22 01:25:59,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-22 01:25:59,885 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 [2022-11-22 01:25:59,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:25:59,885 INFO L225 Difference]: With dead ends: 77 [2022-11-22 01:25:59,886 INFO L226 Difference]: Without dead ends: 77 [2022-11-22 01:25:59,886 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-22 01:25:59,886 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, 0.1s IncrementalHoareTripleChecker+Time [2022-11-22 01:25:59,887 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [81 Valid, 70 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-22 01:25:59,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2022-11-22 01:25:59,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 77. [2022-11-22 01:25:59,889 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) [2022-11-22 01:25:59,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 89 transitions. [2022-11-22 01:25:59,890 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 89 transitions. Word has length 25 [2022-11-22 01:25:59,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:25:59,891 INFO L495 AbstractCegarLoop]: Abstraction has 77 states and 89 transitions. [2022-11-22 01:25:59,891 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) [2022-11-22 01:25:59,891 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 89 transitions. [2022-11-22 01:25:59,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-11-22 01:25:59,892 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:25:59,892 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] [2022-11-22 01:25:59,892 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-11-22 01:25:59,892 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)] === [2022-11-22 01:25:59,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:25:59,893 INFO L85 PathProgramCache]: Analyzing trace with hash -1016877297, now seen corresponding path program 1 times [2022-11-22 01:25:59,893 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:25:59,893 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [873436145] [2022-11-22 01:25:59,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:25:59,894 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:25:59,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:25:59,999 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-22 01:25:59,999 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:25:59,999 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [873436145] [2022-11-22 01:25:59,999 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [873436145] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 01:26:00,000 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1620537293] [2022-11-22 01:26:00,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:26:00,000 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:26:00,000 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0dd9036d-146f-4358-9ac0-018e53d6ce12/bin/utaipan-g80aRyZoba/z3 [2022-11-22 01:26:00,003 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0dd9036d-146f-4358-9ac0-018e53d6ce12/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 01:26:00,035 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0dd9036d-146f-4358-9ac0-018e53d6ce12/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-22 01:26:00,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:26:00,089 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-22 01:26:00,090 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:26:00,121 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-22 01:26:00,121 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 01:26:00,163 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-22 01:26:00,163 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1620537293] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 01:26:00,164 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [292742454] [2022-11-22 01:26:00,168 INFO L159 IcfgInterpreter]: Started Sifa with 21 locations of interest [2022-11-22 01:26:00,168 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 01:26:00,169 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 01:26:00,169 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 01:26:00,170 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 01:26:00,385 INFO L321 Elim1Store]: treesize reduction 54, result has 22.9 percent of original size [2022-11-22 01:26:00,385 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 [2022-11-22 01:26:00,514 INFO L321 Elim1Store]: treesize reduction 66, result has 19.5 percent of original size [2022-11-22 01:26:00,515 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 [2022-11-22 01:26:00,611 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2022-11-22 01:26:00,726 INFO L321 Elim1Store]: treesize reduction 66, result has 19.5 percent of original size [2022-11-22 01:26:00,727 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 [2022-11-22 01:26:00,983 INFO L321 Elim1Store]: treesize reduction 96, result has 17.9 percent of original size [2022-11-22 01:26:00,983 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 [2022-11-22 01:26:01,162 INFO L321 Elim1Store]: treesize reduction 182, result has 12.5 percent of original size [2022-11-22 01:26:01,163 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 [2022-11-22 01:26:01,383 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 [2022-11-22 01:26:01,402 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-22 01:26:01,566 INFO L321 Elim1Store]: treesize reduction 182, result has 12.5 percent of original size [2022-11-22 01:26:01,567 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 [2022-11-22 01:26:01,809 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 [2022-11-22 01:26:01,827 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-22 01:26:01,996 INFO L321 Elim1Store]: treesize reduction 28, result has 15.2 percent of original size [2022-11-22 01:26:01,997 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 [2022-11-22 01:26:02,186 INFO L321 Elim1Store]: treesize reduction 38, result has 11.6 percent of original size [2022-11-22 01:26:02,187 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 [2022-11-22 01:26:02,430 INFO L321 Elim1Store]: treesize reduction 182, result has 12.5 percent of original size [2022-11-22 01:26:02,431 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 [2022-11-22 01:26:02,696 INFO L321 Elim1Store]: treesize reduction 66, result has 19.5 percent of original size [2022-11-22 01:26:02,697 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 [2022-11-22 01:26:02,840 INFO L197 IcfgInterpreter]: Interpreting procedure #Ultimate.meminit with input of size 25 for LOIs [2022-11-22 01:26:02,848 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2022-11-22 01:26:02,850 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 8 for LOIs [2022-11-22 01:26:02,855 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 01:26:06,355 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [292742454] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 01:26:06,355 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-11-22 01:26:06,355 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [6, 5, 5] total 26 [2022-11-22 01:26:06,355 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [763166898] [2022-11-22 01:26:06,355 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:26:06,356 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-11-22 01:26:06,356 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:26:06,356 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-11-22 01:26:06,357 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=542, Unknown=0, NotChecked=0, Total=650 [2022-11-22 01:26:06,357 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) [2022-11-22 01:26:07,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:26:07,371 INFO L93 Difference]: Finished difference Result 115 states and 128 transitions. [2022-11-22 01:26:07,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-11-22 01:26:07,371 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 [2022-11-22 01:26:07,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:26:07,372 INFO L225 Difference]: With dead ends: 115 [2022-11-22 01:26:07,372 INFO L226 Difference]: Without dead ends: 115 [2022-11-22 01:26:07,373 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 55 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 175 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=108, Invalid=542, Unknown=0, NotChecked=0, Total=650 [2022-11-22 01:26:07,373 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 120 mSDsluCounter, 187 mSDsCounter, 0 mSdLazyCounter, 640 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 123 SdHoareTripleChecker+Valid, 222 SdHoareTripleChecker+Invalid, 648 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 640 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-22 01:26:07,374 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [123 Valid, 222 Invalid, 648 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 640 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-11-22 01:26:07,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2022-11-22 01:26:07,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 80. [2022-11-22 01:26:07,377 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) [2022-11-22 01:26:07,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 91 transitions. [2022-11-22 01:26:07,377 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 91 transitions. Word has length 25 [2022-11-22 01:26:07,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:26:07,378 INFO L495 AbstractCegarLoop]: Abstraction has 80 states and 91 transitions. [2022-11-22 01:26:07,378 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) [2022-11-22 01:26:07,378 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 91 transitions. [2022-11-22 01:26:07,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-11-22 01:26:07,379 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:26:07,379 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] [2022-11-22 01:26:07,388 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0dd9036d-146f-4358-9ac0-018e53d6ce12/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-11-22 01:26:07,583 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0dd9036d-146f-4358-9ac0-018e53d6ce12/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:26:07,583 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)] === [2022-11-22 01:26:07,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:26:07,584 INFO L85 PathProgramCache]: Analyzing trace with hash -1256648948, now seen corresponding path program 2 times [2022-11-22 01:26:07,584 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:26:07,584 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1076684417] [2022-11-22 01:26:07,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:26:07,584 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:26:07,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:26:08,073 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-22 01:26:08,073 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:26:08,073 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1076684417] [2022-11-22 01:26:08,073 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1076684417] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 01:26:08,073 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1926498664] [2022-11-22 01:26:08,073 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-22 01:26:08,073 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:26:08,073 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0dd9036d-146f-4358-9ac0-018e53d6ce12/bin/utaipan-g80aRyZoba/z3 [2022-11-22 01:26:08,074 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0dd9036d-146f-4358-9ac0-018e53d6ce12/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 01:26:08,076 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0dd9036d-146f-4358-9ac0-018e53d6ce12/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-22 01:26:08,208 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-22 01:26:08,208 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-22 01:26:08,210 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 33 conjunts are in the unsatisfiable core [2022-11-22 01:26:08,212 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:26:08,253 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-22 01:26:08,260 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 [2022-11-22 01:26:08,453 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-22 01:26:08,454 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 [2022-11-22 01:26:08,474 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-22 01:26:08,475 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-11-22 01:26:09,002 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-22 01:26:09,002 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 01:26:10,009 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1926498664] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 01:26:10,010 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [805746350] [2022-11-22 01:26:10,012 INFO L159 IcfgInterpreter]: Started Sifa with 18 locations of interest [2022-11-22 01:26:10,012 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 01:26:10,012 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 01:26:10,013 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 01:26:10,013 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 01:26:10,208 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 [2022-11-22 01:26:10,221 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-11-22 01:26:10,260 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2022-11-22 01:26:10,353 INFO L321 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2022-11-22 01:26:10,354 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 [2022-11-22 01:26:10,383 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-22 01:26:10,383 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 [2022-11-22 01:26:10,500 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 [2022-11-22 01:26:10,521 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-22 01:26:10,607 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 [2022-11-22 01:26:10,618 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-22 01:26:10,683 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 [2022-11-22 01:26:10,806 INFO L321 Elim1Store]: treesize reduction 84, result has 9.7 percent of original size [2022-11-22 01:26:10,807 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 [2022-11-22 01:26:10,895 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:26:10,908 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-22 01:26:10,908 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 [2022-11-22 01:26:10,931 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:26:10,944 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-22 01:26:10,945 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 [2022-11-22 01:26:11,124 INFO L197 IcfgInterpreter]: Interpreting procedure #Ultimate.meminit with input of size 70 for LOIs [2022-11-22 01:26:11,154 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 8 for LOIs [2022-11-22 01:26:11,155 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 01:26:14,092 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 [2022-11-22 01:26:14,092 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-22 01:26:14,092 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-22 01:26:14,093 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 18 [2022-11-22 01:26:14,093 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [39203665] [2022-11-22 01:26:14,093 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-22 01:26:14,093 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-11-22 01:26:14,094 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:26:14,094 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-11-22 01:26:14,095 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=191, Invalid=1531, Unknown=0, NotChecked=0, Total=1722 [2022-11-22 01:26:14,095 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) [2022-11-22 01:26:16,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:26:16,064 INFO L93 Difference]: Finished difference Result 115 states and 128 transitions. [2022-11-22 01:26:16,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-22 01:26:16,065 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 [2022-11-22 01:26:16,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:26:16,065 INFO L225 Difference]: With dead ends: 115 [2022-11-22 01:26:16,066 INFO L226 Difference]: Without dead ends: 115 [2022-11-22 01:26:16,066 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 34 SyntacticMatches, 2 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 722 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=389, Invalid=2367, Unknown=0, NotChecked=0, Total=2756 [2022-11-22 01:26:16,067 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 414 mSDsluCounter, 152 mSDsCounter, 0 mSdLazyCounter, 610 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 415 SdHoareTripleChecker+Valid, 183 SdHoareTripleChecker+Invalid, 627 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 610 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-22 01:26:16,067 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [415 Valid, 183 Invalid, 627 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 610 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-22 01:26:16,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2022-11-22 01:26:16,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 78. [2022-11-22 01:26:16,070 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) [2022-11-22 01:26:16,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 89 transitions. [2022-11-22 01:26:16,071 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 89 transitions. Word has length 27 [2022-11-22 01:26:16,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:26:16,071 INFO L495 AbstractCegarLoop]: Abstraction has 78 states and 89 transitions. [2022-11-22 01:26:16,071 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) [2022-11-22 01:26:16,071 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 89 transitions. [2022-11-22 01:26:16,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-11-22 01:26:16,072 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:26:16,072 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] [2022-11-22 01:26:16,082 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0dd9036d-146f-4358-9ac0-018e53d6ce12/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-22 01:26:16,272 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0dd9036d-146f-4358-9ac0-018e53d6ce12/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-11-22 01:26:16,273 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)] === [2022-11-22 01:26:16,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:26:16,273 INFO L85 PathProgramCache]: Analyzing trace with hash -2104618557, now seen corresponding path program 1 times [2022-11-22 01:26:16,273 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:26:16,273 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [928631795] [2022-11-22 01:26:16,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:26:16,273 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:26:16,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:26:16,342 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-22 01:26:16,343 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:26:16,343 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [928631795] [2022-11-22 01:26:16,343 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [928631795] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 01:26:16,343 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 01:26:16,343 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-22 01:26:16,343 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [130577176] [2022-11-22 01:26:16,344 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:26:16,344 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-22 01:26:16,344 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:26:16,344 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-22 01:26:16,345 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-22 01:26:16,345 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) [2022-11-22 01:26:16,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:26:16,440 INFO L93 Difference]: Finished difference Result 77 states and 88 transitions. [2022-11-22 01:26:16,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-22 01:26:16,440 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 [2022-11-22 01:26:16,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:26:16,441 INFO L225 Difference]: With dead ends: 77 [2022-11-22 01:26:16,441 INFO L226 Difference]: Without dead ends: 77 [2022-11-22 01:26:16,443 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 [2022-11-22 01:26:16,443 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 90 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s 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 [2022-11-22 01:26:16,444 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] [2022-11-22 01:26:16,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2022-11-22 01:26:16,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 77. [2022-11-22 01:26:16,446 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) [2022-11-22 01:26:16,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 88 transitions. [2022-11-22 01:26:16,447 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 88 transitions. Word has length 27 [2022-11-22 01:26:16,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:26:16,447 INFO L495 AbstractCegarLoop]: Abstraction has 77 states and 88 transitions. [2022-11-22 01:26:16,447 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) [2022-11-22 01:26:16,447 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 88 transitions. [2022-11-22 01:26:16,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-11-22 01:26:16,448 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:26:16,448 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] [2022-11-22 01:26:16,448 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-11-22 01:26:16,448 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)] === [2022-11-22 01:26:16,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:26:16,449 INFO L85 PathProgramCache]: Analyzing trace with hash -2104618556, now seen corresponding path program 1 times [2022-11-22 01:26:16,449 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:26:16,449 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [380193269] [2022-11-22 01:26:16,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:26:16,449 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:26:16,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:26:16,740 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-22 01:26:16,740 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:26:16,740 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [380193269] [2022-11-22 01:26:16,740 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [380193269] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 01:26:16,740 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1929284400] [2022-11-22 01:26:16,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:26:16,741 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:26:16,741 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0dd9036d-146f-4358-9ac0-018e53d6ce12/bin/utaipan-g80aRyZoba/z3 [2022-11-22 01:26:16,743 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0dd9036d-146f-4358-9ac0-018e53d6ce12/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 01:26:16,771 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0dd9036d-146f-4358-9ac0-018e53d6ce12/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-22 01:26:16,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:26:16,843 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-22 01:26:16,845 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:26:16,948 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-22 01:26:16,948 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 01:26:16,995 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 [2022-11-22 01:26:17,039 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-22 01:26:17,039 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1929284400] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 01:26:17,039 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1985116456] [2022-11-22 01:26:17,043 INFO L159 IcfgInterpreter]: Started Sifa with 23 locations of interest [2022-11-22 01:26:17,043 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 01:26:17,044 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 01:26:17,045 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 01:26:17,045 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 01:26:17,229 INFO L321 Elim1Store]: treesize reduction 54, result has 22.9 percent of original size [2022-11-22 01:26:17,229 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 [2022-11-22 01:26:17,356 INFO L321 Elim1Store]: treesize reduction 66, result has 19.5 percent of original size [2022-11-22 01:26:17,357 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 [2022-11-22 01:26:17,457 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2022-11-22 01:26:17,574 INFO L321 Elim1Store]: treesize reduction 66, result has 19.5 percent of original size [2022-11-22 01:26:17,574 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 [2022-11-22 01:26:17,844 INFO L321 Elim1Store]: treesize reduction 96, result has 17.9 percent of original size [2022-11-22 01:26:17,844 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 [2022-11-22 01:26:18,022 INFO L321 Elim1Store]: treesize reduction 182, result has 12.5 percent of original size [2022-11-22 01:26:18,023 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 [2022-11-22 01:26:18,252 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 [2022-11-22 01:26:18,269 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-22 01:26:18,439 INFO L321 Elim1Store]: treesize reduction 182, result has 12.5 percent of original size [2022-11-22 01:26:18,439 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 [2022-11-22 01:26:18,686 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 [2022-11-22 01:26:18,704 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-22 01:26:18,801 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:26:18,802 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 [2022-11-22 01:26:18,873 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:26:18,874 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 [2022-11-22 01:26:19,159 INFO L321 Elim1Store]: treesize reduction 31, result has 13.9 percent of original size [2022-11-22 01:26:19,159 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 [2022-11-22 01:26:19,182 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:26:19,183 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 [2022-11-22 01:26:19,972 INFO L321 Elim1Store]: treesize reduction 182, result has 12.5 percent of original size [2022-11-22 01:26:19,972 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 [2022-11-22 01:26:20,232 INFO L321 Elim1Store]: treesize reduction 66, result has 19.5 percent of original size [2022-11-22 01:26:20,232 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 [2022-11-22 01:26:20,364 INFO L197 IcfgInterpreter]: Interpreting procedure #Ultimate.meminit with input of size 25 for LOIs [2022-11-22 01:26:20,371 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 [2022-11-22 01:26:20,372 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 8 for LOIs [2022-11-22 01:26:20,374 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 01:26:28,782 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [1985116456] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 01:26:28,782 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-11-22 01:26:28,783 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [10, 6, 6] total 36 [2022-11-22 01:26:28,783 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1991991363] [2022-11-22 01:26:28,783 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:26:28,783 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-11-22 01:26:28,783 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:26:28,784 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-11-22 01:26:28,784 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=230, Invalid=1102, Unknown=0, NotChecked=0, Total=1332 [2022-11-22 01:26:28,784 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) [2022-11-22 01:26:30,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:26:30,905 INFO L93 Difference]: Finished difference Result 99 states and 111 transitions. [2022-11-22 01:26:30,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-22 01:26:30,906 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 [2022-11-22 01:26:30,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:26:30,906 INFO L225 Difference]: With dead ends: 99 [2022-11-22 01:26:30,907 INFO L226 Difference]: Without dead ends: 99 [2022-11-22 01:26:30,907 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 51 SyntacticMatches, 4 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 471 ImplicationChecksByTransitivity, 8.6s TimeCoverageRelationStatistics Valid=230, Invalid=1102, Unknown=0, NotChecked=0, Total=1332 [2022-11-22 01:26:30,908 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 111 mSDsluCounter, 129 mSDsCounter, 0 mSdLazyCounter, 820 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 159 SdHoareTripleChecker+Invalid, 833 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 820 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-11-22 01:26:30,908 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [114 Valid, 159 Invalid, 833 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 820 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2022-11-22 01:26:30,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2022-11-22 01:26:30,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 91. [2022-11-22 01:26:30,911 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) [2022-11-22 01:26:30,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 108 transitions. [2022-11-22 01:26:30,912 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 108 transitions. Word has length 27 [2022-11-22 01:26:30,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:26:30,912 INFO L495 AbstractCegarLoop]: Abstraction has 91 states and 108 transitions. [2022-11-22 01:26:30,913 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) [2022-11-22 01:26:30,913 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 108 transitions. [2022-11-22 01:26:30,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-11-22 01:26:30,913 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:26:30,914 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] [2022-11-22 01:26:30,928 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0dd9036d-146f-4358-9ac0-018e53d6ce12/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-22 01:26:31,123 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0dd9036d-146f-4358-9ac0-018e53d6ce12/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-11-22 01:26:31,123 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)] === [2022-11-22 01:26:31,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:26:31,124 INFO L85 PathProgramCache]: Analyzing trace with hash -748476946, now seen corresponding path program 1 times [2022-11-22 01:26:31,124 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:26:31,124 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1349860325] [2022-11-22 01:26:31,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:26:31,125 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:26:31,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:26:31,354 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-22 01:26:31,354 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:26:31,354 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1349860325] [2022-11-22 01:26:31,354 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1349860325] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 01:26:31,354 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [696121393] [2022-11-22 01:26:31,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:26:31,354 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:26:31,355 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0dd9036d-146f-4358-9ac0-018e53d6ce12/bin/utaipan-g80aRyZoba/z3 [2022-11-22 01:26:31,356 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0dd9036d-146f-4358-9ac0-018e53d6ce12/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 01:26:31,379 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0dd9036d-146f-4358-9ac0-018e53d6ce12/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-22 01:26:31,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:26:31,447 INFO L263 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-22 01:26:31,449 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:26:31,595 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-22 01:26:31,596 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 01:26:31,676 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 [2022-11-22 01:26:31,755 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-22 01:26:31,755 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [696121393] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 01:26:31,755 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [725323461] [2022-11-22 01:26:31,757 INFO L159 IcfgInterpreter]: Started Sifa with 21 locations of interest [2022-11-22 01:26:31,757 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 01:26:31,757 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 01:26:31,758 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 01:26:31,758 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 01:26:32,017 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-11-22 01:26:32,024 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 [2022-11-22 01:26:32,069 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 [2022-11-22 01:26:32,162 INFO L321 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2022-11-22 01:26:32,163 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 [2022-11-22 01:26:32,192 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-22 01:26:32,193 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 [2022-11-22 01:26:32,300 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 [2022-11-22 01:26:32,311 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-22 01:26:32,392 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 [2022-11-22 01:26:32,404 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-22 01:26:32,462 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 [2022-11-22 01:26:32,595 INFO L321 Elim1Store]: treesize reduction 84, result has 9.7 percent of original size [2022-11-22 01:26:32,596 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 [2022-11-22 01:26:32,675 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:26:32,688 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-22 01:26:32,691 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 [2022-11-22 01:26:32,719 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:26:32,733 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-22 01:26:32,733 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 [2022-11-22 01:26:33,010 INFO L197 IcfgInterpreter]: Interpreting procedure #Ultimate.meminit with input of size 70 for LOIs [2022-11-22 01:26:33,044 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 8 for LOIs [2022-11-22 01:26:33,045 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 01:26:37,102 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [725323461] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 01:26:37,102 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-11-22 01:26:37,103 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [9, 8, 8] total 39 [2022-11-22 01:26:37,103 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [623878172] [2022-11-22 01:26:37,103 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:26:37,103 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-11-22 01:26:37,104 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:26:37,104 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-11-22 01:26:37,105 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=229, Invalid=1331, Unknown=0, NotChecked=0, Total=1560 [2022-11-22 01:26:37,105 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) [2022-11-22 01:26:42,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:26:42,019 INFO L93 Difference]: Finished difference Result 152 states and 178 transitions. [2022-11-22 01:26:42,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-11-22 01:26:42,020 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 [2022-11-22 01:26:42,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:26:42,020 INFO L225 Difference]: With dead ends: 152 [2022-11-22 01:26:42,020 INFO L226 Difference]: Without dead ends: 152 [2022-11-22 01:26:42,021 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 53 SyntacticMatches, 3 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 763 ImplicationChecksByTransitivity, 7.9s TimeCoverageRelationStatistics Valid=446, Invalid=2206, Unknown=0, NotChecked=0, Total=2652 [2022-11-22 01:26:42,021 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 443 mSDsluCounter, 110 mSDsCounter, 0 mSdLazyCounter, 751 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 445 SdHoareTripleChecker+Valid, 125 SdHoareTripleChecker+Invalid, 774 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 751 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-11-22 01:26:42,021 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [445 Valid, 125 Invalid, 774 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 751 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-11-22 01:26:42,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2022-11-22 01:26:42,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 101. [2022-11-22 01:26:42,024 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) [2022-11-22 01:26:42,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 123 transitions. [2022-11-22 01:26:42,025 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 123 transitions. Word has length 29 [2022-11-22 01:26:42,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:26:42,026 INFO L495 AbstractCegarLoop]: Abstraction has 101 states and 123 transitions. [2022-11-22 01:26:42,026 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) [2022-11-22 01:26:42,026 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 123 transitions. [2022-11-22 01:26:42,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-11-22 01:26:42,027 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:26:42,027 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] [2022-11-22 01:26:42,044 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0dd9036d-146f-4358-9ac0-018e53d6ce12/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-22 01:26:42,233 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0dd9036d-146f-4358-9ac0-018e53d6ce12/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-11-22 01:26:42,233 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)] === [2022-11-22 01:26:42,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:26:42,234 INFO L85 PathProgramCache]: Analyzing trace with hash 391229284, now seen corresponding path program 1 times [2022-11-22 01:26:42,234 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:26:42,234 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [159463485] [2022-11-22 01:26:42,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:26:42,234 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:26:42,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:26:42,639 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-22 01:26:42,640 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:26:42,640 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [159463485] [2022-11-22 01:26:42,640 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [159463485] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 01:26:42,640 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [310311376] [2022-11-22 01:26:42,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:26:42,640 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:26:42,640 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0dd9036d-146f-4358-9ac0-018e53d6ce12/bin/utaipan-g80aRyZoba/z3 [2022-11-22 01:26:42,643 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0dd9036d-146f-4358-9ac0-018e53d6ce12/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 01:26:42,647 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0dd9036d-146f-4358-9ac0-018e53d6ce12/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-22 01:26:42,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:26:42,734 INFO L263 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 50 conjunts are in the unsatisfiable core [2022-11-22 01:26:42,740 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:26:42,778 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-22 01:26:42,831 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 6 [2022-11-22 01:26:42,902 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-22 01:26:42,902 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-11-22 01:26:42,952 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 [2022-11-22 01:26:42,958 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 [2022-11-22 01:26:42,996 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 [2022-11-22 01:26:43,054 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 [2022-11-22 01:26:43,117 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 [2022-11-22 01:26:43,145 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 1 not checked. [2022-11-22 01:26:43,146 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 01:27:03,244 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 [2022-11-22 01:27:07,663 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_241 (Array Int Int))) (= ((as const (Array Int Int)) 0) (select (store |c_#memory_int| |c_ULTIMATE.start_main_#t~malloc16#1.base| v_ArrVal_241) |c_ULTIMATE.start_main_~a~0#1.base|))) is different from false [2022-11-22 01:27:07,682 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [310311376] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 01:27:07,682 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [404981338] [2022-11-22 01:27:07,684 INFO L159 IcfgInterpreter]: Started Sifa with 25 locations of interest [2022-11-22 01:27:07,684 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 01:27:07,684 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 01:27:07,684 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 01:27:07,685 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 01:27:07,859 INFO L321 Elim1Store]: treesize reduction 54, result has 22.9 percent of original size [2022-11-22 01:27:07,860 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 [2022-11-22 01:27:07,972 INFO L321 Elim1Store]: treesize reduction 66, result has 19.5 percent of original size [2022-11-22 01:27:07,973 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 [2022-11-22 01:27:08,067 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 6 [2022-11-22 01:27:08,185 INFO L321 Elim1Store]: treesize reduction 66, result has 19.5 percent of original size [2022-11-22 01:27:08,185 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 [2022-11-22 01:27:08,450 INFO L321 Elim1Store]: treesize reduction 96, result has 17.9 percent of original size [2022-11-22 01:27:08,451 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 [2022-11-22 01:27:08,635 INFO L321 Elim1Store]: treesize reduction 182, result has 12.5 percent of original size [2022-11-22 01:27:08,636 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 [2022-11-22 01:27:08,880 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 [2022-11-22 01:27:08,897 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-22 01:27:09,036 INFO L321 Elim1Store]: treesize reduction 182, result has 12.5 percent of original size [2022-11-22 01:27:09,036 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 [2022-11-22 01:27:09,268 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 [2022-11-22 01:27:09,286 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-22 01:27:09,371 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:27:09,373 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 [2022-11-22 01:27:09,432 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:27:09,433 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 [2022-11-22 01:27:09,649 INFO L321 Elim1Store]: treesize reduction 31, result has 13.9 percent of original size [2022-11-22 01:27:09,649 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 [2022-11-22 01:27:09,670 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:27:09,671 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 [2022-11-22 01:27:10,499 INFO L321 Elim1Store]: treesize reduction 182, result has 12.5 percent of original size [2022-11-22 01:27:10,500 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 [2022-11-22 01:27:10,769 INFO L321 Elim1Store]: treesize reduction 66, result has 19.5 percent of original size [2022-11-22 01:27:10,769 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 [2022-11-22 01:27:10,910 INFO L197 IcfgInterpreter]: Interpreting procedure #Ultimate.meminit with input of size 25 for LOIs [2022-11-22 01:27:10,916 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2022-11-22 01:27:10,918 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 8 for LOIs [2022-11-22 01:27:10,919 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 01:27:21,473 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [404981338] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 01:27:21,473 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-22 01:27:21,474 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [13, 16] total 48 [2022-11-22 01:27:21,474 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [568464669] [2022-11-22 01:27:21,474 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:27:21,474 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-11-22 01:27:21,474 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:27:21,475 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-11-22 01:27:21,476 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=277, Invalid=2164, Unknown=21, NotChecked=294, Total=2756 [2022-11-22 01:27:21,476 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) [2022-11-22 01:27:23,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:27:23,471 INFO L93 Difference]: Finished difference Result 114 states and 136 transitions. [2022-11-22 01:27:23,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-11-22 01:27:23,472 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 [2022-11-22 01:27:23,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:27:23,473 INFO L225 Difference]: With dead ends: 114 [2022-11-22 01:27:23,473 INFO L226 Difference]: Without dead ends: 114 [2022-11-22 01:27:23,474 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 30 SyntacticMatches, 3 SemanticMatches, 51 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 664 ImplicationChecksByTransitivity, 35.4s TimeCoverageRelationStatistics Valid=277, Invalid=2164, Unknown=21, NotChecked=294, Total=2756 [2022-11-22 01:27:23,474 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 129 mSDsluCounter, 115 mSDsCounter, 0 mSdLazyCounter, 769 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 132 SdHoareTripleChecker+Valid, 144 SdHoareTripleChecker+Invalid, 780 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 769 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-11-22 01:27:23,475 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [132 Valid, 144 Invalid, 780 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 769 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2022-11-22 01:27:23,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2022-11-22 01:27:23,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 101. [2022-11-22 01:27:23,479 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) [2022-11-22 01:27:23,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 122 transitions. [2022-11-22 01:27:23,480 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 122 transitions. Word has length 29 [2022-11-22 01:27:23,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:27:23,480 INFO L495 AbstractCegarLoop]: Abstraction has 101 states and 122 transitions. [2022-11-22 01:27:23,480 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) [2022-11-22 01:27:23,480 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 122 transitions. [2022-11-22 01:27:23,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-11-22 01:27:23,481 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:27:23,481 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] [2022-11-22 01:27:23,491 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0dd9036d-146f-4358-9ac0-018e53d6ce12/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-22 01:27:23,687 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0dd9036d-146f-4358-9ac0-018e53d6ce12/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-11-22 01:27:23,688 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)] === [2022-11-22 01:27:23,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:27:23,688 INFO L85 PathProgramCache]: Analyzing trace with hash -1869919005, now seen corresponding path program 1 times [2022-11-22 01:27:23,688 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:27:23,689 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1459476152] [2022-11-22 01:27:23,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:27:23,689 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:27:23,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:27:23,822 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-22 01:27:23,823 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:27:23,823 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1459476152] [2022-11-22 01:27:23,823 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1459476152] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 01:27:23,823 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [223677023] [2022-11-22 01:27:23,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:27:23,824 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:27:23,824 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0dd9036d-146f-4358-9ac0-018e53d6ce12/bin/utaipan-g80aRyZoba/z3 [2022-11-22 01:27:23,827 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0dd9036d-146f-4358-9ac0-018e53d6ce12/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 01:27:23,855 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0dd9036d-146f-4358-9ac0-018e53d6ce12/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-22 01:27:23,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:27:23,928 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-22 01:27:23,929 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:27:23,968 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-22 01:27:23,969 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 01:27:24,024 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-22 01:27:24,024 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [223677023] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 01:27:24,024 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [288004256] [2022-11-22 01:27:24,026 INFO L159 IcfgInterpreter]: Started Sifa with 23 locations of interest [2022-11-22 01:27:24,026 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 01:27:24,027 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 01:27:24,027 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 01:27:24,027 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 01:27:24,271 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 [2022-11-22 01:27:24,278 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-11-22 01:27:24,319 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 6 [2022-11-22 01:27:24,411 INFO L321 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2022-11-22 01:27:24,411 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 1 case distinctions, treesize of input 127 treesize of output 127 [2022-11-22 01:27:24,445 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-22 01:27:24,445 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 [2022-11-22 01:27:24,537 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 [2022-11-22 01:27:24,548 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-22 01:27:24,629 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 [2022-11-22 01:27:24,641 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-22 01:27:24,738 INFO L321 Elim1Store]: treesize reduction 28, result has 15.2 percent of original size [2022-11-22 01:27:24,739 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 200 treesize of output 196 [2022-11-22 01:27:24,818 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:27:24,830 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-22 01:27:24,830 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 [2022-11-22 01:27:24,856 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:27:24,868 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-22 01:27:24,869 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 [2022-11-22 01:27:24,947 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2022-11-22 01:27:25,106 INFO L197 IcfgInterpreter]: Interpreting procedure #Ultimate.meminit with input of size 70 for LOIs [2022-11-22 01:27:25,132 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 8 for LOIs [2022-11-22 01:27:25,134 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 01:27:28,800 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [288004256] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 01:27:28,800 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-11-22 01:27:28,800 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [7, 6, 6] total 30 [2022-11-22 01:27:28,800 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1593616913] [2022-11-22 01:27:28,801 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:27:28,801 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-11-22 01:27:28,801 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:27:28,801 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-11-22 01:27:28,802 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=748, Unknown=0, NotChecked=0, Total=870 [2022-11-22 01:27:28,802 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) [2022-11-22 01:27:34,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:27:34,083 INFO L93 Difference]: Finished difference Result 172 states and 200 transitions. [2022-11-22 01:27:34,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-11-22 01:27:34,083 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 [2022-11-22 01:27:34,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:27:34,085 INFO L225 Difference]: With dead ends: 172 [2022-11-22 01:27:34,085 INFO L226 Difference]: Without dead ends: 172 [2022-11-22 01:27:34,085 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 66 SyntacticMatches, 5 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 343 ImplicationChecksByTransitivity, 7.9s TimeCoverageRelationStatistics Valid=324, Invalid=1656, Unknown=0, NotChecked=0, Total=1980 [2022-11-22 01:27:34,086 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 518 mSDsluCounter, 106 mSDsCounter, 0 mSdLazyCounter, 682 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 520 SdHoareTripleChecker+Valid, 122 SdHoareTripleChecker+Invalid, 710 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 682 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-11-22 01:27:34,086 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [520 Valid, 122 Invalid, 710 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 682 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-11-22 01:27:34,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2022-11-22 01:27:34,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 109. [2022-11-22 01:27:34,090 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) [2022-11-22 01:27:34,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 134 transitions. [2022-11-22 01:27:34,091 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 134 transitions. Word has length 31 [2022-11-22 01:27:34,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:27:34,092 INFO L495 AbstractCegarLoop]: Abstraction has 109 states and 134 transitions. [2022-11-22 01:27:34,092 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) [2022-11-22 01:27:34,092 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 134 transitions. [2022-11-22 01:27:34,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-11-22 01:27:34,093 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:27:34,093 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] [2022-11-22 01:27:34,099 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0dd9036d-146f-4358-9ac0-018e53d6ce12/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2022-11-22 01:27:34,298 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0dd9036d-146f-4358-9ac0-018e53d6ce12/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:27:34,298 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)] === [2022-11-22 01:27:34,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:27:34,298 INFO L85 PathProgramCache]: Analyzing trace with hash -1425596276, now seen corresponding path program 1 times [2022-11-22 01:27:34,298 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:27:34,299 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [247164342] [2022-11-22 01:27:34,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:27:34,299 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:27:34,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:27:34,431 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-22 01:27:34,432 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:27:34,432 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [247164342] [2022-11-22 01:27:34,432 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [247164342] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 01:27:34,432 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [42174594] [2022-11-22 01:27:34,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:27:34,432 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:27:34,433 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0dd9036d-146f-4358-9ac0-018e53d6ce12/bin/utaipan-g80aRyZoba/z3 [2022-11-22 01:27:34,434 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0dd9036d-146f-4358-9ac0-018e53d6ce12/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 01:27:34,461 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0dd9036d-146f-4358-9ac0-018e53d6ce12/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-22 01:27:34,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:27:34,544 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-22 01:27:34,546 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:27:34,611 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-22 01:27:34,611 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 01:27:34,673 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-22 01:27:34,674 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [42174594] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 01:27:34,674 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1072934135] [2022-11-22 01:27:34,680 INFO L159 IcfgInterpreter]: Started Sifa with 26 locations of interest [2022-11-22 01:27:34,681 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 01:27:34,682 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 01:27:34,682 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 01:27:34,682 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 01:27:34,855 INFO L321 Elim1Store]: treesize reduction 54, result has 22.9 percent of original size [2022-11-22 01:27:34,856 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 [2022-11-22 01:27:34,976 INFO L321 Elim1Store]: treesize reduction 66, result has 19.5 percent of original size [2022-11-22 01:27:34,977 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 [2022-11-22 01:27:35,087 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2022-11-22 01:27:35,189 INFO L321 Elim1Store]: treesize reduction 66, result has 19.5 percent of original size [2022-11-22 01:27:35,189 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 [2022-11-22 01:27:35,441 INFO L321 Elim1Store]: treesize reduction 96, result has 17.9 percent of original size [2022-11-22 01:27:35,441 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 [2022-11-22 01:27:35,622 INFO L321 Elim1Store]: treesize reduction 182, result has 12.5 percent of original size [2022-11-22 01:27:35,623 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 [2022-11-22 01:27:35,835 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 [2022-11-22 01:27:35,854 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-22 01:27:35,987 INFO L321 Elim1Store]: treesize reduction 182, result has 12.5 percent of original size [2022-11-22 01:27:35,988 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 [2022-11-22 01:27:36,204 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 [2022-11-22 01:27:36,221 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-22 01:27:36,370 INFO L321 Elim1Store]: treesize reduction 28, result has 15.2 percent of original size [2022-11-22 01:27:36,371 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 [2022-11-22 01:27:36,515 INFO L321 Elim1Store]: treesize reduction 28, result has 15.2 percent of original size [2022-11-22 01:27:36,515 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 2 new quantified variables, introduced 3 case distinctions, treesize of input 330 treesize of output 326 [2022-11-22 01:27:36,636 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2022-11-22 01:27:37,534 INFO L321 Elim1Store]: treesize reduction 182, result has 12.5 percent of original size [2022-11-22 01:27:37,534 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 [2022-11-22 01:27:37,785 INFO L321 Elim1Store]: treesize reduction 66, result has 19.5 percent of original size [2022-11-22 01:27:37,785 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 [2022-11-22 01:27:37,920 INFO L197 IcfgInterpreter]: Interpreting procedure #Ultimate.meminit with input of size 25 for LOIs [2022-11-22 01:27:37,926 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2022-11-22 01:27:37,927 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 8 for LOIs [2022-11-22 01:27:37,928 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 01:27:47,579 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [1072934135] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 01:27:47,580 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-11-22 01:27:47,580 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [8, 7, 7] total 35 [2022-11-22 01:27:47,580 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1273613756] [2022-11-22 01:27:47,580 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:27:47,580 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-11-22 01:27:47,580 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:27:47,581 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-11-22 01:27:47,581 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=186, Invalid=1004, Unknown=0, NotChecked=0, Total=1190 [2022-11-22 01:27:47,581 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) [2022-11-22 01:27:49,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:27:49,054 INFO L93 Difference]: Finished difference Result 126 states and 151 transitions. [2022-11-22 01:27:49,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-11-22 01:27:49,055 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 [2022-11-22 01:27:49,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:27:49,056 INFO L225 Difference]: With dead ends: 126 [2022-11-22 01:27:49,056 INFO L226 Difference]: Without dead ends: 126 [2022-11-22 01:27:49,056 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 64 SyntacticMatches, 6 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 335 ImplicationChecksByTransitivity, 9.7s TimeCoverageRelationStatistics Valid=186, Invalid=1004, Unknown=0, NotChecked=0, Total=1190 [2022-11-22 01:27:49,057 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 139 mSDsluCounter, 157 mSDsCounter, 0 mSdLazyCounter, 827 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 142 SdHoareTripleChecker+Valid, 186 SdHoareTripleChecker+Invalid, 839 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 827 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-11-22 01:27:49,057 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [142 Valid, 186 Invalid, 839 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 827 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-11-22 01:27:49,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2022-11-22 01:27:49,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 114. [2022-11-22 01:27:49,060 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) [2022-11-22 01:27:49,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 142 transitions. [2022-11-22 01:27:49,061 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 142 transitions. Word has length 32 [2022-11-22 01:27:49,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:27:49,061 INFO L495 AbstractCegarLoop]: Abstraction has 114 states and 142 transitions. [2022-11-22 01:27:49,062 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) [2022-11-22 01:27:49,062 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 142 transitions. [2022-11-22 01:27:49,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-11-22 01:27:49,062 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:27:49,062 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] [2022-11-22 01:27:49,073 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0dd9036d-146f-4358-9ac0-018e53d6ce12/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2022-11-22 01:27:49,268 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0dd9036d-146f-4358-9ac0-018e53d6ce12/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:27:49,268 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)] === [2022-11-22 01:27:49,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:27:49,268 INFO L85 PathProgramCache]: Analyzing trace with hash -2140677764, now seen corresponding path program 1 times [2022-11-22 01:27:49,268 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:27:49,269 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [132766970] [2022-11-22 01:27:49,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:27:49,269 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:27:49,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:27:49,427 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-22 01:27:49,428 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:27:49,428 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [132766970] [2022-11-22 01:27:49,428 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [132766970] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 01:27:49,428 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [423024768] [2022-11-22 01:27:49,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:27:49,428 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:27:49,429 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0dd9036d-146f-4358-9ac0-018e53d6ce12/bin/utaipan-g80aRyZoba/z3 [2022-11-22 01:27:49,430 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0dd9036d-146f-4358-9ac0-018e53d6ce12/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 01:27:49,455 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0dd9036d-146f-4358-9ac0-018e53d6ce12/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-22 01:27:49,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:27:49,532 INFO L263 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-22 01:27:49,533 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:27:49,620 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-22 01:27:49,620 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 01:27:49,697 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-22 01:27:49,697 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [423024768] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 01:27:49,697 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1839626818] [2022-11-22 01:27:49,698 INFO L159 IcfgInterpreter]: Started Sifa with 23 locations of interest [2022-11-22 01:27:49,699 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 01:27:49,699 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 01:27:49,699 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 01:27:49,699 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 01:27:49,962 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 [2022-11-22 01:27:49,975 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-11-22 01:27:50,019 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2022-11-22 01:27:50,108 INFO L321 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2022-11-22 01:27:50,108 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 [2022-11-22 01:27:50,134 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-22 01:27:50,135 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 [2022-11-22 01:27:50,246 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 [2022-11-22 01:27:50,258 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-22 01:27:50,338 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 [2022-11-22 01:27:50,349 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-22 01:27:50,408 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 [2022-11-22 01:27:50,504 INFO L321 Elim1Store]: treesize reduction 84, result has 9.7 percent of original size [2022-11-22 01:27:50,504 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 [2022-11-22 01:27:50,583 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:27:50,595 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-22 01:27:50,595 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 [2022-11-22 01:27:50,618 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:27:50,630 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-22 01:27:50,630 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 [2022-11-22 01:27:50,873 INFO L321 Elim1Store]: treesize reduction 76, result has 31.5 percent of original size [2022-11-22 01:27:50,874 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 [2022-11-22 01:27:51,178 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:27:51,179 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:27:51,180 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:27:51,181 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:27:51,211 INFO L321 Elim1Store]: treesize reduction 28, result has 60.6 percent of original size [2022-11-22 01:27:51,211 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 [2022-11-22 01:27:51,258 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:27:51,259 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:27:51,261 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:27:51,261 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:27:51,296 INFO L321 Elim1Store]: treesize reduction 28, result has 60.6 percent of original size [2022-11-22 01:27:51,297 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 [2022-11-22 01:27:51,515 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:27:51,516 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:27:51,561 INFO L321 Elim1Store]: treesize reduction 28, result has 60.6 percent of original size [2022-11-22 01:27:51,561 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 [2022-11-22 01:27:51,685 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:27:51,688 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:27:51,744 INFO L321 Elim1Store]: treesize reduction 28, result has 60.6 percent of original size [2022-11-22 01:27:51,744 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 [2022-11-22 01:27:51,960 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:27:51,961 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 [2022-11-22 01:27:52,106 INFO L197 IcfgInterpreter]: Interpreting procedure #Ultimate.meminit with input of size 70 for LOIs [2022-11-22 01:27:52,131 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 8 for LOIs [2022-11-22 01:27:52,132 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 01:27:56,526 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 [2022-11-22 01:27:56,526 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-22 01:27:56,526 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-22 01:27:56,526 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 16 [2022-11-22 01:27:56,526 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [558572937] [2022-11-22 01:27:56,526 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-22 01:27:56,527 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-22 01:27:56,527 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:27:56,527 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-22 01:27:56,528 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=1259, Unknown=0, NotChecked=0, Total=1406 [2022-11-22 01:27:56,528 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) [2022-11-22 01:27:56,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:27:56,974 INFO L93 Difference]: Finished difference Result 282 states and 333 transitions. [2022-11-22 01:27:56,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-22 01:27:56,979 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 [2022-11-22 01:27:56,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:27:56,981 INFO L225 Difference]: With dead ends: 282 [2022-11-22 01:27:56,981 INFO L226 Difference]: Without dead ends: 282 [2022-11-22 01:27:56,982 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 68 SyntacticMatches, 3 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 578 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=219, Invalid=1851, Unknown=0, NotChecked=0, Total=2070 [2022-11-22 01:27:56,982 INFO L413 NwaCegarLoop]: 60 mSDtfsCounter, 669 mSDsluCounter, 537 mSDsCounter, 0 mSdLazyCounter, 355 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 672 SdHoareTripleChecker+Valid, 597 SdHoareTripleChecker+Invalid, 374 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 355 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-22 01:27:56,983 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [672 Valid, 597 Invalid, 374 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 355 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-22 01:27:56,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 282 states. [2022-11-22 01:27:56,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 282 to 131. [2022-11-22 01:27:56,988 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) [2022-11-22 01:27:56,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 168 transitions. [2022-11-22 01:27:56,989 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 168 transitions. Word has length 33 [2022-11-22 01:27:56,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:27:56,989 INFO L495 AbstractCegarLoop]: Abstraction has 131 states and 168 transitions. [2022-11-22 01:27:56,989 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) [2022-11-22 01:27:56,989 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 168 transitions. [2022-11-22 01:27:56,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-11-22 01:27:56,990 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:27:56,990 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] [2022-11-22 01:27:57,003 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0dd9036d-146f-4358-9ac0-018e53d6ce12/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-11-22 01:27:57,199 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0dd9036d-146f-4358-9ac0-018e53d6ce12/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:27:57,200 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)] === [2022-11-22 01:27:57,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:27:57,200 INFO L85 PathProgramCache]: Analyzing trace with hash -1695768893, now seen corresponding path program 1 times [2022-11-22 01:27:57,200 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:27:57,200 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1607789823] [2022-11-22 01:27:57,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:27:57,201 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:27:57,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:27:57,410 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-22 01:27:57,411 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:27:57,411 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1607789823] [2022-11-22 01:27:57,411 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1607789823] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 01:27:57,411 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [183692788] [2022-11-22 01:27:57,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:27:57,411 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:27:57,412 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0dd9036d-146f-4358-9ac0-018e53d6ce12/bin/utaipan-g80aRyZoba/z3 [2022-11-22 01:27:57,413 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0dd9036d-146f-4358-9ac0-018e53d6ce12/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 01:27:57,444 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0dd9036d-146f-4358-9ac0-018e53d6ce12/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-11-22 01:27:57,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:27:57,526 INFO L263 TraceCheckSpWp]: Trace formula consists of 245 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-22 01:27:57,527 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:27:57,562 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-22 01:27:57,563 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 01:27:57,608 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-22 01:27:57,608 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [183692788] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 01:27:57,608 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1022436046] [2022-11-22 01:27:57,610 INFO L159 IcfgInterpreter]: Started Sifa with 25 locations of interest [2022-11-22 01:27:57,610 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 01:27:57,610 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 01:27:57,610 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 01:27:57,610 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 01:27:57,850 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-11-22 01:27:57,857 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 [2022-11-22 01:27:57,899 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2022-11-22 01:27:57,984 INFO L321 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2022-11-22 01:27:57,984 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 [2022-11-22 01:27:58,013 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-22 01:27:58,013 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 [2022-11-22 01:27:58,129 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 [2022-11-22 01:27:58,140 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-22 01:27:58,230 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 [2022-11-22 01:27:58,248 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-22 01:27:58,300 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 [2022-11-22 01:27:58,409 INFO L321 Elim1Store]: treesize reduction 84, result has 9.7 percent of original size [2022-11-22 01:27:58,410 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 [2022-11-22 01:27:58,493 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:27:58,505 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-22 01:27:58,506 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-22 01:27:58,530 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:27:58,542 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-22 01:27:58,542 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 [2022-11-22 01:27:58,734 INFO L321 Elim1Store]: treesize reduction 44, result has 44.3 percent of original size [2022-11-22 01:27:58,734 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 [2022-11-22 01:27:59,048 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:27:59,072 INFO L321 Elim1Store]: treesize reduction 26, result has 48.0 percent of original size [2022-11-22 01:27:59,073 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 [2022-11-22 01:27:59,141 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:27:59,171 INFO L321 Elim1Store]: treesize reduction 26, result has 48.0 percent of original size [2022-11-22 01:27:59,172 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 [2022-11-22 01:27:59,336 INFO L321 Elim1Store]: treesize reduction 26, result has 48.0 percent of original size [2022-11-22 01:27:59,336 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 [2022-11-22 01:27:59,450 INFO L321 Elim1Store]: treesize reduction 39, result has 22.0 percent of original size [2022-11-22 01:27:59,451 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 [2022-11-22 01:28:00,642 INFO L197 IcfgInterpreter]: Interpreting procedure #Ultimate.meminit with input of size 70 for LOIs [2022-11-22 01:28:00,666 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 8 for LOIs [2022-11-22 01:28:00,667 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 01:28:08,305 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [1022436046] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 01:28:08,305 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-11-22 01:28:08,305 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [7, 6, 6] total 31 [2022-11-22 01:28:08,306 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [63973384] [2022-11-22 01:28:08,306 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:28:08,306 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-11-22 01:28:08,306 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:28:08,307 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-11-22 01:28:08,307 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=805, Unknown=0, NotChecked=0, Total=930 [2022-11-22 01:28:08,307 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) [2022-11-22 01:28:15,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:28:15,840 INFO L93 Difference]: Finished difference Result 186 states and 236 transitions. [2022-11-22 01:28:15,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-11-22 01:28:15,841 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 [2022-11-22 01:28:15,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:28:15,842 INFO L225 Difference]: With dead ends: 186 [2022-11-22 01:28:15,843 INFO L226 Difference]: Without dead ends: 186 [2022-11-22 01:28:15,843 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 72 SyntacticMatches, 4 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 341 ImplicationChecksByTransitivity, 13.6s TimeCoverageRelationStatistics Valid=318, Invalid=1662, Unknown=0, NotChecked=0, Total=1980 [2022-11-22 01:28:15,844 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 381 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 815 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 383 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 840 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 815 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-11-22 01:28:15,844 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [383 Valid, 100 Invalid, 840 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 815 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-11-22 01:28:15,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2022-11-22 01:28:15,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 134. [2022-11-22 01:28:15,848 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) [2022-11-22 01:28:15,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 171 transitions. [2022-11-22 01:28:15,849 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 171 transitions. Word has length 33 [2022-11-22 01:28:15,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:28:15,849 INFO L495 AbstractCegarLoop]: Abstraction has 134 states and 171 transitions. [2022-11-22 01:28:15,850 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) [2022-11-22 01:28:15,850 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 171 transitions. [2022-11-22 01:28:15,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-11-22 01:28:15,850 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:28:15,851 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 01:28:15,863 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0dd9036d-146f-4358-9ac0-018e53d6ce12/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2022-11-22 01:28:16,056 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0dd9036d-146f-4358-9ac0-018e53d6ce12/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:28:16,057 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)] === [2022-11-22 01:28:16,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:28:16,057 INFO L85 PathProgramCache]: Analyzing trace with hash 102581881, now seen corresponding path program 1 times [2022-11-22 01:28:16,057 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:28:16,057 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1555745689] [2022-11-22 01:28:16,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:28:16,057 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:28:16,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:28:16,192 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-22 01:28:16,193 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:28:16,193 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1555745689] [2022-11-22 01:28:16,193 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1555745689] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 01:28:16,193 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1695613450] [2022-11-22 01:28:16,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:28:16,193 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:28:16,194 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0dd9036d-146f-4358-9ac0-018e53d6ce12/bin/utaipan-g80aRyZoba/z3 [2022-11-22 01:28:16,195 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0dd9036d-146f-4358-9ac0-018e53d6ce12/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 01:28:16,223 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0dd9036d-146f-4358-9ac0-018e53d6ce12/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-11-22 01:28:16,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:28:16,301 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-22 01:28:16,302 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:28:16,360 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-22 01:28:16,360 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 01:28:16,422 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-22 01:28:16,423 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1695613450] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 01:28:16,423 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [153695895] [2022-11-22 01:28:16,424 INFO L159 IcfgInterpreter]: Started Sifa with 23 locations of interest [2022-11-22 01:28:16,424 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 01:28:16,425 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 01:28:16,425 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 01:28:16,425 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 01:28:16,682 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 [2022-11-22 01:28:16,696 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-11-22 01:28:16,737 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 [2022-11-22 01:28:16,820 INFO L321 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2022-11-22 01:28:16,820 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 [2022-11-22 01:28:16,846 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-22 01:28:16,847 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 [2022-11-22 01:28:16,936 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 [2022-11-22 01:28:16,947 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-22 01:28:17,023 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 [2022-11-22 01:28:17,034 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-22 01:28:17,099 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 [2022-11-22 01:28:17,225 INFO L321 Elim1Store]: treesize reduction 84, result has 9.7 percent of original size [2022-11-22 01:28:17,225 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 [2022-11-22 01:28:17,310 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:28:17,322 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-22 01:28:17,322 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 [2022-11-22 01:28:17,349 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:28:17,361 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-22 01:28:17,361 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 [2022-11-22 01:28:17,662 INFO L321 Elim1Store]: treesize reduction 76, result has 31.5 percent of original size [2022-11-22 01:28:17,663 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 [2022-11-22 01:28:17,948 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:28:17,950 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:28:17,951 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:28:17,951 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:28:17,982 INFO L321 Elim1Store]: treesize reduction 28, result has 60.6 percent of original size [2022-11-22 01:28:17,983 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 [2022-11-22 01:28:18,053 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:28:18,055 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:28:18,056 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:28:18,057 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:28:18,096 INFO L321 Elim1Store]: treesize reduction 28, result has 60.6 percent of original size [2022-11-22 01:28:18,097 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 [2022-11-22 01:28:18,195 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:28:18,197 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:28:18,230 INFO L321 Elim1Store]: treesize reduction 28, result has 60.6 percent of original size [2022-11-22 01:28:18,230 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 [2022-11-22 01:28:18,335 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:28:18,337 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:28:18,388 INFO L321 Elim1Store]: treesize reduction 28, result has 60.6 percent of original size [2022-11-22 01:28:18,389 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 [2022-11-22 01:28:18,667 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:28:18,668 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 [2022-11-22 01:28:18,753 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:28:18,754 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 [2022-11-22 01:28:18,940 INFO L197 IcfgInterpreter]: Interpreting procedure #Ultimate.meminit with input of size 70 for LOIs [2022-11-22 01:28:18,966 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 8 for LOIs [2022-11-22 01:28:18,967 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 01:28:22,677 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 [2022-11-22 01:28:22,677 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-22 01:28:22,677 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-22 01:28:22,677 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 12 [2022-11-22 01:28:22,677 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [712222208] [2022-11-22 01:28:22,677 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-22 01:28:22,678 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-22 01:28:22,678 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:28:22,678 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-22 01:28:22,679 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=984, Unknown=0, NotChecked=0, Total=1122 [2022-11-22 01:28:22,679 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) [2022-11-22 01:28:23,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:28:23,005 INFO L93 Difference]: Finished difference Result 211 states and 247 transitions. [2022-11-22 01:28:23,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-22 01:28:23,011 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 [2022-11-22 01:28:23,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:28:23,012 INFO L225 Difference]: With dead ends: 211 [2022-11-22 01:28:23,013 INFO L226 Difference]: Without dead ends: 211 [2022-11-22 01:28:23,013 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 76 SyntacticMatches, 4 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 423 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=184, Invalid=1376, Unknown=0, NotChecked=0, Total=1560 [2022-11-22 01:28:23,014 INFO L413 NwaCegarLoop]: 81 mSDtfsCounter, 269 mSDsluCounter, 466 mSDsCounter, 0 mSdLazyCounter, 319 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 272 SdHoareTripleChecker+Valid, 547 SdHoareTripleChecker+Invalid, 324 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 319 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-22 01:28:23,014 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [272 Valid, 547 Invalid, 324 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 319 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-22 01:28:23,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2022-11-22 01:28:23,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 127. [2022-11-22 01:28:23,019 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) [2022-11-22 01:28:23,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 157 transitions. [2022-11-22 01:28:23,020 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 157 transitions. Word has length 35 [2022-11-22 01:28:23,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:28:23,020 INFO L495 AbstractCegarLoop]: Abstraction has 127 states and 157 transitions. [2022-11-22 01:28:23,020 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) [2022-11-22 01:28:23,021 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 157 transitions. [2022-11-22 01:28:23,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-11-22 01:28:23,021 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:28:23,021 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] [2022-11-22 01:28:23,028 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0dd9036d-146f-4358-9ac0-018e53d6ce12/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-11-22 01:28:23,227 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0dd9036d-146f-4358-9ac0-018e53d6ce12/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2022-11-22 01:28:23,228 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)] === [2022-11-22 01:28:23,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:28:23,228 INFO L85 PathProgramCache]: Analyzing trace with hash -1300010612, now seen corresponding path program 1 times [2022-11-22 01:28:23,228 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:28:23,229 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [514264554] [2022-11-22 01:28:23,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:28:23,229 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:28:23,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:28:23,259 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-22 01:28:23,260 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:28:23,260 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [514264554] [2022-11-22 01:28:23,260 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [514264554] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 01:28:23,260 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 01:28:23,260 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-22 01:28:23,260 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1215728963] [2022-11-22 01:28:23,260 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:28:23,261 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-22 01:28:23,261 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:28:23,261 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-22 01:28:23,261 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-22 01:28:23,261 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) [2022-11-22 01:28:23,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:28:23,336 INFO L93 Difference]: Finished difference Result 147 states and 181 transitions. [2022-11-22 01:28:23,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-22 01:28:23,337 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 [2022-11-22 01:28:23,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:28:23,339 INFO L225 Difference]: With dead ends: 147 [2022-11-22 01:28:23,339 INFO L226 Difference]: Without dead ends: 147 [2022-11-22 01:28:23,339 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-22 01:28:23,340 INFO L413 NwaCegarLoop]: 51 mSDtfsCounter, 8 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s 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 [2022-11-22 01:28:23,346 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] [2022-11-22 01:28:23,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2022-11-22 01:28:23,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 137. [2022-11-22 01:28:23,350 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) [2022-11-22 01:28:23,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 174 transitions. [2022-11-22 01:28:23,352 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 174 transitions. Word has length 35 [2022-11-22 01:28:23,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:28:23,353 INFO L495 AbstractCegarLoop]: Abstraction has 137 states and 174 transitions. [2022-11-22 01:28:23,353 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) [2022-11-22 01:28:23,353 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 174 transitions. [2022-11-22 01:28:23,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-11-22 01:28:23,354 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:28:23,354 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] [2022-11-22 01:28:23,354 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2022-11-22 01:28:23,354 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)] === [2022-11-22 01:28:23,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:28:23,355 INFO L85 PathProgramCache]: Analyzing trace with hash -1300010611, now seen corresponding path program 1 times [2022-11-22 01:28:23,355 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:28:23,355 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2074009081] [2022-11-22 01:28:23,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:28:23,355 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:28:23,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:28:23,506 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-22 01:28:23,507 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:28:23,507 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2074009081] [2022-11-22 01:28:23,507 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2074009081] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 01:28:23,507 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1561866509] [2022-11-22 01:28:23,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:28:23,507 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:28:23,508 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0dd9036d-146f-4358-9ac0-018e53d6ce12/bin/utaipan-g80aRyZoba/z3 [2022-11-22 01:28:23,509 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0dd9036d-146f-4358-9ac0-018e53d6ce12/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 01:28:23,520 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0dd9036d-146f-4358-9ac0-018e53d6ce12/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-11-22 01:28:23,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:28:23,615 INFO L263 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-22 01:28:23,616 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:28:23,677 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-22 01:28:23,677 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 01:28:23,745 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-22 01:28:23,745 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1561866509] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 01:28:23,746 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [594681612] [2022-11-22 01:28:23,747 INFO L159 IcfgInterpreter]: Started Sifa with 26 locations of interest [2022-11-22 01:28:23,747 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 01:28:23,747 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 01:28:23,747 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 01:28:23,748 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 01:28:23,916 INFO L321 Elim1Store]: treesize reduction 54, result has 22.9 percent of original size [2022-11-22 01:28:23,917 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 [2022-11-22 01:28:24,038 INFO L321 Elim1Store]: treesize reduction 66, result has 19.5 percent of original size [2022-11-22 01:28:24,038 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 [2022-11-22 01:28:24,135 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2022-11-22 01:28:24,249 INFO L321 Elim1Store]: treesize reduction 66, result has 19.5 percent of original size [2022-11-22 01:28:24,249 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 [2022-11-22 01:28:24,508 INFO L321 Elim1Store]: treesize reduction 96, result has 17.9 percent of original size [2022-11-22 01:28:24,508 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 [2022-11-22 01:28:24,668 INFO L321 Elim1Store]: treesize reduction 182, result has 12.5 percent of original size [2022-11-22 01:28:24,668 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 [2022-11-22 01:28:24,893 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 [2022-11-22 01:28:24,911 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-22 01:28:25,041 INFO L321 Elim1Store]: treesize reduction 182, result has 12.5 percent of original size [2022-11-22 01:28:25,042 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 [2022-11-22 01:28:25,246 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 [2022-11-22 01:28:25,266 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-22 01:28:25,413 INFO L321 Elim1Store]: treesize reduction 28, result has 15.2 percent of original size [2022-11-22 01:28:25,415 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 [2022-11-22 01:28:25,558 INFO L321 Elim1Store]: treesize reduction 28, result has 15.2 percent of original size [2022-11-22 01:28:25,559 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 [2022-11-22 01:28:25,669 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2022-11-22 01:28:26,460 INFO L321 Elim1Store]: treesize reduction 182, result has 12.5 percent of original size [2022-11-22 01:28:26,460 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 [2022-11-22 01:28:26,705 INFO L321 Elim1Store]: treesize reduction 66, result has 19.5 percent of original size [2022-11-22 01:28:26,705 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 [2022-11-22 01:28:26,842 INFO L197 IcfgInterpreter]: Interpreting procedure #Ultimate.meminit with input of size 25 for LOIs [2022-11-22 01:28:26,848 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2022-11-22 01:28:26,849 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 8 for LOIs [2022-11-22 01:28:26,851 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 01:28:37,346 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 [2022-11-22 01:28:37,346 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-22 01:28:37,346 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-22 01:28:37,346 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 12 [2022-11-22 01:28:37,346 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1254837441] [2022-11-22 01:28:37,346 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-22 01:28:37,347 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-22 01:28:37,347 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:28:37,347 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-22 01:28:37,348 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=200, Invalid=1060, Unknown=0, NotChecked=0, Total=1260 [2022-11-22 01:28:37,348 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) [2022-11-22 01:28:37,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:28:37,581 INFO L93 Difference]: Finished difference Result 143 states and 177 transitions. [2022-11-22 01:28:37,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-22 01:28:37,581 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 [2022-11-22 01:28:37,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:28:37,583 INFO L225 Difference]: With dead ends: 143 [2022-11-22 01:28:37,583 INFO L226 Difference]: Without dead ends: 143 [2022-11-22 01:28:37,583 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 72 SyntacticMatches, 6 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 523 ImplicationChecksByTransitivity, 10.6s TimeCoverageRelationStatistics Valid=244, Invalid=1396, Unknown=0, NotChecked=0, Total=1640 [2022-11-22 01:28:37,583 INFO L413 NwaCegarLoop]: 46 mSDtfsCounter, 107 mSDsluCounter, 330 mSDsCounter, 0 mSdLazyCounter, 246 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 376 SdHoareTripleChecker+Invalid, 251 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 246 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-22 01:28:37,584 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [110 Valid, 376 Invalid, 251 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 246 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-22 01:28:37,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2022-11-22 01:28:37,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 133. [2022-11-22 01:28:37,588 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) [2022-11-22 01:28:37,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 168 transitions. [2022-11-22 01:28:37,589 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 168 transitions. Word has length 35 [2022-11-22 01:28:37,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:28:37,589 INFO L495 AbstractCegarLoop]: Abstraction has 133 states and 168 transitions. [2022-11-22 01:28:37,590 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) [2022-11-22 01:28:37,590 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 168 transitions. [2022-11-22 01:28:37,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-11-22 01:28:37,590 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:28:37,591 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] [2022-11-22 01:28:37,599 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0dd9036d-146f-4358-9ac0-018e53d6ce12/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-11-22 01:28:37,796 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0dd9036d-146f-4358-9ac0-018e53d6ce12/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2022-11-22 01:28:37,796 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)] === [2022-11-22 01:28:37,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:28:37,797 INFO L85 PathProgramCache]: Analyzing trace with hash 679838038, now seen corresponding path program 2 times [2022-11-22 01:28:37,797 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:28:37,797 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1708158475] [2022-11-22 01:28:37,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:28:37,797 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:28:37,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:28:38,086 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-22 01:28:38,086 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:28:38,086 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1708158475] [2022-11-22 01:28:38,086 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1708158475] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 01:28:38,086 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [285525890] [2022-11-22 01:28:38,087 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-22 01:28:38,087 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:28:38,087 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0dd9036d-146f-4358-9ac0-018e53d6ce12/bin/utaipan-g80aRyZoba/z3 [2022-11-22 01:28:38,088 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0dd9036d-146f-4358-9ac0-018e53d6ce12/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 01:28:38,111 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0dd9036d-146f-4358-9ac0-018e53d6ce12/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-11-22 01:28:38,191 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-22 01:28:38,192 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-22 01:28:38,193 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-22 01:28:38,195 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:28:38,374 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-22 01:28:38,374 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 01:28:38,752 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-22 01:28:38,753 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [285525890] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 01:28:38,753 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [949668116] [2022-11-22 01:28:38,754 INFO L159 IcfgInterpreter]: Started Sifa with 23 locations of interest [2022-11-22 01:28:38,754 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 01:28:38,755 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 01:28:38,755 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 01:28:38,755 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 01:28:39,096 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-11-22 01:28:39,103 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 [2022-11-22 01:28:39,138 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2022-11-22 01:28:39,229 INFO L321 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2022-11-22 01:28:39,229 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 [2022-11-22 01:28:39,256 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-22 01:28:39,256 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 [2022-11-22 01:28:39,348 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 [2022-11-22 01:28:39,359 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-22 01:28:39,444 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 [2022-11-22 01:28:39,456 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-22 01:28:39,568 INFO L321 Elim1Store]: treesize reduction 28, result has 15.2 percent of original size [2022-11-22 01:28:39,568 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 [2022-11-22 01:28:39,633 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:28:39,645 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-22 01:28:39,645 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 [2022-11-22 01:28:39,669 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:28:39,681 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-22 01:28:39,682 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 [2022-11-22 01:28:39,752 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:28:39,753 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 [2022-11-22 01:28:39,831 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:28:39,832 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 [2022-11-22 01:28:39,966 INFO L197 IcfgInterpreter]: Interpreting procedure #Ultimate.meminit with input of size 70 for LOIs [2022-11-22 01:28:39,993 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 8 for LOIs [2022-11-22 01:28:39,995 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 01:28:44,084 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 [2022-11-22 01:28:44,084 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-22 01:28:44,084 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-22 01:28:44,084 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8, 8] total 25 [2022-11-22 01:28:44,084 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [658552950] [2022-11-22 01:28:44,084 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-22 01:28:44,085 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-11-22 01:28:44,085 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:28:44,085 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-11-22 01:28:44,086 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=230, Invalid=2026, Unknown=0, NotChecked=0, Total=2256 [2022-11-22 01:28:44,086 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) [2022-11-22 01:28:46,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:28:46,297 INFO L93 Difference]: Finished difference Result 422 states and 528 transitions. [2022-11-22 01:28:46,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-11-22 01:28:46,298 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 [2022-11-22 01:28:46,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:28:46,301 INFO L225 Difference]: With dead ends: 422 [2022-11-22 01:28:46,301 INFO L226 Difference]: Without dead ends: 422 [2022-11-22 01:28:46,302 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1459 ImplicationChecksByTransitivity, 5.9s TimeCoverageRelationStatistics Valid=809, Invalid=4741, Unknown=0, NotChecked=0, Total=5550 [2022-11-22 01:28:46,302 INFO L413 NwaCegarLoop]: 71 mSDtfsCounter, 1159 mSDsluCounter, 501 mSDsCounter, 0 mSdLazyCounter, 946 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1159 SdHoareTripleChecker+Valid, 572 SdHoareTripleChecker+Invalid, 975 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 946 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-22 01:28:46,303 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1159 Valid, 572 Invalid, 975 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 946 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-11-22 01:28:46,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 422 states. [2022-11-22 01:28:46,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 422 to 138. [2022-11-22 01:28:46,309 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) [2022-11-22 01:28:46,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 176 transitions. [2022-11-22 01:28:46,310 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 176 transitions. Word has length 36 [2022-11-22 01:28:46,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:28:46,310 INFO L495 AbstractCegarLoop]: Abstraction has 138 states and 176 transitions. [2022-11-22 01:28:46,311 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) [2022-11-22 01:28:46,311 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 176 transitions. [2022-11-22 01:28:46,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-11-22 01:28:46,311 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:28:46,312 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 01:28:46,327 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0dd9036d-146f-4358-9ac0-018e53d6ce12/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-11-22 01:28:46,517 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0dd9036d-146f-4358-9ac0-018e53d6ce12/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2022-11-22 01:28:46,518 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)] === [2022-11-22 01:28:46,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:28:46,518 INFO L85 PathProgramCache]: Analyzing trace with hash -1241710387, now seen corresponding path program 1 times [2022-11-22 01:28:46,518 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:28:46,518 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1054200110] [2022-11-22 01:28:46,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:28:46,518 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:28:46,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:28:46,661 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-22 01:28:46,661 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:28:46,661 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1054200110] [2022-11-22 01:28:46,662 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1054200110] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 01:28:46,662 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1527485922] [2022-11-22 01:28:46,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:28:46,662 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:28:46,662 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0dd9036d-146f-4358-9ac0-018e53d6ce12/bin/utaipan-g80aRyZoba/z3 [2022-11-22 01:28:46,663 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0dd9036d-146f-4358-9ac0-018e53d6ce12/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 01:28:46,691 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0dd9036d-146f-4358-9ac0-018e53d6ce12/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-11-22 01:28:46,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:28:46,783 INFO L263 TraceCheckSpWp]: Trace formula consists of 254 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-22 01:28:46,784 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:28:46,818 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-22 01:28:46,818 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 01:28:46,865 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-22 01:28:46,867 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1527485922] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 01:28:46,868 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1537101472] [2022-11-22 01:28:46,870 INFO L159 IcfgInterpreter]: Started Sifa with 26 locations of interest [2022-11-22 01:28:46,870 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 01:28:46,871 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 01:28:46,871 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 01:28:46,871 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 01:28:47,116 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-11-22 01:28:47,123 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 [2022-11-22 01:28:47,158 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2022-11-22 01:28:47,258 INFO L321 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2022-11-22 01:28:47,259 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 [2022-11-22 01:28:47,286 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-22 01:28:47,286 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 [2022-11-22 01:28:47,381 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 [2022-11-22 01:28:47,392 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-22 01:28:47,470 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 [2022-11-22 01:28:47,482 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-22 01:28:47,534 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 [2022-11-22 01:28:47,630 INFO L321 Elim1Store]: treesize reduction 84, result has 9.7 percent of original size [2022-11-22 01:28:47,631 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 [2022-11-22 01:28:47,724 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:28:47,736 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-22 01:28:47,736 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 [2022-11-22 01:28:47,763 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:28:47,775 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-22 01:28:47,775 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 [2022-11-22 01:28:47,948 INFO L321 Elim1Store]: treesize reduction 44, result has 44.3 percent of original size [2022-11-22 01:28:47,949 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 [2022-11-22 01:28:48,256 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:28:48,275 INFO L321 Elim1Store]: treesize reduction 26, result has 48.0 percent of original size [2022-11-22 01:28:48,275 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 [2022-11-22 01:28:48,348 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:28:48,377 INFO L321 Elim1Store]: treesize reduction 26, result has 48.0 percent of original size [2022-11-22 01:28:48,378 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 [2022-11-22 01:28:48,527 INFO L321 Elim1Store]: treesize reduction 39, result has 22.0 percent of original size [2022-11-22 01:28:48,527 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 [2022-11-22 01:28:48,637 INFO L321 Elim1Store]: treesize reduction 26, result has 48.0 percent of original size [2022-11-22 01:28:48,638 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 [2022-11-22 01:28:51,654 INFO L197 IcfgInterpreter]: Interpreting procedure #Ultimate.meminit with input of size 70 for LOIs [2022-11-22 01:28:51,682 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 8 for LOIs [2022-11-22 01:28:51,683 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 01:29:01,945 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 [2022-11-22 01:29:01,945 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-22 01:29:01,945 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-22 01:29:01,945 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 10 [2022-11-22 01:29:01,945 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [709863944] [2022-11-22 01:29:01,946 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-22 01:29:01,946 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-22 01:29:01,946 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:29:01,946 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-22 01:29:01,947 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=163, Invalid=1027, Unknown=0, NotChecked=0, Total=1190 [2022-11-22 01:29:01,947 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) [2022-11-22 01:29:02,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:29:02,129 INFO L93 Difference]: Finished difference Result 143 states and 176 transitions. [2022-11-22 01:29:02,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-22 01:29:02,130 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 [2022-11-22 01:29:02,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:29:02,131 INFO L225 Difference]: With dead ends: 143 [2022-11-22 01:29:02,131 INFO L226 Difference]: Without dead ends: 143 [2022-11-22 01:29:02,132 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 78 SyntacticMatches, 3 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 368 ImplicationChecksByTransitivity, 10.4s TimeCoverageRelationStatistics Valid=195, Invalid=1365, Unknown=0, NotChecked=0, Total=1560 [2022-11-22 01:29:02,132 INFO L413 NwaCegarLoop]: 57 mSDtfsCounter, 178 mSDsluCounter, 190 mSDsCounter, 0 mSdLazyCounter, 189 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 181 SdHoareTripleChecker+Valid, 247 SdHoareTripleChecker+Invalid, 193 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 189 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-22 01:29:02,132 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [181 Valid, 247 Invalid, 193 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 189 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-22 01:29:02,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2022-11-22 01:29:02,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 131. [2022-11-22 01:29:02,136 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) [2022-11-22 01:29:02,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 167 transitions. [2022-11-22 01:29:02,137 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 167 transitions. Word has length 36 [2022-11-22 01:29:02,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:29:02,137 INFO L495 AbstractCegarLoop]: Abstraction has 131 states and 167 transitions. [2022-11-22 01:29:02,138 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) [2022-11-22 01:29:02,138 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 167 transitions. [2022-11-22 01:29:02,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-11-22 01:29:02,138 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:29:02,139 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] [2022-11-22 01:29:02,152 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0dd9036d-146f-4358-9ac0-018e53d6ce12/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-11-22 01:29:02,344 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0dd9036d-146f-4358-9ac0-018e53d6ce12/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-11-22 01:29:02,344 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)] === [2022-11-22 01:29:02,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:29:02,345 INFO L85 PathProgramCache]: Analyzing trace with hash 864999468, now seen corresponding path program 1 times [2022-11-22 01:29:02,345 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:29:02,345 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1720135694] [2022-11-22 01:29:02,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:29:02,345 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:29:02,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:29:02,405 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-22 01:29:02,405 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:29:02,405 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1720135694] [2022-11-22 01:29:02,405 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1720135694] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 01:29:02,405 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 01:29:02,405 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-22 01:29:02,406 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [617929963] [2022-11-22 01:29:02,406 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:29:02,407 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-22 01:29:02,407 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:29:02,407 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-22 01:29:02,408 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-22 01:29:02,408 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) [2022-11-22 01:29:02,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:29:02,457 INFO L93 Difference]: Finished difference Result 130 states and 166 transitions. [2022-11-22 01:29:02,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-22 01:29:02,458 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 [2022-11-22 01:29:02,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:29:02,459 INFO L225 Difference]: With dead ends: 130 [2022-11-22 01:29:02,459 INFO L226 Difference]: Without dead ends: 130 [2022-11-22 01:29:02,459 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-22 01:29:02,460 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, 0.0s IncrementalHoareTripleChecker+Time [2022-11-22 01:29:02,460 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [82 Valid, 58 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-22 01:29:02,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2022-11-22 01:29:02,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 130. [2022-11-22 01:29:02,464 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) [2022-11-22 01:29:02,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 166 transitions. [2022-11-22 01:29:02,464 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 166 transitions. Word has length 36 [2022-11-22 01:29:02,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:29:02,465 INFO L495 AbstractCegarLoop]: Abstraction has 130 states and 166 transitions. [2022-11-22 01:29:02,465 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) [2022-11-22 01:29:02,465 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 166 transitions. [2022-11-22 01:29:02,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-11-22 01:29:02,466 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:29:02,466 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] [2022-11-22 01:29:02,466 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2022-11-22 01:29:02,466 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)] === [2022-11-22 01:29:02,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:29:02,467 INFO L85 PathProgramCache]: Analyzing trace with hash -399857295, now seen corresponding path program 1 times [2022-11-22 01:29:02,467 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:29:02,467 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [934081840] [2022-11-22 01:29:02,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:29:02,467 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:29:02,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:29:03,067 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-22 01:29:03,067 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:29:03,067 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [934081840] [2022-11-22 01:29:03,067 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [934081840] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 01:29:03,068 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1814464203] [2022-11-22 01:29:03,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:29:03,068 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:29:03,068 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0dd9036d-146f-4358-9ac0-018e53d6ce12/bin/utaipan-g80aRyZoba/z3 [2022-11-22 01:29:03,070 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0dd9036d-146f-4358-9ac0-018e53d6ce12/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 01:29:03,095 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0dd9036d-146f-4358-9ac0-018e53d6ce12/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-11-22 01:29:03,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:29:03,418 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-22 01:29:03,420 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:29:03,622 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-22 01:29:03,622 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 01:29:03,879 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-22 01:29:03,880 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1814464203] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 01:29:03,880 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1873172759] [2022-11-22 01:29:03,881 INFO L159 IcfgInterpreter]: Started Sifa with 23 locations of interest [2022-11-22 01:29:03,881 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 01:29:03,881 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 01:29:03,882 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 01:29:03,882 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 01:29:04,142 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 [2022-11-22 01:29:04,148 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-11-22 01:29:04,202 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2022-11-22 01:29:04,305 INFO L321 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2022-11-22 01:29:04,305 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 [2022-11-22 01:29:04,333 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-22 01:29:04,333 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 [2022-11-22 01:29:04,419 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 [2022-11-22 01:29:04,431 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-22 01:29:04,534 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 [2022-11-22 01:29:04,545 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-22 01:29:04,599 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 [2022-11-22 01:29:04,691 INFO L321 Elim1Store]: treesize reduction 84, result has 9.7 percent of original size [2022-11-22 01:29:04,691 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 [2022-11-22 01:29:04,769 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:29:04,781 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-22 01:29:04,782 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 [2022-11-22 01:29:04,811 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:29:04,823 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-22 01:29:04,824 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 [2022-11-22 01:29:05,049 INFO L321 Elim1Store]: treesize reduction 76, result has 31.5 percent of original size [2022-11-22 01:29:05,049 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 [2022-11-22 01:29:05,355 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:29:05,356 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:29:05,358 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:29:05,389 INFO L321 Elim1Store]: treesize reduction 28, result has 60.6 percent of original size [2022-11-22 01:29:05,389 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 [2022-11-22 01:29:05,423 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:29:05,425 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:29:05,427 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:29:05,462 INFO L321 Elim1Store]: treesize reduction 28, result has 60.6 percent of original size [2022-11-22 01:29:05,462 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 [2022-11-22 01:29:05,542 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:29:05,548 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:29:05,606 INFO L321 Elim1Store]: treesize reduction 28, result has 60.6 percent of original size [2022-11-22 01:29:05,607 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 [2022-11-22 01:29:05,751 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:29:05,753 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:29:05,792 INFO L321 Elim1Store]: treesize reduction 28, result has 60.6 percent of original size [2022-11-22 01:29:05,793 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 [2022-11-22 01:29:06,033 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:29:06,033 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 [2022-11-22 01:29:06,173 INFO L197 IcfgInterpreter]: Interpreting procedure #Ultimate.meminit with input of size 70 for LOIs [2022-11-22 01:29:06,197 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 8 for LOIs [2022-11-22 01:29:06,198 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 01:29:10,883 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 [2022-11-22 01:29:10,883 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-22 01:29:10,883 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-22 01:29:10,883 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 9, 9] total 26 [2022-11-22 01:29:10,883 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1814507083] [2022-11-22 01:29:10,883 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-22 01:29:10,884 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-11-22 01:29:10,884 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:29:10,884 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-11-22 01:29:10,885 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=195, Invalid=2061, Unknown=0, NotChecked=0, Total=2256 [2022-11-22 01:29:10,886 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) [2022-11-22 01:29:14,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:29:14,137 INFO L93 Difference]: Finished difference Result 260 states and 331 transitions. [2022-11-22 01:29:14,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-11-22 01:29:14,137 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 [2022-11-22 01:29:14,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:29:14,139 INFO L225 Difference]: With dead ends: 260 [2022-11-22 01:29:14,139 INFO L226 Difference]: Without dead ends: 260 [2022-11-22 01:29:14,140 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 75 SyntacticMatches, 1 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1415 ImplicationChecksByTransitivity, 6.9s TimeCoverageRelationStatistics Valid=580, Invalid=4676, Unknown=0, NotChecked=0, Total=5256 [2022-11-22 01:29:14,140 INFO L413 NwaCegarLoop]: 55 mSDtfsCounter, 1132 mSDsluCounter, 512 mSDsCounter, 0 mSdLazyCounter, 1967 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1135 SdHoareTripleChecker+Valid, 567 SdHoareTripleChecker+Invalid, 1999 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 1967 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-11-22 01:29:14,140 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1135 Valid, 567 Invalid, 1999 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 1967 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-11-22 01:29:14,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2022-11-22 01:29:14,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 142. [2022-11-22 01:29:14,145 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) [2022-11-22 01:29:14,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 179 transitions. [2022-11-22 01:29:14,146 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 179 transitions. Word has length 37 [2022-11-22 01:29:14,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:29:14,146 INFO L495 AbstractCegarLoop]: Abstraction has 142 states and 179 transitions. [2022-11-22 01:29:14,146 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) [2022-11-22 01:29:14,147 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 179 transitions. [2022-11-22 01:29:14,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-11-22 01:29:14,147 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:29:14,147 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] [2022-11-22 01:29:14,160 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0dd9036d-146f-4358-9ac0-018e53d6ce12/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-11-22 01:29:14,354 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0dd9036d-146f-4358-9ac0-018e53d6ce12/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-11-22 01:29:14,354 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)] === [2022-11-22 01:29:14,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:29:14,355 INFO L85 PathProgramCache]: Analyzing trace with hash -46172498, now seen corresponding path program 1 times [2022-11-22 01:29:14,355 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:29:14,355 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [698767011] [2022-11-22 01:29:14,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:29:14,355 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:29:14,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:29:14,557 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-22 01:29:14,557 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:29:14,557 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [698767011] [2022-11-22 01:29:14,557 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [698767011] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 01:29:14,558 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1543144774] [2022-11-22 01:29:14,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:29:14,558 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:29:14,558 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0dd9036d-146f-4358-9ac0-018e53d6ce12/bin/utaipan-g80aRyZoba/z3 [2022-11-22 01:29:14,559 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0dd9036d-146f-4358-9ac0-018e53d6ce12/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 01:29:14,583 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0dd9036d-146f-4358-9ac0-018e53d6ce12/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-11-22 01:29:14,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:29:14,679 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-22 01:29:14,680 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:29:14,720 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-22 01:29:14,720 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-22 01:29:14,721 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1543144774] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 01:29:14,721 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-22 01:29:14,721 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [9] total 11 [2022-11-22 01:29:14,721 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [77722275] [2022-11-22 01:29:14,721 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:29:14,722 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-22 01:29:14,722 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:29:14,723 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-22 01:29:14,723 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2022-11-22 01:29:14,723 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) [2022-11-22 01:29:14,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:29:14,824 INFO L93 Difference]: Finished difference Result 155 states and 189 transitions. [2022-11-22 01:29:14,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-22 01:29:14,824 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 [2022-11-22 01:29:14,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:29:14,825 INFO L225 Difference]: With dead ends: 155 [2022-11-22 01:29:14,825 INFO L226 Difference]: Without dead ends: 155 [2022-11-22 01:29:14,826 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2022-11-22 01:29:14,826 INFO L413 NwaCegarLoop]: 57 mSDtfsCounter, 99 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 144 SdHoareTripleChecker+Invalid, 81 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 78 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-22 01:29:14,827 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [99 Valid, 144 Invalid, 81 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 78 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-22 01:29:14,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2022-11-22 01:29:14,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 144. [2022-11-22 01:29:14,830 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) [2022-11-22 01:29:14,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 181 transitions. [2022-11-22 01:29:14,831 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 181 transitions. Word has length 37 [2022-11-22 01:29:14,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:29:14,832 INFO L495 AbstractCegarLoop]: Abstraction has 144 states and 181 transitions. [2022-11-22 01:29:14,832 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) [2022-11-22 01:29:14,832 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 181 transitions. [2022-11-22 01:29:14,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-11-22 01:29:14,833 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:29:14,833 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] [2022-11-22 01:29:14,844 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0dd9036d-146f-4358-9ac0-018e53d6ce12/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-11-22 01:29:15,039 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0dd9036d-146f-4358-9ac0-018e53d6ce12/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:29:15,040 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)] === [2022-11-22 01:29:15,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:29:15,040 INFO L85 PathProgramCache]: Analyzing trace with hash -46298516, now seen corresponding path program 1 times [2022-11-22 01:29:15,040 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:29:15,040 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1483218559] [2022-11-22 01:29:15,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:29:15,040 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:29:15,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:29:15,195 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-22 01:29:15,196 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:29:15,196 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1483218559] [2022-11-22 01:29:15,196 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1483218559] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 01:29:15,196 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 01:29:15,197 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-22 01:29:15,197 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [663386370] [2022-11-22 01:29:15,197 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:29:15,197 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-22 01:29:15,197 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:29:15,198 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-22 01:29:15,198 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-11-22 01:29:15,198 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) [2022-11-22 01:29:15,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:29:15,413 INFO L93 Difference]: Finished difference Result 180 states and 223 transitions. [2022-11-22 01:29:15,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-22 01:29:15,414 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 [2022-11-22 01:29:15,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:29:15,415 INFO L225 Difference]: With dead ends: 180 [2022-11-22 01:29:15,415 INFO L226 Difference]: Without dead ends: 180 [2022-11-22 01:29:15,415 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 [2022-11-22 01:29:15,416 INFO L413 NwaCegarLoop]: 47 mSDtfsCounter, 202 mSDsluCounter, 100 mSDsCounter, 0 mSdLazyCounter, 140 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 202 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 [2022-11-22 01:29:15,416 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [202 Valid, 147 Invalid, 143 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 140 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-22 01:29:15,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2022-11-22 01:29:15,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 149. [2022-11-22 01:29:15,420 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) [2022-11-22 01:29:15,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 188 transitions. [2022-11-22 01:29:15,421 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 188 transitions. Word has length 37 [2022-11-22 01:29:15,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:29:15,421 INFO L495 AbstractCegarLoop]: Abstraction has 149 states and 188 transitions. [2022-11-22 01:29:15,421 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) [2022-11-22 01:29:15,421 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 188 transitions. [2022-11-22 01:29:15,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-11-22 01:29:15,422 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:29:15,422 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] [2022-11-22 01:29:15,422 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2022-11-22 01:29:15,422 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)] === [2022-11-22 01:29:15,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:29:15,422 INFO L85 PathProgramCache]: Analyzing trace with hash 1045179935, now seen corresponding path program 1 times [2022-11-22 01:29:15,423 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:29:15,423 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [655603306] [2022-11-22 01:29:15,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:29:15,424 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:29:15,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:29:15,548 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-22 01:29:15,548 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:29:15,548 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [655603306] [2022-11-22 01:29:15,548 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [655603306] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 01:29:15,548 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 01:29:15,549 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-22 01:29:15,549 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1752459447] [2022-11-22 01:29:15,549 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:29:15,549 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-22 01:29:15,549 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:29:15,550 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-22 01:29:15,550 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-22 01:29:15,550 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) [2022-11-22 01:29:15,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:29:15,736 INFO L93 Difference]: Finished difference Result 148 states and 187 transitions. [2022-11-22 01:29:15,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-22 01:29:15,737 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 [2022-11-22 01:29:15,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:29:15,738 INFO L225 Difference]: With dead ends: 148 [2022-11-22 01:29:15,738 INFO L226 Difference]: Without dead ends: 148 [2022-11-22 01:29:15,738 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2022-11-22 01:29:15,738 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 213 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 213 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-22 01:29:15,739 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [213 Valid, 65 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 71 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-22 01:29:15,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2022-11-22 01:29:15,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 148. [2022-11-22 01:29:15,742 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) [2022-11-22 01:29:15,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 187 transitions. [2022-11-22 01:29:15,743 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 187 transitions. Word has length 37 [2022-11-22 01:29:15,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:29:15,743 INFO L495 AbstractCegarLoop]: Abstraction has 148 states and 187 transitions. [2022-11-22 01:29:15,744 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) [2022-11-22 01:29:15,744 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 187 transitions. [2022-11-22 01:29:15,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-11-22 01:29:15,744 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:29:15,745 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] [2022-11-22 01:29:15,745 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2022-11-22 01:29:15,745 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)] === [2022-11-22 01:29:15,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:29:15,745 INFO L85 PathProgramCache]: Analyzing trace with hash -1435250909, now seen corresponding path program 1 times [2022-11-22 01:29:15,746 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:29:15,746 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1095637027] [2022-11-22 01:29:15,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:29:15,746 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:29:15,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:29:15,898 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-22 01:29:15,898 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:29:15,898 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1095637027] [2022-11-22 01:29:15,899 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1095637027] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 01:29:15,899 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 01:29:15,899 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-22 01:29:15,899 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2032312148] [2022-11-22 01:29:15,899 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:29:15,899 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-22 01:29:15,900 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:29:15,900 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-22 01:29:15,900 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2022-11-22 01:29:15,900 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) [2022-11-22 01:29:16,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:29:16,135 INFO L93 Difference]: Finished difference Result 197 states and 246 transitions. [2022-11-22 01:29:16,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-22 01:29:16,136 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 [2022-11-22 01:29:16,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:29:16,137 INFO L225 Difference]: With dead ends: 197 [2022-11-22 01:29:16,137 INFO L226 Difference]: Without dead ends: 197 [2022-11-22 01:29:16,137 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=88, Invalid=152, Unknown=0, NotChecked=0, Total=240 [2022-11-22 01:29:16,137 INFO L413 NwaCegarLoop]: 49 mSDtfsCounter, 207 mSDsluCounter, 103 mSDsCounter, 0 mSdLazyCounter, 104 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 207 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 [2022-11-22 01:29:16,138 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [207 Valid, 152 Invalid, 108 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 104 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-22 01:29:16,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2022-11-22 01:29:16,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 146. [2022-11-22 01:29:16,141 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) [2022-11-22 01:29:16,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 184 transitions. [2022-11-22 01:29:16,142 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 184 transitions. Word has length 38 [2022-11-22 01:29:16,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:29:16,142 INFO L495 AbstractCegarLoop]: Abstraction has 146 states and 184 transitions. [2022-11-22 01:29:16,143 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) [2022-11-22 01:29:16,143 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 184 transitions. [2022-11-22 01:29:16,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-11-22 01:29:16,143 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:29:16,143 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] [2022-11-22 01:29:16,143 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2022-11-22 01:29:16,143 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)] === [2022-11-22 01:29:16,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:29:16,144 INFO L85 PathProgramCache]: Analyzing trace with hash -1959160177, now seen corresponding path program 1 times [2022-11-22 01:29:16,144 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:29:16,144 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1580781651] [2022-11-22 01:29:16,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:29:16,144 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:29:16,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:29:16,389 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-22 01:29:16,389 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:29:16,389 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1580781651] [2022-11-22 01:29:16,390 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1580781651] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 01:29:16,390 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 01:29:16,390 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-22 01:29:16,390 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1913253778] [2022-11-22 01:29:16,390 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:29:16,390 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-22 01:29:16,391 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:29:16,391 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-22 01:29:16,391 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-22 01:29:16,391 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) [2022-11-22 01:29:16,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:29:16,598 INFO L93 Difference]: Finished difference Result 145 states and 183 transitions. [2022-11-22 01:29:16,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-22 01:29:16,599 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 [2022-11-22 01:29:16,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:29:16,600 INFO L225 Difference]: With dead ends: 145 [2022-11-22 01:29:16,600 INFO L226 Difference]: Without dead ends: 117 [2022-11-22 01:29:16,600 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2022-11-22 01:29:16,601 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 [2022-11-22 01:29:16,601 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] [2022-11-22 01:29:16,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2022-11-22 01:29:16,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 117. [2022-11-22 01:29:16,605 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) [2022-11-22 01:29:16,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 150 transitions. [2022-11-22 01:29:16,606 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 150 transitions. Word has length 38 [2022-11-22 01:29:16,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:29:16,606 INFO L495 AbstractCegarLoop]: Abstraction has 117 states and 150 transitions. [2022-11-22 01:29:16,606 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) [2022-11-22 01:29:16,616 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 150 transitions. [2022-11-22 01:29:16,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-11-22 01:29:16,616 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:29:16,617 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] [2022-11-22 01:29:16,617 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2022-11-22 01:29:16,617 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)] === [2022-11-22 01:29:16,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:29:16,618 INFO L85 PathProgramCache]: Analyzing trace with hash -1539597552, now seen corresponding path program 1 times [2022-11-22 01:29:16,618 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:29:16,618 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [647701835] [2022-11-22 01:29:16,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:29:16,618 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:29:16,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:29:16,833 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-22 01:29:16,833 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:29:16,834 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [647701835] [2022-11-22 01:29:16,834 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [647701835] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 01:29:16,834 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2129672573] [2022-11-22 01:29:16,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:29:16,834 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:29:16,834 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0dd9036d-146f-4358-9ac0-018e53d6ce12/bin/utaipan-g80aRyZoba/z3 [2022-11-22 01:29:16,839 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0dd9036d-146f-4358-9ac0-018e53d6ce12/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 01:29:16,863 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0dd9036d-146f-4358-9ac0-018e53d6ce12/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-11-22 01:29:16,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:29:16,961 INFO L263 TraceCheckSpWp]: Trace formula consists of 270 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-22 01:29:16,963 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:29:17,033 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-22 01:29:17,033 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 01:29:17,167 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-22 01:29:17,167 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2129672573] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 01:29:17,167 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1833748191] [2022-11-22 01:29:17,169 INFO L159 IcfgInterpreter]: Started Sifa with 28 locations of interest [2022-11-22 01:29:17,169 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 01:29:17,169 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 01:29:17,169 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 01:29:17,169 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 01:29:17,527 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2022-11-22 01:29:17,533 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-11-22 01:29:17,576 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 6 [2022-11-22 01:29:17,671 INFO L321 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2022-11-22 01:29:17,672 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 [2022-11-22 01:29:17,699 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-22 01:29:17,699 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 [2022-11-22 01:29:17,810 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 [2022-11-22 01:29:17,822 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-22 01:29:17,939 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 [2022-11-22 01:29:17,950 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-22 01:29:18,005 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 [2022-11-22 01:29:18,131 INFO L321 Elim1Store]: treesize reduction 84, result has 9.7 percent of original size [2022-11-22 01:29:18,131 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 [2022-11-22 01:29:18,229 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:29:18,243 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-22 01:29:18,244 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 [2022-11-22 01:29:18,269 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:29:18,282 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-22 01:29:18,283 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-22 01:29:18,526 INFO L321 Elim1Store]: treesize reduction 76, result has 31.5 percent of original size [2022-11-22 01:29:18,527 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 [2022-11-22 01:29:18,711 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-22 01:29:18,737 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:29:18,740 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:29:18,772 INFO L321 Elim1Store]: treesize reduction 28, result has 60.6 percent of original size [2022-11-22 01:29:18,773 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 [2022-11-22 01:29:18,819 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-22 01:29:18,855 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:29:18,856 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:29:18,859 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:29:18,901 INFO L321 Elim1Store]: treesize reduction 28, result has 60.6 percent of original size [2022-11-22 01:29:18,902 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 [2022-11-22 01:29:19,032 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:29:19,033 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 [2022-11-22 01:29:19,107 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:29:19,108 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 [2022-11-22 01:29:19,196 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 01:29:19,447 INFO L197 IcfgInterpreter]: Interpreting procedure #Ultimate.meminit with input of size 70 for LOIs [2022-11-22 01:29:19,475 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 8 for LOIs [2022-11-22 01:29:19,476 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 01:29:25,636 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 [2022-11-22 01:29:25,636 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-22 01:29:25,636 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-22 01:29:25,636 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 12 [2022-11-22 01:29:25,636 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [751157105] [2022-11-22 01:29:25,636 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-22 01:29:25,637 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-22 01:29:25,637 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:29:25,637 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-22 01:29:25,637 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=184, Invalid=1298, Unknown=0, NotChecked=0, Total=1482 [2022-11-22 01:29:25,638 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) [2022-11-22 01:29:25,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:29:25,861 INFO L93 Difference]: Finished difference Result 109 states and 134 transitions. [2022-11-22 01:29:25,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-22 01:29:25,862 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 [2022-11-22 01:29:25,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:29:25,862 INFO L225 Difference]: With dead ends: 109 [2022-11-22 01:29:25,863 INFO L226 Difference]: Without dead ends: 109 [2022-11-22 01:29:25,863 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 83 SyntacticMatches, 5 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 406 ImplicationChecksByTransitivity, 6.3s TimeCoverageRelationStatistics Valid=231, Invalid=1661, Unknown=0, NotChecked=0, Total=1892 [2022-11-22 01:29:25,863 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 139 mSDsluCounter, 190 mSDsCounter, 0 mSdLazyCounter, 213 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 139 SdHoareTripleChecker+Valid, 221 SdHoareTripleChecker+Invalid, 218 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 213 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-22 01:29:25,864 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [139 Valid, 221 Invalid, 218 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 213 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-22 01:29:25,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2022-11-22 01:29:25,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 96. [2022-11-22 01:29:25,866 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) [2022-11-22 01:29:25,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 114 transitions. [2022-11-22 01:29:25,867 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 114 transitions. Word has length 39 [2022-11-22 01:29:25,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:29:25,867 INFO L495 AbstractCegarLoop]: Abstraction has 96 states and 114 transitions. [2022-11-22 01:29:25,868 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) [2022-11-22 01:29:25,868 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 114 transitions. [2022-11-22 01:29:25,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-11-22 01:29:25,868 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:29:25,868 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] [2022-11-22 01:29:25,874 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0dd9036d-146f-4358-9ac0-018e53d6ce12/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-11-22 01:29:26,079 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0dd9036d-146f-4358-9ac0-018e53d6ce12/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:29:26,079 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)] === [2022-11-22 01:29:26,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:29:26,080 INFO L85 PathProgramCache]: Analyzing trace with hash 732853998, now seen corresponding path program 1 times [2022-11-22 01:29:26,080 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:29:26,080 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1972046583] [2022-11-22 01:29:26,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:29:26,080 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:29:26,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:29:26,167 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-11-22 01:29:26,167 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:29:26,167 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1972046583] [2022-11-22 01:29:26,168 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1972046583] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 01:29:26,168 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1184975991] [2022-11-22 01:29:26,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:29:26,168 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:29:26,168 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0dd9036d-146f-4358-9ac0-018e53d6ce12/bin/utaipan-g80aRyZoba/z3 [2022-11-22 01:29:26,169 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0dd9036d-146f-4358-9ac0-018e53d6ce12/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 01:29:26,195 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0dd9036d-146f-4358-9ac0-018e53d6ce12/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-11-22 01:29:26,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:29:26,295 INFO L263 TraceCheckSpWp]: Trace formula consists of 251 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-22 01:29:26,296 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:29:26,408 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 17 proven. 11 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-22 01:29:26,409 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 01:29:26,521 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 17 proven. 11 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-22 01:29:26,521 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1184975991] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 01:29:26,521 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2048237229] [2022-11-22 01:29:26,522 INFO L159 IcfgInterpreter]: Started Sifa with 23 locations of interest [2022-11-22 01:29:26,522 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 01:29:26,523 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 01:29:26,523 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 01:29:26,523 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 01:29:26,769 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 12 treesize of output 9 [2022-11-22 01:29:26,781 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 [2022-11-22 01:29:26,815 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2022-11-22 01:29:26,914 INFO L321 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2022-11-22 01:29:26,915 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 [2022-11-22 01:29:26,941 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-22 01:29:26,942 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 [2022-11-22 01:29:27,055 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 [2022-11-22 01:29:27,066 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-22 01:29:27,175 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 [2022-11-22 01:29:27,186 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-22 01:29:27,275 INFO L321 Elim1Store]: treesize reduction 38, result has 11.6 percent of original size [2022-11-22 01:29:27,276 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 [2022-11-22 01:29:27,350 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:29:27,363 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-22 01:29:27,363 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 [2022-11-22 01:29:27,402 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:29:27,414 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-22 01:29:27,414 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-22 01:29:27,440 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:29:27,452 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-22 01:29:27,452 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 [2022-11-22 01:29:27,542 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:29:27,542 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 [2022-11-22 01:29:27,625 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:29:27,626 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 [2022-11-22 01:29:27,758 INFO L321 Elim1Store]: treesize reduction 29, result has 59.7 percent of original size [2022-11-22 01:29:27,759 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 [2022-11-22 01:29:27,974 INFO L197 IcfgInterpreter]: Interpreting procedure #Ultimate.meminit with input of size 70 for LOIs [2022-11-22 01:29:28,001 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 8 for LOIs [2022-11-22 01:29:28,002 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 01:29:31,684 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 [2022-11-22 01:29:31,684 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-22 01:29:31,685 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-22 01:29:31,685 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 10, 10] total 19 [2022-11-22 01:29:31,685 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [327187490] [2022-11-22 01:29:31,685 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-22 01:29:31,685 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-11-22 01:29:31,685 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:29:31,686 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-11-22 01:29:31,686 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=197, Invalid=1443, Unknown=0, NotChecked=0, Total=1640 [2022-11-22 01:29:31,686 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) [2022-11-22 01:29:32,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:29:32,193 INFO L93 Difference]: Finished difference Result 136 states and 159 transitions. [2022-11-22 01:29:32,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-22 01:29:32,194 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 [2022-11-22 01:29:32,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:29:32,195 INFO L225 Difference]: With dead ends: 136 [2022-11-22 01:29:32,195 INFO L226 Difference]: Without dead ends: 136 [2022-11-22 01:29:32,195 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 89 SyntacticMatches, 3 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 824 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=372, Invalid=2490, Unknown=0, NotChecked=0, Total=2862 [2022-11-22 01:29:32,196 INFO L413 NwaCegarLoop]: 51 mSDtfsCounter, 325 mSDsluCounter, 362 mSDsCounter, 0 mSdLazyCounter, 406 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 325 SdHoareTripleChecker+Valid, 413 SdHoareTripleChecker+Invalid, 414 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 406 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-22 01:29:32,196 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [325 Valid, 413 Invalid, 414 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 406 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-22 01:29:32,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2022-11-22 01:29:32,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 95. [2022-11-22 01:29:32,198 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) [2022-11-22 01:29:32,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 110 transitions. [2022-11-22 01:29:32,199 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 110 transitions. Word has length 42 [2022-11-22 01:29:32,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:29:32,199 INFO L495 AbstractCegarLoop]: Abstraction has 95 states and 110 transitions. [2022-11-22 01:29:32,199 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) [2022-11-22 01:29:32,199 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 110 transitions. [2022-11-22 01:29:32,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-11-22 01:29:32,200 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:29:32,200 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] [2022-11-22 01:29:32,210 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0dd9036d-146f-4358-9ac0-018e53d6ce12/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-11-22 01:29:32,400 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0dd9036d-146f-4358-9ac0-018e53d6ce12/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2022-11-22 01:29:32,401 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)] === [2022-11-22 01:29:32,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:29:32,401 INFO L85 PathProgramCache]: Analyzing trace with hash 1600932628, now seen corresponding path program 1 times [2022-11-22 01:29:32,401 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:29:32,401 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1392501310] [2022-11-22 01:29:32,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:29:32,401 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:29:32,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:29:32,583 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-22 01:29:32,583 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:29:32,583 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1392501310] [2022-11-22 01:29:32,584 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1392501310] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 01:29:32,584 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1272591566] [2022-11-22 01:29:32,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:29:32,584 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:29:32,584 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0dd9036d-146f-4358-9ac0-018e53d6ce12/bin/utaipan-g80aRyZoba/z3 [2022-11-22 01:29:32,585 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0dd9036d-146f-4358-9ac0-018e53d6ce12/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 01:29:32,624 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0dd9036d-146f-4358-9ac0-018e53d6ce12/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-11-22 01:29:32,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:29:32,727 INFO L263 TraceCheckSpWp]: Trace formula consists of 283 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-22 01:29:32,728 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:29:32,818 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-22 01:29:32,819 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 01:29:32,929 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-22 01:29:32,930 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1272591566] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 01:29:32,930 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1702641511] [2022-11-22 01:29:32,931 INFO L159 IcfgInterpreter]: Started Sifa with 31 locations of interest [2022-11-22 01:29:32,931 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 01:29:32,931 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 01:29:32,932 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 01:29:32,932 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 01:29:33,222 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 [2022-11-22 01:29:33,227 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-11-22 01:29:33,267 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2022-11-22 01:29:33,355 INFO L321 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2022-11-22 01:29:33,355 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 [2022-11-22 01:29:33,385 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-22 01:29:33,385 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 [2022-11-22 01:29:33,497 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 [2022-11-22 01:29:33,508 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-22 01:29:33,590 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 [2022-11-22 01:29:33,602 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-22 01:29:33,692 INFO L321 Elim1Store]: treesize reduction 28, result has 15.2 percent of original size [2022-11-22 01:29:33,693 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 [2022-11-22 01:29:33,754 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:29:33,766 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-22 01:29:33,767 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 [2022-11-22 01:29:33,789 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:29:33,804 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-22 01:29:33,805 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 [2022-11-22 01:29:33,891 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:29:33,892 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 [2022-11-22 01:29:33,986 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:29:33,987 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 [2022-11-22 01:29:34,050 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:29:34,051 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 [2022-11-22 01:29:34,138 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2022-11-22 01:29:34,239 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:29:34,240 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:29:34,275 INFO L321 Elim1Store]: treesize reduction 25, result has 59.7 percent of original size [2022-11-22 01:29:34,275 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 [2022-11-22 01:29:34,341 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:29:34,342 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:29:34,350 INFO L321 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2022-11-22 01:29:34,351 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 [2022-11-22 01:29:34,494 INFO L321 Elim1Store]: treesize reduction 22, result has 59.3 percent of original size [2022-11-22 01:29:34,494 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 [2022-11-22 01:29:34,578 INFO L321 Elim1Store]: treesize reduction 27, result has 61.4 percent of original size [2022-11-22 01:29:34,578 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 [2022-11-22 01:29:34,729 INFO L321 Elim1Store]: treesize reduction 22, result has 59.3 percent of original size [2022-11-22 01:29:34,730 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 [2022-11-22 01:29:34,806 INFO L321 Elim1Store]: treesize reduction 27, result has 61.4 percent of original size [2022-11-22 01:29:34,807 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 [2022-11-22 01:29:35,025 INFO L197 IcfgInterpreter]: Interpreting procedure #Ultimate.meminit with input of size 70 for LOIs [2022-11-22 01:29:35,059 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 8 for LOIs [2022-11-22 01:29:35,061 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 01:29:41,435 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 [2022-11-22 01:29:41,435 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-22 01:29:41,436 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-22 01:29:41,436 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 18 [2022-11-22 01:29:41,436 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1412408212] [2022-11-22 01:29:41,436 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-22 01:29:41,436 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-22 01:29:41,436 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:29:41,437 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-22 01:29:41,437 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=218, Invalid=1944, Unknown=0, NotChecked=0, Total=2162 [2022-11-22 01:29:41,437 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) [2022-11-22 01:29:41,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:29:41,753 INFO L93 Difference]: Finished difference Result 125 states and 146 transitions. [2022-11-22 01:29:41,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-22 01:29:41,754 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 [2022-11-22 01:29:41,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:29:41,754 INFO L225 Difference]: With dead ends: 125 [2022-11-22 01:29:41,754 INFO L226 Difference]: Without dead ends: 125 [2022-11-22 01:29:41,755 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 91 SyntacticMatches, 2 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 765 ImplicationChecksByTransitivity, 6.6s TimeCoverageRelationStatistics Valid=293, Invalid=2463, Unknown=0, NotChecked=0, Total=2756 [2022-11-22 01:29:41,755 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 173 mSDsluCounter, 338 mSDsCounter, 0 mSdLazyCounter, 323 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 173 SdHoareTripleChecker+Valid, 372 SdHoareTripleChecker+Invalid, 332 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 323 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-22 01:29:41,756 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [173 Valid, 372 Invalid, 332 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 323 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-22 01:29:41,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2022-11-22 01:29:41,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 105. [2022-11-22 01:29:41,758 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) [2022-11-22 01:29:41,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 122 transitions. [2022-11-22 01:29:41,759 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 122 transitions. Word has length 43 [2022-11-22 01:29:41,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:29:41,759 INFO L495 AbstractCegarLoop]: Abstraction has 105 states and 122 transitions. [2022-11-22 01:29:41,759 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) [2022-11-22 01:29:41,760 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 122 transitions. [2022-11-22 01:29:41,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-11-22 01:29:41,760 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:29:41,760 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] [2022-11-22 01:29:41,771 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0dd9036d-146f-4358-9ac0-018e53d6ce12/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-11-22 01:29:41,965 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0dd9036d-146f-4358-9ac0-018e53d6ce12/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2022-11-22 01:29:41,966 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)] === [2022-11-22 01:29:41,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:29:41,966 INFO L85 PathProgramCache]: Analyzing trace with hash 955713917, now seen corresponding path program 2 times [2022-11-22 01:29:41,966 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:29:41,966 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [258372132] [2022-11-22 01:29:41,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:29:41,966 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:29:41,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:29:42,210 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 10 proven. 23 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-22 01:29:42,210 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:29:42,210 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [258372132] [2022-11-22 01:29:42,210 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [258372132] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 01:29:42,211 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [208032141] [2022-11-22 01:29:42,211 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-22 01:29:42,211 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:29:42,211 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0dd9036d-146f-4358-9ac0-018e53d6ce12/bin/utaipan-g80aRyZoba/z3 [2022-11-22 01:29:42,215 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0dd9036d-146f-4358-9ac0-018e53d6ce12/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 01:29:42,239 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0dd9036d-146f-4358-9ac0-018e53d6ce12/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-11-22 01:29:42,401 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-22 01:29:42,401 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-22 01:29:42,403 INFO L263 TraceCheckSpWp]: Trace formula consists of 236 conjuncts, 33 conjunts are in the unsatisfiable core [2022-11-22 01:29:42,405 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:29:42,820 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 7 proven. 11 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-11-22 01:29:42,820 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 01:29:43,275 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2022-11-22 01:29:43,415 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 1 proven. 17 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-11-22 01:29:43,415 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [208032141] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 01:29:43,415 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [995249520] [2022-11-22 01:29:43,417 INFO L159 IcfgInterpreter]: Started Sifa with 23 locations of interest [2022-11-22 01:29:43,417 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 01:29:43,417 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 01:29:43,417 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 01:29:43,417 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 01:29:43,700 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-11-22 01:29:43,705 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 [2022-11-22 01:29:43,746 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2022-11-22 01:29:43,837 INFO L321 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2022-11-22 01:29:43,837 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 [2022-11-22 01:29:43,864 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-22 01:29:43,865 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 128 treesize of output 130 [2022-11-22 01:29:43,963 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 [2022-11-22 01:29:43,979 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-22 01:29:44,076 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 [2022-11-22 01:29:44,088 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-22 01:29:44,194 INFO L321 Elim1Store]: treesize reduction 28, result has 15.2 percent of original size [2022-11-22 01:29:44,194 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 [2022-11-22 01:29:44,261 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:29:44,274 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-22 01:29:44,274 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 [2022-11-22 01:29:44,302 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:29:44,314 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-22 01:29:44,314 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 [2022-11-22 01:29:44,383 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:29:44,384 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 [2022-11-22 01:29:44,431 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:29:44,431 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 36 treesize of output 28 [2022-11-22 01:29:44,570 INFO L197 IcfgInterpreter]: Interpreting procedure #Ultimate.meminit with input of size 70 for LOIs [2022-11-22 01:29:44,595 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 8 for LOIs [2022-11-22 01:29:44,596 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 01:29:48,873 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 [2022-11-22 01:29:48,874 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-22 01:29:48,874 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-22 01:29:48,874 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11] total 31 [2022-11-22 01:29:48,874 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [632337327] [2022-11-22 01:29:48,874 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-22 01:29:48,874 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-11-22 01:29:48,875 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:29:48,875 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-11-22 01:29:48,875 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=241, Invalid=2515, Unknown=0, NotChecked=0, Total=2756 [2022-11-22 01:29:48,876 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) [2022-11-22 01:29:56,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:29:56,170 INFO L93 Difference]: Finished difference Result 382 states and 455 transitions. [2022-11-22 01:29:56,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2022-11-22 01:29:56,171 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 [2022-11-22 01:29:56,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:29:56,172 INFO L225 Difference]: With dead ends: 382 [2022-11-22 01:29:56,172 INFO L226 Difference]: Without dead ends: 382 [2022-11-22 01:29:56,174 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 117 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4591 ImplicationChecksByTransitivity, 10.9s TimeCoverageRelationStatistics Valid=1863, Invalid=12179, Unknown=0, NotChecked=0, Total=14042 [2022-11-22 01:29:56,175 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 1677 mSDsluCounter, 276 mSDsCounter, 0 mSdLazyCounter, 1122 mSolverCounterSat, 87 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1677 SdHoareTripleChecker+Valid, 303 SdHoareTripleChecker+Invalid, 1209 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 87 IncrementalHoareTripleChecker+Valid, 1122 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-11-22 01:29:56,175 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1677 Valid, 303 Invalid, 1209 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [87 Valid, 1122 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-11-22 01:29:56,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 382 states. [2022-11-22 01:29:56,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 382 to 137. [2022-11-22 01:29:56,179 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) [2022-11-22 01:29:56,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 163 transitions. [2022-11-22 01:29:56,180 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 163 transitions. Word has length 44 [2022-11-22 01:29:56,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:29:56,181 INFO L495 AbstractCegarLoop]: Abstraction has 137 states and 163 transitions. [2022-11-22 01:29:56,181 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) [2022-11-22 01:29:56,181 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 163 transitions. [2022-11-22 01:29:56,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-11-22 01:29:56,182 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:29:56,182 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] [2022-11-22 01:29:56,191 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0dd9036d-146f-4358-9ac0-018e53d6ce12/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2022-11-22 01:29:56,388 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37,25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0dd9036d-146f-4358-9ac0-018e53d6ce12/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:29:56,388 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)] === [2022-11-22 01:29:56,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:29:56,388 INFO L85 PathProgramCache]: Analyzing trace with hash -433061561, now seen corresponding path program 2 times [2022-11-22 01:29:56,388 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:29:56,388 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [428336598] [2022-11-22 01:29:56,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:29:56,389 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:29:56,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:29:56,627 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-11-22 01:29:56,627 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:29:56,627 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [428336598] [2022-11-22 01:29:56,627 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [428336598] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 01:29:56,628 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1676142970] [2022-11-22 01:29:56,628 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-22 01:29:56,628 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:29:56,628 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0dd9036d-146f-4358-9ac0-018e53d6ce12/bin/utaipan-g80aRyZoba/z3 [2022-11-22 01:29:56,631 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0dd9036d-146f-4358-9ac0-018e53d6ce12/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 01:29:56,659 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0dd9036d-146f-4358-9ac0-018e53d6ce12/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-11-22 01:29:56,756 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-22 01:29:56,756 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-22 01:29:56,757 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-22 01:29:56,759 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:29:56,979 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 8 proven. 5 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-11-22 01:29:56,979 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 01:29:57,282 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 [2022-11-22 01:29:57,349 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-11-22 01:29:57,349 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1676142970] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 01:29:57,350 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [650703419] [2022-11-22 01:29:57,351 INFO L159 IcfgInterpreter]: Started Sifa with 23 locations of interest [2022-11-22 01:29:57,351 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 01:29:57,351 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 01:29:57,351 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 01:29:57,351 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 01:29:57,605 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-11-22 01:29:57,612 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 [2022-11-22 01:29:57,649 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2022-11-22 01:29:57,739 INFO L321 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2022-11-22 01:29:57,740 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 [2022-11-22 01:29:57,769 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-22 01:29:57,770 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 [2022-11-22 01:29:57,877 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 [2022-11-22 01:29:57,888 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-22 01:29:57,965 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 [2022-11-22 01:29:57,977 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-22 01:29:58,027 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 20 [2022-11-22 01:29:58,120 INFO L321 Elim1Store]: treesize reduction 84, result has 9.7 percent of original size [2022-11-22 01:29:58,121 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 [2022-11-22 01:29:58,197 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:29:58,209 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-22 01:29:58,209 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 [2022-11-22 01:29:58,232 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:29:58,244 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-22 01:29:58,244 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 [2022-11-22 01:29:58,495 INFO L321 Elim1Store]: treesize reduction 76, result has 31.5 percent of original size [2022-11-22 01:29:58,495 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 [2022-11-22 01:29:58,877 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:29:58,879 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:29:58,920 INFO L321 Elim1Store]: treesize reduction 28, result has 60.6 percent of original size [2022-11-22 01:29:58,921 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 [2022-11-22 01:29:59,046 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:29:59,048 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:29:59,087 INFO L321 Elim1Store]: treesize reduction 28, result has 60.6 percent of original size [2022-11-22 01:29:59,087 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 [2022-11-22 01:29:59,159 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:29:59,161 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:29:59,162 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:29:59,163 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:29:59,203 INFO L321 Elim1Store]: treesize reduction 28, result has 60.6 percent of original size [2022-11-22 01:29:59,204 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 [2022-11-22 01:29:59,298 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:29:59,300 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:29:59,301 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:29:59,302 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:29:59,353 INFO L321 Elim1Store]: treesize reduction 28, result has 60.6 percent of original size [2022-11-22 01:29:59,353 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 [2022-11-22 01:29:59,555 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:29:59,556 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 28 [2022-11-22 01:29:59,622 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:29:59,622 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 [2022-11-22 01:29:59,773 INFO L197 IcfgInterpreter]: Interpreting procedure #Ultimate.meminit with input of size 70 for LOIs [2022-11-22 01:29:59,798 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 8 for LOIs [2022-11-22 01:29:59,799 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 01:30:03,844 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 [2022-11-22 01:30:03,845 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-22 01:30:03,845 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-22 01:30:03,845 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 24 [2022-11-22 01:30:03,845 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1107763706] [2022-11-22 01:30:03,845 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-22 01:30:03,846 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-11-22 01:30:03,846 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:30:03,846 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-11-22 01:30:03,846 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=265, Invalid=1897, Unknown=0, NotChecked=0, Total=2162 [2022-11-22 01:30:03,846 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) [2022-11-22 01:30:04,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:30:04,911 INFO L93 Difference]: Finished difference Result 194 states and 230 transitions. [2022-11-22 01:30:04,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-11-22 01:30:04,912 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 [2022-11-22 01:30:04,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:30:04,913 INFO L225 Difference]: With dead ends: 194 [2022-11-22 01:30:04,913 INFO L226 Difference]: Without dead ends: 194 [2022-11-22 01:30:04,913 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1140 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=595, Invalid=3311, Unknown=0, NotChecked=0, Total=3906 [2022-11-22 01:30:04,914 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 589 mSDsluCounter, 192 mSDsCounter, 0 mSdLazyCounter, 519 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 589 SdHoareTripleChecker+Valid, 220 SdHoareTripleChecker+Invalid, 537 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 519 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-22 01:30:04,914 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [589 Valid, 220 Invalid, 537 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 519 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-22 01:30:04,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2022-11-22 01:30:04,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 135. [2022-11-22 01:30:04,918 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) [2022-11-22 01:30:04,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 160 transitions. [2022-11-22 01:30:04,919 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 160 transitions. Word has length 45 [2022-11-22 01:30:04,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:30:04,919 INFO L495 AbstractCegarLoop]: Abstraction has 135 states and 160 transitions. [2022-11-22 01:30:04,919 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) [2022-11-22 01:30:04,919 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 160 transitions. [2022-11-22 01:30:04,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-11-22 01:30:04,920 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:30:04,920 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] [2022-11-22 01:30:04,927 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0dd9036d-146f-4358-9ac0-018e53d6ce12/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2022-11-22 01:30:05,126 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0dd9036d-146f-4358-9ac0-018e53d6ce12/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2022-11-22 01:30:05,127 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)] === [2022-11-22 01:30:05,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:30:05,127 INFO L85 PathProgramCache]: Analyzing trace with hash 901566904, now seen corresponding path program 1 times [2022-11-22 01:30:05,127 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:30:05,127 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1075049342] [2022-11-22 01:30:05,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:30:05,128 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:30:05,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:30:05,468 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-22 01:30:05,468 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:30:05,469 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1075049342] [2022-11-22 01:30:05,469 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1075049342] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 01:30:05,469 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2081404205] [2022-11-22 01:30:05,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:30:05,469 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:30:05,469 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0dd9036d-146f-4358-9ac0-018e53d6ce12/bin/utaipan-g80aRyZoba/z3 [2022-11-22 01:30:05,470 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0dd9036d-146f-4358-9ac0-018e53d6ce12/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 01:30:05,499 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0dd9036d-146f-4358-9ac0-018e53d6ce12/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-11-22 01:30:05,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:30:05,613 INFO L263 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-22 01:30:05,614 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:30:05,796 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-22 01:30:05,796 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 01:30:05,920 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 [2022-11-22 01:30:06,000 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-22 01:30:06,000 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2081404205] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 01:30:06,000 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1737768326] [2022-11-22 01:30:06,002 INFO L159 IcfgInterpreter]: Started Sifa with 33 locations of interest [2022-11-22 01:30:06,002 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 01:30:06,002 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 01:30:06,002 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 01:30:06,002 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 01:30:06,286 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 0 case distinctions, treesize of input 12 treesize of output 9 [2022-11-22 01:30:06,293 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 [2022-11-22 01:30:06,327 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2022-11-22 01:30:06,419 INFO L321 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2022-11-22 01:30:06,420 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 [2022-11-22 01:30:06,447 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-22 01:30:06,447 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 [2022-11-22 01:30:06,532 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 [2022-11-22 01:30:06,544 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-22 01:30:06,621 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 [2022-11-22 01:30:06,632 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-22 01:30:06,724 INFO L321 Elim1Store]: treesize reduction 28, result has 15.2 percent of original size [2022-11-22 01:30:06,724 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 [2022-11-22 01:30:06,786 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:30:06,799 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-22 01:30:06,799 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 [2022-11-22 01:30:06,823 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:30:06,835 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-22 01:30:06,835 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 [2022-11-22 01:30:06,924 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:30:06,925 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 36 treesize of output 28 [2022-11-22 01:30:07,008 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:30:07,009 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 [2022-11-22 01:30:07,077 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:30:07,078 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 [2022-11-22 01:30:07,159 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2022-11-22 01:30:07,264 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:30:07,266 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:30:07,300 INFO L321 Elim1Store]: treesize reduction 25, result has 59.7 percent of original size [2022-11-22 01:30:07,300 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 [2022-11-22 01:30:07,373 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:30:07,374 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:30:07,383 INFO L321 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-11-22 01:30:07,383 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 [2022-11-22 01:30:07,510 INFO L321 Elim1Store]: treesize reduction 22, result has 59.3 percent of original size [2022-11-22 01:30:07,510 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 33 treesize of output 45 [2022-11-22 01:30:07,579 INFO L321 Elim1Store]: treesize reduction 27, result has 61.4 percent of original size [2022-11-22 01:30:07,579 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 [2022-11-22 01:30:07,723 INFO L321 Elim1Store]: treesize reduction 22, result has 59.3 percent of original size [2022-11-22 01:30:07,724 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 [2022-11-22 01:30:07,795 INFO L321 Elim1Store]: treesize reduction 27, result has 61.4 percent of original size [2022-11-22 01:30:07,795 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 69 treesize of output 77 [2022-11-22 01:30:07,965 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:30:07,965 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 [2022-11-22 01:30:08,021 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:30:08,021 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 40 treesize of output 31 [2022-11-22 01:30:08,153 INFO L321 Elim1Store]: treesize reduction 22, result has 59.3 percent of original size [2022-11-22 01:30:08,153 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 [2022-11-22 01:30:08,236 INFO L321 Elim1Store]: treesize reduction 27, result has 61.4 percent of original size [2022-11-22 01:30:08,237 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 [2022-11-22 01:30:08,403 INFO L321 Elim1Store]: treesize reduction 22, result has 59.3 percent of original size [2022-11-22 01:30:08,403 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 [2022-11-22 01:30:08,496 INFO L321 Elim1Store]: treesize reduction 27, result has 61.4 percent of original size [2022-11-22 01:30:08,497 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 [2022-11-22 01:30:08,671 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:30:08,672 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 [2022-11-22 01:30:08,720 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:30:08,720 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 40 treesize of output 31 [2022-11-22 01:30:08,856 INFO L321 Elim1Store]: treesize reduction 22, result has 59.3 percent of original size [2022-11-22 01:30:08,856 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 [2022-11-22 01:30:08,960 INFO L321 Elim1Store]: treesize reduction 27, result has 61.4 percent of original size [2022-11-22 01:30:08,960 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 [2022-11-22 01:30:09,120 INFO L321 Elim1Store]: treesize reduction 22, result has 59.3 percent of original size [2022-11-22 01:30:09,120 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 [2022-11-22 01:30:09,209 INFO L321 Elim1Store]: treesize reduction 27, result has 61.4 percent of original size [2022-11-22 01:30:09,209 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 [2022-11-22 01:30:09,470 INFO L197 IcfgInterpreter]: Interpreting procedure #Ultimate.meminit with input of size 70 for LOIs [2022-11-22 01:30:09,495 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 8 for LOIs [2022-11-22 01:30:09,496 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 01:30:17,757 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 [2022-11-22 01:30:17,757 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-22 01:30:17,758 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-22 01:30:17,758 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 7, 7] total 19 [2022-11-22 01:30:17,758 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [482103952] [2022-11-22 01:30:17,758 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-22 01:30:17,758 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-11-22 01:30:17,758 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:30:17,759 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-11-22 01:30:17,759 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=386, Invalid=2164, Unknown=0, NotChecked=0, Total=2550 [2022-11-22 01:30:17,760 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) [2022-11-22 01:30:18,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:30:18,382 INFO L93 Difference]: Finished difference Result 155 states and 178 transitions. [2022-11-22 01:30:18,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-22 01:30:18,382 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 [2022-11-22 01:30:18,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:30:18,383 INFO L225 Difference]: With dead ends: 155 [2022-11-22 01:30:18,384 INFO L226 Difference]: Without dead ends: 155 [2022-11-22 01:30:18,384 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 92 SyntacticMatches, 2 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1275 ImplicationChecksByTransitivity, 8.8s TimeCoverageRelationStatistics Valid=585, Invalid=3075, Unknown=0, NotChecked=0, Total=3660 [2022-11-22 01:30:18,384 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 351 mSDsluCounter, 136 mSDsCounter, 0 mSdLazyCounter, 372 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 351 SdHoareTripleChecker+Valid, 155 SdHoareTripleChecker+Invalid, 379 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 372 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-22 01:30:18,385 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [351 Valid, 155 Invalid, 379 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 372 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-22 01:30:18,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2022-11-22 01:30:18,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 137. [2022-11-22 01:30:18,388 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) [2022-11-22 01:30:18,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 162 transitions. [2022-11-22 01:30:18,389 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 162 transitions. Word has length 45 [2022-11-22 01:30:18,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:30:18,389 INFO L495 AbstractCegarLoop]: Abstraction has 137 states and 162 transitions. [2022-11-22 01:30:18,389 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) [2022-11-22 01:30:18,390 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 162 transitions. [2022-11-22 01:30:18,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-11-22 01:30:18,390 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:30:18,390 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] [2022-11-22 01:30:18,407 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0dd9036d-146f-4358-9ac0-018e53d6ce12/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2022-11-22 01:30:18,603 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0dd9036d-146f-4358-9ac0-018e53d6ce12/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2022-11-22 01:30:18,603 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)] === [2022-11-22 01:30:18,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:30:18,603 INFO L85 PathProgramCache]: Analyzing trace with hash -540006496, now seen corresponding path program 2 times [2022-11-22 01:30:18,604 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:30:18,604 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [314790876] [2022-11-22 01:30:18,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:30:18,604 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:30:18,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:30:18,872 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-11-22 01:30:18,873 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:30:18,873 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [314790876] [2022-11-22 01:30:18,873 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [314790876] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 01:30:18,873 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1652982307] [2022-11-22 01:30:18,873 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-22 01:30:18,873 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:30:18,873 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0dd9036d-146f-4358-9ac0-018e53d6ce12/bin/utaipan-g80aRyZoba/z3 [2022-11-22 01:30:18,874 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0dd9036d-146f-4358-9ac0-018e53d6ce12/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 01:30:18,877 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0dd9036d-146f-4358-9ac0-018e53d6ce12/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-11-22 01:30:19,139 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-22 01:30:19,139 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-22 01:30:19,141 INFO L263 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 32 conjunts are in the unsatisfiable core [2022-11-22 01:30:19,142 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:30:19,657 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-11-22 01:30:19,657 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 01:30:19,986 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 [2022-11-22 01:30:20,252 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-11-22 01:30:20,252 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1652982307] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 01:30:20,252 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1578015492] [2022-11-22 01:30:20,253 INFO L159 IcfgInterpreter]: Started Sifa with 23 locations of interest [2022-11-22 01:30:20,253 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 01:30:20,254 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 01:30:20,254 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 01:30:20,254 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 01:30:20,538 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 [2022-11-22 01:30:20,544 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-11-22 01:30:20,585 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2022-11-22 01:30:20,675 INFO L321 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2022-11-22 01:30:20,676 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 [2022-11-22 01:30:20,702 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-22 01:30:20,702 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 [2022-11-22 01:30:20,822 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 [2022-11-22 01:30:20,833 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-22 01:30:20,934 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 [2022-11-22 01:30:20,945 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-22 01:30:21,037 INFO L321 Elim1Store]: treesize reduction 28, result has 15.2 percent of original size [2022-11-22 01:30:21,037 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 [2022-11-22 01:30:21,099 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:30:21,111 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-22 01:30:21,112 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 [2022-11-22 01:30:21,133 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:30:21,145 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-22 01:30:21,146 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 [2022-11-22 01:30:21,235 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:30:21,235 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 [2022-11-22 01:30:21,316 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:30:21,317 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 [2022-11-22 01:30:21,388 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:30:21,389 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 [2022-11-22 01:30:21,574 INFO L197 IcfgInterpreter]: Interpreting procedure #Ultimate.meminit with input of size 70 for LOIs [2022-11-22 01:30:21,599 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 8 for LOIs [2022-11-22 01:30:21,600 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 01:30:26,115 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 [2022-11-22 01:30:26,115 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-22 01:30:26,115 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-22 01:30:26,115 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 31 [2022-11-22 01:30:26,115 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [978484913] [2022-11-22 01:30:26,115 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-22 01:30:26,116 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-11-22 01:30:26,116 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:30:26,116 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-11-22 01:30:26,116 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=254, Invalid=2608, Unknown=0, NotChecked=0, Total=2862 [2022-11-22 01:30:26,117 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) [2022-11-22 01:30:29,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:30:29,225 INFO L93 Difference]: Finished difference Result 253 states and 301 transitions. [2022-11-22 01:30:29,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-11-22 01:30:29,226 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 [2022-11-22 01:30:29,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:30:29,228 INFO L225 Difference]: With dead ends: 253 [2022-11-22 01:30:29,228 INFO L226 Difference]: Without dead ends: 253 [2022-11-22 01:30:29,228 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1548 ImplicationChecksByTransitivity, 7.4s TimeCoverageRelationStatistics Valid=867, Invalid=5295, Unknown=0, NotChecked=0, Total=6162 [2022-11-22 01:30:29,229 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 1413 mSDsluCounter, 325 mSDsCounter, 0 mSdLazyCounter, 980 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1413 SdHoareTripleChecker+Valid, 361 SdHoareTripleChecker+Invalid, 1003 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 980 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-22 01:30:29,229 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1413 Valid, 361 Invalid, 1003 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 980 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-11-22 01:30:29,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 253 states. [2022-11-22 01:30:29,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 253 to 147. [2022-11-22 01:30:29,233 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) [2022-11-22 01:30:29,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 175 transitions. [2022-11-22 01:30:29,234 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 175 transitions. Word has length 46 [2022-11-22 01:30:29,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:30:29,234 INFO L495 AbstractCegarLoop]: Abstraction has 147 states and 175 transitions. [2022-11-22 01:30:29,234 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) [2022-11-22 01:30:29,235 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 175 transitions. [2022-11-22 01:30:29,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-11-22 01:30:29,235 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:30:29,235 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, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 01:30:29,248 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0dd9036d-146f-4358-9ac0-018e53d6ce12/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2022-11-22 01:30:29,448 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0dd9036d-146f-4358-9ac0-018e53d6ce12/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2022-11-22 01:30:29,448 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)] === [2022-11-22 01:30:29,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:30:29,449 INFO L85 PathProgramCache]: Analyzing trace with hash -2116110673, now seen corresponding path program 1 times [2022-11-22 01:30:29,449 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:30:29,449 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1329475022] [2022-11-22 01:30:29,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:30:29,449 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:30:29,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:30:29,599 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-22 01:30:29,599 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:30:29,599 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1329475022] [2022-11-22 01:30:29,599 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1329475022] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 01:30:29,600 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [460710827] [2022-11-22 01:30:29,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:30:29,600 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:30:29,600 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0dd9036d-146f-4358-9ac0-018e53d6ce12/bin/utaipan-g80aRyZoba/z3 [2022-11-22 01:30:29,601 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0dd9036d-146f-4358-9ac0-018e53d6ce12/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 01:30:29,612 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0dd9036d-146f-4358-9ac0-018e53d6ce12/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-11-22 01:30:29,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:30:29,746 INFO L263 TraceCheckSpWp]: Trace formula consists of 311 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-22 01:30:29,747 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:30:29,796 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-22 01:30:29,797 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 01:30:29,869 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-22 01:30:29,869 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [460710827] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 01:30:29,869 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1234982421] [2022-11-22 01:30:29,870 INFO L159 IcfgInterpreter]: Started Sifa with 34 locations of interest [2022-11-22 01:30:29,870 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 01:30:29,871 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 01:30:29,871 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 01:30:29,871 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 01:30:30,099 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 0 case distinctions, treesize of input 12 treesize of output 9 [2022-11-22 01:30:30,104 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 [2022-11-22 01:30:30,144 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2022-11-22 01:30:30,232 INFO L321 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2022-11-22 01:30:30,232 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 [2022-11-22 01:30:30,259 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-22 01:30:30,259 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 [2022-11-22 01:30:30,357 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 [2022-11-22 01:30:30,369 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-22 01:30:30,443 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 [2022-11-22 01:30:30,454 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-22 01:30:30,558 INFO L321 Elim1Store]: treesize reduction 38, result has 11.6 percent of original size [2022-11-22 01:30:30,558 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 [2022-11-22 01:30:30,633 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:30:30,645 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-22 01:30:30,645 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 [2022-11-22 01:30:30,679 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:30:30,691 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-22 01:30:30,691 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 [2022-11-22 01:30:30,716 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:30:30,728 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-22 01:30:30,729 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 [2022-11-22 01:30:30,808 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:30:30,808 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 [2022-11-22 01:30:30,879 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:30:30,880 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 [2022-11-22 01:30:30,975 INFO L321 Elim1Store]: treesize reduction 29, result has 59.7 percent of original size [2022-11-22 01:30:30,975 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 [2022-11-22 01:30:31,073 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2022-11-22 01:30:31,177 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:30:31,178 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:30:31,216 INFO L321 Elim1Store]: treesize reduction 25, result has 59.7 percent of original size [2022-11-22 01:30:31,216 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 [2022-11-22 01:30:31,287 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:30:31,288 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:30:31,297 INFO L321 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-11-22 01:30:31,297 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 [2022-11-22 01:30:31,423 INFO L321 Elim1Store]: treesize reduction 22, result has 59.3 percent of original size [2022-11-22 01:30:31,423 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 [2022-11-22 01:30:31,498 INFO L321 Elim1Store]: treesize reduction 27, result has 61.4 percent of original size [2022-11-22 01:30:31,498 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 [2022-11-22 01:30:31,631 INFO L321 Elim1Store]: treesize reduction 22, result has 59.3 percent of original size [2022-11-22 01:30:31,631 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 [2022-11-22 01:30:31,705 INFO L321 Elim1Store]: treesize reduction 27, result has 61.4 percent of original size [2022-11-22 01:30:31,706 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 [2022-11-22 01:30:31,872 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:30:31,872 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 [2022-11-22 01:30:31,913 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:30:31,914 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 [2022-11-22 01:30:32,073 INFO L321 Elim1Store]: treesize reduction 22, result has 59.3 percent of original size [2022-11-22 01:30:32,073 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 [2022-11-22 01:30:32,160 INFO L321 Elim1Store]: treesize reduction 27, result has 61.4 percent of original size [2022-11-22 01:30:32,160 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 [2022-11-22 01:30:32,318 INFO L321 Elim1Store]: treesize reduction 22, result has 59.3 percent of original size [2022-11-22 01:30:32,319 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 [2022-11-22 01:30:32,410 INFO L321 Elim1Store]: treesize reduction 27, result has 61.4 percent of original size [2022-11-22 01:30:32,411 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 69 treesize of output 77 [2022-11-22 01:30:32,712 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:30:32,712 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 [2022-11-22 01:30:32,774 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:30:32,775 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 [2022-11-22 01:30:32,897 INFO L321 Elim1Store]: treesize reduction 22, result has 59.3 percent of original size [2022-11-22 01:30:32,897 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 [2022-11-22 01:30:32,972 INFO L321 Elim1Store]: treesize reduction 27, result has 61.4 percent of original size [2022-11-22 01:30:32,972 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 [2022-11-22 01:30:33,106 INFO L321 Elim1Store]: treesize reduction 22, result has 59.3 percent of original size [2022-11-22 01:30:33,106 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 [2022-11-22 01:30:33,192 INFO L321 Elim1Store]: treesize reduction 27, result has 61.4 percent of original size [2022-11-22 01:30:33,192 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 [2022-11-22 01:30:33,386 INFO L197 IcfgInterpreter]: Interpreting procedure #Ultimate.meminit with input of size 70 for LOIs [2022-11-22 01:30:33,411 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 8 for LOIs [2022-11-22 01:30:33,412 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 01:30:40,850 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 [2022-11-22 01:30:40,850 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-22 01:30:40,851 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-22 01:30:40,851 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 12 [2022-11-22 01:30:40,851 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [837223341] [2022-11-22 01:30:40,851 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-22 01:30:40,851 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-22 01:30:40,851 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:30:40,852 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-22 01:30:40,852 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=258, Invalid=1548, Unknown=0, NotChecked=0, Total=1806 [2022-11-22 01:30:40,852 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) [2022-11-22 01:30:41,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:30:41,046 INFO L93 Difference]: Finished difference Result 150 states and 174 transitions. [2022-11-22 01:30:41,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-22 01:30:41,046 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 [2022-11-22 01:30:41,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:30:41,048 INFO L225 Difference]: With dead ends: 150 [2022-11-22 01:30:41,048 INFO L226 Difference]: Without dead ends: 150 [2022-11-22 01:30:41,048 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 101 SyntacticMatches, 2 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 609 ImplicationChecksByTransitivity, 7.6s TimeCoverageRelationStatistics Valid=305, Invalid=1951, Unknown=0, NotChecked=0, Total=2256 [2022-11-22 01:30:41,048 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 160 mSDsluCounter, 158 mSDsCounter, 0 mSdLazyCounter, 186 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 160 SdHoareTripleChecker+Valid, 189 SdHoareTripleChecker+Invalid, 190 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 186 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-22 01:30:41,049 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [160 Valid, 189 Invalid, 190 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 186 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-22 01:30:41,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2022-11-22 01:30:41,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 147. [2022-11-22 01:30:41,052 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) [2022-11-22 01:30:41,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 173 transitions. [2022-11-22 01:30:41,053 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 173 transitions. Word has length 46 [2022-11-22 01:30:41,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:30:41,053 INFO L495 AbstractCegarLoop]: Abstraction has 147 states and 173 transitions. [2022-11-22 01:30:41,054 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) [2022-11-22 01:30:41,054 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 173 transitions. [2022-11-22 01:30:41,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-11-22 01:30:41,054 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:30:41,055 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] [2022-11-22 01:30:41,067 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0dd9036d-146f-4358-9ac0-018e53d6ce12/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2022-11-22 01:30:41,267 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0dd9036d-146f-4358-9ac0-018e53d6ce12/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2022-11-22 01:30:41,268 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)] === [2022-11-22 01:30:41,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:30:41,268 INFO L85 PathProgramCache]: Analyzing trace with hash -1177533864, now seen corresponding path program 1 times [2022-11-22 01:30:41,269 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:30:41,269 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [168966028] [2022-11-22 01:30:41,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:30:41,269 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:30:41,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:30:44,304 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-22 01:30:44,304 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:30:44,304 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [168966028] [2022-11-22 01:30:44,304 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [168966028] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 01:30:44,304 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1133445168] [2022-11-22 01:30:44,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:30:44,305 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:30:44,305 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0dd9036d-146f-4358-9ac0-018e53d6ce12/bin/utaipan-g80aRyZoba/z3 [2022-11-22 01:30:44,307 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0dd9036d-146f-4358-9ac0-018e53d6ce12/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 01:30:44,310 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0dd9036d-146f-4358-9ac0-018e53d6ce12/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-11-22 01:30:44,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:30:44,448 INFO L263 TraceCheckSpWp]: Trace formula consists of 321 conjuncts, 61 conjunts are in the unsatisfiable core [2022-11-22 01:30:44,452 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:30:44,805 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2022-11-22 01:30:45,084 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:30:45,085 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 [2022-11-22 01:30:45,197 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-22 01:30:45,441 INFO L321 Elim1Store]: treesize reduction 7, result has 30.0 percent of original size [2022-11-22 01:30:45,442 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 [2022-11-22 01:30:45,491 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-22 01:30:45,491 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 01:30:45,614 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 [2022-11-22 01:30:46,064 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 [2022-11-22 01:30:46,070 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 [2022-11-22 01:30:46,410 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-22 01:30:46,410 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1133445168] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 01:30:46,410 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [725013043] [2022-11-22 01:30:46,412 INFO L159 IcfgInterpreter]: Started Sifa with 35 locations of interest [2022-11-22 01:30:46,412 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 01:30:46,412 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 01:30:46,412 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 01:30:46,412 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 01:30:46,609 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-11-22 01:30:46,621 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 [2022-11-22 01:30:46,657 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2022-11-22 01:30:46,759 INFO L321 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2022-11-22 01:30:46,759 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 [2022-11-22 01:30:46,787 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-22 01:30:46,788 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 [2022-11-22 01:30:46,877 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 [2022-11-22 01:30:46,888 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-22 01:30:46,996 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 [2022-11-22 01:30:47,007 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-22 01:30:47,105 INFO L321 Elim1Store]: treesize reduction 38, result has 11.6 percent of original size [2022-11-22 01:30:47,105 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 [2022-11-22 01:30:47,175 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:30:47,187 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-22 01:30:47,187 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 [2022-11-22 01:30:47,229 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:30:47,241 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-22 01:30:47,242 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 [2022-11-22 01:30:47,276 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:30:47,288 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-22 01:30:47,289 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 [2022-11-22 01:30:47,361 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:30:47,362 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 34 treesize of output 26 [2022-11-22 01:30:47,440 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:30:47,441 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 [2022-11-22 01:30:47,504 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:30:47,505 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 [2022-11-22 01:30:47,592 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2022-11-22 01:30:47,715 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:30:47,717 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:30:47,751 INFO L321 Elim1Store]: treesize reduction 25, result has 59.7 percent of original size [2022-11-22 01:30:47,751 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 [2022-11-22 01:30:47,821 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:30:47,822 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:30:47,831 INFO L321 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2022-11-22 01:30:47,831 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 [2022-11-22 01:30:47,969 INFO L321 Elim1Store]: treesize reduction 22, result has 59.3 percent of original size [2022-11-22 01:30:47,969 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 33 treesize of output 45 [2022-11-22 01:30:48,043 INFO L321 Elim1Store]: treesize reduction 27, result has 61.4 percent of original size [2022-11-22 01:30:48,043 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 [2022-11-22 01:30:48,157 INFO L321 Elim1Store]: treesize reduction 22, result has 59.3 percent of original size [2022-11-22 01:30:48,157 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 33 treesize of output 45 [2022-11-22 01:30:48,234 INFO L321 Elim1Store]: treesize reduction 27, result has 61.4 percent of original size [2022-11-22 01:30:48,234 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 69 treesize of output 77 [2022-11-22 01:30:48,399 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:30:48,399 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 [2022-11-22 01:30:48,452 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:30:48,453 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 [2022-11-22 01:30:48,565 INFO L321 Elim1Store]: treesize reduction 22, result has 59.3 percent of original size [2022-11-22 01:30:48,566 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 [2022-11-22 01:30:48,647 INFO L321 Elim1Store]: treesize reduction 27, result has 61.4 percent of original size [2022-11-22 01:30:48,648 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 [2022-11-22 01:30:48,793 INFO L321 Elim1Store]: treesize reduction 22, result has 59.3 percent of original size [2022-11-22 01:30:48,793 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 [2022-11-22 01:30:48,879 INFO L321 Elim1Store]: treesize reduction 27, result has 61.4 percent of original size [2022-11-22 01:30:48,879 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 [2022-11-22 01:30:49,029 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:30:49,029 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 [2022-11-22 01:30:49,083 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:30:49,084 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 [2022-11-22 01:30:49,202 INFO L321 Elim1Store]: treesize reduction 22, result has 59.3 percent of original size [2022-11-22 01:30:49,203 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 [2022-11-22 01:30:49,266 INFO L321 Elim1Store]: treesize reduction 27, result has 61.4 percent of original size [2022-11-22 01:30:49,266 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 69 treesize of output 77 [2022-11-22 01:30:49,403 INFO L321 Elim1Store]: treesize reduction 22, result has 59.3 percent of original size [2022-11-22 01:30:49,403 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 [2022-11-22 01:30:49,480 INFO L321 Elim1Store]: treesize reduction 27, result has 61.4 percent of original size [2022-11-22 01:30:49,481 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 [2022-11-22 01:30:49,768 INFO L197 IcfgInterpreter]: Interpreting procedure #Ultimate.meminit with input of size 70 for LOIs [2022-11-22 01:30:49,793 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 8 for LOIs [2022-11-22 01:30:49,794 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 01:31:01,617 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 [2022-11-22 01:31:01,617 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-22 01:31:01,617 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-22 01:31:01,617 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 16, 14] total 47 [2022-11-22 01:31:01,617 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [426513268] [2022-11-22 01:31:01,617 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-22 01:31:01,618 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-11-22 01:31:01,618 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:31:01,618 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-11-22 01:31:01,619 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=387, Invalid=5775, Unknown=0, NotChecked=0, Total=6162 [2022-11-22 01:31:01,619 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) [2022-11-22 01:31:17,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:31:17,273 INFO L93 Difference]: Finished difference Result 205 states and 236 transitions. [2022-11-22 01:31:17,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-11-22 01:31:17,273 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 [2022-11-22 01:31:17,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:31:17,274 INFO L225 Difference]: With dead ends: 205 [2022-11-22 01:31:17,275 INFO L226 Difference]: Without dead ends: 205 [2022-11-22 01:31:17,276 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 85 SyntacticMatches, 6 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 3384 ImplicationChecksByTransitivity, 27.5s TimeCoverageRelationStatistics Valid=911, Invalid=11521, Unknown=0, NotChecked=0, Total=12432 [2022-11-22 01:31:17,276 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 629 mSDsluCounter, 359 mSDsCounter, 0 mSdLazyCounter, 1644 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 631 SdHoareTripleChecker+Valid, 374 SdHoareTripleChecker+Invalid, 1679 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 1644 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2022-11-22 01:31:17,276 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [631 Valid, 374 Invalid, 1679 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 1644 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2022-11-22 01:31:17,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2022-11-22 01:31:17,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 159. [2022-11-22 01:31:17,280 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) [2022-11-22 01:31:17,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 187 transitions. [2022-11-22 01:31:17,281 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 187 transitions. Word has length 47 [2022-11-22 01:31:17,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:31:17,281 INFO L495 AbstractCegarLoop]: Abstraction has 159 states and 187 transitions. [2022-11-22 01:31:17,281 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) [2022-11-22 01:31:17,282 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 187 transitions. [2022-11-22 01:31:17,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-11-22 01:31:17,282 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:31:17,282 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] [2022-11-22 01:31:17,298 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0dd9036d-146f-4358-9ac0-018e53d6ce12/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2022-11-22 01:31:17,488 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0dd9036d-146f-4358-9ac0-018e53d6ce12/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:31:17,488 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)] === [2022-11-22 01:31:17,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:31:17,489 INFO L85 PathProgramCache]: Analyzing trace with hash -2143807264, now seen corresponding path program 1 times [2022-11-22 01:31:17,489 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:31:17,489 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1195671644] [2022-11-22 01:31:17,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:31:17,489 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:31:17,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:31:17,592 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-11-22 01:31:17,592 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:31:17,592 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1195671644] [2022-11-22 01:31:17,593 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1195671644] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 01:31:17,593 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 01:31:17,593 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-22 01:31:17,593 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1442877043] [2022-11-22 01:31:17,593 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:31:17,594 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-22 01:31:17,594 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:31:17,594 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-22 01:31:17,594 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-22 01:31:17,594 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) [2022-11-22 01:31:17,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:31:17,683 INFO L93 Difference]: Finished difference Result 158 states and 186 transitions. [2022-11-22 01:31:17,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-22 01:31:17,683 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 [2022-11-22 01:31:17,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:31:17,684 INFO L225 Difference]: With dead ends: 158 [2022-11-22 01:31:17,684 INFO L226 Difference]: Without dead ends: 158 [2022-11-22 01:31:17,684 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 [2022-11-22 01:31:17,685 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, 0.1s IncrementalHoareTripleChecker+Time [2022-11-22 01:31:17,685 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [63 Valid, 62 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 63 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-22 01:31:17,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2022-11-22 01:31:17,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 158. [2022-11-22 01:31:17,688 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) [2022-11-22 01:31:17,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 186 transitions. [2022-11-22 01:31:17,688 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 186 transitions. Word has length 48 [2022-11-22 01:31:17,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:31:17,688 INFO L495 AbstractCegarLoop]: Abstraction has 158 states and 186 transitions. [2022-11-22 01:31:17,689 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) [2022-11-22 01:31:17,689 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 186 transitions. [2022-11-22 01:31:17,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-11-22 01:31:17,690 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:31:17,690 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] [2022-11-22 01:31:17,690 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2022-11-22 01:31:17,690 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)] === [2022-11-22 01:31:17,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:31:17,691 INFO L85 PathProgramCache]: Analyzing trace with hash -2143807263, now seen corresponding path program 1 times [2022-11-22 01:31:17,691 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:31:17,691 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [469607476] [2022-11-22 01:31:17,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:31:17,691 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:31:17,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:31:18,011 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-22 01:31:18,011 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:31:18,011 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [469607476] [2022-11-22 01:31:18,011 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [469607476] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 01:31:18,011 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [331999031] [2022-11-22 01:31:18,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:31:18,012 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:31:18,012 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0dd9036d-146f-4358-9ac0-018e53d6ce12/bin/utaipan-g80aRyZoba/z3 [2022-11-22 01:31:18,015 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0dd9036d-146f-4358-9ac0-018e53d6ce12/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 01:31:18,043 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0dd9036d-146f-4358-9ac0-018e53d6ce12/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-11-22 01:31:18,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:31:18,172 INFO L263 TraceCheckSpWp]: Trace formula consists of 321 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-22 01:31:18,174 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:31:18,367 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-22 01:31:18,368 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 01:31:18,488 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 [2022-11-22 01:31:18,558 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-22 01:31:18,558 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [331999031] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 01:31:18,558 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [926444785] [2022-11-22 01:31:18,560 INFO L159 IcfgInterpreter]: Started Sifa with 36 locations of interest [2022-11-22 01:31:18,560 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 01:31:18,560 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 01:31:18,560 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 01:31:18,560 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 01:31:18,827 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-11-22 01:31:18,833 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 [2022-11-22 01:31:18,877 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 6 [2022-11-22 01:31:18,963 INFO L321 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2022-11-22 01:31:18,964 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 [2022-11-22 01:31:18,991 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-22 01:31:18,992 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 [2022-11-22 01:31:19,097 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 [2022-11-22 01:31:19,109 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-22 01:31:19,211 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 [2022-11-22 01:31:19,222 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-22 01:31:19,323 INFO L321 Elim1Store]: treesize reduction 38, result has 11.6 percent of original size [2022-11-22 01:31:19,323 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 [2022-11-22 01:31:19,405 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:31:19,416 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-22 01:31:19,417 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 [2022-11-22 01:31:19,458 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:31:19,470 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-22 01:31:19,470 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-22 01:31:19,495 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:31:19,507 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-22 01:31:19,507 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 [2022-11-22 01:31:19,586 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:31:19,587 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 34 treesize of output 26 [2022-11-22 01:31:19,659 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:31:19,660 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 [2022-11-22 01:31:19,735 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:31:19,736 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 [2022-11-22 01:31:19,820 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2022-11-22 01:31:19,925 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:31:19,926 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:31:19,962 INFO L321 Elim1Store]: treesize reduction 25, result has 59.7 percent of original size [2022-11-22 01:31:19,962 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 [2022-11-22 01:31:20,016 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:31:20,017 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:31:20,027 INFO L321 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2022-11-22 01:31:20,027 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 1 case distinctions, treesize of input 101 treesize of output 76 [2022-11-22 01:31:20,182 INFO L321 Elim1Store]: treesize reduction 22, result has 59.3 percent of original size [2022-11-22 01:31:20,182 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 [2022-11-22 01:31:20,254 INFO L321 Elim1Store]: treesize reduction 27, result has 61.4 percent of original size [2022-11-22 01:31:20,255 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 [2022-11-22 01:31:20,375 INFO L321 Elim1Store]: treesize reduction 22, result has 59.3 percent of original size [2022-11-22 01:31:20,375 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 33 treesize of output 45 [2022-11-22 01:31:20,450 INFO L321 Elim1Store]: treesize reduction 27, result has 61.4 percent of original size [2022-11-22 01:31:20,450 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 [2022-11-22 01:31:20,618 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:31:20,618 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 45 treesize of output 28 [2022-11-22 01:31:20,668 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:31:20,669 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 [2022-11-22 01:31:20,790 INFO L321 Elim1Store]: treesize reduction 22, result has 59.3 percent of original size [2022-11-22 01:31:20,790 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 [2022-11-22 01:31:20,873 INFO L321 Elim1Store]: treesize reduction 27, result has 61.4 percent of original size [2022-11-22 01:31:20,874 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 [2022-11-22 01:31:21,002 INFO L321 Elim1Store]: treesize reduction 22, result has 59.3 percent of original size [2022-11-22 01:31:21,002 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 [2022-11-22 01:31:21,075 INFO L321 Elim1Store]: treesize reduction 27, result has 61.4 percent of original size [2022-11-22 01:31:21,075 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 [2022-11-22 01:31:21,216 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:31:21,217 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 [2022-11-22 01:31:21,277 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:31:21,278 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 [2022-11-22 01:31:21,404 INFO L321 Elim1Store]: treesize reduction 22, result has 59.3 percent of original size [2022-11-22 01:31:21,404 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 [2022-11-22 01:31:21,474 INFO L321 Elim1Store]: treesize reduction 27, result has 61.4 percent of original size [2022-11-22 01:31:21,474 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 [2022-11-22 01:31:21,639 INFO L321 Elim1Store]: treesize reduction 22, result has 59.3 percent of original size [2022-11-22 01:31:21,640 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 [2022-11-22 01:31:21,706 INFO L321 Elim1Store]: treesize reduction 27, result has 61.4 percent of original size [2022-11-22 01:31:21,707 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 [2022-11-22 01:31:22,019 INFO L197 IcfgInterpreter]: Interpreting procedure #Ultimate.meminit with input of size 70 for LOIs [2022-11-22 01:31:22,047 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 8 for LOIs [2022-11-22 01:31:22,049 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 01:31:32,127 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 [2022-11-22 01:31:32,127 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-22 01:31:32,128 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-22 01:31:32,128 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 14 [2022-11-22 01:31:32,128 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [647480318] [2022-11-22 01:31:32,128 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-22 01:31:32,128 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-11-22 01:31:32,128 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:31:32,128 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-11-22 01:31:32,129 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=332, Invalid=2020, Unknown=0, NotChecked=0, Total=2352 [2022-11-22 01:31:32,129 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) [2022-11-22 01:31:32,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:31:32,491 INFO L93 Difference]: Finished difference Result 165 states and 191 transitions. [2022-11-22 01:31:32,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-22 01:31:32,491 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 [2022-11-22 01:31:32,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:31:32,492 INFO L225 Difference]: With dead ends: 165 [2022-11-22 01:31:32,492 INFO L226 Difference]: Without dead ends: 165 [2022-11-22 01:31:32,492 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 99 SyntacticMatches, 2 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 828 ImplicationChecksByTransitivity, 10.4s TimeCoverageRelationStatistics Valid=391, Invalid=2471, Unknown=0, NotChecked=0, Total=2862 [2022-11-22 01:31:32,493 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 182 mSDsluCounter, 115 mSDsCounter, 0 mSdLazyCounter, 250 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 182 SdHoareTripleChecker+Valid, 139 SdHoareTripleChecker+Invalid, 254 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 250 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-22 01:31:32,493 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [182 Valid, 139 Invalid, 254 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 250 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-22 01:31:32,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2022-11-22 01:31:32,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 161. [2022-11-22 01:31:32,496 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) [2022-11-22 01:31:32,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 189 transitions. [2022-11-22 01:31:32,497 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 189 transitions. Word has length 48 [2022-11-22 01:31:32,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:31:32,497 INFO L495 AbstractCegarLoop]: Abstraction has 161 states and 189 transitions. [2022-11-22 01:31:32,497 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) [2022-11-22 01:31:32,498 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 189 transitions. [2022-11-22 01:31:32,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-11-22 01:31:32,498 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:31:32,498 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] [2022-11-22 01:31:32,512 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0dd9036d-146f-4358-9ac0-018e53d6ce12/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2022-11-22 01:31:32,704 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0dd9036d-146f-4358-9ac0-018e53d6ce12/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2022-11-22 01:31:32,705 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)] === [2022-11-22 01:31:32,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:31:32,705 INFO L85 PathProgramCache]: Analyzing trace with hash -1502172590, now seen corresponding path program 3 times [2022-11-22 01:31:32,705 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:31:32,705 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [139547622] [2022-11-22 01:31:32,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:31:32,705 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:31:32,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:31:32,951 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 6 proven. 37 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-22 01:31:32,952 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:31:32,952 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [139547622] [2022-11-22 01:31:32,952 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [139547622] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 01:31:32,952 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [927422481] [2022-11-22 01:31:32,952 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-22 01:31:32,952 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:31:32,952 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0dd9036d-146f-4358-9ac0-018e53d6ce12/bin/utaipan-g80aRyZoba/z3 [2022-11-22 01:31:32,953 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0dd9036d-146f-4358-9ac0-018e53d6ce12/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 01:31:32,979 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0dd9036d-146f-4358-9ac0-018e53d6ce12/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-11-22 01:31:33,120 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-22 01:31:33,120 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-22 01:31:33,121 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-22 01:31:33,123 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:31:33,292 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 16 proven. 26 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-22 01:31:33,292 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 01:31:33,470 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-22 01:31:33,470 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [927422481] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 01:31:33,470 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [653872159] [2022-11-22 01:31:33,471 INFO L159 IcfgInterpreter]: Started Sifa with 23 locations of interest [2022-11-22 01:31:33,471 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 01:31:33,471 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 01:31:33,472 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 01:31:33,472 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 01:31:33,712 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 [2022-11-22 01:31:33,724 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-11-22 01:31:33,757 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2022-11-22 01:31:33,845 INFO L321 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2022-11-22 01:31:33,845 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 [2022-11-22 01:31:33,876 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-22 01:31:33,877 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 [2022-11-22 01:31:33,988 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 [2022-11-22 01:31:33,999 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-22 01:31:34,076 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 [2022-11-22 01:31:34,087 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-22 01:31:34,174 INFO L321 Elim1Store]: treesize reduction 38, result has 11.6 percent of original size [2022-11-22 01:31:34,174 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 2 new quantified variables, introduced 3 case distinctions, treesize of input 210 treesize of output 206 [2022-11-22 01:31:34,244 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:31:34,255 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-22 01:31:34,256 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 [2022-11-22 01:31:34,299 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:31:34,311 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-22 01:31:34,311 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 [2022-11-22 01:31:34,335 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:31:34,347 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-22 01:31:34,347 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 [2022-11-22 01:31:34,415 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:31:34,416 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 [2022-11-22 01:31:34,513 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:31:34,513 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 [2022-11-22 01:31:34,608 INFO L321 Elim1Store]: treesize reduction 29, result has 59.7 percent of original size [2022-11-22 01:31:34,609 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 [2022-11-22 01:31:34,762 INFO L197 IcfgInterpreter]: Interpreting procedure #Ultimate.meminit with input of size 70 for LOIs [2022-11-22 01:31:34,789 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 8 for LOIs [2022-11-22 01:31:34,791 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 01:31:38,628 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 [2022-11-22 01:31:38,629 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-22 01:31:38,629 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-22 01:31:38,629 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11] total 22 [2022-11-22 01:31:38,629 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [650945992] [2022-11-22 01:31:38,629 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-22 01:31:38,629 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-11-22 01:31:38,629 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:31:38,630 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-11-22 01:31:38,630 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=195, Invalid=1697, Unknown=0, NotChecked=0, Total=1892 [2022-11-22 01:31:38,630 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) [2022-11-22 01:31:39,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:31:39,071 INFO L93 Difference]: Finished difference Result 276 states and 318 transitions. [2022-11-22 01:31:39,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-11-22 01:31:39,072 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 [2022-11-22 01:31:39,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:31:39,073 INFO L225 Difference]: With dead ends: 276 [2022-11-22 01:31:39,073 INFO L226 Difference]: Without dead ends: 276 [2022-11-22 01:31:39,074 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 115 SyntacticMatches, 4 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 785 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=314, Invalid=2442, Unknown=0, NotChecked=0, Total=2756 [2022-11-22 01:31:39,074 INFO L413 NwaCegarLoop]: 47 mSDtfsCounter, 521 mSDsluCounter, 370 mSDsCounter, 0 mSdLazyCounter, 365 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 521 SdHoareTripleChecker+Valid, 417 SdHoareTripleChecker+Invalid, 388 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 365 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-22 01:31:39,074 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [521 Valid, 417 Invalid, 388 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 365 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-22 01:31:39,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 276 states. [2022-11-22 01:31:39,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 276 to 171. [2022-11-22 01:31:39,079 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) [2022-11-22 01:31:39,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 202 transitions. [2022-11-22 01:31:39,079 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 202 transitions. Word has length 50 [2022-11-22 01:31:39,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:31:39,080 INFO L495 AbstractCegarLoop]: Abstraction has 171 states and 202 transitions. [2022-11-22 01:31:39,080 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) [2022-11-22 01:31:39,080 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 202 transitions. [2022-11-22 01:31:39,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-11-22 01:31:39,081 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:31:39,081 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] [2022-11-22 01:31:39,095 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0dd9036d-146f-4358-9ac0-018e53d6ce12/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2022-11-22 01:31:39,287 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45,32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0dd9036d-146f-4358-9ac0-018e53d6ce12/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:31:39,288 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)] === [2022-11-22 01:31:39,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:31:39,288 INFO L85 PathProgramCache]: Analyzing trace with hash -336926923, now seen corresponding path program 4 times [2022-11-22 01:31:39,288 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:31:39,288 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [682061872] [2022-11-22 01:31:39,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:31:39,289 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:31:39,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:31:39,507 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 11 proven. 38 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-22 01:31:39,508 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:31:39,508 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [682061872] [2022-11-22 01:31:39,508 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [682061872] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 01:31:39,508 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1847628748] [2022-11-22 01:31:39,508 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-22 01:31:39,509 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:31:39,509 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0dd9036d-146f-4358-9ac0-018e53d6ce12/bin/utaipan-g80aRyZoba/z3 [2022-11-22 01:31:39,511 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0dd9036d-146f-4358-9ac0-018e53d6ce12/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 01:31:39,535 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0dd9036d-146f-4358-9ac0-018e53d6ce12/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2022-11-22 01:31:39,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:31:39,667 INFO L263 TraceCheckSpWp]: Trace formula consists of 307 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-22 01:31:39,668 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:31:39,806 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 26 proven. 22 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-22 01:31:39,806 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 01:31:39,941 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 11 proven. 37 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-22 01:31:39,941 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1847628748] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 01:31:39,942 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1860008048] [2022-11-22 01:31:39,943 INFO L159 IcfgInterpreter]: Started Sifa with 23 locations of interest [2022-11-22 01:31:39,943 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 01:31:39,943 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 01:31:39,943 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 01:31:39,943 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 01:31:40,236 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-11-22 01:31:40,248 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 [2022-11-22 01:31:40,281 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2022-11-22 01:31:40,370 INFO L321 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2022-11-22 01:31:40,371 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 [2022-11-22 01:31:40,397 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-22 01:31:40,398 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 [2022-11-22 01:31:40,490 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 [2022-11-22 01:31:40,501 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-22 01:31:40,578 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 [2022-11-22 01:31:40,589 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-22 01:31:40,641 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 [2022-11-22 01:31:40,744 INFO L321 Elim1Store]: treesize reduction 84, result has 9.7 percent of original size [2022-11-22 01:31:40,744 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 259 treesize of output 256 [2022-11-22 01:31:40,821 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:31:40,833 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-22 01:31:40,834 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 [2022-11-22 01:31:40,857 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:31:40,869 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-22 01:31:40,869 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 [2022-11-22 01:31:41,116 INFO L321 Elim1Store]: treesize reduction 76, result has 31.5 percent of original size [2022-11-22 01:31:41,117 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 [2022-11-22 01:31:41,411 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:31:41,412 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:31:41,414 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:31:41,443 INFO L321 Elim1Store]: treesize reduction 28, result has 60.6 percent of original size [2022-11-22 01:31:41,443 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 [2022-11-22 01:31:41,511 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:31:41,512 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:31:41,515 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:31:41,552 INFO L321 Elim1Store]: treesize reduction 28, result has 60.6 percent of original size [2022-11-22 01:31:41,553 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 [2022-11-22 01:31:41,649 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:31:41,651 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:31:41,685 INFO L321 Elim1Store]: treesize reduction 28, result has 60.6 percent of original size [2022-11-22 01:31:41,685 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 [2022-11-22 01:31:41,772 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:31:41,774 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:31:41,813 INFO L321 Elim1Store]: treesize reduction 28, result has 60.6 percent of original size [2022-11-22 01:31:41,814 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 [2022-11-22 01:31:42,034 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:31:42,035 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 [2022-11-22 01:31:42,100 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:31:42,101 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 [2022-11-22 01:31:42,253 INFO L197 IcfgInterpreter]: Interpreting procedure #Ultimate.meminit with input of size 70 for LOIs [2022-11-22 01:31:42,289 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 8 for LOIs [2022-11-22 01:31:42,290 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 01:31:46,434 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 [2022-11-22 01:31:46,434 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-22 01:31:46,434 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-22 01:31:46,434 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 10] total 18 [2022-11-22 01:31:46,434 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [971697448] [2022-11-22 01:31:46,434 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-22 01:31:46,435 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-22 01:31:46,435 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:31:46,435 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-22 01:31:46,435 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=1394, Unknown=0, NotChecked=0, Total=1560 [2022-11-22 01:31:46,435 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) [2022-11-22 01:31:46,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:31:46,941 INFO L93 Difference]: Finished difference Result 268 states and 309 transitions. [2022-11-22 01:31:46,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-22 01:31:46,941 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 [2022-11-22 01:31:46,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:31:46,943 INFO L225 Difference]: With dead ends: 268 [2022-11-22 01:31:46,943 INFO L226 Difference]: Without dead ends: 268 [2022-11-22 01:31:46,943 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 123 SyntacticMatches, 6 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 731 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=311, Invalid=2341, Unknown=0, NotChecked=0, Total=2652 [2022-11-22 01:31:46,943 INFO L413 NwaCegarLoop]: 47 mSDtfsCounter, 362 mSDsluCounter, 379 mSDsCounter, 0 mSdLazyCounter, 375 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 362 SdHoareTripleChecker+Valid, 426 SdHoareTripleChecker+Invalid, 386 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 375 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-22 01:31:46,944 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [362 Valid, 426 Invalid, 386 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 375 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-22 01:31:46,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 268 states. [2022-11-22 01:31:46,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 268 to 168. [2022-11-22 01:31:46,947 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) [2022-11-22 01:31:46,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 197 transitions. [2022-11-22 01:31:46,948 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 197 transitions. Word has length 52 [2022-11-22 01:31:46,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:31:46,948 INFO L495 AbstractCegarLoop]: Abstraction has 168 states and 197 transitions. [2022-11-22 01:31:46,948 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) [2022-11-22 01:31:46,948 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 197 transitions. [2022-11-22 01:31:46,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-11-22 01:31:46,949 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:31:46,949 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] [2022-11-22 01:31:46,955 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0dd9036d-146f-4358-9ac0-018e53d6ce12/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2022-11-22 01:31:47,149 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46,33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0dd9036d-146f-4358-9ac0-018e53d6ce12/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:31:47,150 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)] === [2022-11-22 01:31:47,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:31:47,150 INFO L85 PathProgramCache]: Analyzing trace with hash 99439032, now seen corresponding path program 1 times [2022-11-22 01:31:47,150 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:31:47,150 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1257897693] [2022-11-22 01:31:47,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:31:47,150 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:31:47,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:31:51,017 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 1 proven. 14 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-22 01:31:51,017 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:31:51,017 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1257897693] [2022-11-22 01:31:51,017 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1257897693] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 01:31:51,017 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [834081479] [2022-11-22 01:31:51,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:31:51,017 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:31:51,018 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0dd9036d-146f-4358-9ac0-018e53d6ce12/bin/utaipan-g80aRyZoba/z3 [2022-11-22 01:31:51,018 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0dd9036d-146f-4358-9ac0-018e53d6ce12/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 01:31:51,023 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0dd9036d-146f-4358-9ac0-018e53d6ce12/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2022-11-22 01:31:51,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:31:51,170 INFO L263 TraceCheckSpWp]: Trace formula consists of 342 conjuncts, 128 conjunts are in the unsatisfiable core [2022-11-22 01:31:51,174 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:31:51,181 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-22 01:31:51,240 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 7 treesize of output 6 [2022-11-22 01:31:51,324 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-22 01:31:51,325 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-11-22 01:31:51,381 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 [2022-11-22 01:31:51,388 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 [2022-11-22 01:31:51,532 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 [2022-11-22 01:31:51,537 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 [2022-11-22 01:31:51,703 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 [2022-11-22 01:31:51,719 INFO L321 Elim1Store]: treesize reduction 21, result has 25.0 percent of original size [2022-11-22 01:31:51,719 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 [2022-11-22 01:31:52,169 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 [2022-11-22 01:31:52,571 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 [2022-11-22 01:31:53,789 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 [2022-11-22 01:31:54,018 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 108 treesize of output 106 [2022-11-22 01:32:01,361 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 [2022-11-22 01:32:01,367 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 [2022-11-22 01:32:01,474 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 3 trivial. 1 not checked. [2022-11-22 01:32:01,474 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 01:34:35,036 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) (v_ArrVal_1058 Int) (|v_ULTIMATE.start_downsweep_~n#1_29| Int)) (let ((.cse0 (store |c_#memory_int| |c_ULTIMATE.start_main_~a0~0#1.base| (store (select |c_#memory_int| |c_ULTIMATE.start_main_~a0~0#1.base|) (+ |c_ULTIMATE.start_main_~a0~0#1.offset| (* |c_ULTIMATE.start_main_~i~1#1| 4)) v_ArrVal_1054)))) (let ((.cse1 (store (store (select .cse0 |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)) (.cse2 (+ |c_ULTIMATE.start_main_~a~0#1.offset| 4))) (let ((.cse4 (select .cse1 .cse2))) (or (let ((.cse3 (+ (select .cse1 |c_ULTIMATE.start_main_~a~0#1.offset|) .cse4))) (= (select (select (store .cse0 |c_ULTIMATE.start_main_~a~0#1.base| (store (store .cse1 .cse2 .cse3) |c_ULTIMATE.start_main_~a~0#1.offset| .cse4)) |c_ULTIMATE.start_main_~a0~0#1.base|) |c_ULTIMATE.start_main_~a0~0#1.offset|) .cse3)) (< |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 (= .cse4 0)) (< |v_ULTIMATE.start_downsweep_~n#1_29| (+ |c_ULTIMATE.start_main_~i~1#1| 1))))))) is different from false [2022-11-22 01:34:37,130 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 [2022-11-22 01:34:39,254 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 [2022-11-22 01:34:54,114 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 [2022-11-22 01:34:54,119 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [834081479] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 01:34:54,119 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1203064429] [2022-11-22 01:34:54,120 INFO L159 IcfgInterpreter]: Started Sifa with 37 locations of interest [2022-11-22 01:34:54,121 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 01:34:54,121 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 01:34:54,121 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 01:34:54,121 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 01:34:54,478 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-11-22 01:34:54,485 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 [2022-11-22 01:34:54,520 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2022-11-22 01:34:54,619 INFO L321 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2022-11-22 01:34:54,619 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 [2022-11-22 01:34:54,657 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-22 01:34:54,657 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 [2022-11-22 01:34:54,770 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 [2022-11-22 01:34:54,781 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-22 01:34:54,882 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 [2022-11-22 01:34:54,894 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-22 01:34:54,974 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 [2022-11-22 01:34:55,078 INFO L321 Elim1Store]: treesize reduction 84, result has 9.7 percent of original size [2022-11-22 01:34:55,079 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 [2022-11-22 01:34:55,155 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:34:55,169 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-22 01:34:55,169 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 [2022-11-22 01:34:55,194 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:34:55,208 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-22 01:34:55,208 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 [2022-11-22 01:34:55,497 INFO L321 Elim1Store]: treesize reduction 76, result has 31.5 percent of original size [2022-11-22 01:34:55,497 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 [2022-11-22 01:34:55,813 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:34:55,815 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:34:55,861 INFO L321 Elim1Store]: treesize reduction 28, result has 60.6 percent of original size [2022-11-22 01:34:55,861 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 [2022-11-22 01:34:55,893 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:34:55,895 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:34:55,946 INFO L321 Elim1Store]: treesize reduction 28, result has 60.6 percent of original size [2022-11-22 01:34:55,947 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 [2022-11-22 01:34:56,164 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:34:56,166 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:34:56,167 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:34:56,168 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:34:56,212 INFO L321 Elim1Store]: treesize reduction 28, result has 60.6 percent of original size [2022-11-22 01:34:56,212 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 [2022-11-22 01:34:56,269 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:34:56,271 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:34:56,273 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:34:56,273 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:34:56,324 INFO L321 Elim1Store]: treesize reduction 28, result has 60.6 percent of original size [2022-11-22 01:34:56,324 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 [2022-11-22 01:34:56,519 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:34:56,519 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 [2022-11-22 01:34:56,589 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:34:56,590 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 [2022-11-22 01:34:56,689 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2022-11-22 01:34:56,782 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:34:56,784 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:34:56,826 INFO L321 Elim1Store]: treesize reduction 25, result has 59.7 percent of original size [2022-11-22 01:34:56,827 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 [2022-11-22 01:34:56,890 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:34:56,891 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:34:56,901 INFO L321 Elim1Store]: treesize reduction 17, result has 5.6 percent of original size [2022-11-22 01:34:56,901 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 [2022-11-22 01:34:57,051 INFO L321 Elim1Store]: treesize reduction 22, result has 59.3 percent of original size [2022-11-22 01:34:57,051 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 [2022-11-22 01:34:57,141 INFO L321 Elim1Store]: treesize reduction 27, result has 61.4 percent of original size [2022-11-22 01:34:57,141 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 [2022-11-22 01:34:57,273 INFO L321 Elim1Store]: treesize reduction 22, result has 59.3 percent of original size [2022-11-22 01:34:57,275 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 [2022-11-22 01:34:57,364 INFO L321 Elim1Store]: treesize reduction 27, result has 61.4 percent of original size [2022-11-22 01:34:57,365 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 [2022-11-22 01:34:57,496 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:34:57,497 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 [2022-11-22 01:34:57,541 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:34:57,542 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 [2022-11-22 01:34:57,687 INFO L321 Elim1Store]: treesize reduction 43, result has 20.4 percent of original size [2022-11-22 01:34:57,687 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 [2022-11-22 01:34:57,770 INFO L321 Elim1Store]: treesize reduction 56, result has 20.0 percent of original size [2022-11-22 01:34:57,771 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 [2022-11-22 01:34:57,952 INFO L321 Elim1Store]: treesize reduction 22, result has 59.3 percent of original size [2022-11-22 01:34:57,952 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 45 [2022-11-22 01:34:58,029 INFO L321 Elim1Store]: treesize reduction 27, result has 61.4 percent of original size [2022-11-22 01:34:58,029 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 69 treesize of output 77 [2022-11-22 01:34:58,151 INFO L321 Elim1Store]: treesize reduction 22, result has 59.3 percent of original size [2022-11-22 01:34:58,151 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 [2022-11-22 01:34:58,251 INFO L321 Elim1Store]: treesize reduction 27, result has 61.4 percent of original size [2022-11-22 01:34:58,252 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 [2022-11-22 01:34:58,584 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:34:58,587 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 45 treesize of output 28 [2022-11-22 01:34:58,628 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:34:58,629 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 [2022-11-22 01:34:58,791 INFO L321 Elim1Store]: treesize reduction 43, result has 20.4 percent of original size [2022-11-22 01:34:58,791 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 [2022-11-22 01:34:58,868 INFO L321 Elim1Store]: treesize reduction 56, result has 20.0 percent of original size [2022-11-22 01:34:58,868 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 [2022-11-22 01:34:59,066 INFO L321 Elim1Store]: treesize reduction 22, result has 59.3 percent of original size [2022-11-22 01:34:59,066 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 33 treesize of output 45 [2022-11-22 01:34:59,151 INFO L321 Elim1Store]: treesize reduction 27, result has 61.4 percent of original size [2022-11-22 01:34:59,151 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 [2022-11-22 01:34:59,297 INFO L321 Elim1Store]: treesize reduction 22, result has 59.3 percent of original size [2022-11-22 01:34:59,298 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 [2022-11-22 01:34:59,385 INFO L321 Elim1Store]: treesize reduction 27, result has 61.4 percent of original size [2022-11-22 01:34:59,386 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 [2022-11-22 01:35:00,070 INFO L197 IcfgInterpreter]: Interpreting procedure #Ultimate.meminit with input of size 70 for LOIs [2022-11-22 01:35:00,095 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 8 for LOIs [2022-11-22 01:35:00,096 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 01:35:21,715 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 [2022-11-22 01:35:21,715 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-22 01:35:21,715 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-22 01:35:21,715 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 33] total 60 [2022-11-22 01:35:21,715 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1308637148] [2022-11-22 01:35:21,715 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-22 01:35:21,715 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 60 states [2022-11-22 01:35:21,716 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:35:21,716 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2022-11-22 01:35:21,718 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=612, Invalid=12465, Unknown=53, NotChecked=1150, Total=14280 [2022-11-22 01:35:21,719 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) [2022-11-22 01:35:44,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:35:44,012 INFO L93 Difference]: Finished difference Result 198 states and 227 transitions. [2022-11-22 01:35:44,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-11-22 01:35:44,013 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 [2022-11-22 01:35:44,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:35:44,014 INFO L225 Difference]: With dead ends: 198 [2022-11-22 01:35:44,014 INFO L226 Difference]: Without dead ends: 198 [2022-11-22 01:35:44,016 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 216 GetRequests, 55 SyntacticMatches, 1 SemanticMatches, 160 ConstructedPredicates, 5 IntricatePredicates, 0 DeprecatedPredicates, 7202 ImplicationChecksByTransitivity, 222.1s TimeCoverageRelationStatistics Valid=1734, Invalid=22724, Unknown=54, NotChecked=1570, Total=26082 [2022-11-22 01:35:44,016 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 720 mSDsluCounter, 524 mSDsCounter, 0 mSdLazyCounter, 2184 mSolverCounterSat, 86 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 723 SdHoareTripleChecker+Valid, 543 SdHoareTripleChecker+Invalid, 2358 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 86 IncrementalHoareTripleChecker+Valid, 2184 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 88 IncrementalHoareTripleChecker+Unchecked, 4.0s IncrementalHoareTripleChecker+Time [2022-11-22 01:35:44,017 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [723 Valid, 543 Invalid, 2358 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [86 Valid, 2184 Invalid, 0 Unknown, 88 Unchecked, 4.0s Time] [2022-11-22 01:35:44,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2022-11-22 01:35:44,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 164. [2022-11-22 01:35:44,019 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) [2022-11-22 01:35:44,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 191 transitions. [2022-11-22 01:35:44,020 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 191 transitions. Word has length 52 [2022-11-22 01:35:44,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:35:44,021 INFO L495 AbstractCegarLoop]: Abstraction has 164 states and 191 transitions. [2022-11-22 01:35:44,021 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) [2022-11-22 01:35:44,021 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 191 transitions. [2022-11-22 01:35:44,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-11-22 01:35:44,022 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:35:44,022 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] [2022-11-22 01:35:44,027 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0dd9036d-146f-4358-9ac0-018e53d6ce12/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2022-11-22 01:35:44,227 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0dd9036d-146f-4358-9ac0-018e53d6ce12/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2022-11-22 01:35:44,228 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)] === [2022-11-22 01:35:44,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:35:44,228 INFO L85 PathProgramCache]: Analyzing trace with hash 355882978, now seen corresponding path program 2 times [2022-11-22 01:35:44,228 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:35:44,228 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [822972474] [2022-11-22 01:35:44,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:35:44,229 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:35:44,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:35:44,361 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2022-11-22 01:35:44,362 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:35:44,362 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [822972474] [2022-11-22 01:35:44,362 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [822972474] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 01:35:44,362 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1782561160] [2022-11-22 01:35:44,362 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-22 01:35:44,362 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:35:44,362 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0dd9036d-146f-4358-9ac0-018e53d6ce12/bin/utaipan-g80aRyZoba/z3 [2022-11-22 01:35:44,367 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0dd9036d-146f-4358-9ac0-018e53d6ce12/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 01:35:44,390 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0dd9036d-146f-4358-9ac0-018e53d6ce12/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2022-11-22 01:35:44,519 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-22 01:35:44,520 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-22 01:35:44,521 INFO L263 TraceCheckSpWp]: Trace formula consists of 236 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-22 01:35:44,523 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:35:44,693 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-11-22 01:35:44,694 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 01:35:44,843 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-11-22 01:35:44,844 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1782561160] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 01:35:44,844 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [681389035] [2022-11-22 01:35:44,845 INFO L159 IcfgInterpreter]: Started Sifa with 31 locations of interest [2022-11-22 01:35:44,845 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 01:35:44,845 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 01:35:44,845 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 01:35:44,845 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 01:35:45,255 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 [2022-11-22 01:35:45,268 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-11-22 01:35:45,302 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2022-11-22 01:35:45,407 INFO L321 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2022-11-22 01:35:45,407 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 [2022-11-22 01:35:45,439 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-22 01:35:45,440 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 [2022-11-22 01:35:45,533 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 [2022-11-22 01:35:45,543 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-22 01:35:45,641 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 [2022-11-22 01:35:45,653 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-22 01:35:45,752 INFO L321 Elim1Store]: treesize reduction 38, result has 11.6 percent of original size [2022-11-22 01:35:45,752 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 [2022-11-22 01:35:45,832 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:35:45,846 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-22 01:35:45,846 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-22 01:35:45,897 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:35:45,911 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-22 01:35:45,912 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 [2022-11-22 01:35:45,933 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:35:45,947 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-22 01:35:45,948 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 [2022-11-22 01:35:46,034 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:35:46,035 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 [2022-11-22 01:35:46,107 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:35:46,108 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 [2022-11-22 01:35:46,211 INFO L321 Elim1Store]: treesize reduction 29, result has 59.7 percent of original size [2022-11-22 01:35:46,212 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 [2022-11-22 01:35:46,295 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2022-11-22 01:35:46,414 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:35:46,416 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:35:46,462 INFO L321 Elim1Store]: treesize reduction 25, result has 59.7 percent of original size [2022-11-22 01:35:46,462 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 [2022-11-22 01:35:46,525 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:35:46,526 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:35:46,536 INFO L321 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2022-11-22 01:35:46,536 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 [2022-11-22 01:35:46,669 INFO L321 Elim1Store]: treesize reduction 22, result has 59.3 percent of original size [2022-11-22 01:35:46,669 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 [2022-11-22 01:35:46,752 INFO L321 Elim1Store]: treesize reduction 27, result has 61.4 percent of original size [2022-11-22 01:35:46,753 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 [2022-11-22 01:35:46,900 INFO L321 Elim1Store]: treesize reduction 22, result has 59.3 percent of original size [2022-11-22 01:35:46,901 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 [2022-11-22 01:35:46,979 INFO L321 Elim1Store]: treesize reduction 27, result has 61.4 percent of original size [2022-11-22 01:35:46,979 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 [2022-11-22 01:35:47,211 INFO L197 IcfgInterpreter]: Interpreting procedure #Ultimate.meminit with input of size 70 for LOIs [2022-11-22 01:35:47,236 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 8 for LOIs [2022-11-22 01:35:47,237 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 01:35:54,077 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 [2022-11-22 01:35:54,077 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-22 01:35:54,077 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-22 01:35:54,077 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 17 [2022-11-22 01:35:54,077 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [913077162] [2022-11-22 01:35:54,077 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-22 01:35:54,078 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-11-22 01:35:54,078 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:35:54,078 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-11-22 01:35:54,078 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=213, Invalid=1857, Unknown=0, NotChecked=0, Total=2070 [2022-11-22 01:35:54,079 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) [2022-11-22 01:35:54,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:35:54,610 INFO L93 Difference]: Finished difference Result 186 states and 210 transitions. [2022-11-22 01:35:54,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-22 01:35:54,610 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 [2022-11-22 01:35:54,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:35:54,611 INFO L225 Difference]: With dead ends: 186 [2022-11-22 01:35:54,611 INFO L226 Difference]: Without dead ends: 186 [2022-11-22 01:35:54,611 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 946 ImplicationChecksByTransitivity, 7.3s TimeCoverageRelationStatistics Valid=318, Invalid=2762, Unknown=0, NotChecked=0, Total=3080 [2022-11-22 01:35:54,612 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 179 mSDsluCounter, 262 mSDsCounter, 0 mSdLazyCounter, 296 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 179 SdHoareTripleChecker+Valid, 295 SdHoareTripleChecker+Invalid, 305 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 296 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-22 01:35:54,612 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [179 Valid, 295 Invalid, 305 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 296 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-22 01:35:54,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2022-11-22 01:35:54,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 164. [2022-11-22 01:35:54,614 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) [2022-11-22 01:35:54,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 188 transitions. [2022-11-22 01:35:54,615 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 188 transitions. Word has length 53 [2022-11-22 01:35:54,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:35:54,615 INFO L495 AbstractCegarLoop]: Abstraction has 164 states and 188 transitions. [2022-11-22 01:35:54,616 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) [2022-11-22 01:35:54,616 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 188 transitions. [2022-11-22 01:35:54,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-11-22 01:35:54,616 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:35:54,617 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] [2022-11-22 01:35:54,622 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0dd9036d-146f-4358-9ac0-018e53d6ce12/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2022-11-22 01:35:54,827 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0dd9036d-146f-4358-9ac0-018e53d6ce12/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2022-11-22 01:35:54,828 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)] === [2022-11-22 01:35:54,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:35:54,828 INFO L85 PathProgramCache]: Analyzing trace with hash -1135186504, now seen corresponding path program 1 times [2022-11-22 01:35:54,828 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:35:54,828 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [970315362] [2022-11-22 01:35:54,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:35:54,828 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:35:54,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:35:55,068 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 3 proven. 12 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-22 01:35:55,069 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:35:55,069 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [970315362] [2022-11-22 01:35:55,069 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [970315362] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 01:35:55,069 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [825084808] [2022-11-22 01:35:55,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:35:55,069 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:35:55,069 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0dd9036d-146f-4358-9ac0-018e53d6ce12/bin/utaipan-g80aRyZoba/z3 [2022-11-22 01:35:55,070 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0dd9036d-146f-4358-9ac0-018e53d6ce12/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 01:35:55,088 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0dd9036d-146f-4358-9ac0-018e53d6ce12/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2022-11-22 01:35:55,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:35:55,247 INFO L263 TraceCheckSpWp]: Trace formula consists of 351 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-22 01:35:55,248 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:35:55,383 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 9 proven. 5 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-22 01:35:55,384 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 01:35:55,520 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 9 proven. 5 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-22 01:35:55,520 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [825084808] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 01:35:55,520 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [622171381] [2022-11-22 01:35:55,522 INFO L159 IcfgInterpreter]: Started Sifa with 36 locations of interest [2022-11-22 01:35:55,522 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 01:35:55,522 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 01:35:55,522 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 01:35:55,522 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 01:35:55,792 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 [2022-11-22 01:35:55,800 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-11-22 01:35:55,831 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 6 [2022-11-22 01:35:55,919 INFO L321 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2022-11-22 01:35:55,919 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 [2022-11-22 01:35:55,958 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-22 01:35:55,958 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 [2022-11-22 01:35:56,051 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 [2022-11-22 01:35:56,062 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-22 01:35:56,146 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 [2022-11-22 01:35:56,157 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-22 01:35:56,212 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 [2022-11-22 01:35:56,365 INFO L321 Elim1Store]: treesize reduction 84, result has 9.7 percent of original size [2022-11-22 01:35:56,365 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 [2022-11-22 01:35:56,444 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:35:56,460 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-22 01:35:56,461 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 [2022-11-22 01:35:56,487 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:35:56,504 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-22 01:35:56,504 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 [2022-11-22 01:35:56,788 INFO L321 Elim1Store]: treesize reduction 76, result has 31.5 percent of original size [2022-11-22 01:35:56,789 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 [2022-11-22 01:35:56,952 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-22 01:35:56,980 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:35:56,983 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:35:57,020 INFO L321 Elim1Store]: treesize reduction 28, result has 60.6 percent of original size [2022-11-22 01:35:57,020 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 [2022-11-22 01:35:57,062 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-22 01:35:57,097 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:35:57,099 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:35:57,102 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:35:57,141 INFO L321 Elim1Store]: treesize reduction 28, result has 60.6 percent of original size [2022-11-22 01:35:57,142 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 [2022-11-22 01:35:57,262 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:35:57,262 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 [2022-11-22 01:35:57,333 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:35:57,334 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 [2022-11-22 01:35:57,439 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 01:35:57,535 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:35:57,537 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:35:57,579 INFO L321 Elim1Store]: treesize reduction 25, result has 59.7 percent of original size [2022-11-22 01:35:57,580 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 [2022-11-22 01:35:57,628 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:35:57,630 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:35:57,639 INFO L321 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2022-11-22 01:35:57,639 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 [2022-11-22 01:35:57,794 INFO L321 Elim1Store]: treesize reduction 22, result has 59.3 percent of original size [2022-11-22 01:35:57,794 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 33 treesize of output 45 [2022-11-22 01:35:57,872 INFO L321 Elim1Store]: treesize reduction 27, result has 61.4 percent of original size [2022-11-22 01:35:57,872 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 [2022-11-22 01:35:58,001 INFO L321 Elim1Store]: treesize reduction 22, result has 59.3 percent of original size [2022-11-22 01:35:58,002 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 [2022-11-22 01:35:58,087 INFO L321 Elim1Store]: treesize reduction 27, result has 61.4 percent of original size [2022-11-22 01:35:58,087 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 [2022-11-22 01:35:58,222 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:35:58,222 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 [2022-11-22 01:35:58,259 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:35:58,259 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 29 [2022-11-22 01:35:58,394 INFO L321 Elim1Store]: treesize reduction 43, result has 20.4 percent of original size [2022-11-22 01:35:58,394 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 [2022-11-22 01:35:58,488 INFO L321 Elim1Store]: treesize reduction 56, result has 20.0 percent of original size [2022-11-22 01:35:58,488 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 [2022-11-22 01:35:58,684 INFO L321 Elim1Store]: treesize reduction 22, result has 59.3 percent of original size [2022-11-22 01:35:58,684 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 [2022-11-22 01:35:58,769 INFO L321 Elim1Store]: treesize reduction 27, result has 61.4 percent of original size [2022-11-22 01:35:58,769 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 [2022-11-22 01:35:58,893 INFO L321 Elim1Store]: treesize reduction 22, result has 59.3 percent of original size [2022-11-22 01:35:58,893 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 [2022-11-22 01:35:58,992 INFO L321 Elim1Store]: treesize reduction 27, result has 61.4 percent of original size [2022-11-22 01:35:58,992 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 [2022-11-22 01:35:59,341 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:35:59,341 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 [2022-11-22 01:35:59,381 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:35:59,382 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 [2022-11-22 01:35:59,522 INFO L321 Elim1Store]: treesize reduction 43, result has 20.4 percent of original size [2022-11-22 01:35:59,522 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 [2022-11-22 01:35:59,599 INFO L321 Elim1Store]: treesize reduction 56, result has 20.0 percent of original size [2022-11-22 01:35:59,599 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 [2022-11-22 01:35:59,794 INFO L321 Elim1Store]: treesize reduction 22, result has 59.3 percent of original size [2022-11-22 01:35:59,795 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 45 [2022-11-22 01:35:59,868 INFO L321 Elim1Store]: treesize reduction 27, result has 61.4 percent of original size [2022-11-22 01:35:59,869 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 [2022-11-22 01:36:00,013 INFO L321 Elim1Store]: treesize reduction 22, result has 59.3 percent of original size [2022-11-22 01:36:00,013 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 [2022-11-22 01:36:00,103 INFO L321 Elim1Store]: treesize reduction 27, result has 61.4 percent of original size [2022-11-22 01:36:00,103 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 [2022-11-22 01:36:00,695 INFO L197 IcfgInterpreter]: Interpreting procedure #Ultimate.meminit with input of size 70 for LOIs [2022-11-22 01:36:00,719 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 8 for LOIs [2022-11-22 01:36:00,720 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 01:36:14,520 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 [2022-11-22 01:36:14,521 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-22 01:36:14,521 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-22 01:36:14,521 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 15 [2022-11-22 01:36:14,521 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [774748663] [2022-11-22 01:36:14,521 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-22 01:36:14,521 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-11-22 01:36:14,521 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:36:14,521 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-11-22 01:36:14,522 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=243, Invalid=2207, Unknown=0, NotChecked=0, Total=2450 [2022-11-22 01:36:14,522 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) [2022-11-22 01:36:14,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:36:14,799 INFO L93 Difference]: Finished difference Result 170 states and 193 transitions. [2022-11-22 01:36:14,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-22 01:36:14,800 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 [2022-11-22 01:36:14,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:36:14,801 INFO L225 Difference]: With dead ends: 170 [2022-11-22 01:36:14,801 INFO L226 Difference]: Without dead ends: 170 [2022-11-22 01:36:14,801 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 120 SyntacticMatches, 6 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 832 ImplicationChecksByTransitivity, 14.0s TimeCoverageRelationStatistics Valid=276, Invalid=2586, Unknown=0, NotChecked=0, Total=2862 [2022-11-22 01:36:14,802 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 67 mSDsluCounter, 235 mSDsCounter, 0 mSdLazyCounter, 242 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 269 SdHoareTripleChecker+Invalid, 248 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 242 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-22 01:36:14,802 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [67 Valid, 269 Invalid, 248 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 242 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-22 01:36:14,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2022-11-22 01:36:14,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 167. [2022-11-22 01:36:14,805 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) [2022-11-22 01:36:14,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 191 transitions. [2022-11-22 01:36:14,806 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 191 transitions. Word has length 55 [2022-11-22 01:36:14,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:36:14,806 INFO L495 AbstractCegarLoop]: Abstraction has 167 states and 191 transitions. [2022-11-22 01:36:14,806 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) [2022-11-22 01:36:14,806 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 191 transitions. [2022-11-22 01:36:14,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-11-22 01:36:14,807 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:36:14,807 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] [2022-11-22 01:36:14,827 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0dd9036d-146f-4358-9ac0-018e53d6ce12/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2022-11-22 01:36:15,015 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49,36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0dd9036d-146f-4358-9ac0-018e53d6ce12/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:36:15,015 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)] === [2022-11-22 01:36:15,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:36:15,016 INFO L85 PathProgramCache]: Analyzing trace with hash 616278162, now seen corresponding path program 5 times [2022-11-22 01:36:15,016 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:36:15,016 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [25486502] [2022-11-22 01:36:15,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:36:15,016 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:36:15,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:36:15,186 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 6 proven. 20 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2022-11-22 01:36:15,186 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:36:15,186 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [25486502] [2022-11-22 01:36:15,186 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [25486502] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 01:36:15,187 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1369722489] [2022-11-22 01:36:15,187 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-22 01:36:15,187 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:36:15,187 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0dd9036d-146f-4358-9ac0-018e53d6ce12/bin/utaipan-g80aRyZoba/z3 [2022-11-22 01:36:15,188 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0dd9036d-146f-4358-9ac0-018e53d6ce12/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 01:36:15,199 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0dd9036d-146f-4358-9ac0-018e53d6ce12/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2022-11-22 01:36:15,615 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-22 01:36:15,615 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-22 01:36:15,617 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 32 conjunts are in the unsatisfiable core [2022-11-22 01:36:15,619 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:36:15,788 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-22 01:36:16,412 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 [2022-11-22 01:36:16,709 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 19 proven. 11 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2022-11-22 01:36:16,710 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 01:36:17,353 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 7 proven. 21 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2022-11-22 01:36:17,354 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1369722489] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 01:36:17,354 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [871101047] [2022-11-22 01:36:17,355 INFO L159 IcfgInterpreter]: Started Sifa with 23 locations of interest [2022-11-22 01:36:17,355 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 01:36:17,356 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 01:36:17,356 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 01:36:17,356 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 01:36:17,531 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-11-22 01:36:17,556 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 [2022-11-22 01:36:17,591 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 6 [2022-11-22 01:36:17,682 INFO L321 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2022-11-22 01:36:17,683 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 [2022-11-22 01:36:17,715 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-22 01:36:17,715 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 [2022-11-22 01:36:17,815 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 [2022-11-22 01:36:17,826 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-22 01:36:17,904 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 [2022-11-22 01:36:17,915 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-22 01:36:18,007 INFO L321 Elim1Store]: treesize reduction 28, result has 15.2 percent of original size [2022-11-22 01:36:18,008 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 [2022-11-22 01:36:18,068 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:36:18,082 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-22 01:36:18,082 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 [2022-11-22 01:36:18,112 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:36:18,130 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-22 01:36:18,130 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 [2022-11-22 01:36:18,236 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:36:18,236 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 34 treesize of output 26 [2022-11-22 01:36:18,317 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:36:18,318 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 [2022-11-22 01:36:18,399 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:36:18,400 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 [2022-11-22 01:36:18,564 INFO L197 IcfgInterpreter]: Interpreting procedure #Ultimate.meminit with input of size 70 for LOIs [2022-11-22 01:36:18,591 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 8 for LOIs [2022-11-22 01:36:18,592 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 01:36:26,839 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 [2022-11-22 01:36:26,839 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-22 01:36:26,839 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-22 01:36:26,839 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 15, 14] total 33 [2022-11-22 01:36:26,839 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [464273966] [2022-11-22 01:36:26,839 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-22 01:36:26,840 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-11-22 01:36:26,840 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:36:26,840 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-11-22 01:36:26,840 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=239, Invalid=2729, Unknown=2, NotChecked=0, Total=2970 [2022-11-22 01:36:26,841 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) [2022-11-22 01:36:29,232 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.48s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-22 01:36:30,701 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.46s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-22 01:36:32,966 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-22 01:36:35,010 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-22 01:36:37,853 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-22 01:36:39,976 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-22 01:36:42,076 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-22 01:36:45,396 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-22 01:36:47,407 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-22 01:36:49,501 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-22 01:36:51,511 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-22 01:36:53,869 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-22 01:36:55,899 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-22 01:36:57,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:36:57,904 INFO L93 Difference]: Finished difference Result 613 states and 687 transitions. [2022-11-22 01:36:57,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-11-22 01:36:57,905 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 [2022-11-22 01:36:57,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:36:57,908 INFO L225 Difference]: With dead ends: 613 [2022-11-22 01:36:57,908 INFO L226 Difference]: Without dead ends: 613 [2022-11-22 01:36:57,910 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 218 GetRequests, 120 SyntacticMatches, 2 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2854 ImplicationChecksByTransitivity, 12.8s TimeCoverageRelationStatistics Valid=1026, Invalid=8478, Unknown=2, NotChecked=0, Total=9506 [2022-11-22 01:36:57,911 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 1505 mSDsluCounter, 538 mSDsCounter, 0 mSdLazyCounter, 1655 mSolverCounterSat, 72 mSolverCounterUnsat, 13 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 27.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1507 SdHoareTripleChecker+Valid, 579 SdHoareTripleChecker+Invalid, 1740 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 1655 IncrementalHoareTripleChecker+Invalid, 13 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 27.5s IncrementalHoareTripleChecker+Time [2022-11-22 01:36:57,911 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1507 Valid, 579 Invalid, 1740 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 1655 Invalid, 13 Unknown, 0 Unchecked, 27.5s Time] [2022-11-22 01:36:57,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 613 states. [2022-11-22 01:36:57,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 613 to 229. [2022-11-22 01:36:57,917 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) [2022-11-22 01:36:57,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 268 transitions. [2022-11-22 01:36:57,918 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 268 transitions. Word has length 56 [2022-11-22 01:36:57,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:36:57,919 INFO L495 AbstractCegarLoop]: Abstraction has 229 states and 268 transitions. [2022-11-22 01:36:57,919 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) [2022-11-22 01:36:57,919 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 268 transitions. [2022-11-22 01:36:57,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-11-22 01:36:57,920 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:36:57,920 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] [2022-11-22 01:36:57,931 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0dd9036d-146f-4358-9ac0-018e53d6ce12/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2022-11-22 01:36:58,127 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0dd9036d-146f-4358-9ac0-018e53d6ce12/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:36:58,127 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)] === [2022-11-22 01:36:58,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:36:58,127 INFO L85 PathProgramCache]: Analyzing trace with hash -830956881, now seen corresponding path program 1 times [2022-11-22 01:36:58,128 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:36:58,128 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1160919409] [2022-11-22 01:36:58,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:36:58,128 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:36:58,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:36:58,210 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-11-22 01:36:58,211 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:36:58,211 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1160919409] [2022-11-22 01:36:58,211 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1160919409] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 01:36:58,211 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 01:36:58,211 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-22 01:36:58,212 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1985021655] [2022-11-22 01:36:58,212 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:36:58,212 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-22 01:36:58,212 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:36:58,216 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-22 01:36:58,216 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-22 01:36:58,216 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) [2022-11-22 01:36:58,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:36:58,291 INFO L93 Difference]: Finished difference Result 228 states and 267 transitions. [2022-11-22 01:36:58,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-22 01:36:58,292 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 [2022-11-22 01:36:58,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:36:58,294 INFO L225 Difference]: With dead ends: 228 [2022-11-22 01:36:58,294 INFO L226 Difference]: Without dead ends: 198 [2022-11-22 01:36:58,295 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-22 01:36:58,295 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 [2022-11-22 01:36:58,295 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] [2022-11-22 01:36:58,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2022-11-22 01:36:58,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 198. [2022-11-22 01:36:58,307 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) [2022-11-22 01:36:58,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 233 transitions. [2022-11-22 01:36:58,308 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 233 transitions. Word has length 56 [2022-11-22 01:36:58,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:36:58,309 INFO L495 AbstractCegarLoop]: Abstraction has 198 states and 233 transitions. [2022-11-22 01:36:58,309 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) [2022-11-22 01:36:58,309 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 233 transitions. [2022-11-22 01:36:58,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-11-22 01:36:58,310 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:36:58,310 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] [2022-11-22 01:36:58,310 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2022-11-22 01:36:58,310 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)] === [2022-11-22 01:36:58,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:36:58,311 INFO L85 PathProgramCache]: Analyzing trace with hash -320252555, now seen corresponding path program 6 times [2022-11-22 01:36:58,311 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:36:58,311 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [329533629] [2022-11-22 01:36:58,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:36:58,312 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:36:58,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:36:58,638 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 43 proven. 36 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-22 01:36:58,638 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:36:58,638 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [329533629] [2022-11-22 01:36:58,638 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [329533629] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 01:36:58,638 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1797829334] [2022-11-22 01:36:58,638 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-22 01:36:58,638 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:36:58,638 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0dd9036d-146f-4358-9ac0-018e53d6ce12/bin/utaipan-g80aRyZoba/z3 [2022-11-22 01:36:58,639 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0dd9036d-146f-4358-9ac0-018e53d6ce12/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 01:36:58,642 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0dd9036d-146f-4358-9ac0-018e53d6ce12/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2022-11-22 01:36:58,790 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-22 01:36:58,791 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-22 01:36:58,792 INFO L263 TraceCheckSpWp]: Trace formula consists of 271 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-22 01:36:58,794 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:36:58,988 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 56 proven. 22 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-22 01:36:58,988 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 01:36:59,219 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 56 proven. 22 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-22 01:36:59,219 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1797829334] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 01:36:59,219 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1621304721] [2022-11-22 01:36:59,220 INFO L159 IcfgInterpreter]: Started Sifa with 23 locations of interest [2022-11-22 01:36:59,220 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 01:36:59,221 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 01:36:59,221 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 01:36:59,221 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 01:36:59,555 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 [2022-11-22 01:36:59,569 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-11-22 01:36:59,603 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2022-11-22 01:36:59,695 INFO L321 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2022-11-22 01:36:59,695 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 [2022-11-22 01:36:59,728 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-22 01:36:59,728 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 [2022-11-22 01:36:59,861 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 [2022-11-22 01:36:59,875 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-22 01:36:59,956 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 [2022-11-22 01:36:59,968 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-22 01:37:00,066 INFO L321 Elim1Store]: treesize reduction 28, result has 15.2 percent of original size [2022-11-22 01:37:00,067 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 [2022-11-22 01:37:00,129 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:37:00,144 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-22 01:37:00,144 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-22 01:37:00,172 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:37:00,187 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-22 01:37:00,187 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 [2022-11-22 01:37:00,269 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:37:00,269 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 [2022-11-22 01:37:00,372 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:37:00,373 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 [2022-11-22 01:37:00,452 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:37:00,453 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 [2022-11-22 01:37:00,638 INFO L197 IcfgInterpreter]: Interpreting procedure #Ultimate.meminit with input of size 70 for LOIs [2022-11-22 01:37:00,667 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 8 for LOIs [2022-11-22 01:37:00,669 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 01:37:05,782 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 [2022-11-22 01:37:05,782 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-22 01:37:05,783 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-22 01:37:05,783 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 25 [2022-11-22 01:37:05,783 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1936378609] [2022-11-22 01:37:05,783 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-22 01:37:05,783 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-11-22 01:37:05,783 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:37:05,784 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-11-22 01:37:05,784 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=1926, Unknown=0, NotChecked=0, Total=2162 [2022-11-22 01:37:05,784 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) [2022-11-22 01:37:06,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:37:06,599 INFO L93 Difference]: Finished difference Result 235 states and 272 transitions. [2022-11-22 01:37:06,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-22 01:37:06,600 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 [2022-11-22 01:37:06,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:37:06,601 INFO L225 Difference]: With dead ends: 235 [2022-11-22 01:37:06,601 INFO L226 Difference]: Without dead ends: 235 [2022-11-22 01:37:06,602 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 137 SyntacticMatches, 5 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 893 ImplicationChecksByTransitivity, 5.7s TimeCoverageRelationStatistics Valid=416, Invalid=2776, Unknown=0, NotChecked=0, Total=3192 [2022-11-22 01:37:06,602 INFO L413 NwaCegarLoop]: 45 mSDtfsCounter, 288 mSDsluCounter, 481 mSDsCounter, 0 mSdLazyCounter, 670 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 288 SdHoareTripleChecker+Valid, 526 SdHoareTripleChecker+Invalid, 679 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 670 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-22 01:37:06,602 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [288 Valid, 526 Invalid, 679 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 670 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-22 01:37:06,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235 states. [2022-11-22 01:37:06,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 235 to 198. [2022-11-22 01:37:06,606 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) [2022-11-22 01:37:06,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 231 transitions. [2022-11-22 01:37:06,607 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 231 transitions. Word has length 58 [2022-11-22 01:37:06,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:37:06,607 INFO L495 AbstractCegarLoop]: Abstraction has 198 states and 231 transitions. [2022-11-22 01:37:06,607 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) [2022-11-22 01:37:06,608 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 231 transitions. [2022-11-22 01:37:06,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-11-22 01:37:06,608 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:37:06,609 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] [2022-11-22 01:37:06,632 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0dd9036d-146f-4358-9ac0-018e53d6ce12/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2022-11-22 01:37:06,831 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0dd9036d-146f-4358-9ac0-018e53d6ce12/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable52 [2022-11-22 01:37:06,831 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)] === [2022-11-22 01:37:06,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:37:06,832 INFO L85 PathProgramCache]: Analyzing trace with hash -1905928531, now seen corresponding path program 3 times [2022-11-22 01:37:06,832 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:37:06,832 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1925383692] [2022-11-22 01:37:06,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:37:06,832 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:37:06,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:37:07,246 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 6 proven. 19 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-11-22 01:37:07,246 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:37:07,246 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1925383692] [2022-11-22 01:37:07,247 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1925383692] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 01:37:07,247 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1328437555] [2022-11-22 01:37:07,247 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-22 01:37:07,247 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:37:07,247 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0dd9036d-146f-4358-9ac0-018e53d6ce12/bin/utaipan-g80aRyZoba/z3 [2022-11-22 01:37:07,248 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0dd9036d-146f-4358-9ac0-018e53d6ce12/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 01:37:07,250 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0dd9036d-146f-4358-9ac0-018e53d6ce12/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2022-11-22 01:37:07,402 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-22 01:37:07,402 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-22 01:37:07,403 INFO L263 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-22 01:37:07,404 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:37:07,590 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2022-11-22 01:37:07,590 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 01:37:07,953 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2022-11-22 01:37:07,953 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1328437555] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 01:37:07,953 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [983463611] [2022-11-22 01:37:07,955 INFO L159 IcfgInterpreter]: Started Sifa with 31 locations of interest [2022-11-22 01:37:07,955 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 01:37:07,955 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 01:37:07,955 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 01:37:07,955 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 01:37:08,235 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 [2022-11-22 01:37:08,241 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-11-22 01:37:08,282 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 6 [2022-11-22 01:37:08,383 INFO L321 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2022-11-22 01:37:08,383 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 [2022-11-22 01:37:08,414 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-22 01:37:08,414 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 [2022-11-22 01:37:08,515 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 [2022-11-22 01:37:08,527 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-22 01:37:08,638 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 [2022-11-22 01:37:08,650 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-22 01:37:08,704 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 [2022-11-22 01:37:08,820 INFO L321 Elim1Store]: treesize reduction 84, result has 9.7 percent of original size [2022-11-22 01:37:08,821 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 [2022-11-22 01:37:08,898 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:37:08,914 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-22 01:37:08,914 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-22 01:37:08,941 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:37:08,957 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-22 01:37:08,957 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 [2022-11-22 01:37:09,240 INFO L321 Elim1Store]: treesize reduction 76, result has 31.5 percent of original size [2022-11-22 01:37:09,241 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 [2022-11-22 01:37:09,575 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:37:09,578 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:37:09,619 INFO L321 Elim1Store]: treesize reduction 28, result has 60.6 percent of original size [2022-11-22 01:37:09,620 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 [2022-11-22 01:37:09,755 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:37:09,758 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:37:09,809 INFO L321 Elim1Store]: treesize reduction 28, result has 60.6 percent of original size [2022-11-22 01:37:09,809 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 [2022-11-22 01:37:09,960 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:37:09,961 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:37:09,965 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:37:10,011 INFO L321 Elim1Store]: treesize reduction 28, result has 60.6 percent of original size [2022-11-22 01:37:10,011 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 [2022-11-22 01:37:10,079 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:37:10,081 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:37:10,084 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:37:10,140 INFO L321 Elim1Store]: treesize reduction 28, result has 60.6 percent of original size [2022-11-22 01:37:10,140 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 [2022-11-22 01:37:10,386 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:37:10,387 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 [2022-11-22 01:37:10,482 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:37:10,482 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 [2022-11-22 01:37:10,582 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 01:37:10,726 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:37:10,728 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:37:10,782 INFO L321 Elim1Store]: treesize reduction 25, result has 59.7 percent of original size [2022-11-22 01:37:10,782 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 [2022-11-22 01:37:10,847 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:37:10,849 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:37:10,859 INFO L321 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2022-11-22 01:37:10,860 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 [2022-11-22 01:37:11,051 INFO L321 Elim1Store]: treesize reduction 22, result has 59.3 percent of original size [2022-11-22 01:37:11,051 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 [2022-11-22 01:37:11,146 INFO L321 Elim1Store]: treesize reduction 27, result has 61.4 percent of original size [2022-11-22 01:37:11,147 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 [2022-11-22 01:37:11,295 INFO L321 Elim1Store]: treesize reduction 22, result has 59.3 percent of original size [2022-11-22 01:37:11,296 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 [2022-11-22 01:37:11,396 INFO L321 Elim1Store]: treesize reduction 27, result has 61.4 percent of original size [2022-11-22 01:37:11,397 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 [2022-11-22 01:37:11,657 INFO L197 IcfgInterpreter]: Interpreting procedure #Ultimate.meminit with input of size 70 for LOIs [2022-11-22 01:37:11,683 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 8 for LOIs [2022-11-22 01:37:11,684 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 01:37:20,095 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 [2022-11-22 01:37:20,095 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-22 01:37:20,095 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-22 01:37:20,095 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 6, 6] total 23 [2022-11-22 01:37:20,095 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1888582343] [2022-11-22 01:37:20,096 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-22 01:37:20,096 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-11-22 01:37:20,096 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:37:20,096 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-11-22 01:37:20,097 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=222, Invalid=2430, Unknown=0, NotChecked=0, Total=2652 [2022-11-22 01:37:20,097 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) [2022-11-22 01:37:21,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:37:21,403 INFO L93 Difference]: Finished difference Result 224 states and 261 transitions. [2022-11-22 01:37:21,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-22 01:37:21,404 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 [2022-11-22 01:37:21,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:37:21,405 INFO L225 Difference]: With dead ends: 224 [2022-11-22 01:37:21,405 INFO L226 Difference]: Without dead ends: 224 [2022-11-22 01:37:21,406 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 204 GetRequests, 140 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 976 ImplicationChecksByTransitivity, 9.5s TimeCoverageRelationStatistics Valid=453, Invalid=3837, Unknown=0, NotChecked=0, Total=4290 [2022-11-22 01:37:21,406 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 319 mSDsluCounter, 217 mSDsCounter, 0 mSdLazyCounter, 628 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 319 SdHoareTripleChecker+Valid, 237 SdHoareTripleChecker+Invalid, 647 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 628 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-22 01:37:21,406 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [319 Valid, 237 Invalid, 647 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 628 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-22 01:37:21,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2022-11-22 01:37:21,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 199. [2022-11-22 01:37:21,410 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) [2022-11-22 01:37:21,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 233 transitions. [2022-11-22 01:37:21,411 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 233 transitions. Word has length 59 [2022-11-22 01:37:21,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:37:21,412 INFO L495 AbstractCegarLoop]: Abstraction has 199 states and 233 transitions. [2022-11-22 01:37:21,412 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) [2022-11-22 01:37:21,412 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 233 transitions. [2022-11-22 01:37:21,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-11-22 01:37:21,413 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:37:21,413 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] [2022-11-22 01:37:21,423 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0dd9036d-146f-4358-9ac0-018e53d6ce12/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2022-11-22 01:37:21,619 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0dd9036d-146f-4358-9ac0-018e53d6ce12/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable53 [2022-11-22 01:37:21,619 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)] === [2022-11-22 01:37:21,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:37:21,619 INFO L85 PathProgramCache]: Analyzing trace with hash -2017565660, now seen corresponding path program 7 times [2022-11-22 01:37:21,619 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:37:21,620 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1642289679] [2022-11-22 01:37:21,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:37:21,620 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:37:21,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:37:22,082 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2022-11-22 01:37:22,082 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:37:22,082 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1642289679] [2022-11-22 01:37:22,082 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1642289679] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 01:37:22,082 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [161635717] [2022-11-22 01:37:22,083 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-22 01:37:22,083 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:37:22,083 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0dd9036d-146f-4358-9ac0-018e53d6ce12/bin/utaipan-g80aRyZoba/z3 [2022-11-22 01:37:22,084 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0dd9036d-146f-4358-9ac0-018e53d6ce12/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 01:37:22,111 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0dd9036d-146f-4358-9ac0-018e53d6ce12/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2022-11-22 01:37:22,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:37:22,354 INFO L263 TraceCheckSpWp]: Trace formula consists of 370 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-22 01:37:22,356 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:37:23,214 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2022-11-22 01:37:23,214 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 01:37:23,815 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 4 proven. 52 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2022-11-22 01:37:23,816 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [161635717] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 01:37:23,816 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [890007820] [2022-11-22 01:37:23,817 INFO L159 IcfgInterpreter]: Started Sifa with 23 locations of interest [2022-11-22 01:37:23,817 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 01:37:23,817 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 01:37:23,817 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 01:37:23,817 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 01:37:24,095 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 [2022-11-22 01:37:24,103 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-11-22 01:37:24,149 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2022-11-22 01:37:24,245 INFO L321 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2022-11-22 01:37:24,245 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 [2022-11-22 01:37:24,278 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-22 01:37:24,278 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 [2022-11-22 01:37:24,379 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 [2022-11-22 01:37:24,391 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-22 01:37:24,503 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 [2022-11-22 01:37:24,514 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-22 01:37:24,610 INFO L321 Elim1Store]: treesize reduction 38, result has 11.6 percent of original size [2022-11-22 01:37:24,610 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 [2022-11-22 01:37:24,701 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:37:24,714 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-22 01:37:24,715 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 [2022-11-22 01:37:24,750 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:37:24,764 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-22 01:37:24,764 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 [2022-11-22 01:37:24,796 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:37:24,810 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-22 01:37:24,811 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 [2022-11-22 01:37:24,896 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:37:24,897 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 [2022-11-22 01:37:24,993 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:37:24,993 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 [2022-11-22 01:37:25,087 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:37:25,088 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 [2022-11-22 01:37:25,264 INFO L197 IcfgInterpreter]: Interpreting procedure #Ultimate.meminit with input of size 70 for LOIs [2022-11-22 01:37:25,292 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 8 for LOIs [2022-11-22 01:37:25,293 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 01:37:30,930 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 [2022-11-22 01:37:30,930 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-22 01:37:30,930 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-22 01:37:30,930 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 33 [2022-11-22 01:37:30,930 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1981927080] [2022-11-22 01:37:30,931 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-22 01:37:30,935 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-11-22 01:37:30,936 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:37:30,936 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-11-22 01:37:30,936 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=297, Invalid=2673, Unknown=0, NotChecked=0, Total=2970 [2022-11-22 01:37:30,937 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) [2022-11-22 01:37:37,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:37:37,200 INFO L93 Difference]: Finished difference Result 423 states and 486 transitions. [2022-11-22 01:37:37,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2022-11-22 01:37:37,200 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 [2022-11-22 01:37:37,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:37:37,203 INFO L225 Difference]: With dead ends: 423 [2022-11-22 01:37:37,203 INFO L226 Difference]: Without dead ends: 423 [2022-11-22 01:37:37,203 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 244 GetRequests, 143 SyntacticMatches, 1 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3008 ImplicationChecksByTransitivity, 11.3s TimeCoverageRelationStatistics Valid=1109, Invalid=9193, Unknown=0, NotChecked=0, Total=10302 [2022-11-22 01:37:37,204 INFO L413 NwaCegarLoop]: 55 mSDtfsCounter, 766 mSDsluCounter, 320 mSDsCounter, 0 mSdLazyCounter, 1365 mSolverCounterSat, 70 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 766 SdHoareTripleChecker+Valid, 375 SdHoareTripleChecker+Invalid, 1435 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 1365 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-11-22 01:37:37,204 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [766 Valid, 375 Invalid, 1435 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [70 Valid, 1365 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-11-22 01:37:37,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 423 states. [2022-11-22 01:37:37,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 423 to 249. [2022-11-22 01:37:37,209 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) [2022-11-22 01:37:37,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 249 states to 249 states and 288 transitions. [2022-11-22 01:37:37,210 INFO L78 Accepts]: Start accepts. Automaton has 249 states and 288 transitions. Word has length 62 [2022-11-22 01:37:37,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:37:37,210 INFO L495 AbstractCegarLoop]: Abstraction has 249 states and 288 transitions. [2022-11-22 01:37:37,210 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) [2022-11-22 01:37:37,211 INFO L276 IsEmpty]: Start isEmpty. Operand 249 states and 288 transitions. [2022-11-22 01:37:37,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-11-22 01:37:37,211 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:37:37,212 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] [2022-11-22 01:37:37,223 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0dd9036d-146f-4358-9ac0-018e53d6ce12/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2022-11-22 01:37:37,418 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54,40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0dd9036d-146f-4358-9ac0-018e53d6ce12/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:37:37,418 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)] === [2022-11-22 01:37:37,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:37:37,419 INFO L85 PathProgramCache]: Analyzing trace with hash -799920217, now seen corresponding path program 8 times [2022-11-22 01:37:37,419 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:37:37,419 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [536609001] [2022-11-22 01:37:37,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:37:37,419 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:37:37,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:37:37,763 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 38 proven. 49 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-11-22 01:37:37,764 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:37:37,764 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [536609001] [2022-11-22 01:37:37,764 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [536609001] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 01:37:37,764 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [684036048] [2022-11-22 01:37:37,764 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-22 01:37:37,764 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:37:37,765 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0dd9036d-146f-4358-9ac0-018e53d6ce12/bin/utaipan-g80aRyZoba/z3 [2022-11-22 01:37:37,765 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0dd9036d-146f-4358-9ac0-018e53d6ce12/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 01:37:37,767 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0dd9036d-146f-4358-9ac0-018e53d6ce12/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2022-11-22 01:37:38,093 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-22 01:37:38,093 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-22 01:37:38,095 INFO L263 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 53 conjunts are in the unsatisfiable core [2022-11-22 01:37:38,098 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:37:38,459 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-22 01:37:43,152 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 8 proven. 21 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2022-11-22 01:37:43,152 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 01:37:44,849 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 85 treesize of output 81 [2022-11-22 01:37:45,529 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 1 proven. 36 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2022-11-22 01:37:45,529 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [684036048] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 01:37:45,529 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [800242942] [2022-11-22 01:37:45,530 INFO L159 IcfgInterpreter]: Started Sifa with 23 locations of interest [2022-11-22 01:37:45,531 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 01:37:45,531 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 01:37:45,531 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 01:37:45,531 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 01:37:45,853 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-11-22 01:37:45,858 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 [2022-11-22 01:37:45,909 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 6 [2022-11-22 01:37:46,004 INFO L321 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2022-11-22 01:37:46,004 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 1 case distinctions, treesize of input 127 treesize of output 127 [2022-11-22 01:37:46,036 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-22 01:37:46,036 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 [2022-11-22 01:37:46,137 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 [2022-11-22 01:37:46,149 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-22 01:37:46,244 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 [2022-11-22 01:37:46,255 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-22 01:37:46,385 INFO L321 Elim1Store]: treesize reduction 38, result has 11.6 percent of original size [2022-11-22 01:37:46,385 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 [2022-11-22 01:37:46,462 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:37:46,476 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-22 01:37:46,477 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 [2022-11-22 01:37:46,514 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:37:46,529 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-22 01:37:46,529 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 [2022-11-22 01:37:46,558 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:37:46,572 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-22 01:37:46,573 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 [2022-11-22 01:37:46,672 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:37:46,672 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 [2022-11-22 01:37:46,766 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:37:46,766 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 [2022-11-22 01:37:46,846 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:37:46,846 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 [2022-11-22 01:37:47,021 INFO L197 IcfgInterpreter]: Interpreting procedure #Ultimate.meminit with input of size 70 for LOIs [2022-11-22 01:37:47,052 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 8 for LOIs [2022-11-22 01:37:47,053 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 01:37:54,867 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 [2022-11-22 01:37:54,867 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-22 01:37:54,867 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-22 01:37:54,867 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 16, 16] total 42 [2022-11-22 01:37:54,867 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [341561615] [2022-11-22 01:37:54,868 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-22 01:37:54,868 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-11-22 01:37:54,868 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:37:54,869 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-11-22 01:37:54,869 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=289, Invalid=3743, Unknown=0, NotChecked=0, Total=4032 [2022-11-22 01:37:54,869 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) [2022-11-22 01:38:00,631 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-22 01:38:03,745 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-22 01:38:08,388 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-22 01:38:11,867 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-22 01:38:15,279 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-22 01:38:18,065 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-22 01:38:20,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:38:20,656 INFO L93 Difference]: Finished difference Result 286 states and 326 transitions. [2022-11-22 01:38:20,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-11-22 01:38:20,657 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 [2022-11-22 01:38:20,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:38:20,659 INFO L225 Difference]: With dead ends: 286 [2022-11-22 01:38:20,659 INFO L226 Difference]: Without dead ends: 263 [2022-11-22 01:38:20,660 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 244 GetRequests, 135 SyntacticMatches, 2 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3343 ImplicationChecksByTransitivity, 19.3s TimeCoverageRelationStatistics Valid=1065, Invalid=10707, Unknown=0, NotChecked=0, Total=11772 [2022-11-22 01:38:20,660 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 338 mSDsluCounter, 426 mSDsCounter, 0 mSdLazyCounter, 1963 mSolverCounterSat, 39 mSolverCounterUnsat, 6 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 18.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 341 SdHoareTripleChecker+Valid, 455 SdHoareTripleChecker+Invalid, 2008 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 1963 IncrementalHoareTripleChecker+Invalid, 6 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 18.4s IncrementalHoareTripleChecker+Time [2022-11-22 01:38:20,660 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [341 Valid, 455 Invalid, 2008 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 1963 Invalid, 6 Unknown, 0 Unchecked, 18.4s Time] [2022-11-22 01:38:20,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 263 states. [2022-11-22 01:38:20,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 263 to 219. [2022-11-22 01:38:20,664 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) [2022-11-22 01:38:20,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219 states to 219 states and 248 transitions. [2022-11-22 01:38:20,665 INFO L78 Accepts]: Start accepts. Automaton has 219 states and 248 transitions. Word has length 62 [2022-11-22 01:38:20,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:38:20,666 INFO L495 AbstractCegarLoop]: Abstraction has 219 states and 248 transitions. [2022-11-22 01:38:20,666 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) [2022-11-22 01:38:20,666 INFO L276 IsEmpty]: Start isEmpty. Operand 219 states and 248 transitions. [2022-11-22 01:38:20,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-11-22 01:38:20,667 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:38:20,667 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] [2022-11-22 01:38:20,673 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0dd9036d-146f-4358-9ac0-018e53d6ce12/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2022-11-22 01:38:20,878 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55,41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0dd9036d-146f-4358-9ac0-018e53d6ce12/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:38:20,878 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)] === [2022-11-22 01:38:20,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:38:20,878 INFO L85 PathProgramCache]: Analyzing trace with hash 251843626, now seen corresponding path program 2 times [2022-11-22 01:38:20,879 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:38:20,879 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [465597965] [2022-11-22 01:38:20,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:38:20,879 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:38:20,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:38:21,226 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-11-22 01:38:21,226 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:38:21,226 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [465597965] [2022-11-22 01:38:21,226 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [465597965] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 01:38:21,226 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1274381291] [2022-11-22 01:38:21,226 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-22 01:38:21,227 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:38:21,227 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0dd9036d-146f-4358-9ac0-018e53d6ce12/bin/utaipan-g80aRyZoba/z3 [2022-11-22 01:38:21,227 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0dd9036d-146f-4358-9ac0-018e53d6ce12/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 01:38:21,230 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0dd9036d-146f-4358-9ac0-018e53d6ce12/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2022-11-22 01:38:21,460 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-22 01:38:21,461 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-22 01:38:21,463 INFO L263 TraceCheckSpWp]: Trace formula consists of 326 conjuncts, 74 conjunts are in the unsatisfiable core [2022-11-22 01:38:21,472 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:38:21,695 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2022-11-22 01:38:21,892 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-22 01:38:21,892 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 [2022-11-22 01:38:22,028 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2022-11-22 01:38:22,514 INFO L321 Elim1Store]: treesize reduction 11, result has 21.4 percent of original size [2022-11-22 01:38:22,514 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 [2022-11-22 01:38:22,550 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2022-11-22 01:38:22,550 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 01:38:22,841 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 [2022-11-22 01:38:23,239 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 [2022-11-22 01:38:23,245 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 [2022-11-22 01:38:23,835 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2022-11-22 01:38:23,835 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1274381291] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 01:38:23,835 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1874436973] [2022-11-22 01:38:23,836 INFO L159 IcfgInterpreter]: Started Sifa with 35 locations of interest [2022-11-22 01:38:23,837 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 01:38:23,837 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 01:38:23,837 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 01:38:23,837 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 01:38:24,023 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 [2022-11-22 01:38:24,036 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-11-22 01:38:24,070 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 6 [2022-11-22 01:38:24,159 INFO L321 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2022-11-22 01:38:24,160 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 [2022-11-22 01:38:24,192 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-22 01:38:24,193 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 [2022-11-22 01:38:24,279 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 [2022-11-22 01:38:24,290 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-22 01:38:24,371 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 [2022-11-22 01:38:24,382 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-22 01:38:24,432 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 [2022-11-22 01:38:24,548 INFO L321 Elim1Store]: treesize reduction 84, result has 9.7 percent of original size [2022-11-22 01:38:24,548 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 [2022-11-22 01:38:24,626 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:38:24,641 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-22 01:38:24,641 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 [2022-11-22 01:38:24,669 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:38:24,684 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-22 01:38:24,684 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-22 01:38:24,920 INFO L321 Elim1Store]: treesize reduction 72, result has 32.7 percent of original size [2022-11-22 01:38:24,920 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 [2022-11-22 01:38:25,081 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-22 01:38:25,105 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:38:25,108 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:38:25,147 INFO L321 Elim1Store]: treesize reduction 28, result has 60.6 percent of original size [2022-11-22 01:38:25,147 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 [2022-11-22 01:38:25,209 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-22 01:38:25,238 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:38:25,239 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:38:25,242 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:38:25,289 INFO L321 Elim1Store]: treesize reduction 28, result has 60.6 percent of original size [2022-11-22 01:38:25,289 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 [2022-11-22 01:38:25,418 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:38:25,419 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 [2022-11-22 01:38:25,503 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:38:25,504 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 [2022-11-22 01:38:25,593 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2022-11-22 01:38:25,701 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:38:25,702 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:38:25,745 INFO L321 Elim1Store]: treesize reduction 25, result has 59.7 percent of original size [2022-11-22 01:38:25,745 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 [2022-11-22 01:38:25,811 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:38:25,812 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:38:25,822 INFO L321 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2022-11-22 01:38:25,822 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 65 treesize of output 59 [2022-11-22 01:38:25,986 INFO L321 Elim1Store]: treesize reduction 22, result has 59.3 percent of original size [2022-11-22 01:38:25,986 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 [2022-11-22 01:38:26,071 INFO L321 Elim1Store]: treesize reduction 27, result has 61.4 percent of original size [2022-11-22 01:38:26,071 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 [2022-11-22 01:38:26,205 INFO L321 Elim1Store]: treesize reduction 22, result has 59.3 percent of original size [2022-11-22 01:38:26,206 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 33 treesize of output 45 [2022-11-22 01:38:26,284 INFO L321 Elim1Store]: treesize reduction 27, result has 61.4 percent of original size [2022-11-22 01:38:26,284 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 [2022-11-22 01:38:26,418 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:38:26,419 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 [2022-11-22 01:38:26,461 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:38:26,462 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 [2022-11-22 01:38:26,595 INFO L321 Elim1Store]: treesize reduction 43, result has 20.4 percent of original size [2022-11-22 01:38:26,596 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 172 treesize of output 147 [2022-11-22 01:38:26,682 INFO L321 Elim1Store]: treesize reduction 56, result has 20.0 percent of original size [2022-11-22 01:38:26,683 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 [2022-11-22 01:38:26,880 INFO L321 Elim1Store]: treesize reduction 22, result has 59.3 percent of original size [2022-11-22 01:38:26,880 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 [2022-11-22 01:38:26,954 INFO L321 Elim1Store]: treesize reduction 27, result has 61.4 percent of original size [2022-11-22 01:38:26,955 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 69 treesize of output 77 [2022-11-22 01:38:27,084 INFO L321 Elim1Store]: treesize reduction 22, result has 59.3 percent of original size [2022-11-22 01:38:27,084 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 33 treesize of output 45 [2022-11-22 01:38:27,167 INFO L321 Elim1Store]: treesize reduction 27, result has 61.4 percent of original size [2022-11-22 01:38:27,167 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 [2022-11-22 01:38:27,479 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:38:27,480 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 [2022-11-22 01:38:27,519 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:38:27,520 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 [2022-11-22 01:38:27,669 INFO L321 Elim1Store]: treesize reduction 43, result has 20.4 percent of original size [2022-11-22 01:38:27,670 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 [2022-11-22 01:38:27,749 INFO L321 Elim1Store]: treesize reduction 56, result has 20.0 percent of original size [2022-11-22 01:38:27,750 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 [2022-11-22 01:38:27,942 INFO L321 Elim1Store]: treesize reduction 22, result has 59.3 percent of original size [2022-11-22 01:38:27,943 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 [2022-11-22 01:38:28,017 INFO L321 Elim1Store]: treesize reduction 27, result has 61.4 percent of original size [2022-11-22 01:38:28,018 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 [2022-11-22 01:38:28,152 INFO L321 Elim1Store]: treesize reduction 22, result has 59.3 percent of original size [2022-11-22 01:38:28,152 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 [2022-11-22 01:38:28,235 INFO L321 Elim1Store]: treesize reduction 27, result has 61.4 percent of original size [2022-11-22 01:38:28,235 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 [2022-11-22 01:38:28,501 INFO L197 IcfgInterpreter]: Interpreting procedure #Ultimate.meminit with input of size 70 for LOIs [2022-11-22 01:38:28,529 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 8 for LOIs [2022-11-22 01:38:28,530 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 01:38:41,661 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 [2022-11-22 01:38:41,661 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-22 01:38:41,661 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-22 01:38:41,661 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 15, 15] total 38 [2022-11-22 01:38:41,661 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1516876343] [2022-11-22 01:38:41,661 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-22 01:38:41,662 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-11-22 01:38:41,662 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:38:41,662 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-11-22 01:38:41,663 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=347, Invalid=4623, Unknown=0, NotChecked=0, Total=4970 [2022-11-22 01:38:41,663 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) [2022-11-22 01:38:43,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:38:43,850 INFO L93 Difference]: Finished difference Result 227 states and 256 transitions. [2022-11-22 01:38:43,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-22 01:38:43,851 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 [2022-11-22 01:38:43,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:38:43,852 INFO L225 Difference]: With dead ends: 227 [2022-11-22 01:38:43,853 INFO L226 Difference]: Without dead ends: 227 [2022-11-22 01:38:43,853 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 134 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2126 ImplicationChecksByTransitivity, 15.7s TimeCoverageRelationStatistics Valid=672, Invalid=6468, Unknown=0, NotChecked=0, Total=7140 [2022-11-22 01:38:43,854 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 355 mSDsluCounter, 322 mSDsCounter, 0 mSdLazyCounter, 967 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 355 SdHoareTripleChecker+Valid, 347 SdHoareTripleChecker+Invalid, 990 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 967 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-22 01:38:43,854 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [355 Valid, 347 Invalid, 990 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 967 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-11-22 01:38:43,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2022-11-22 01:38:43,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 219. [2022-11-22 01:38:43,858 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) [2022-11-22 01:38:43,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219 states to 219 states and 248 transitions. [2022-11-22 01:38:43,859 INFO L78 Accepts]: Start accepts. Automaton has 219 states and 248 transitions. Word has length 64 [2022-11-22 01:38:43,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:38:43,859 INFO L495 AbstractCegarLoop]: Abstraction has 219 states and 248 transitions. [2022-11-22 01:38:43,860 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) [2022-11-22 01:38:43,860 INFO L276 IsEmpty]: Start isEmpty. Operand 219 states and 248 transitions. [2022-11-22 01:38:43,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-11-22 01:38:43,860 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:38:43,861 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] [2022-11-22 01:38:43,875 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0dd9036d-146f-4358-9ac0-018e53d6ce12/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2022-11-22 01:38:44,071 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0dd9036d-146f-4358-9ac0-018e53d6ce12/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2022-11-22 01:38:44,072 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)] === [2022-11-22 01:38:44,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:38:44,072 INFO L85 PathProgramCache]: Analyzing trace with hash -783206004, now seen corresponding path program 3 times [2022-11-22 01:38:44,072 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:38:44,072 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [184356153] [2022-11-22 01:38:44,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:38:44,072 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:38:44,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:38:44,372 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 5 proven. 24 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-11-22 01:38:44,372 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:38:44,372 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [184356153] [2022-11-22 01:38:44,372 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [184356153] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 01:38:44,373 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1495597329] [2022-11-22 01:38:44,373 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-22 01:38:44,373 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:38:44,373 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0dd9036d-146f-4358-9ac0-018e53d6ce12/bin/utaipan-g80aRyZoba/z3 [2022-11-22 01:38:44,374 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0dd9036d-146f-4358-9ac0-018e53d6ce12/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 01:38:44,376 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0dd9036d-146f-4358-9ac0-018e53d6ce12/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2022-11-22 01:38:44,648 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-22 01:38:44,648 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-22 01:38:44,651 INFO L263 TraceCheckSpWp]: Trace formula consists of 422 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-22 01:38:44,653 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:38:44,947 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 16 proven. 25 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-22 01:38:44,947 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 01:38:45,320 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 16 proven. 25 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-22 01:38:45,320 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1495597329] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 01:38:45,321 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [467064551] [2022-11-22 01:38:45,322 INFO L159 IcfgInterpreter]: Started Sifa with 35 locations of interest [2022-11-22 01:38:45,322 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 01:38:45,322 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 01:38:45,322 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 01:38:45,322 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 01:38:45,630 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-11-22 01:38:45,645 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 [2022-11-22 01:38:45,685 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2022-11-22 01:38:45,789 INFO L321 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2022-11-22 01:38:45,789 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 [2022-11-22 01:38:45,822 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-22 01:38:45,823 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 [2022-11-22 01:38:45,916 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 [2022-11-22 01:38:45,928 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-22 01:38:46,016 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 [2022-11-22 01:38:46,028 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-22 01:38:46,078 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 [2022-11-22 01:38:46,180 INFO L321 Elim1Store]: treesize reduction 84, result has 9.7 percent of original size [2022-11-22 01:38:46,180 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 [2022-11-22 01:38:46,273 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:38:46,302 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-22 01:38:46,302 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 [2022-11-22 01:38:46,328 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:38:46,342 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-22 01:38:46,343 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 [2022-11-22 01:38:46,786 INFO L321 Elim1Store]: treesize reduction 72, result has 32.7 percent of original size [2022-11-22 01:38:46,787 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 [2022-11-22 01:38:47,116 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:38:47,119 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:38:47,157 INFO L321 Elim1Store]: treesize reduction 28, result has 60.6 percent of original size [2022-11-22 01:38:47,158 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 [2022-11-22 01:38:47,300 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:38:47,303 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:38:47,357 INFO L321 Elim1Store]: treesize reduction 28, result has 60.6 percent of original size [2022-11-22 01:38:47,358 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 [2022-11-22 01:38:47,532 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:38:47,533 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:38:47,537 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:38:47,585 INFO L321 Elim1Store]: treesize reduction 28, result has 60.6 percent of original size [2022-11-22 01:38:47,586 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 [2022-11-22 01:38:47,666 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:38:47,669 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:38:47,674 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:38:47,744 INFO L321 Elim1Store]: treesize reduction 28, result has 60.6 percent of original size [2022-11-22 01:38:47,744 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 [2022-11-22 01:38:47,929 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:38:47,930 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 [2022-11-22 01:38:48,025 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:38:48,026 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 [2022-11-22 01:38:48,111 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2022-11-22 01:38:48,217 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:38:48,219 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:38:48,261 INFO L321 Elim1Store]: treesize reduction 25, result has 59.7 percent of original size [2022-11-22 01:38:48,262 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 [2022-11-22 01:38:48,329 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:38:48,331 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:38:48,340 INFO L321 Elim1Store]: treesize reduction 17, result has 5.6 percent of original size [2022-11-22 01:38:48,341 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 [2022-11-22 01:38:48,487 INFO L321 Elim1Store]: treesize reduction 22, result has 59.3 percent of original size [2022-11-22 01:38:48,488 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 [2022-11-22 01:38:48,561 INFO L321 Elim1Store]: treesize reduction 27, result has 61.4 percent of original size [2022-11-22 01:38:48,561 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 [2022-11-22 01:38:48,705 INFO L321 Elim1Store]: treesize reduction 22, result has 59.3 percent of original size [2022-11-22 01:38:48,705 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 [2022-11-22 01:38:48,788 INFO L321 Elim1Store]: treesize reduction 27, result has 61.4 percent of original size [2022-11-22 01:38:48,788 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 [2022-11-22 01:38:48,937 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:38:48,937 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 [2022-11-22 01:38:48,990 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:38:48,991 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 [2022-11-22 01:38:49,216 INFO L321 Elim1Store]: treesize reduction 43, result has 20.4 percent of original size [2022-11-22 01:38:49,216 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 [2022-11-22 01:38:49,315 INFO L321 Elim1Store]: treesize reduction 56, result has 20.0 percent of original size [2022-11-22 01:38:49,316 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 [2022-11-22 01:38:49,517 INFO L321 Elim1Store]: treesize reduction 22, result has 59.3 percent of original size [2022-11-22 01:38:49,517 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 [2022-11-22 01:38:49,594 INFO L321 Elim1Store]: treesize reduction 27, result has 61.4 percent of original size [2022-11-22 01:38:49,594 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 [2022-11-22 01:38:49,721 INFO L321 Elim1Store]: treesize reduction 22, result has 59.3 percent of original size [2022-11-22 01:38:49,721 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 [2022-11-22 01:38:49,804 INFO L321 Elim1Store]: treesize reduction 27, result has 61.4 percent of original size [2022-11-22 01:38:49,805 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 [2022-11-22 01:38:50,173 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:38:50,174 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 [2022-11-22 01:38:50,205 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:38:50,206 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 40 treesize of output 31 [2022-11-22 01:38:50,350 INFO L321 Elim1Store]: treesize reduction 43, result has 20.4 percent of original size [2022-11-22 01:38:50,351 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 [2022-11-22 01:38:50,436 INFO L321 Elim1Store]: treesize reduction 56, result has 20.0 percent of original size [2022-11-22 01:38:50,437 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 [2022-11-22 01:38:50,660 INFO L321 Elim1Store]: treesize reduction 22, result has 59.3 percent of original size [2022-11-22 01:38:50,660 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 [2022-11-22 01:38:50,747 INFO L321 Elim1Store]: treesize reduction 27, result has 61.4 percent of original size [2022-11-22 01:38:50,747 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 69 treesize of output 77 [2022-11-22 01:38:50,928 INFO L321 Elim1Store]: treesize reduction 22, result has 59.3 percent of original size [2022-11-22 01:38:50,929 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 45 [2022-11-22 01:38:51,009 INFO L321 Elim1Store]: treesize reduction 27, result has 61.4 percent of original size [2022-11-22 01:38:51,009 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 [2022-11-22 01:38:51,354 INFO L197 IcfgInterpreter]: Interpreting procedure #Ultimate.meminit with input of size 70 for LOIs [2022-11-22 01:38:51,384 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 8 for LOIs [2022-11-22 01:38:51,386 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 01:39:03,469 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 [2022-11-22 01:39:03,469 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-22 01:39:03,470 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-22 01:39:03,470 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13, 13] total 25 [2022-11-22 01:39:03,470 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1445246664] [2022-11-22 01:39:03,470 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-22 01:39:03,470 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-11-22 01:39:03,470 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:39:03,471 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-11-22 01:39:03,471 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=295, Invalid=3011, Unknown=0, NotChecked=0, Total=3306 [2022-11-22 01:39:03,471 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)