./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/verifythis/duplets.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 8393723b Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18e0f2b5-4226-4767-8bd2-110427c66437/bin/utaipan-I9t0OCRTmS/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18e0f2b5-4226-4767-8bd2-110427c66437/bin/utaipan-I9t0OCRTmS/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18e0f2b5-4226-4767-8bd2-110427c66437/bin/utaipan-I9t0OCRTmS/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18e0f2b5-4226-4767-8bd2-110427c66437/bin/utaipan-I9t0OCRTmS/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/verifythis/duplets.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18e0f2b5-4226-4767-8bd2-110427c66437/bin/utaipan-I9t0OCRTmS/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18e0f2b5-4226-4767-8bd2-110427c66437/bin/utaipan-I9t0OCRTmS --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash ac76721ba91522692e2c3e4d1ea27df0200031dd012c5066cc7280e0ae6e2244 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-8393723 [2022-11-19 06:57:12,893 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-19 06:57:12,895 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-19 06:57:12,914 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-19 06:57:12,915 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-19 06:57:12,916 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-19 06:57:12,918 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-19 06:57:12,920 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-19 06:57:12,922 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-19 06:57:12,923 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-19 06:57:12,924 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-19 06:57:12,926 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-19 06:57:12,926 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-19 06:57:12,927 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-19 06:57:12,929 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-19 06:57:12,930 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-19 06:57:12,931 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-19 06:57:12,932 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-19 06:57:12,934 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-19 06:57:12,936 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-19 06:57:12,941 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-19 06:57:12,947 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-19 06:57:12,949 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-19 06:57:12,951 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-19 06:57:12,957 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-19 06:57:12,965 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-19 06:57:12,966 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-19 06:57:12,967 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-19 06:57:12,968 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-19 06:57:12,969 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-19 06:57:12,969 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-19 06:57:12,970 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-19 06:57:12,973 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-19 06:57:12,975 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-19 06:57:12,977 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-19 06:57:12,977 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-19 06:57:12,979 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-19 06:57:12,979 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-19 06:57:12,980 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-19 06:57:12,981 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-19 06:57:12,982 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-19 06:57:12,983 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18e0f2b5-4226-4767-8bd2-110427c66437/bin/utaipan-I9t0OCRTmS/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2022-11-19 06:57:13,007 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-19 06:57:13,008 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-19 06:57:13,008 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-19 06:57:13,008 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-19 06:57:13,009 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-19 06:57:13,009 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-19 06:57:13,009 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-19 06:57:13,009 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-19 06:57:13,010 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-19 06:57:13,010 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-19 06:57:13,010 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-19 06:57:13,010 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-19 06:57:13,010 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-19 06:57:13,010 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-19 06:57:13,011 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-19 06:57:13,011 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-19 06:57:13,011 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-19 06:57:13,011 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-19 06:57:13,012 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-19 06:57:13,012 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-19 06:57:13,012 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-19 06:57:13,013 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-19 06:57:13,013 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-19 06:57:13,013 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-19 06:57:13,013 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-19 06:57:13,013 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-19 06:57:13,013 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-11-19 06:57:13,014 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-11-19 06:57:13,014 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-11-19 06:57:13,014 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-19 06:57:13,014 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-19 06:57:13,014 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-19 06:57:13,014 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-19 06:57:13,015 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-19 06:57:13,015 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-19 06:57:13,015 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-19 06:57:13,015 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-19 06:57:13,016 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-19 06:57:13,016 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-19 06:57:13,016 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-19 06:57:13,016 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-19 06:57:13,016 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-19 06:57:13,016 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_18e0f2b5-4226-4767-8bd2-110427c66437/bin/utaipan-I9t0OCRTmS/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18e0f2b5-4226-4767-8bd2-110427c66437/bin/utaipan-I9t0OCRTmS Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ac76721ba91522692e2c3e4d1ea27df0200031dd012c5066cc7280e0ae6e2244 [2022-11-19 06:57:13,320 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-19 06:57:13,344 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-19 06:57:13,347 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-19 06:57:13,348 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-19 06:57:13,349 INFO L275 PluginConnector]: CDTParser initialized [2022-11-19 06:57:13,351 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18e0f2b5-4226-4767-8bd2-110427c66437/bin/utaipan-I9t0OCRTmS/../../sv-benchmarks/c/verifythis/duplets.c [2022-11-19 06:57:13,434 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18e0f2b5-4226-4767-8bd2-110427c66437/bin/utaipan-I9t0OCRTmS/data/5d58aedfc/d77ec08542864b829e942aa6c4f8cc3a/FLAG76523230f [2022-11-19 06:57:14,035 INFO L306 CDTParser]: Found 1 translation units. [2022-11-19 06:57:14,035 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18e0f2b5-4226-4767-8bd2-110427c66437/sv-benchmarks/c/verifythis/duplets.c [2022-11-19 06:57:14,044 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18e0f2b5-4226-4767-8bd2-110427c66437/bin/utaipan-I9t0OCRTmS/data/5d58aedfc/d77ec08542864b829e942aa6c4f8cc3a/FLAG76523230f [2022-11-19 06:57:14,381 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18e0f2b5-4226-4767-8bd2-110427c66437/bin/utaipan-I9t0OCRTmS/data/5d58aedfc/d77ec08542864b829e942aa6c4f8cc3a [2022-11-19 06:57:14,385 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-19 06:57:14,390 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-19 06:57:14,394 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-19 06:57:14,394 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-19 06:57:14,399 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-19 06:57:14,400 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 06:57:14" (1/1) ... [2022-11-19 06:57:14,402 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@42de9a34 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:57:14, skipping insertion in model container [2022-11-19 06:57:14,403 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 06:57:14" (1/1) ... [2022-11-19 06:57:14,412 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-19 06:57:14,429 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-19 06:57:14,631 WARN L234 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18e0f2b5-4226-4767-8bd2-110427c66437/sv-benchmarks/c/verifythis/duplets.c[485,498] [2022-11-19 06:57:14,657 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-19 06:57:14,668 INFO L203 MainTranslator]: Completed pre-run [2022-11-19 06:57:14,681 WARN L234 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18e0f2b5-4226-4767-8bd2-110427c66437/sv-benchmarks/c/verifythis/duplets.c[485,498] [2022-11-19 06:57:14,693 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-19 06:57:14,709 INFO L208 MainTranslator]: Completed translation [2022-11-19 06:57:14,709 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:57:14 WrapperNode [2022-11-19 06:57:14,709 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-19 06:57:14,710 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-19 06:57:14,711 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-19 06:57:14,711 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-19 06:57:14,718 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:57:14" (1/1) ... [2022-11-19 06:57:14,727 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:57:14" (1/1) ... [2022-11-19 06:57:14,752 INFO L138 Inliner]: procedures = 21, calls = 43, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 123 [2022-11-19 06:57:14,752 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-19 06:57:14,753 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-19 06:57:14,753 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-19 06:57:14,754 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-19 06:57:14,763 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:57:14" (1/1) ... [2022-11-19 06:57:14,763 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:57:14" (1/1) ... [2022-11-19 06:57:14,766 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:57:14" (1/1) ... [2022-11-19 06:57:14,767 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:57:14" (1/1) ... [2022-11-19 06:57:14,775 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:57:14" (1/1) ... [2022-11-19 06:57:14,779 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:57:14" (1/1) ... [2022-11-19 06:57:14,781 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:57:14" (1/1) ... [2022-11-19 06:57:14,783 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:57:14" (1/1) ... [2022-11-19 06:57:14,785 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-19 06:57:14,786 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-19 06:57:14,787 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-19 06:57:14,787 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-19 06:57:14,791 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:57:14" (1/1) ... [2022-11-19 06:57:14,806 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-19 06:57:14,823 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18e0f2b5-4226-4767-8bd2-110427c66437/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 06:57:14,836 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18e0f2b5-4226-4767-8bd2-110427c66437/bin/utaipan-I9t0OCRTmS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-19 06:57:14,860 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18e0f2b5-4226-4767-8bd2-110427c66437/bin/utaipan-I9t0OCRTmS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-19 06:57:14,878 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-19 06:57:14,878 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-11-19 06:57:14,878 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-11-19 06:57:14,878 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-19 06:57:14,879 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-19 06:57:14,879 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-19 06:57:14,879 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-19 06:57:14,879 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-19 06:57:14,879 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-19 06:57:14,879 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-19 06:57:14,879 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-11-19 06:57:14,880 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-11-19 06:57:14,880 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-19 06:57:14,992 INFO L235 CfgBuilder]: Building ICFG [2022-11-19 06:57:14,995 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-19 06:57:15,569 INFO L276 CfgBuilder]: Performing block encoding [2022-11-19 06:57:15,621 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-19 06:57:15,621 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2022-11-19 06:57:15,624 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 06:57:15 BoogieIcfgContainer [2022-11-19 06:57:15,624 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-19 06:57:15,626 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-19 06:57:15,627 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-19 06:57:15,631 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-19 06:57:15,631 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 06:57:14" (1/3) ... [2022-11-19 06:57:15,632 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5ebd99a7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 06:57:15, skipping insertion in model container [2022-11-19 06:57:15,633 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:57:14" (2/3) ... [2022-11-19 06:57:15,633 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5ebd99a7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 06:57:15, skipping insertion in model container [2022-11-19 06:57:15,633 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 06:57:15" (3/3) ... [2022-11-19 06:57:15,635 INFO L112 eAbstractionObserver]: Analyzing ICFG duplets.c [2022-11-19 06:57:15,658 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-19 06:57:15,659 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 37 error locations. [2022-11-19 06:57:15,758 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-19 06:57:15,766 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;@4cc26a0e, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-19 06:57:15,766 INFO L358 AbstractCegarLoop]: Starting to check reachability of 37 error locations. [2022-11-19 06:57:15,771 INFO L276 IsEmpty]: Start isEmpty. Operand has 87 states, 38 states have (on average 2.1315789473684212) internal successors, (81), 75 states have internal predecessors, (81), 9 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-11-19 06:57:15,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-11-19 06:57:15,780 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:57:15,781 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 06:57:15,782 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2022-11-19 06:57:15,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:57:15,792 INFO L85 PathProgramCache]: Analyzing trace with hash 1311551543, now seen corresponding path program 1 times [2022-11-19 06:57:15,804 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 06:57:15,805 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [658114450] [2022-11-19 06:57:15,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:57:15,806 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 06:57:15,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:57:16,178 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-19 06:57:16,179 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 06:57:16,179 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [658114450] [2022-11-19 06:57:16,180 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [658114450] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 06:57:16,181 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 06:57:16,181 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-19 06:57:16,182 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [812755901] [2022-11-19 06:57:16,183 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 06:57:16,188 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 06:57:16,188 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 06:57:16,215 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 06:57:16,216 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 06:57:16,219 INFO L87 Difference]: Start difference. First operand has 87 states, 38 states have (on average 2.1315789473684212) internal successors, (81), 75 states have internal predecessors, (81), 9 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) Second operand has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 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) [2022-11-19 06:57:16,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:57:16,339 INFO L93 Difference]: Finished difference Result 85 states and 96 transitions. [2022-11-19 06:57:16,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 06:57:16,342 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 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 16 [2022-11-19 06:57:16,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:57:16,351 INFO L225 Difference]: With dead ends: 85 [2022-11-19 06:57:16,351 INFO L226 Difference]: Without dead ends: 84 [2022-11-19 06:57:16,353 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 [2022-11-19 06:57:16,356 INFO L413 NwaCegarLoop]: 55 mSDtfsCounter, 65 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 06:57:16,357 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [70 Valid, 62 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 06:57:16,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2022-11-19 06:57:16,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 84. [2022-11-19 06:57:16,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 38 states have (on average 2.026315789473684) internal successors, (77), 72 states have internal predecessors, (77), 9 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-11-19 06:57:16,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 95 transitions. [2022-11-19 06:57:16,403 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 95 transitions. Word has length 16 [2022-11-19 06:57:16,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:57:16,404 INFO L495 AbstractCegarLoop]: Abstraction has 84 states and 95 transitions. [2022-11-19 06:57:16,405 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 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) [2022-11-19 06:57:16,405 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 95 transitions. [2022-11-19 06:57:16,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-11-19 06:57:16,406 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:57:16,406 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 06:57:16,407 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-19 06:57:16,407 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2022-11-19 06:57:16,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:57:16,408 INFO L85 PathProgramCache]: Analyzing trace with hash 1311551544, now seen corresponding path program 1 times [2022-11-19 06:57:16,408 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 06:57:16,409 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1734855918] [2022-11-19 06:57:16,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:57:16,409 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 06:57:16,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:57:16,980 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-19 06:57:16,980 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 06:57:16,983 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1734855918] [2022-11-19 06:57:16,985 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1734855918] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 06:57:16,986 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1659111957] [2022-11-19 06:57:16,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:57:16,987 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 06:57:16,987 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18e0f2b5-4226-4767-8bd2-110427c66437/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 06:57:16,994 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18e0f2b5-4226-4767-8bd2-110427c66437/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 06:57:17,014 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18e0f2b5-4226-4767-8bd2-110427c66437/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-19 06:57:17,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:57:17,116 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 29 conjunts are in the unsatisfiable core [2022-11-19 06:57:17,126 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 06:57:17,359 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-19 06:57:17,766 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-19 06:57:17,766 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 06:57:18,136 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-19 06:57:18,139 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1659111957] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 06:57:18,139 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1975757384] [2022-11-19 06:57:18,158 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2022-11-19 06:57:18,158 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 06:57:18,162 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 06:57:18,168 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 06:57:18,168 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 06:57:18,319 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:57:18,321 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 22 treesize of output 22 [2022-11-19 06:57:18,352 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:57:18,354 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:57:18,355 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:57:18,358 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 34 [2022-11-19 06:57:18,439 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:57:18,441 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:57:18,466 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-19 06:57:18,467 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-19 06:57:18,597 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:57:18,598 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:57:18,628 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-19 06:57:18,629 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-19 06:57:18,824 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:57:18,825 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:57:18,848 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-19 06:57:18,849 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-19 06:57:18,952 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:57:18,954 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:57:18,975 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-19 06:57:18,975 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-19 06:57:19,205 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:57:19,207 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:57:19,230 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-19 06:57:19,230 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-19 06:57:19,360 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:57:19,362 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:57:19,388 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-19 06:57:19,389 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-19 06:57:19,672 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:57:19,674 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:57:19,698 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-19 06:57:19,698 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-19 06:57:19,792 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:57:19,794 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:57:19,834 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-19 06:57:19,834 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-19 06:57:19,964 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:57:19,966 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:57:19,995 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-19 06:57:19,996 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-19 06:57:20,047 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 59 for LOIs [2022-11-19 06:57:20,072 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 06:57:22,640 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [1975757384] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 06:57:22,641 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-11-19 06:57:22,641 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [5, 8, 5] total 22 [2022-11-19 06:57:22,642 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [528203153] [2022-11-19 06:57:22,642 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 06:57:22,643 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-19 06:57:22,643 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 06:57:22,644 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-19 06:57:22,644 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=373, Unknown=0, NotChecked=0, Total=506 [2022-11-19 06:57:22,645 INFO L87 Difference]: Start difference. First operand 84 states and 95 transitions. Second operand has 11 states, 5 states have (on average 1.0) internal successors, (5), 5 states have internal predecessors, (5), 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) [2022-11-19 06:57:23,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:57:23,248 INFO L93 Difference]: Finished difference Result 83 states and 94 transitions. [2022-11-19 06:57:23,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-19 06:57:23,249 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 5 states have (on average 1.0) internal successors, (5), 5 states have internal predecessors, (5), 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 16 [2022-11-19 06:57:23,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:57:23,250 INFO L225 Difference]: With dead ends: 83 [2022-11-19 06:57:23,251 INFO L226 Difference]: Without dead ends: 83 [2022-11-19 06:57:23,251 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 26 SyntacticMatches, 5 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=133, Invalid=373, Unknown=0, NotChecked=0, Total=506 [2022-11-19 06:57:23,252 INFO L413 NwaCegarLoop]: 75 mSDtfsCounter, 87 mSDsluCounter, 118 mSDsCounter, 0 mSdLazyCounter, 273 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 193 SdHoareTripleChecker+Invalid, 276 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 273 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-19 06:57:23,253 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [91 Valid, 193 Invalid, 276 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 273 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-19 06:57:23,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2022-11-19 06:57:23,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 83. [2022-11-19 06:57:23,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 38 states have (on average 2.0) internal successors, (76), 71 states have internal predecessors, (76), 9 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-11-19 06:57:23,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 94 transitions. [2022-11-19 06:57:23,266 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 94 transitions. Word has length 16 [2022-11-19 06:57:23,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:57:23,267 INFO L495 AbstractCegarLoop]: Abstraction has 83 states and 94 transitions. [2022-11-19 06:57:23,267 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 5 states have (on average 1.0) internal successors, (5), 5 states have internal predecessors, (5), 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) [2022-11-19 06:57:23,267 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 94 transitions. [2022-11-19 06:57:23,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-11-19 06:57:23,268 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:57:23,268 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 06:57:23,279 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18e0f2b5-4226-4767-8bd2-110427c66437/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-11-19 06:57:23,469 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18e0f2b5-4226-4767-8bd2-110427c66437/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 06:57:23,469 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2022-11-19 06:57:23,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:57:23,470 INFO L85 PathProgramCache]: Analyzing trace with hash 2003392154, now seen corresponding path program 1 times [2022-11-19 06:57:23,470 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 06:57:23,471 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [315106975] [2022-11-19 06:57:23,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:57:23,471 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 06:57:23,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:57:23,864 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-19 06:57:23,864 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 06:57:23,866 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [315106975] [2022-11-19 06:57:23,870 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [315106975] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 06:57:23,870 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1827652060] [2022-11-19 06:57:23,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:57:23,871 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 06:57:23,872 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18e0f2b5-4226-4767-8bd2-110427c66437/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 06:57:23,873 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18e0f2b5-4226-4767-8bd2-110427c66437/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 06:57:23,898 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18e0f2b5-4226-4767-8bd2-110427c66437/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-19 06:57:23,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:57:23,952 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 32 conjunts are in the unsatisfiable core [2022-11-19 06:57:23,968 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 06:57:24,016 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 [2022-11-19 06:57:24,741 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-19 06:57:24,742 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 06:57:25,572 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-19 06:57:25,572 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1827652060] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 06:57:25,573 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1787210910] [2022-11-19 06:57:25,575 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2022-11-19 06:57:25,576 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 06:57:25,576 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 06:57:25,577 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 06:57:25,577 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 06:57:25,679 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:57:25,680 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:57:25,682 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:57:25,686 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 34 [2022-11-19 06:57:25,707 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:57:25,708 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 22 treesize of output 22 [2022-11-19 06:57:25,759 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:57:25,762 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:57:25,786 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-19 06:57:25,787 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-19 06:57:25,884 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:57:25,885 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:57:25,915 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-19 06:57:25,916 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-19 06:57:26,138 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:57:26,141 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:57:26,168 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-19 06:57:26,168 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-19 06:57:26,267 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:57:26,272 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:57:26,293 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-19 06:57:26,294 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-19 06:57:26,527 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:57:26,529 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:57:26,556 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-19 06:57:26,556 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-19 06:57:26,672 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:57:26,674 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:57:26,699 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-19 06:57:26,700 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-19 06:57:26,901 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:57:26,903 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:57:26,904 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 36 treesize of output 32 [2022-11-19 06:57:27,018 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:57:27,019 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:57:27,042 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-19 06:57:27,042 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-19 06:57:27,147 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:57:27,148 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:57:27,174 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-19 06:57:27,174 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-19 06:57:27,270 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:57:27,272 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:57:27,296 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-19 06:57:27,296 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-19 06:57:27,344 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 59 for LOIs [2022-11-19 06:57:27,367 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 06:57:30,565 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [1787210910] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 06:57:30,565 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-11-19 06:57:30,565 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [5, 8, 7] total 26 [2022-11-19 06:57:30,566 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [143830041] [2022-11-19 06:57:30,566 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 06:57:30,566 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-19 06:57:30,567 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 06:57:30,567 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-19 06:57:30,568 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=164, Invalid=538, Unknown=0, NotChecked=0, Total=702 [2022-11-19 06:57:30,568 INFO L87 Difference]: Start difference. First operand 83 states and 94 transitions. Second operand has 12 states, 6 states have (on average 1.0) internal successors, (6), 6 states have internal predecessors, (6), 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) [2022-11-19 06:57:31,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:57:31,440 INFO L93 Difference]: Finished difference Result 82 states and 93 transitions. [2022-11-19 06:57:31,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-19 06:57:31,441 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 6 states have (on average 1.0) internal successors, (6), 6 states have internal predecessors, (6), 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 17 [2022-11-19 06:57:31,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:57:31,443 INFO L225 Difference]: With dead ends: 82 [2022-11-19 06:57:31,443 INFO L226 Difference]: Without dead ends: 82 [2022-11-19 06:57:31,443 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 25 SyntacticMatches, 5 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 230 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=164, Invalid=538, Unknown=0, NotChecked=0, Total=702 [2022-11-19 06:57:31,445 INFO L413 NwaCegarLoop]: 74 mSDtfsCounter, 87 mSDsluCounter, 131 mSDsCounter, 0 mSdLazyCounter, 347 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 205 SdHoareTripleChecker+Invalid, 351 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 347 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-19 06:57:31,445 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [91 Valid, 205 Invalid, 351 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 347 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-19 06:57:31,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2022-11-19 06:57:31,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 82. [2022-11-19 06:57:31,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 38 states have (on average 1.9736842105263157) internal successors, (75), 70 states have internal predecessors, (75), 9 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-11-19 06:57:31,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 93 transitions. [2022-11-19 06:57:31,462 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 93 transitions. Word has length 17 [2022-11-19 06:57:31,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:57:31,465 INFO L495 AbstractCegarLoop]: Abstraction has 82 states and 93 transitions. [2022-11-19 06:57:31,466 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 6 states have (on average 1.0) internal successors, (6), 6 states have internal predecessors, (6), 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) [2022-11-19 06:57:31,466 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 93 transitions. [2022-11-19 06:57:31,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-11-19 06:57:31,467 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:57:31,468 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 06:57:31,485 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18e0f2b5-4226-4767-8bd2-110427c66437/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-19 06:57:31,679 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18e0f2b5-4226-4767-8bd2-110427c66437/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 06:57:31,679 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2022-11-19 06:57:31,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:57:31,680 INFO L85 PathProgramCache]: Analyzing trace with hash 194668906, now seen corresponding path program 1 times [2022-11-19 06:57:31,680 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 06:57:31,681 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [233221514] [2022-11-19 06:57:31,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:57:31,681 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 06:57:31,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:57:31,994 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-19 06:57:31,995 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 06:57:31,995 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [233221514] [2022-11-19 06:57:31,995 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [233221514] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 06:57:31,996 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 06:57:31,996 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 06:57:31,996 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1093492355] [2022-11-19 06:57:31,996 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 06:57:31,997 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-19 06:57:31,997 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 06:57:31,997 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-19 06:57:31,998 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-19 06:57:31,998 INFO L87 Difference]: Start difference. First operand 82 states and 93 transitions. Second operand has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 states have internal predecessors, (9), 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) [2022-11-19 06:57:32,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:57:32,144 INFO L93 Difference]: Finished difference Result 77 states and 88 transitions. [2022-11-19 06:57:32,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-19 06:57:32,145 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 states have internal predecessors, (9), 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 20 [2022-11-19 06:57:32,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:57:32,146 INFO L225 Difference]: With dead ends: 77 [2022-11-19 06:57:32,146 INFO L226 Difference]: Without dead ends: 77 [2022-11-19 06:57:32,147 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-19 06:57:32,148 INFO L413 NwaCegarLoop]: 49 mSDtfsCounter, 112 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 112 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 83 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 06:57:32,148 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [112 Valid, 64 Invalid, 83 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 06:57:32,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2022-11-19 06:57:32,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 77. [2022-11-19 06:57:32,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 65 states have internal predecessors, (70), 9 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-11-19 06:57:32,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 88 transitions. [2022-11-19 06:57:32,163 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 88 transitions. Word has length 20 [2022-11-19 06:57:32,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:57:32,164 INFO L495 AbstractCegarLoop]: Abstraction has 77 states and 88 transitions. [2022-11-19 06:57:32,164 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 states have internal predecessors, (9), 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) [2022-11-19 06:57:32,164 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 88 transitions. [2022-11-19 06:57:32,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-11-19 06:57:32,165 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:57:32,166 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 06:57:32,166 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-19 06:57:32,167 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2022-11-19 06:57:32,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:57:32,168 INFO L85 PathProgramCache]: Analyzing trace with hash 194668907, now seen corresponding path program 1 times [2022-11-19 06:57:32,168 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 06:57:32,169 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [921018965] [2022-11-19 06:57:32,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:57:32,169 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 06:57:32,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:57:32,560 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-19 06:57:32,560 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 06:57:32,561 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [921018965] [2022-11-19 06:57:32,561 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [921018965] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 06:57:32,561 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 06:57:32,561 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-19 06:57:32,561 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [551663661] [2022-11-19 06:57:32,561 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 06:57:32,561 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-19 06:57:32,562 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 06:57:32,562 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-19 06:57:32,562 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-19 06:57:32,562 INFO L87 Difference]: Start difference. First operand 77 states and 88 transitions. Second operand has 5 states, 4 states have (on average 2.25) internal successors, (9), 5 states have internal predecessors, (9), 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) [2022-11-19 06:57:32,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:57:32,902 INFO L93 Difference]: Finished difference Result 134 states and 154 transitions. [2022-11-19 06:57:32,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-19 06:57:32,903 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 5 states have internal predecessors, (9), 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 20 [2022-11-19 06:57:32,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:57:32,904 INFO L225 Difference]: With dead ends: 134 [2022-11-19 06:57:32,905 INFO L226 Difference]: Without dead ends: 134 [2022-11-19 06:57:32,905 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-11-19 06:57:32,906 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 170 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 126 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 175 SdHoareTripleChecker+Valid, 93 SdHoareTripleChecker+Invalid, 139 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 126 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-19 06:57:32,906 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [175 Valid, 93 Invalid, 139 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 126 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-19 06:57:32,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2022-11-19 06:57:32,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 81. [2022-11-19 06:57:32,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 43 states have (on average 1.813953488372093) internal successors, (78), 69 states have internal predecessors, (78), 9 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-11-19 06:57:32,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 96 transitions. [2022-11-19 06:57:32,916 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 96 transitions. Word has length 20 [2022-11-19 06:57:32,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:57:32,917 INFO L495 AbstractCegarLoop]: Abstraction has 81 states and 96 transitions. [2022-11-19 06:57:32,917 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 5 states have internal predecessors, (9), 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) [2022-11-19 06:57:32,917 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 96 transitions. [2022-11-19 06:57:32,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-11-19 06:57:32,918 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:57:32,918 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 06:57:32,919 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-19 06:57:32,919 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2022-11-19 06:57:32,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:57:32,919 INFO L85 PathProgramCache]: Analyzing trace with hash 1739768799, now seen corresponding path program 1 times [2022-11-19 06:57:32,920 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 06:57:32,920 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1573268996] [2022-11-19 06:57:32,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:57:32,920 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 06:57:32,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:57:33,802 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-19 06:57:33,802 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 06:57:33,802 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1573268996] [2022-11-19 06:57:33,803 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1573268996] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 06:57:33,803 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 06:57:33,803 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-19 06:57:33,803 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1995902285] [2022-11-19 06:57:33,803 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 06:57:33,803 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-19 06:57:33,804 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 06:57:33,804 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-19 06:57:33,804 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2022-11-19 06:57:33,804 INFO L87 Difference]: Start difference. First operand 81 states and 96 transitions. Second operand has 9 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 9 states have internal predecessors, (11), 2 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-19 06:57:35,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:57:35,542 INFO L93 Difference]: Finished difference Result 237 states and 272 transitions. [2022-11-19 06:57:35,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-19 06:57:35,543 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 9 states have internal predecessors, (11), 2 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 21 [2022-11-19 06:57:35,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:57:35,545 INFO L225 Difference]: With dead ends: 237 [2022-11-19 06:57:35,545 INFO L226 Difference]: Without dead ends: 237 [2022-11-19 06:57:35,545 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=73, Invalid=167, Unknown=0, NotChecked=0, Total=240 [2022-11-19 06:57:35,547 INFO L413 NwaCegarLoop]: 73 mSDtfsCounter, 538 mSDsluCounter, 122 mSDsCounter, 0 mSdLazyCounter, 458 mSolverCounterSat, 89 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 539 SdHoareTripleChecker+Valid, 195 SdHoareTripleChecker+Invalid, 547 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 89 IncrementalHoareTripleChecker+Valid, 458 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-19 06:57:35,547 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [539 Valid, 195 Invalid, 547 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [89 Valid, 458 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-11-19 06:57:35,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2022-11-19 06:57:35,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 84. [2022-11-19 06:57:35,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 46 states have (on average 1.7826086956521738) internal successors, (82), 72 states have internal predecessors, (82), 9 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-11-19 06:57:35,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 100 transitions. [2022-11-19 06:57:35,557 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 100 transitions. Word has length 21 [2022-11-19 06:57:35,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:57:35,558 INFO L495 AbstractCegarLoop]: Abstraction has 84 states and 100 transitions. [2022-11-19 06:57:35,558 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 9 states have internal predecessors, (11), 2 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-19 06:57:35,558 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 100 transitions. [2022-11-19 06:57:35,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-11-19 06:57:35,559 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:57:35,560 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 06:57:35,560 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-19 06:57:35,560 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2022-11-19 06:57:35,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:57:35,561 INFO L85 PathProgramCache]: Analyzing trace with hash 1292239534, now seen corresponding path program 1 times [2022-11-19 06:57:35,561 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 06:57:35,561 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1248782479] [2022-11-19 06:57:35,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:57:35,562 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 06:57:35,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:57:35,713 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-19 06:57:35,713 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 06:57:35,713 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1248782479] [2022-11-19 06:57:35,713 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1248782479] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 06:57:35,714 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1930439601] [2022-11-19 06:57:35,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:57:35,714 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 06:57:35,714 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18e0f2b5-4226-4767-8bd2-110427c66437/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 06:57:35,719 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18e0f2b5-4226-4767-8bd2-110427c66437/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 06:57:35,742 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18e0f2b5-4226-4767-8bd2-110427c66437/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-19 06:57:35,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:57:35,819 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-19 06:57:35,821 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 06:57:35,860 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-19 06:57:35,861 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 06:57:35,988 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-19 06:57:35,988 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1930439601] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 06:57:35,988 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [915144911] [2022-11-19 06:57:35,991 INFO L159 IcfgInterpreter]: Started Sifa with 18 locations of interest [2022-11-19 06:57:35,991 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 06:57:35,992 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 06:57:35,992 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 06:57:35,992 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 06:57:36,062 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:57:36,063 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 22 [2022-11-19 06:57:36,086 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:57:36,088 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:57:36,089 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:57:36,091 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 34 [2022-11-19 06:57:36,135 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:57:36,137 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:57:36,162 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-19 06:57:36,163 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-19 06:57:36,223 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:57:36,225 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:57:36,248 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-19 06:57:36,249 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-19 06:57:36,385 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:57:36,387 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:57:36,414 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-19 06:57:36,415 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-19 06:57:36,504 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:57:36,506 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:57:36,532 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-19 06:57:36,533 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-19 06:57:36,715 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:57:36,717 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:57:36,744 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-19 06:57:36,744 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-19 06:57:36,829 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:57:36,831 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:57:36,855 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-19 06:57:36,856 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-19 06:57:37,026 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:57:37,028 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:57:37,029 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 36 treesize of output 32 [2022-11-19 06:57:37,127 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:57:37,129 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:57:37,130 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:57:37,133 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:57:37,135 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:57:37,137 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:57:37,140 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:57:37,142 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:57:37,144 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:57:37,147 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:57:37,149 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:57:37,152 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:57:37,154 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:57:37,156 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 18 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 63 [2022-11-19 06:57:37,245 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:57:37,247 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:57:37,249 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 43 treesize of output 39 [2022-11-19 06:57:37,401 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:57:37,403 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:57:37,432 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-19 06:57:37,432 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-19 06:57:37,511 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:57:37,513 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:57:37,538 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-19 06:57:37,539 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-19 06:57:37,605 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:57:37,607 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:57:37,629 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-19 06:57:37,630 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-19 06:57:37,669 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 59 for LOIs [2022-11-19 06:57:37,690 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 06:57:41,765 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [915144911] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 06:57:41,765 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-11-19 06:57:41,766 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [6, 6, 6] total 20 [2022-11-19 06:57:41,767 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [505131958] [2022-11-19 06:57:41,767 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 06:57:41,768 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-19 06:57:41,768 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 06:57:41,769 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-19 06:57:41,769 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=293, Unknown=0, NotChecked=0, Total=380 [2022-11-19 06:57:41,770 INFO L87 Difference]: Start difference. First operand 84 states and 100 transitions. Second operand has 13 states, 8 states have (on average 1.375) internal successors, (11), 7 states have internal predecessors, (11), 5 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-19 06:57:43,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:57:43,829 INFO L93 Difference]: Finished difference Result 115 states and 135 transitions. [2022-11-19 06:57:43,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-19 06:57:43,829 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 8 states have (on average 1.375) internal successors, (11), 7 states have internal predecessors, (11), 5 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 23 [2022-11-19 06:57:43,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:57:43,830 INFO L225 Difference]: With dead ends: 115 [2022-11-19 06:57:43,830 INFO L226 Difference]: Without dead ends: 110 [2022-11-19 06:57:43,831 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 54 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=87, Invalid=293, Unknown=0, NotChecked=0, Total=380 [2022-11-19 06:57:43,832 INFO L413 NwaCegarLoop]: 77 mSDtfsCounter, 111 mSDsluCounter, 171 mSDsCounter, 0 mSdLazyCounter, 566 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 120 SdHoareTripleChecker+Valid, 248 SdHoareTripleChecker+Invalid, 595 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 566 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-11-19 06:57:43,832 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [120 Valid, 248 Invalid, 595 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 566 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2022-11-19 06:57:43,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2022-11-19 06:57:43,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 107. [2022-11-19 06:57:43,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 64 states have (on average 1.609375) internal successors, (103), 91 states have internal predecessors, (103), 14 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2022-11-19 06:57:43,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 130 transitions. [2022-11-19 06:57:43,841 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 130 transitions. Word has length 23 [2022-11-19 06:57:43,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:57:43,841 INFO L495 AbstractCegarLoop]: Abstraction has 107 states and 130 transitions. [2022-11-19 06:57:43,841 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 8 states have (on average 1.375) internal successors, (11), 7 states have internal predecessors, (11), 5 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-19 06:57:43,842 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 130 transitions. [2022-11-19 06:57:43,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-11-19 06:57:43,842 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:57:43,843 INFO L195 NwaCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 06:57:43,859 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18e0f2b5-4226-4767-8bd2-110427c66437/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-19 06:57:44,048 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18e0f2b5-4226-4767-8bd2-110427c66437/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 06:57:44,048 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2022-11-19 06:57:44,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:57:44,049 INFO L85 PathProgramCache]: Analyzing trace with hash -1897490764, now seen corresponding path program 1 times [2022-11-19 06:57:44,049 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 06:57:44,049 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1687073533] [2022-11-19 06:57:44,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:57:44,049 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 06:57:44,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:57:44,125 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-19 06:57:44,126 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 06:57:44,126 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1687073533] [2022-11-19 06:57:44,126 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1687073533] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 06:57:44,126 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1347162701] [2022-11-19 06:57:44,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:57:44,127 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 06:57:44,127 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18e0f2b5-4226-4767-8bd2-110427c66437/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 06:57:44,128 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18e0f2b5-4226-4767-8bd2-110427c66437/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 06:57:44,139 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18e0f2b5-4226-4767-8bd2-110427c66437/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-19 06:57:44,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:57:44,231 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-19 06:57:44,233 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 06:57:44,244 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-19 06:57:44,244 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 06:57:44,245 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1347162701] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 06:57:44,245 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-19 06:57:44,245 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 5 [2022-11-19 06:57:44,245 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [222730153] [2022-11-19 06:57:44,245 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 06:57:44,246 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-19 06:57:44,246 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 06:57:44,246 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-19 06:57:44,247 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-19 06:57:44,247 INFO L87 Difference]: Start difference. First operand 107 states and 130 transitions. Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 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) [2022-11-19 06:57:44,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:57:44,363 INFO L93 Difference]: Finished difference Result 282 states and 334 transitions. [2022-11-19 06:57:44,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-19 06:57:44,364 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 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 22 [2022-11-19 06:57:44,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:57:44,367 INFO L225 Difference]: With dead ends: 282 [2022-11-19 06:57:44,368 INFO L226 Difference]: Without dead ends: 282 [2022-11-19 06:57:44,368 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-19 06:57:44,369 INFO L413 NwaCegarLoop]: 85 mSDtfsCounter, 182 mSDsluCounter, 179 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 192 SdHoareTripleChecker+Valid, 264 SdHoareTripleChecker+Invalid, 78 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 06:57:44,370 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [192 Valid, 264 Invalid, 78 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 66 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 06:57:44,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 282 states. [2022-11-19 06:57:44,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 282 to 109. [2022-11-19 06:57:44,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 66 states have (on average 1.606060606060606) internal successors, (106), 93 states have internal predecessors, (106), 14 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2022-11-19 06:57:44,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 133 transitions. [2022-11-19 06:57:44,384 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 133 transitions. Word has length 22 [2022-11-19 06:57:44,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:57:44,385 INFO L495 AbstractCegarLoop]: Abstraction has 109 states and 133 transitions. [2022-11-19 06:57:44,385 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 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) [2022-11-19 06:57:44,385 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 133 transitions. [2022-11-19 06:57:44,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-11-19 06:57:44,390 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:57:44,390 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 06:57:44,402 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18e0f2b5-4226-4767-8bd2-110427c66437/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-11-19 06:57:44,597 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18e0f2b5-4226-4767-8bd2-110427c66437/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 06:57:44,597 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2022-11-19 06:57:44,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:57:44,598 INFO L85 PathProgramCache]: Analyzing trace with hash -1966086971, now seen corresponding path program 1 times [2022-11-19 06:57:44,598 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 06:57:44,598 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [282794652] [2022-11-19 06:57:44,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:57:44,598 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 06:57:44,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:57:45,383 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-19 06:57:45,383 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 06:57:45,383 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [282794652] [2022-11-19 06:57:45,383 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [282794652] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 06:57:45,383 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 06:57:45,383 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-11-19 06:57:45,383 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [803792217] [2022-11-19 06:57:45,383 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 06:57:45,384 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-19 06:57:45,384 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 06:57:45,384 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-19 06:57:45,384 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2022-11-19 06:57:45,385 INFO L87 Difference]: Start difference. First operand 109 states and 133 transitions. Second operand has 10 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 8 states have internal predecessors, (14), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-19 06:57:46,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:57:46,018 INFO L93 Difference]: Finished difference Result 112 states and 132 transitions. [2022-11-19 06:57:46,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-19 06:57:46,019 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 8 states have internal predecessors, (14), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 25 [2022-11-19 06:57:46,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:57:46,020 INFO L225 Difference]: With dead ends: 112 [2022-11-19 06:57:46,020 INFO L226 Difference]: Without dead ends: 112 [2022-11-19 06:57:46,020 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2022-11-19 06:57:46,021 INFO L413 NwaCegarLoop]: 54 mSDtfsCounter, 312 mSDsluCounter, 159 mSDsCounter, 0 mSdLazyCounter, 243 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 315 SdHoareTripleChecker+Valid, 213 SdHoareTripleChecker+Invalid, 284 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 243 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-19 06:57:46,021 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [315 Valid, 213 Invalid, 284 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 243 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-19 06:57:46,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2022-11-19 06:57:46,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 109. [2022-11-19 06:57:46,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 66 states have (on average 1.5909090909090908) internal successors, (105), 93 states have internal predecessors, (105), 14 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2022-11-19 06:57:46,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 132 transitions. [2022-11-19 06:57:46,027 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 132 transitions. Word has length 25 [2022-11-19 06:57:46,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:57:46,027 INFO L495 AbstractCegarLoop]: Abstraction has 109 states and 132 transitions. [2022-11-19 06:57:46,028 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 8 states have internal predecessors, (14), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-19 06:57:46,028 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 132 transitions. [2022-11-19 06:57:46,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-11-19 06:57:46,029 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:57:46,029 INFO L195 NwaCegarLoop]: trace histogram [4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 06:57:46,029 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-19 06:57:46,029 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2022-11-19 06:57:46,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:57:46,030 INFO L85 PathProgramCache]: Analyzing trace with hash 118458110, now seen corresponding path program 1 times [2022-11-19 06:57:46,030 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 06:57:46,030 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [183458346] [2022-11-19 06:57:46,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:57:46,030 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 06:57:46,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:57:46,510 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-19 06:57:46,511 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 06:57:46,511 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [183458346] [2022-11-19 06:57:46,511 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [183458346] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 06:57:46,511 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [897496200] [2022-11-19 06:57:46,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:57:46,511 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 06:57:46,511 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18e0f2b5-4226-4767-8bd2-110427c66437/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 06:57:46,514 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18e0f2b5-4226-4767-8bd2-110427c66437/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 06:57:46,538 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18e0f2b5-4226-4767-8bd2-110427c66437/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-19 06:57:46,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:57:46,615 INFO L263 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 59 conjunts are in the unsatisfiable core [2022-11-19 06:57:46,620 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 06:57:46,637 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2022-11-19 06:57:46,980 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 17 [2022-11-19 06:57:47,067 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:57:47,068 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:57:47,084 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-19 06:57:47,084 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 34 [2022-11-19 06:57:47,104 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 25 treesize of output 20 [2022-11-19 06:57:47,392 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 35 treesize of output 29 [2022-11-19 06:57:47,651 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-19 06:57:47,651 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 06:57:48,298 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-19 06:57:48,299 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 89 treesize of output 91 [2022-11-19 06:57:51,140 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [897496200] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 06:57:51,140 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1640055796] [2022-11-19 06:57:51,143 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2022-11-19 06:57:51,143 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 06:57:51,143 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 06:57:51,144 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 06:57:51,144 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 06:57:51,220 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:57:51,221 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:57:51,223 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:57:51,224 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 34 [2022-11-19 06:57:51,259 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:57:51,260 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 22 treesize of output 22 [2022-11-19 06:57:51,299 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:57:51,301 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:57:51,325 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-19 06:57:51,326 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-19 06:57:51,379 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:57:51,381 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:57:51,404 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-19 06:57:51,405 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-19 06:57:51,527 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:57:51,529 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:57:51,555 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-19 06:57:51,556 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-19 06:57:51,629 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:57:51,630 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:57:51,650 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-19 06:57:51,650 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-19 06:57:51,793 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:57:51,795 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:57:51,819 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-19 06:57:51,820 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-19 06:57:51,908 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:57:51,910 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:57:51,937 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-19 06:57:51,938 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-19 06:57:52,077 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:57:52,079 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:57:52,080 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 36 treesize of output 32 [2022-11-19 06:57:52,197 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:57:52,199 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:57:52,201 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:57:52,203 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:57:52,205 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:57:52,208 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:57:52,210 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:57:52,213 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:57:52,215 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:57:52,217 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:57:52,220 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:57:52,222 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:57:52,224 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:57:52,226 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 18 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 63 [2022-11-19 06:57:52,265 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:57:52,266 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 43 treesize of output 39 [2022-11-19 06:57:53,560 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:57:53,561 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:57:53,581 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-19 06:57:53,582 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-19 06:57:53,652 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:57:53,653 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:57:53,674 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-19 06:57:53,674 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-19 06:57:53,731 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:57:53,732 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:57:53,753 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-19 06:57:53,753 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-19 06:57:53,781 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 59 for LOIs [2022-11-19 06:57:53,796 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 06:58:04,352 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2767#(and (<= |ULTIMATE.start_mkdup_~a#1.offset| 0) (<= |ULTIMATE.start_main_~n~0#1| 2147483647) (<= (+ (* |ULTIMATE.start_finddup_~i~1#1| 4) |ULTIMATE.start_finddup_~a#1.offset| 4) (select |#length| |ULTIMATE.start_finddup_~a#1.base|)) (<= 0 |ULTIMATE.start_finddup_~_i#1.offset|) (<= 0 |ULTIMATE.start_main_~#i~2#1.base|) (= |ULTIMATE.start_#Ultimate.meminit_#sizeOfFields#1| 4) (<= |ULTIMATE.start_#Ultimate.meminit_#product#1| 8589934588) (<= |ULTIMATE.start_finddup_#in~_i#1.offset| 0) (<= 0 |ULTIMATE.start_main_~a~0#1.offset|) (<= 0 |ULTIMATE.start_finddup_#in~_i#1.offset|) (<= |ULTIMATE.start_mkdup_~j~0#1| 2147483647) (<= 0 |ULTIMATE.start_mkdup_~a#1.offset|) (<= |ULTIMATE.start_mkdup_~i~0#1| 2147483647) (<= |ULTIMATE.start_finddup_~a#1.offset| 0) (<= |ULTIMATE.start_mkdup_~n#1| 2147483647) (not (<= (+ (* |ULTIMATE.start_finddup_~j~1#1| 4) |ULTIMATE.start_finddup_~a#1.offset| 4) (select |#length| |ULTIMATE.start_finddup_~a#1.base|))) (<= |ULTIMATE.start_mkdup_#in~a#1.offset| 0) (<= 0 (+ |ULTIMATE.start_mkdup_~x~0#1| 2147483648)) (<= |ULTIMATE.start_finddup_~_i#1.offset| 0) (<= 1 |ULTIMATE.start_finddup_#in~n#1|) (<= |ULTIMATE.start_#Ultimate.meminit_#amountOfFields#1| 2147483647) (<= 1 |ULTIMATE.start_#Ultimate.meminit_#amountOfFields#1|) (= (select (select |#memory_int| |ULTIMATE.start_finddup_~a#1.base|) (+ (* |ULTIMATE.start_finddup_~i~1#1| 4) |ULTIMATE.start_finddup_~a#1.offset|)) |ULTIMATE.start_finddup_#t~mem10#1|) (<= 0 |ULTIMATE.start_finddup_#in~_j#1.offset|) (<= 0 (+ |ULTIMATE.start_mkdup_~j~0#1| 2147483648)) (<= 0 |ULTIMATE.start_finddup_#in~_i#1.base|) (<= |ULTIMATE.start_mkdup_#in~n#1| 2147483647) (<= 0 |ULTIMATE.start_#Ultimate.meminit_#ptr#1.offset|) (<= 4 |ULTIMATE.start_#Ultimate.meminit_#product#1|) (<= |ULTIMATE.start_mkdup_~x~0#1| 2147483647) (<= 1 |ULTIMATE.start_mkdup_~n#1|) (<= 0 |ULTIMATE.start_finddup_~_i#1.base|) (= |ULTIMATE.start_finddup_~i~1#1| 0) (= |ULTIMATE.start_main_#t~malloc13#1.offset| 0) (<= |ULTIMATE.start_finddup_~n#1| 2147483647) (<= 1 |ULTIMATE.start_main_~n~0#1|) (<= |ULTIMATE.start_finddup_#in~n#1| 2147483647) (<= |ULTIMATE.start_finddup_#in~a#1.offset| 0) (= |ULTIMATE.start_main_~#j~2#1.offset| 0) (<= 0 |ULTIMATE.start_finddup_~_j#1.offset|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_mkdup_#in~a#1.offset|) (<= 0 |ULTIMATE.start_finddup_~_j#1.base|) (<= 0 |ULTIMATE.start_main_~#j~2#1.base|) (<= |ULTIMATE.start_finddup_~_j#1.offset| 0) (= (select |#valid| |ULTIMATE.start_finddup_~a#1.base|) 1) (<= 0 (+ |ULTIMATE.start_mkdup_~i~0#1| 2147483648)) (<= 0 |ULTIMATE.start_finddup_#in~a#1.offset|) (<= 0 |ULTIMATE.start_finddup_#in~_j#1.base|) (<= 1 |ULTIMATE.start_finddup_~n#1|) (<= 1 |ULTIMATE.start_mkdup_#in~n#1|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~a~0#1.offset| 0) (<= |ULTIMATE.start_#Ultimate.meminit_#ptr#1.offset| 0) (<= |ULTIMATE.start_finddup_#in~_j#1.offset| 0) (<= 0 (+ (* |ULTIMATE.start_finddup_~i~1#1| 4) |ULTIMATE.start_finddup_~a#1.offset|)) (= |#NULL.base| 0) (= |ULTIMATE.start_main_~#i~2#1.offset| 0))' at error location [2022-11-19 06:58:04,353 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 06:58:04,353 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-19 06:58:04,353 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 20 [2022-11-19 06:58:04,354 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1275800892] [2022-11-19 06:58:04,354 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-19 06:58:04,354 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-11-19 06:58:04,354 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 06:58:04,355 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-11-19 06:58:04,355 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=196, Invalid=1783, Unknown=1, NotChecked=0, Total=1980 [2022-11-19 06:58:04,356 INFO L87 Difference]: Start difference. First operand 109 states and 132 transitions. Second operand has 21 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 20 states have internal predecessors, (29), 3 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (8), 5 states have call predecessors, (8), 3 states have call successors, (8) [2022-11-19 06:58:05,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:58:05,383 INFO L93 Difference]: Finished difference Result 115 states and 138 transitions. [2022-11-19 06:58:05,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-11-19 06:58:05,384 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 20 states have internal predecessors, (29), 3 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (8), 5 states have call predecessors, (8), 3 states have call successors, (8) Word has length 25 [2022-11-19 06:58:05,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:58:05,385 INFO L225 Difference]: With dead ends: 115 [2022-11-19 06:58:05,385 INFO L226 Difference]: Without dead ends: 115 [2022-11-19 06:58:05,386 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 26 SyntacticMatches, 7 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 817 ImplicationChecksByTransitivity, 14.9s TimeCoverageRelationStatistics Valid=289, Invalid=2572, Unknown=1, NotChecked=0, Total=2862 [2022-11-19 06:58:05,387 INFO L413 NwaCegarLoop]: 65 mSDtfsCounter, 4 mSDsluCounter, 541 mSDsCounter, 0 mSdLazyCounter, 203 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 606 SdHoareTripleChecker+Invalid, 391 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 203 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 188 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-19 06:58:05,387 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 606 Invalid, 391 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 203 Invalid, 0 Unknown, 188 Unchecked, 0.2s Time] [2022-11-19 06:58:05,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2022-11-19 06:58:05,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 109. [2022-11-19 06:58:05,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 65 states have (on average 1.5846153846153845) internal successors, (103), 92 states have internal predecessors, (103), 14 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2022-11-19 06:58:05,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 130 transitions. [2022-11-19 06:58:05,392 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 130 transitions. Word has length 25 [2022-11-19 06:58:05,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:58:05,392 INFO L495 AbstractCegarLoop]: Abstraction has 109 states and 130 transitions. [2022-11-19 06:58:05,392 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 20 states have internal predecessors, (29), 3 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (8), 5 states have call predecessors, (8), 3 states have call successors, (8) [2022-11-19 06:58:05,393 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 130 transitions. [2022-11-19 06:58:05,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-11-19 06:58:05,393 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:58:05,393 INFO L195 NwaCegarLoop]: trace histogram [4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 06:58:05,406 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18e0f2b5-4226-4767-8bd2-110427c66437/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-19 06:58:05,594 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18e0f2b5-4226-4767-8bd2-110427c66437/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-19 06:58:05,594 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2022-11-19 06:58:05,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:58:05,595 INFO L85 PathProgramCache]: Analyzing trace with hash -618514571, now seen corresponding path program 1 times [2022-11-19 06:58:05,595 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 06:58:05,595 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [167159048] [2022-11-19 06:58:05,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:58:05,595 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 06:58:05,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:58:05,679 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-19 06:58:05,679 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 06:58:05,679 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [167159048] [2022-11-19 06:58:05,679 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [167159048] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 06:58:05,679 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [121552699] [2022-11-19 06:58:05,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:58:05,680 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 06:58:05,680 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18e0f2b5-4226-4767-8bd2-110427c66437/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 06:58:05,681 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18e0f2b5-4226-4767-8bd2-110427c66437/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 06:58:05,702 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18e0f2b5-4226-4767-8bd2-110427c66437/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-19 06:58:05,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:58:05,783 INFO L263 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-19 06:58:05,784 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 06:58:05,801 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-19 06:58:05,801 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 06:58:05,840 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-19 06:58:05,840 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [121552699] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 06:58:05,840 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [418584592] [2022-11-19 06:58:05,844 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2022-11-19 06:58:05,845 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 06:58:05,845 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 06:58:05,846 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 06:58:05,846 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 06:58:05,909 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:58:05,910 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:58:05,911 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:58:05,912 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 34 [2022-11-19 06:58:05,928 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:58:05,929 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 22 treesize of output 22 [2022-11-19 06:58:05,963 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:58:05,964 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:58:05,981 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-19 06:58:05,982 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-19 06:58:06,030 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:58:06,032 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:58:06,050 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-19 06:58:06,051 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-19 06:58:06,148 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:58:06,149 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:58:06,169 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-19 06:58:06,169 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-19 06:58:06,235 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:58:06,237 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:58:06,254 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-19 06:58:06,255 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-19 06:58:06,402 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:58:06,403 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:58:06,423 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-19 06:58:06,423 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-19 06:58:06,493 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:58:06,494 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:58:06,516 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-19 06:58:06,517 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-19 06:58:06,635 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:58:06,636 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:58:06,637 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 36 treesize of output 32 [2022-11-19 06:58:06,722 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:58:06,725 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:58:06,726 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 43 treesize of output 39 [2022-11-19 06:58:06,776 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:58:06,778 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:58:06,780 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:58:06,781 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:58:06,783 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:58:06,785 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:58:06,787 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:58:06,789 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:58:06,791 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:58:06,792 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:58:06,794 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:58:06,796 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:58:06,797 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:58:06,799 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 18 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 63 [2022-11-19 06:58:09,057 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:58:09,059 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:58:09,081 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-19 06:58:09,081 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-19 06:58:09,140 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:58:09,142 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:58:09,168 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-19 06:58:09,169 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-19 06:58:09,235 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:58:09,237 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:58:09,256 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-19 06:58:09,257 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-19 06:58:09,287 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 59 for LOIs [2022-11-19 06:58:09,303 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 06:58:17,418 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3186#(and (<= |ULTIMATE.start_mkdup_~a#1.offset| 0) (<= |ULTIMATE.start_main_~n~0#1| 2147483647) (<= 0 |ULTIMATE.start_finddup_~_i#1.offset|) (<= 0 |ULTIMATE.start_main_~#i~2#1.base|) (= |ULTIMATE.start_#Ultimate.meminit_#sizeOfFields#1| 4) (<= |ULTIMATE.start_#Ultimate.meminit_#product#1| 8589934588) (<= |ULTIMATE.start_finddup_#in~_i#1.offset| 0) (<= 0 |ULTIMATE.start_main_~a~0#1.offset|) (<= 0 |ULTIMATE.start_finddup_#in~_i#1.offset|) (<= |ULTIMATE.start_mkdup_~j~0#1| 2147483647) (<= 0 |ULTIMATE.start_mkdup_~a#1.offset|) (<= |ULTIMATE.start_mkdup_~i~0#1| 2147483647) (<= |ULTIMATE.start_finddup_~a#1.offset| 0) (<= |ULTIMATE.start_mkdup_~n#1| 2147483647) (<= |ULTIMATE.start_mkdup_#in~a#1.offset| 0) (<= 0 (+ |ULTIMATE.start_mkdup_~x~0#1| 2147483648)) (<= |ULTIMATE.start_finddup_~_i#1.offset| 0) (<= 1 |ULTIMATE.start_finddup_#in~n#1|) (<= |ULTIMATE.start_#Ultimate.meminit_#amountOfFields#1| 2147483647) (<= 0 |ULTIMATE.start_finddup_~a#1.offset|) (<= 1 |ULTIMATE.start_#Ultimate.meminit_#amountOfFields#1|) (<= 1 |ULTIMATE.start_finddup_~j~1#1|) (<= 0 |ULTIMATE.start_finddup_~i~1#1|) (<= 0 |ULTIMATE.start_finddup_#in~_j#1.offset|) (<= 0 (+ |ULTIMATE.start_mkdup_~j~0#1| 2147483648)) (<= 0 |ULTIMATE.start_finddup_#in~_i#1.base|) (<= |ULTIMATE.start_mkdup_#in~n#1| 2147483647) (<= 0 |ULTIMATE.start_#Ultimate.meminit_#ptr#1.offset|) (<= 4 |ULTIMATE.start_#Ultimate.meminit_#product#1|) (<= |ULTIMATE.start_mkdup_~x~0#1| 2147483647) (<= 1 |ULTIMATE.start_mkdup_~n#1|) (<= 0 |ULTIMATE.start_finddup_~_i#1.base|) (= |ULTIMATE.start_main_#t~malloc13#1.offset| 0) (<= |ULTIMATE.start_finddup_~n#1| 2147483647) (<= 1 |ULTIMATE.start_main_~n~0#1|) (<= |ULTIMATE.start_finddup_#in~n#1| 2147483647) (<= |ULTIMATE.start_finddup_#in~a#1.offset| 0) (= |ULTIMATE.start_main_~#j~2#1.offset| 0) (<= 0 |ULTIMATE.start_finddup_~_j#1.offset|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_mkdup_#in~a#1.offset|) (<= 0 |ULTIMATE.start_finddup_~_j#1.base|) (<= 0 |ULTIMATE.start_main_~#j~2#1.base|) (<= |ULTIMATE.start_finddup_~_j#1.offset| 0) (<= 0 (+ |ULTIMATE.start_mkdup_~i~0#1| 2147483648)) (<= 0 |ULTIMATE.start_finddup_#in~a#1.offset|) (<= 0 |ULTIMATE.start_finddup_#in~_j#1.base|) (<= 1 |ULTIMATE.start_finddup_~n#1|) (<= 1 |ULTIMATE.start_mkdup_#in~n#1|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~a~0#1.offset| 0) (not (<= (+ (* |ULTIMATE.start_finddup_~i~1#1| 4) |ULTIMATE.start_finddup_~a#1.offset| 4) (select |#length| |ULTIMATE.start_finddup_~a#1.base|))) (<= |ULTIMATE.start_#Ultimate.meminit_#ptr#1.offset| 0) (<= |ULTIMATE.start_finddup_#in~_j#1.offset| 0) (= |#NULL.base| 0) (= |ULTIMATE.start_main_~#i~2#1.offset| 0))' at error location [2022-11-19 06:58:17,419 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 06:58:17,419 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 06:58:17,419 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 6 [2022-11-19 06:58:17,419 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1961566889] [2022-11-19 06:58:17,420 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 06:58:17,426 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-19 06:58:17,426 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 06:58:17,427 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-19 06:58:17,427 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=384, Unknown=0, NotChecked=0, Total=462 [2022-11-19 06:58:17,428 INFO L87 Difference]: Start difference. First operand 109 states and 130 transitions. Second operand has 6 states, 6 states have (on average 2.5) internal successors, (15), 6 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) [2022-11-19 06:58:17,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:58:17,687 INFO L93 Difference]: Finished difference Result 371 states and 439 transitions. [2022-11-19 06:58:17,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-19 06:58:17,688 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 6 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 26 [2022-11-19 06:58:17,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:58:17,690 INFO L225 Difference]: With dead ends: 371 [2022-11-19 06:58:17,690 INFO L226 Difference]: Without dead ends: 371 [2022-11-19 06:58:17,691 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 58 SyntacticMatches, 4 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 8.2s TimeCoverageRelationStatistics Valid=89, Invalid=463, Unknown=0, NotChecked=0, Total=552 [2022-11-19 06:58:17,691 INFO L413 NwaCegarLoop]: 108 mSDtfsCounter, 304 mSDsluCounter, 435 mSDsCounter, 0 mSdLazyCounter, 142 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 314 SdHoareTripleChecker+Valid, 543 SdHoareTripleChecker+Invalid, 172 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 142 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-19 06:58:17,692 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [314 Valid, 543 Invalid, 172 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 142 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-19 06:58:17,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 371 states. [2022-11-19 06:58:17,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 371 to 119. [2022-11-19 06:58:17,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 75 states have (on average 1.6) internal successors, (120), 102 states have internal predecessors, (120), 14 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2022-11-19 06:58:17,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 147 transitions. [2022-11-19 06:58:17,714 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 147 transitions. Word has length 26 [2022-11-19 06:58:17,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:58:17,715 INFO L495 AbstractCegarLoop]: Abstraction has 119 states and 147 transitions. [2022-11-19 06:58:17,715 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 6 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) [2022-11-19 06:58:17,715 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 147 transitions. [2022-11-19 06:58:17,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-11-19 06:58:17,716 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:58:17,721 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 06:58:17,727 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18e0f2b5-4226-4767-8bd2-110427c66437/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-19 06:58:17,926 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18e0f2b5-4226-4767-8bd2-110427c66437/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 06:58:17,927 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2022-11-19 06:58:17,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:58:17,927 INFO L85 PathProgramCache]: Analyzing trace with hash -641204124, now seen corresponding path program 1 times [2022-11-19 06:58:17,928 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 06:58:17,928 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [336968698] [2022-11-19 06:58:17,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:58:17,928 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 06:58:17,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:58:18,021 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-19 06:58:18,022 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 06:58:18,023 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [336968698] [2022-11-19 06:58:18,023 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [336968698] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 06:58:18,023 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [495631108] [2022-11-19 06:58:18,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:58:18,023 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 06:58:18,024 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18e0f2b5-4226-4767-8bd2-110427c66437/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 06:58:18,025 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18e0f2b5-4226-4767-8bd2-110427c66437/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 06:58:18,050 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18e0f2b5-4226-4767-8bd2-110427c66437/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-19 06:58:18,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:58:18,148 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-19 06:58:18,151 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 06:58:18,168 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-19 06:58:18,168 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 06:58:18,215 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-19 06:58:18,217 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [495631108] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 06:58:18,217 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1247761950] [2022-11-19 06:58:18,220 INFO L159 IcfgInterpreter]: Started Sifa with 22 locations of interest [2022-11-19 06:58:18,220 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 06:58:18,221 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 06:58:18,221 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 06:58:18,221 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 06:58:18,287 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:58:18,289 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 22 treesize of output 22 [2022-11-19 06:58:18,308 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:58:18,310 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:58:18,311 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:58:18,312 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 34 [2022-11-19 06:58:18,366 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:58:18,368 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:58:18,391 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-19 06:58:18,391 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-19 06:58:18,440 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:58:18,441 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:58:18,460 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-19 06:58:18,460 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-19 06:58:18,584 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:58:18,585 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:58:18,631 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-19 06:58:18,632 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-19 06:58:18,720 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:58:18,721 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:58:18,752 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-19 06:58:18,753 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-19 06:58:18,899 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:58:18,901 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:58:18,924 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-19 06:58:18,925 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-19 06:58:19,006 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:58:19,007 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:58:19,033 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-19 06:58:19,033 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-19 06:58:19,186 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:58:19,188 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:58:19,189 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 36 treesize of output 32 [2022-11-19 06:58:19,281 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:58:19,283 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:58:19,284 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 43 treesize of output 39 [2022-11-19 06:58:19,336 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:58:19,338 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:58:19,340 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:58:19,342 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:58:19,344 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:58:19,346 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:58:19,348 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:58:19,350 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:58:19,352 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:58:19,354 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:58:19,356 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:58:19,359 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:58:19,361 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:58:19,362 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 18 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 63 [2022-11-19 06:58:21,747 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:58:21,748 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:58:21,776 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-19 06:58:21,776 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-19 06:58:21,832 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:58:21,834 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:58:21,858 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-19 06:58:21,858 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-19 06:58:21,909 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:58:21,911 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:58:21,932 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-19 06:58:21,933 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-19 06:58:21,961 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 10 for LOIs [2022-11-19 06:58:21,966 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 59 for LOIs [2022-11-19 06:58:21,982 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 06:58:28,994 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3869#(and (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-19 06:58:28,994 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 06:58:28,994 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 06:58:28,994 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 5 [2022-11-19 06:58:28,994 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [832916026] [2022-11-19 06:58:28,994 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 06:58:28,995 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-19 06:58:28,995 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 06:58:28,995 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-19 06:58:28,996 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=465, Unknown=0, NotChecked=0, Total=552 [2022-11-19 06:58:28,996 INFO L87 Difference]: Start difference. First operand 119 states and 147 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-19 06:58:29,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:58:29,097 INFO L93 Difference]: Finished difference Result 165 states and 197 transitions. [2022-11-19 06:58:29,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-19 06:58:29,098 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 29 [2022-11-19 06:58:29,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:58:29,099 INFO L225 Difference]: With dead ends: 165 [2022-11-19 06:58:29,099 INFO L226 Difference]: Without dead ends: 165 [2022-11-19 06:58:29,100 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 64 SyntacticMatches, 4 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 7.1s TimeCoverageRelationStatistics Valid=97, Invalid=553, Unknown=0, NotChecked=0, Total=650 [2022-11-19 06:58:29,101 INFO L413 NwaCegarLoop]: 74 mSDtfsCounter, 160 mSDsluCounter, 126 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 160 SdHoareTripleChecker+Valid, 200 SdHoareTripleChecker+Invalid, 61 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 06:58:29,101 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [160 Valid, 200 Invalid, 61 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 06:58:29,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2022-11-19 06:58:29,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 119. [2022-11-19 06:58:29,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 75 states have (on average 1.5733333333333333) internal successors, (118), 102 states have internal predecessors, (118), 14 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2022-11-19 06:58:29,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 145 transitions. [2022-11-19 06:58:29,107 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 145 transitions. Word has length 29 [2022-11-19 06:58:29,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:58:29,107 INFO L495 AbstractCegarLoop]: Abstraction has 119 states and 145 transitions. [2022-11-19 06:58:29,108 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-19 06:58:29,108 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 145 transitions. [2022-11-19 06:58:29,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-11-19 06:58:29,109 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:58:29,109 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 06:58:29,114 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18e0f2b5-4226-4767-8bd2-110427c66437/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-19 06:58:29,314 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18e0f2b5-4226-4767-8bd2-110427c66437/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-11-19 06:58:29,314 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2022-11-19 06:58:29,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:58:29,315 INFO L85 PathProgramCache]: Analyzing trace with hash 1790809280, now seen corresponding path program 1 times [2022-11-19 06:58:29,315 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 06:58:29,315 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1148343648] [2022-11-19 06:58:29,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:58:29,316 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 06:58:29,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:58:29,394 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-19 06:58:29,395 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 06:58:29,395 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1148343648] [2022-11-19 06:58:29,395 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1148343648] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 06:58:29,395 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 06:58:29,395 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-19 06:58:29,395 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [347984997] [2022-11-19 06:58:29,395 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 06:58:29,397 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-19 06:58:29,397 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 06:58:29,398 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-19 06:58:29,398 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-19 06:58:29,398 INFO L87 Difference]: Start difference. First operand 119 states and 145 transitions. Second operand has 6 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-19 06:58:29,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:58:29,504 INFO L93 Difference]: Finished difference Result 169 states and 200 transitions. [2022-11-19 06:58:29,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-19 06:58:29,505 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 29 [2022-11-19 06:58:29,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:58:29,508 INFO L225 Difference]: With dead ends: 169 [2022-11-19 06:58:29,509 INFO L226 Difference]: Without dead ends: 169 [2022-11-19 06:58:29,510 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-11-19 06:58:29,510 INFO L413 NwaCegarLoop]: 98 mSDtfsCounter, 88 mSDsluCounter, 332 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 430 SdHoareTripleChecker+Invalid, 95 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 06:58:29,512 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [88 Valid, 430 Invalid, 95 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 85 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 06:58:29,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2022-11-19 06:58:29,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 125. [2022-11-19 06:58:29,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 79 states have (on average 1.5443037974683544) internal successors, (122), 107 states have internal predecessors, (122), 15 states have call successors, (15), 4 states have call predecessors, (15), 4 states have return successors, (14), 13 states have call predecessors, (14), 14 states have call successors, (14) [2022-11-19 06:58:29,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 151 transitions. [2022-11-19 06:58:29,523 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 151 transitions. Word has length 29 [2022-11-19 06:58:29,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:58:29,523 INFO L495 AbstractCegarLoop]: Abstraction has 125 states and 151 transitions. [2022-11-19 06:58:29,524 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-19 06:58:29,524 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 151 transitions. [2022-11-19 06:58:29,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-11-19 06:58:29,526 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:58:29,527 INFO L195 NwaCegarLoop]: trace histogram [4, 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] [2022-11-19 06:58:29,527 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-11-19 06:58:29,527 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2022-11-19 06:58:29,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:58:29,528 INFO L85 PathProgramCache]: Analyzing trace with hash -284603141, now seen corresponding path program 2 times [2022-11-19 06:58:29,528 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 06:58:29,528 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2134313270] [2022-11-19 06:58:29,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:58:29,528 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 06:58:29,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:58:30,783 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-19 06:58:30,784 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 06:58:30,784 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2134313270] [2022-11-19 06:58:30,784 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2134313270] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 06:58:30,784 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [782951475] [2022-11-19 06:58:30,784 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-19 06:58:30,784 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 06:58:30,785 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18e0f2b5-4226-4767-8bd2-110427c66437/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 06:58:30,787 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18e0f2b5-4226-4767-8bd2-110427c66437/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 06:58:30,818 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18e0f2b5-4226-4767-8bd2-110427c66437/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-19 06:58:30,901 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-19 06:58:30,901 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 06:58:30,904 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 58 conjunts are in the unsatisfiable core [2022-11-19 06:58:30,908 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 06:58:30,926 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-19 06:58:31,344 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2022-11-19 06:58:31,449 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:58:31,450 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 19 [2022-11-19 06:58:31,461 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 28 treesize of output 22 [2022-11-19 06:58:31,810 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:58:31,831 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-19 06:58:31,832 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 36 treesize of output 62 [2022-11-19 06:58:32,269 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 8 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-19 06:58:32,270 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 06:58:34,760 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-19 06:58:34,761 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 409 treesize of output 369 [2022-11-19 06:58:36,758 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-19 06:58:36,758 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [782951475] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 06:58:36,759 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1570220333] [2022-11-19 06:58:36,761 INFO L159 IcfgInterpreter]: Started Sifa with 22 locations of interest [2022-11-19 06:58:36,761 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 06:58:36,762 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 06:58:36,762 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 06:58:36,762 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 06:58:36,826 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:58:36,827 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 22 treesize of output 22 [2022-11-19 06:58:36,844 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:58:36,845 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:58:36,847 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:58:36,848 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 34 [2022-11-19 06:58:36,884 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:58:36,885 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:58:36,905 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-19 06:58:36,906 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-19 06:58:36,953 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:58:36,954 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:58:36,974 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-19 06:58:36,975 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-19 06:58:37,091 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:58:37,092 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:58:37,110 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-19 06:58:37,110 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-19 06:58:37,176 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:58:37,177 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:58:37,203 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-19 06:58:37,203 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-19 06:58:37,336 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:58:37,337 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:58:37,358 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-19 06:58:37,359 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-19 06:58:37,431 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:58:37,432 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:58:37,454 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-19 06:58:37,455 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-19 06:58:37,589 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:58:37,590 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:58:37,592 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 36 treesize of output 32 [2022-11-19 06:58:37,669 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:58:37,670 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:58:37,671 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 43 treesize of output 39 [2022-11-19 06:58:37,719 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:58:37,721 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:58:37,723 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:58:37,725 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:58:37,727 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:58:37,730 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:58:37,732 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:58:37,734 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:58:37,736 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:58:37,738 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:58:37,741 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:58:37,743 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:58:37,745 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:58:37,747 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 18 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 63 [2022-11-19 06:58:40,031 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:58:40,033 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:58:40,055 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-19 06:58:40,055 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-19 06:58:40,104 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:58:40,106 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:58:40,128 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-19 06:58:40,129 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-19 06:58:40,179 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:58:40,180 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:58:40,202 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-19 06:58:40,203 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-19 06:58:40,230 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 10 for LOIs [2022-11-19 06:58:40,234 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 59 for LOIs [2022-11-19 06:58:40,247 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 06:58:52,457 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4695#(and (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-19 06:58:52,457 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 06:58:52,458 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 06:58:52,458 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 14, 13] total 35 [2022-11-19 06:58:52,458 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [313358470] [2022-11-19 06:58:52,458 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 06:58:52,459 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-11-19 06:58:52,459 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 06:58:52,459 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-11-19 06:58:52,460 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=259, Invalid=2601, Unknown=2, NotChecked=0, Total=2862 [2022-11-19 06:58:52,461 INFO L87 Difference]: Start difference. First operand 125 states and 151 transitions. Second operand has 35 states, 29 states have (on average 1.6896551724137931) internal successors, (49), 35 states have internal predecessors, (49), 5 states have call successors, (11), 3 states have call predecessors, (11), 5 states have return successors, (10), 7 states have call predecessors, (10), 4 states have call successors, (10) [2022-11-19 06:58:54,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:58:54,561 INFO L93 Difference]: Finished difference Result 327 states and 386 transitions. [2022-11-19 06:58:54,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-11-19 06:58:54,562 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 29 states have (on average 1.6896551724137931) internal successors, (49), 35 states have internal predecessors, (49), 5 states have call successors, (11), 3 states have call predecessors, (11), 5 states have return successors, (10), 7 states have call predecessors, (10), 4 states have call successors, (10) Word has length 31 [2022-11-19 06:58:54,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:58:54,565 INFO L225 Difference]: With dead ends: 327 [2022-11-19 06:58:54,565 INFO L226 Difference]: Without dead ends: 326 [2022-11-19 06:58:54,566 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 45 SyntacticMatches, 6 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1069 ImplicationChecksByTransitivity, 16.2s TimeCoverageRelationStatistics Valid=293, Invalid=2897, Unknown=2, NotChecked=0, Total=3192 [2022-11-19 06:58:54,567 INFO L413 NwaCegarLoop]: 161 mSDtfsCounter, 432 mSDsluCounter, 1974 mSDsCounter, 0 mSdLazyCounter, 1278 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 456 SdHoareTripleChecker+Valid, 2135 SdHoareTripleChecker+Invalid, 1567 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 1278 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 252 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-11-19 06:58:54,568 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [456 Valid, 2135 Invalid, 1567 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 1278 Invalid, 0 Unknown, 252 Unchecked, 1.9s Time] [2022-11-19 06:58:54,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 326 states. [2022-11-19 06:58:54,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 326 to 127. [2022-11-19 06:58:54,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 81 states have (on average 1.5185185185185186) internal successors, (123), 109 states have internal predecessors, (123), 15 states have call successors, (15), 4 states have call predecessors, (15), 4 states have return successors, (14), 13 states have call predecessors, (14), 14 states have call successors, (14) [2022-11-19 06:58:54,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 152 transitions. [2022-11-19 06:58:54,577 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 152 transitions. Word has length 31 [2022-11-19 06:58:54,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:58:54,578 INFO L495 AbstractCegarLoop]: Abstraction has 127 states and 152 transitions. [2022-11-19 06:58:54,578 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 29 states have (on average 1.6896551724137931) internal successors, (49), 35 states have internal predecessors, (49), 5 states have call successors, (11), 3 states have call predecessors, (11), 5 states have return successors, (10), 7 states have call predecessors, (10), 4 states have call successors, (10) [2022-11-19 06:58:54,578 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 152 transitions. [2022-11-19 06:58:54,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-11-19 06:58:54,579 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:58:54,580 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 06:58:54,590 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18e0f2b5-4226-4767-8bd2-110427c66437/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-19 06:58:54,786 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18e0f2b5-4226-4767-8bd2-110427c66437/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-11-19 06:58:54,787 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2022-11-19 06:58:54,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:58:54,787 INFO L85 PathProgramCache]: Analyzing trace with hash 1798148022, now seen corresponding path program 2 times [2022-11-19 06:58:54,787 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 06:58:54,788 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1070324565] [2022-11-19 06:58:54,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:58:54,788 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 06:58:54,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:58:54,999 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-19 06:58:55,000 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 06:58:55,000 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1070324565] [2022-11-19 06:58:55,000 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1070324565] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 06:58:55,000 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1240774925] [2022-11-19 06:58:55,001 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-19 06:58:55,001 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 06:58:55,001 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18e0f2b5-4226-4767-8bd2-110427c66437/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 06:58:55,003 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18e0f2b5-4226-4767-8bd2-110427c66437/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 06:58:55,022 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18e0f2b5-4226-4767-8bd2-110427c66437/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-19 06:58:55,101 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-19 06:58:55,102 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 06:58:55,103 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-19 06:58:55,105 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 06:58:55,297 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-19 06:58:55,297 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 06:58:55,516 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 10 treesize of output 8 [2022-11-19 06:58:55,602 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-19 06:58:55,602 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1240774925] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 06:58:55,602 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1414663839] [2022-11-19 06:58:55,604 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2022-11-19 06:58:55,605 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 06:58:55,605 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 06:58:55,605 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 06:58:55,605 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 06:58:55,673 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:58:55,674 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:58:55,676 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:58:55,677 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 34 [2022-11-19 06:58:55,695 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:58:55,696 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 22 treesize of output 22 [2022-11-19 06:58:55,739 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:58:55,740 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:58:55,767 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-19 06:58:55,768 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-19 06:58:55,827 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:58:55,829 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:58:55,855 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-19 06:58:55,855 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-19 06:58:55,974 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:58:55,976 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:58:56,003 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-19 06:58:56,003 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-19 06:58:56,087 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:58:56,089 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:58:56,111 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-19 06:58:56,112 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-19 06:58:56,253 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:58:56,255 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:58:56,281 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-19 06:58:56,281 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-19 06:58:56,355 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:58:56,356 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:58:56,378 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-19 06:58:56,379 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-19 06:58:56,510 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:58:56,511 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:58:56,512 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 36 treesize of output 32 [2022-11-19 06:58:56,589 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:58:56,591 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:58:56,592 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 43 treesize of output 39 [2022-11-19 06:58:56,632 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:58:56,635 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:58:56,637 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:58:56,639 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:58:56,640 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:58:56,642 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:58:56,644 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:58:56,646 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:58:56,648 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:58:56,650 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:58:56,652 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:58:56,654 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:58:56,660 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:58:56,662 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 18 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 63 [2022-11-19 06:58:58,686 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:58:58,688 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:58:58,716 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-19 06:58:58,717 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-19 06:58:58,774 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:58:58,776 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:58:58,829 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-19 06:58:58,830 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-19 06:58:58,888 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:58:58,889 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:58:58,912 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-19 06:58:58,912 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-19 06:58:58,944 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 59 for LOIs [2022-11-19 06:58:58,962 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 06:59:06,572 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '5368#(and (<= |ULTIMATE.start_mkdup_~a#1.offset| 0) (<= |ULTIMATE.start_main_~n~0#1| 2147483647) (<= 0 |ULTIMATE.start_finddup_~_i#1.offset|) (<= 0 |ULTIMATE.start_main_~#i~2#1.base|) (= |ULTIMATE.start_#Ultimate.meminit_#sizeOfFields#1| 4) (<= |ULTIMATE.start_#Ultimate.meminit_#product#1| 8589934588) (<= |ULTIMATE.start_finddup_#in~_i#1.offset| 0) (<= 0 |ULTIMATE.start_main_~a~0#1.offset|) (<= 0 |ULTIMATE.start_finddup_#in~_i#1.offset|) (<= |ULTIMATE.start_mkdup_~j~0#1| 2147483647) (<= 0 |ULTIMATE.start_mkdup_~a#1.offset|) (<= |ULTIMATE.start_mkdup_~i~0#1| 2147483647) (<= |ULTIMATE.start_finddup_~a#1.offset| 0) (<= |ULTIMATE.start_mkdup_~n#1| 2147483647) (<= |ULTIMATE.start_mkdup_#in~a#1.offset| 0) (<= 0 (+ |ULTIMATE.start_mkdup_~x~0#1| 2147483648)) (<= |ULTIMATE.start_finddup_~_i#1.offset| 0) (<= 1 |ULTIMATE.start_finddup_#in~n#1|) (<= |ULTIMATE.start_#Ultimate.meminit_#amountOfFields#1| 2147483647) (<= 0 |ULTIMATE.start_finddup_~a#1.offset|) (<= 1 |ULTIMATE.start_#Ultimate.meminit_#amountOfFields#1|) (<= 1 |ULTIMATE.start_finddup_~j~1#1|) (<= 0 |ULTIMATE.start_finddup_~i~1#1|) (<= 0 |ULTIMATE.start_finddup_#in~_j#1.offset|) (<= 0 (+ |ULTIMATE.start_mkdup_~j~0#1| 2147483648)) (<= 0 |ULTIMATE.start_finddup_#in~_i#1.base|) (<= |ULTIMATE.start_mkdup_#in~n#1| 2147483647) (<= 0 |ULTIMATE.start_#Ultimate.meminit_#ptr#1.offset|) (<= 4 |ULTIMATE.start_#Ultimate.meminit_#product#1|) (<= |ULTIMATE.start_mkdup_~x~0#1| 2147483647) (<= 1 |ULTIMATE.start_mkdup_~n#1|) (<= 0 |ULTIMATE.start_finddup_~_i#1.base|) (= |ULTIMATE.start_main_#t~malloc13#1.offset| 0) (<= |ULTIMATE.start_finddup_~n#1| 2147483647) (<= 1 |ULTIMATE.start_main_~n~0#1|) (<= |ULTIMATE.start_finddup_#in~n#1| 2147483647) (<= |ULTIMATE.start_finddup_#in~a#1.offset| 0) (= |ULTIMATE.start_main_~#j~2#1.offset| 0) (<= 0 |ULTIMATE.start_finddup_~_j#1.offset|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_mkdup_#in~a#1.offset|) (<= 0 |ULTIMATE.start_finddup_~_j#1.base|) (<= 0 |ULTIMATE.start_main_~#j~2#1.base|) (<= |ULTIMATE.start_finddup_~_j#1.offset| 0) (<= 0 (+ |ULTIMATE.start_mkdup_~i~0#1| 2147483648)) (<= 0 |ULTIMATE.start_finddup_#in~a#1.offset|) (<= 0 |ULTIMATE.start_finddup_#in~_j#1.base|) (<= 1 |ULTIMATE.start_finddup_~n#1|) (<= 1 |ULTIMATE.start_mkdup_#in~n#1|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~a~0#1.offset| 0) (not (<= (+ (* |ULTIMATE.start_finddup_~i~1#1| 4) |ULTIMATE.start_finddup_~a#1.offset| 4) (select |#length| |ULTIMATE.start_finddup_~a#1.base|))) (<= |ULTIMATE.start_#Ultimate.meminit_#ptr#1.offset| 0) (<= |ULTIMATE.start_finddup_#in~_j#1.offset| 0) (= |#NULL.base| 0) (= |ULTIMATE.start_main_~#i~2#1.offset| 0))' at error location [2022-11-19 06:59:06,573 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 06:59:06,573 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 06:59:06,573 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 19 [2022-11-19 06:59:06,573 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1169373512] [2022-11-19 06:59:06,573 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 06:59:06,574 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-11-19 06:59:06,574 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 06:59:06,574 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-11-19 06:59:06,575 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=202, Invalid=1058, Unknown=0, NotChecked=0, Total=1260 [2022-11-19 06:59:06,575 INFO L87 Difference]: Start difference. First operand 127 states and 152 transitions. Second operand has 20 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 20 states have internal predecessors, (49), 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) [2022-11-19 06:59:07,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:59:07,788 INFO L93 Difference]: Finished difference Result 262 states and 306 transitions. [2022-11-19 06:59:07,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-19 06:59:07,789 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 20 states have internal predecessors, (49), 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 30 [2022-11-19 06:59:07,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:59:07,791 INFO L225 Difference]: With dead ends: 262 [2022-11-19 06:59:07,791 INFO L226 Difference]: Without dead ends: 262 [2022-11-19 06:59:07,792 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 696 ImplicationChecksByTransitivity, 8.3s TimeCoverageRelationStatistics Valid=391, Invalid=1865, Unknown=0, NotChecked=0, Total=2256 [2022-11-19 06:59:07,793 INFO L413 NwaCegarLoop]: 105 mSDtfsCounter, 1309 mSDsluCounter, 320 mSDsCounter, 0 mSdLazyCounter, 521 mSolverCounterSat, 216 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1309 SdHoareTripleChecker+Valid, 425 SdHoareTripleChecker+Invalid, 737 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 216 IncrementalHoareTripleChecker+Valid, 521 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-19 06:59:07,793 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1309 Valid, 425 Invalid, 737 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [216 Valid, 521 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-19 06:59:07,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262 states. [2022-11-19 06:59:07,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262 to 126. [2022-11-19 06:59:07,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 81 states have (on average 1.4938271604938271) internal successors, (121), 108 states have internal predecessors, (121), 15 states have call successors, (15), 4 states have call predecessors, (15), 4 states have return successors, (14), 13 states have call predecessors, (14), 14 states have call successors, (14) [2022-11-19 06:59:07,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 150 transitions. [2022-11-19 06:59:07,802 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 150 transitions. Word has length 30 [2022-11-19 06:59:07,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:59:07,802 INFO L495 AbstractCegarLoop]: Abstraction has 126 states and 150 transitions. [2022-11-19 06:59:07,803 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 20 states have internal predecessors, (49), 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) [2022-11-19 06:59:07,803 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 150 transitions. [2022-11-19 06:59:07,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-11-19 06:59:07,804 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:59:07,804 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 06:59:07,815 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18e0f2b5-4226-4767-8bd2-110427c66437/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2022-11-19 06:59:08,010 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18e0f2b5-4226-4767-8bd2-110427c66437/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-11-19 06:59:08,011 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2022-11-19 06:59:08,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:59:08,011 INFO L85 PathProgramCache]: Analyzing trace with hash -91986188, now seen corresponding path program 1 times [2022-11-19 06:59:08,011 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 06:59:08,011 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [14718484] [2022-11-19 06:59:08,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:59:08,012 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 06:59:08,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:59:08,256 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-19 06:59:08,256 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 06:59:08,256 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [14718484] [2022-11-19 06:59:08,256 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [14718484] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 06:59:08,257 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [107129607] [2022-11-19 06:59:08,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:59:08,257 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 06:59:08,257 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18e0f2b5-4226-4767-8bd2-110427c66437/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 06:59:08,258 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18e0f2b5-4226-4767-8bd2-110427c66437/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 06:59:08,273 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18e0f2b5-4226-4767-8bd2-110427c66437/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-19 06:59:08,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:59:08,382 INFO L263 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-19 06:59:08,383 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 06:59:08,585 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-19 06:59:08,585 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 06:59:08,674 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 31 treesize of output 27 [2022-11-19 06:59:08,816 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-19 06:59:08,816 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [107129607] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 06:59:08,816 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1169122855] [2022-11-19 06:59:08,818 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2022-11-19 06:59:08,818 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 06:59:08,818 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 06:59:08,819 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 06:59:08,819 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 06:59:08,881 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:59:08,883 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:59:08,884 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:59:08,885 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 34 [2022-11-19 06:59:08,902 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:59:08,903 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 22 treesize of output 22 [2022-11-19 06:59:08,938 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:59:08,940 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:59:08,966 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-19 06:59:08,967 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-19 06:59:09,016 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:59:09,017 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:59:09,039 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-19 06:59:09,040 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-19 06:59:09,152 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:59:09,154 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:59:09,182 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-19 06:59:09,183 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-19 06:59:09,259 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:59:09,261 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:59:09,286 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-19 06:59:09,287 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-19 06:59:09,397 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:59:09,398 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:59:09,416 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-19 06:59:09,417 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-19 06:59:09,485 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:59:09,487 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:59:09,511 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-19 06:59:09,511 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-19 06:59:09,607 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:59:09,609 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:59:09,609 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 36 treesize of output 32 [2022-11-19 06:59:09,691 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:59:09,691 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 43 treesize of output 39 [2022-11-19 06:59:09,743 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:59:09,744 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:59:09,746 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:59:09,748 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:59:09,749 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:59:09,751 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:59:09,753 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:59:09,754 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:59:09,756 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:59:09,758 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:59:09,759 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:59:09,761 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:59:09,763 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:59:09,764 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 18 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 63 [2022-11-19 06:59:11,369 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:59:11,371 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:59:11,395 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-19 06:59:11,396 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-19 06:59:11,439 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:59:11,440 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:59:11,463 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-19 06:59:11,464 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-19 06:59:11,512 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:59:11,513 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:59:11,533 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-19 06:59:11,534 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-19 06:59:11,559 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 59 for LOIs [2022-11-19 06:59:11,573 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 06:59:20,229 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '5999#(and (<= |ULTIMATE.start_mkdup_~a#1.offset| 0) (<= |ULTIMATE.start_main_~n~0#1| 2147483647) (<= (+ (* |ULTIMATE.start_finddup_~i~1#1| 4) |ULTIMATE.start_finddup_~a#1.offset| 4) (select |#length| |ULTIMATE.start_finddup_~a#1.base|)) (<= 0 |ULTIMATE.start_finddup_~_i#1.offset|) (<= 0 |ULTIMATE.start_main_~#i~2#1.base|) (= |ULTIMATE.start_#Ultimate.meminit_#sizeOfFields#1| 4) (<= |ULTIMATE.start_#Ultimate.meminit_#product#1| 8589934588) (<= |ULTIMATE.start_finddup_#in~_i#1.offset| 0) (<= 0 |ULTIMATE.start_main_~a~0#1.offset|) (<= 0 |ULTIMATE.start_finddup_#in~_i#1.offset|) (<= |ULTIMATE.start_mkdup_~j~0#1| 2147483647) (<= 0 |ULTIMATE.start_mkdup_~a#1.offset|) (<= |ULTIMATE.start_mkdup_~i~0#1| 2147483647) (<= |ULTIMATE.start_finddup_~a#1.offset| 0) (<= |ULTIMATE.start_mkdup_~n#1| 2147483647) (not (<= (+ (* |ULTIMATE.start_finddup_~j~1#1| 4) |ULTIMATE.start_finddup_~a#1.offset| 4) (select |#length| |ULTIMATE.start_finddup_~a#1.base|))) (<= |ULTIMATE.start_mkdup_#in~a#1.offset| 0) (<= 0 (+ |ULTIMATE.start_mkdup_~x~0#1| 2147483648)) (<= |ULTIMATE.start_finddup_~_i#1.offset| 0) (<= 1 |ULTIMATE.start_finddup_#in~n#1|) (<= |ULTIMATE.start_#Ultimate.meminit_#amountOfFields#1| 2147483647) (<= 0 |ULTIMATE.start_finddup_~a#1.offset|) (<= 1 |ULTIMATE.start_#Ultimate.meminit_#amountOfFields#1|) (= (select (select |#memory_int| |ULTIMATE.start_finddup_~a#1.base|) (+ (* |ULTIMATE.start_finddup_~i~1#1| 4) |ULTIMATE.start_finddup_~a#1.offset|)) |ULTIMATE.start_finddup_#t~mem10#1|) (<= 0 |ULTIMATE.start_finddup_#in~_j#1.offset|) (<= 0 (+ |ULTIMATE.start_mkdup_~j~0#1| 2147483648)) (<= 0 |ULTIMATE.start_finddup_#in~_i#1.base|) (<= |ULTIMATE.start_mkdup_#in~n#1| 2147483647) (<= 0 |ULTIMATE.start_#Ultimate.meminit_#ptr#1.offset|) (<= 4 |ULTIMATE.start_#Ultimate.meminit_#product#1|) (<= |ULTIMATE.start_mkdup_~x~0#1| 2147483647) (<= 1 |ULTIMATE.start_mkdup_~n#1|) (<= 0 |ULTIMATE.start_finddup_~_i#1.base|) (= |ULTIMATE.start_main_#t~malloc13#1.offset| 0) (<= |ULTIMATE.start_finddup_~n#1| 2147483647) (<= 1 |ULTIMATE.start_main_~n~0#1|) (<= |ULTIMATE.start_finddup_#in~n#1| 2147483647) (<= |ULTIMATE.start_finddup_#in~a#1.offset| 0) (= |ULTIMATE.start_main_~#j~2#1.offset| 0) (<= 0 |ULTIMATE.start_finddup_~_j#1.offset|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_mkdup_#in~a#1.offset|) (<= 0 |ULTIMATE.start_finddup_~_j#1.base|) (<= 0 |ULTIMATE.start_main_~#j~2#1.base|) (<= |ULTIMATE.start_finddup_~_j#1.offset| 0) (= (select |#valid| |ULTIMATE.start_finddup_~a#1.base|) 1) (<= 0 (+ |ULTIMATE.start_mkdup_~i~0#1| 2147483648)) (<= 0 |ULTIMATE.start_finddup_#in~a#1.offset|) (<= 0 |ULTIMATE.start_finddup_#in~_j#1.base|) (<= 1 |ULTIMATE.start_finddup_~n#1|) (<= 1 |ULTIMATE.start_mkdup_#in~n#1|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~a~0#1.offset| 0) (<= |ULTIMATE.start_#Ultimate.meminit_#ptr#1.offset| 0) (<= |ULTIMATE.start_finddup_#in~_j#1.offset| 0) (<= 0 (+ (* |ULTIMATE.start_finddup_~i~1#1| 4) |ULTIMATE.start_finddup_~a#1.offset|)) (= |#NULL.base| 0) (= |ULTIMATE.start_main_~#i~2#1.offset| 0))' at error location [2022-11-19 06:59:20,229 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 06:59:20,230 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 06:59:20,230 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 22 [2022-11-19 06:59:20,230 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [60110730] [2022-11-19 06:59:20,230 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 06:59:20,230 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-11-19 06:59:20,231 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 06:59:20,231 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-11-19 06:59:20,232 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=215, Invalid=1267, Unknown=0, NotChecked=0, Total=1482 [2022-11-19 06:59:20,232 INFO L87 Difference]: Start difference. First operand 126 states and 150 transitions. Second operand has 23 states, 22 states have (on average 2.5454545454545454) internal successors, (56), 23 states have internal predecessors, (56), 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) [2022-11-19 06:59:21,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:59:21,870 INFO L93 Difference]: Finished difference Result 301 states and 345 transitions. [2022-11-19 06:59:21,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-11-19 06:59:21,870 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 2.5454545454545454) internal successors, (56), 23 states have internal predecessors, (56), 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 31 [2022-11-19 06:59:21,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:59:21,872 INFO L225 Difference]: With dead ends: 301 [2022-11-19 06:59:21,872 INFO L226 Difference]: Without dead ends: 301 [2022-11-19 06:59:21,873 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 888 ImplicationChecksByTransitivity, 9.5s TimeCoverageRelationStatistics Valid=457, Invalid=2299, Unknown=0, NotChecked=0, Total=2756 [2022-11-19 06:59:21,874 INFO L413 NwaCegarLoop]: 122 mSDtfsCounter, 1329 mSDsluCounter, 592 mSDsCounter, 0 mSdLazyCounter, 898 mSolverCounterSat, 243 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1329 SdHoareTripleChecker+Valid, 714 SdHoareTripleChecker+Invalid, 1141 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 243 IncrementalHoareTripleChecker+Valid, 898 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-19 06:59:21,874 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1329 Valid, 714 Invalid, 1141 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [243 Valid, 898 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-11-19 06:59:21,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 301 states. [2022-11-19 06:59:21,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 301 to 126. [2022-11-19 06:59:21,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 81 states have (on average 1.4814814814814814) internal successors, (120), 108 states have internal predecessors, (120), 15 states have call successors, (15), 4 states have call predecessors, (15), 4 states have return successors, (14), 13 states have call predecessors, (14), 14 states have call successors, (14) [2022-11-19 06:59:21,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 149 transitions. [2022-11-19 06:59:21,882 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 149 transitions. Word has length 31 [2022-11-19 06:59:21,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:59:21,882 INFO L495 AbstractCegarLoop]: Abstraction has 126 states and 149 transitions. [2022-11-19 06:59:21,883 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 2.5454545454545454) internal successors, (56), 23 states have internal predecessors, (56), 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) [2022-11-19 06:59:21,883 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 149 transitions. [2022-11-19 06:59:21,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-11-19 06:59:21,884 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:59:21,884 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 06:59:21,893 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18e0f2b5-4226-4767-8bd2-110427c66437/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-19 06:59:22,089 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18e0f2b5-4226-4767-8bd2-110427c66437/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-11-19 06:59:22,089 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2022-11-19 06:59:22,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:59:22,089 INFO L85 PathProgramCache]: Analyzing trace with hash 1795586004, now seen corresponding path program 1 times [2022-11-19 06:59:22,090 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 06:59:22,090 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1896726523] [2022-11-19 06:59:22,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:59:22,090 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 06:59:22,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:59:22,238 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-11-19 06:59:22,239 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 06:59:22,239 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1896726523] [2022-11-19 06:59:22,239 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1896726523] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 06:59:22,239 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 06:59:22,239 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-19 06:59:22,240 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [374016128] [2022-11-19 06:59:22,240 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 06:59:22,241 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 06:59:22,241 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 06:59:22,241 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 06:59:22,241 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 06:59:22,242 INFO L87 Difference]: Start difference. First operand 126 states and 149 transitions. Second operand has 3 states, 2 states have (on average 7.0) internal successors, (14), 3 states have internal predecessors, (14), 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) [2022-11-19 06:59:22,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:59:22,320 INFO L93 Difference]: Finished difference Result 125 states and 148 transitions. [2022-11-19 06:59:22,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 06:59:22,321 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 7.0) internal successors, (14), 3 states have internal predecessors, (14), 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 [2022-11-19 06:59:22,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:59:22,324 INFO L225 Difference]: With dead ends: 125 [2022-11-19 06:59:22,324 INFO L226 Difference]: Without dead ends: 125 [2022-11-19 06:59:22,325 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 [2022-11-19 06:59:22,325 INFO L413 NwaCegarLoop]: 53 mSDtfsCounter, 47 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 06:59:22,326 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [52 Valid, 67 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 06:59:22,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2022-11-19 06:59:22,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 125. [2022-11-19 06:59:22,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 81 states have (on average 1.4691358024691359) internal successors, (119), 107 states have internal predecessors, (119), 15 states have call successors, (15), 4 states have call predecessors, (15), 4 states have return successors, (14), 13 states have call predecessors, (14), 14 states have call successors, (14) [2022-11-19 06:59:22,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 148 transitions. [2022-11-19 06:59:22,333 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 148 transitions. Word has length 33 [2022-11-19 06:59:22,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:59:22,333 INFO L495 AbstractCegarLoop]: Abstraction has 125 states and 148 transitions. [2022-11-19 06:59:22,334 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 7.0) internal successors, (14), 3 states have internal predecessors, (14), 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) [2022-11-19 06:59:22,334 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 148 transitions. [2022-11-19 06:59:22,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-11-19 06:59:22,335 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:59:22,335 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 06:59:22,335 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-11-19 06:59:22,335 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2022-11-19 06:59:22,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:59:22,336 INFO L85 PathProgramCache]: Analyzing trace with hash 1795586005, now seen corresponding path program 1 times [2022-11-19 06:59:22,336 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 06:59:22,337 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1659888231] [2022-11-19 06:59:22,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:59:22,337 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 06:59:22,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:59:22,526 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-11-19 06:59:22,527 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 06:59:22,527 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1659888231] [2022-11-19 06:59:22,527 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1659888231] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 06:59:22,527 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 06:59:22,528 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-19 06:59:22,528 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1482706649] [2022-11-19 06:59:22,528 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 06:59:22,529 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 06:59:22,529 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 06:59:22,529 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 06:59:22,529 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 06:59:22,530 INFO L87 Difference]: Start difference. First operand 125 states and 148 transitions. Second operand has 3 states, 2 states have (on average 7.0) internal successors, (14), 3 states have internal predecessors, (14), 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) [2022-11-19 06:59:22,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:59:22,604 INFO L93 Difference]: Finished difference Result 124 states and 147 transitions. [2022-11-19 06:59:22,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 06:59:22,605 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 7.0) internal successors, (14), 3 states have internal predecessors, (14), 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 [2022-11-19 06:59:22,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:59:22,606 INFO L225 Difference]: With dead ends: 124 [2022-11-19 06:59:22,606 INFO L226 Difference]: Without dead ends: 124 [2022-11-19 06:59:22,606 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 [2022-11-19 06:59:22,607 INFO L413 NwaCegarLoop]: 51 mSDtfsCounter, 48 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 06:59:22,607 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [53 Valid, 65 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 06:59:22,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2022-11-19 06:59:22,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 124. [2022-11-19 06:59:22,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 81 states have (on average 1.4567901234567902) internal successors, (118), 106 states have internal predecessors, (118), 15 states have call successors, (15), 4 states have call predecessors, (15), 4 states have return successors, (14), 13 states have call predecessors, (14), 14 states have call successors, (14) [2022-11-19 06:59:22,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 147 transitions. [2022-11-19 06:59:22,613 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 147 transitions. Word has length 33 [2022-11-19 06:59:22,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:59:22,614 INFO L495 AbstractCegarLoop]: Abstraction has 124 states and 147 transitions. [2022-11-19 06:59:22,614 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 7.0) internal successors, (14), 3 states have internal predecessors, (14), 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) [2022-11-19 06:59:22,614 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 147 transitions. [2022-11-19 06:59:22,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-11-19 06:59:22,615 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:59:22,616 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 06:59:22,616 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-11-19 06:59:22,616 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2022-11-19 06:59:22,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:59:22,617 INFO L85 PathProgramCache]: Analyzing trace with hash -171408707, now seen corresponding path program 1 times [2022-11-19 06:59:22,617 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 06:59:22,617 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [946207298] [2022-11-19 06:59:22,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:59:22,618 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 06:59:22,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:59:22,717 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-11-19 06:59:22,718 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 06:59:22,718 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [946207298] [2022-11-19 06:59:22,718 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [946207298] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 06:59:22,718 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 06:59:22,718 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-19 06:59:22,719 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [999403651] [2022-11-19 06:59:22,719 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 06:59:22,719 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 06:59:22,719 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 06:59:22,720 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 06:59:22,720 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 06:59:22,721 INFO L87 Difference]: Start difference. First operand 124 states and 147 transitions. Second operand has 3 states, 2 states have (on average 7.5) internal successors, (15), 3 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) [2022-11-19 06:59:22,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:59:22,793 INFO L93 Difference]: Finished difference Result 123 states and 146 transitions. [2022-11-19 06:59:22,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 06:59:22,794 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 7.5) internal successors, (15), 3 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 34 [2022-11-19 06:59:22,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:59:22,797 INFO L225 Difference]: With dead ends: 123 [2022-11-19 06:59:22,798 INFO L226 Difference]: Without dead ends: 123 [2022-11-19 06:59:22,798 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 [2022-11-19 06:59:22,801 INFO L413 NwaCegarLoop]: 52 mSDtfsCounter, 44 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 06:59:22,802 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [49 Valid, 66 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 06:59:22,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2022-11-19 06:59:22,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 123. [2022-11-19 06:59:22,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 81 states have (on average 1.4444444444444444) internal successors, (117), 105 states have internal predecessors, (117), 15 states have call successors, (15), 4 states have call predecessors, (15), 4 states have return successors, (14), 13 states have call predecessors, (14), 14 states have call successors, (14) [2022-11-19 06:59:22,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 146 transitions. [2022-11-19 06:59:22,816 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 146 transitions. Word has length 34 [2022-11-19 06:59:22,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:59:22,817 INFO L495 AbstractCegarLoop]: Abstraction has 123 states and 146 transitions. [2022-11-19 06:59:22,817 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 7.5) internal successors, (15), 3 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) [2022-11-19 06:59:22,817 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 146 transitions. [2022-11-19 06:59:22,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-11-19 06:59:22,819 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:59:22,819 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 06:59:22,820 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-11-19 06:59:22,820 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2022-11-19 06:59:22,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:59:22,821 INFO L85 PathProgramCache]: Analyzing trace with hash -171408706, now seen corresponding path program 1 times [2022-11-19 06:59:22,821 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 06:59:22,821 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [974608572] [2022-11-19 06:59:22,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:59:22,821 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 06:59:22,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:59:22,962 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-11-19 06:59:22,962 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 06:59:22,963 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [974608572] [2022-11-19 06:59:22,963 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [974608572] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 06:59:22,963 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 06:59:22,963 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-19 06:59:22,963 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [405551881] [2022-11-19 06:59:22,964 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 06:59:22,964 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 06:59:22,964 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 06:59:22,965 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 06:59:22,965 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 06:59:22,965 INFO L87 Difference]: Start difference. First operand 123 states and 146 transitions. Second operand has 3 states, 2 states have (on average 7.5) internal successors, (15), 3 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) [2022-11-19 06:59:23,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:59:23,040 INFO L93 Difference]: Finished difference Result 122 states and 145 transitions. [2022-11-19 06:59:23,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 06:59:23,041 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 7.5) internal successors, (15), 3 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 34 [2022-11-19 06:59:23,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:59:23,042 INFO L225 Difference]: With dead ends: 122 [2022-11-19 06:59:23,042 INFO L226 Difference]: Without dead ends: 122 [2022-11-19 06:59:23,043 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 [2022-11-19 06:59:23,044 INFO L413 NwaCegarLoop]: 50 mSDtfsCounter, 45 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 06:59:23,045 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 64 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 06:59:23,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2022-11-19 06:59:23,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 122. [2022-11-19 06:59:23,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 81 states have (on average 1.4320987654320987) internal successors, (116), 104 states have internal predecessors, (116), 15 states have call successors, (15), 4 states have call predecessors, (15), 4 states have return successors, (14), 13 states have call predecessors, (14), 14 states have call successors, (14) [2022-11-19 06:59:23,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 145 transitions. [2022-11-19 06:59:23,059 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 145 transitions. Word has length 34 [2022-11-19 06:59:23,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:59:23,059 INFO L495 AbstractCegarLoop]: Abstraction has 122 states and 145 transitions. [2022-11-19 06:59:23,060 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 7.5) internal successors, (15), 3 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) [2022-11-19 06:59:23,060 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 145 transitions. [2022-11-19 06:59:23,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-11-19 06:59:23,062 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:59:23,062 INFO L195 NwaCegarLoop]: trace histogram [4, 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] [2022-11-19 06:59:23,063 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-11-19 06:59:23,063 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2022-11-19 06:59:23,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:59:23,064 INFO L85 PathProgramCache]: Analyzing trace with hash 2081921806, now seen corresponding path program 1 times [2022-11-19 06:59:23,064 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 06:59:23,064 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2034799619] [2022-11-19 06:59:23,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:59:23,064 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 06:59:23,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:59:23,472 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-19 06:59:23,472 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 06:59:23,472 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2034799619] [2022-11-19 06:59:23,472 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2034799619] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 06:59:23,472 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 06:59:23,472 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-11-19 06:59:23,473 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1288342575] [2022-11-19 06:59:23,473 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 06:59:23,473 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-19 06:59:23,473 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 06:59:23,474 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-19 06:59:23,474 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2022-11-19 06:59:23,474 INFO L87 Difference]: Start difference. First operand 122 states and 145 transitions. Second operand has 10 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 9 states have internal predecessors, (22), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-19 06:59:24,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:59:24,001 INFO L93 Difference]: Finished difference Result 166 states and 191 transitions. [2022-11-19 06:59:24,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-19 06:59:24,002 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 9 states have internal predecessors, (22), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 36 [2022-11-19 06:59:24,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:59:24,003 INFO L225 Difference]: With dead ends: 166 [2022-11-19 06:59:24,003 INFO L226 Difference]: Without dead ends: 166 [2022-11-19 06:59:24,003 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2022-11-19 06:59:24,004 INFO L413 NwaCegarLoop]: 56 mSDtfsCounter, 162 mSDsluCounter, 297 mSDsCounter, 0 mSdLazyCounter, 361 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 166 SdHoareTripleChecker+Valid, 353 SdHoareTripleChecker+Invalid, 392 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 361 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-19 06:59:24,004 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [166 Valid, 353 Invalid, 392 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 361 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-19 06:59:24,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2022-11-19 06:59:24,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 124. [2022-11-19 06:59:24,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 83 states have (on average 1.4337349397590362) internal successors, (119), 105 states have internal predecessors, (119), 15 states have call successors, (15), 4 states have call predecessors, (15), 4 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2022-11-19 06:59:24,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 148 transitions. [2022-11-19 06:59:24,013 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 148 transitions. Word has length 36 [2022-11-19 06:59:24,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:59:24,014 INFO L495 AbstractCegarLoop]: Abstraction has 124 states and 148 transitions. [2022-11-19 06:59:24,014 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 9 states have internal predecessors, (22), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-19 06:59:24,014 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 148 transitions. [2022-11-19 06:59:24,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-11-19 06:59:24,016 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:59:24,016 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 06:59:24,016 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2022-11-19 06:59:24,016 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2022-11-19 06:59:24,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:59:24,019 INFO L85 PathProgramCache]: Analyzing trace with hash -1015048301, now seen corresponding path program 2 times [2022-11-19 06:59:24,019 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 06:59:24,019 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [388448025] [2022-11-19 06:59:24,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:59:24,020 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 06:59:24,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:59:24,152 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 8 proven. 18 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-19 06:59:24,153 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 06:59:24,153 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [388448025] [2022-11-19 06:59:24,153 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [388448025] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 06:59:24,153 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2089852428] [2022-11-19 06:59:24,154 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-19 06:59:24,154 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 06:59:24,154 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18e0f2b5-4226-4767-8bd2-110427c66437/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 06:59:24,159 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18e0f2b5-4226-4767-8bd2-110427c66437/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 06:59:24,174 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18e0f2b5-4226-4767-8bd2-110427c66437/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-19 06:59:24,295 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-19 06:59:24,295 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 06:59:24,297 INFO L263 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-19 06:59:24,299 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 06:59:24,492 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 18 proven. 5 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-19 06:59:24,492 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 06:59:24,881 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 17 proven. 6 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-19 06:59:24,882 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2089852428] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 06:59:24,882 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1308937189] [2022-11-19 06:59:24,884 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2022-11-19 06:59:24,884 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 06:59:24,884 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 06:59:24,884 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 06:59:24,884 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 06:59:24,960 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:59:24,962 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:59:24,963 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:59:24,964 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 34 [2022-11-19 06:59:24,984 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:59:24,989 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 22 treesize of output 22 [2022-11-19 06:59:25,029 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:59:25,031 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:59:25,057 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-19 06:59:25,057 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-19 06:59:25,127 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:59:25,128 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:59:25,153 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-19 06:59:25,154 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-19 06:59:25,266 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:59:25,268 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:59:25,293 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-19 06:59:25,294 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-19 06:59:25,401 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:59:25,403 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:59:25,428 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-19 06:59:25,428 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-19 06:59:25,557 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:59:25,559 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:59:25,589 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-19 06:59:25,590 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-19 06:59:25,668 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:59:25,670 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:59:25,696 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-19 06:59:25,697 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-19 06:59:25,818 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:59:25,820 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:59:25,821 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 36 treesize of output 32 [2022-11-19 06:59:25,895 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:59:25,896 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:59:25,898 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 43 treesize of output 39 [2022-11-19 06:59:25,942 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:59:25,945 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:59:25,948 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:59:25,951 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:59:25,953 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:59:25,956 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:59:25,959 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:59:25,961 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:59:25,964 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:59:25,967 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:59:25,969 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:59:25,972 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:59:25,974 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:59:25,976 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 18 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 63 [2022-11-19 06:59:27,741 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:59:27,742 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:59:27,765 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-19 06:59:27,766 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-19 06:59:27,814 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:59:27,816 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:59:27,835 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-19 06:59:27,835 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-19 06:59:27,878 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:59:27,879 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:59:27,899 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-19 06:59:27,899 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-19 06:59:27,923 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 59 for LOIs [2022-11-19 06:59:27,935 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 06:59:36,245 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '8006#(and (<= |ULTIMATE.start_mkdup_~a#1.offset| 0) (<= |ULTIMATE.start_main_~n~0#1| 2147483647) (<= (+ (* |ULTIMATE.start_finddup_~i~1#1| 4) |ULTIMATE.start_finddup_~a#1.offset| 4) (select |#length| |ULTIMATE.start_finddup_~a#1.base|)) (<= 0 |ULTIMATE.start_finddup_~_i#1.offset|) (<= 0 |ULTIMATE.start_main_~#i~2#1.base|) (= |ULTIMATE.start_#Ultimate.meminit_#sizeOfFields#1| 4) (<= |ULTIMATE.start_#Ultimate.meminit_#product#1| 8589934588) (<= |ULTIMATE.start_finddup_#in~_i#1.offset| 0) (<= 0 |ULTIMATE.start_main_~a~0#1.offset|) (<= 0 |ULTIMATE.start_finddup_#in~_i#1.offset|) (<= |ULTIMATE.start_mkdup_~j~0#1| 2147483647) (<= 0 |ULTIMATE.start_mkdup_~a#1.offset|) (<= |ULTIMATE.start_mkdup_~i~0#1| 2147483647) (<= |ULTIMATE.start_finddup_~a#1.offset| 0) (<= |ULTIMATE.start_mkdup_~n#1| 2147483647) (not (<= (+ (* |ULTIMATE.start_finddup_~j~1#1| 4) |ULTIMATE.start_finddup_~a#1.offset| 4) (select |#length| |ULTIMATE.start_finddup_~a#1.base|))) (<= |ULTIMATE.start_mkdup_#in~a#1.offset| 0) (<= 0 (+ |ULTIMATE.start_mkdup_~x~0#1| 2147483648)) (<= |ULTIMATE.start_finddup_~_i#1.offset| 0) (<= 1 |ULTIMATE.start_finddup_#in~n#1|) (<= |ULTIMATE.start_#Ultimate.meminit_#amountOfFields#1| 2147483647) (<= 0 |ULTIMATE.start_finddup_~a#1.offset|) (<= 1 |ULTIMATE.start_#Ultimate.meminit_#amountOfFields#1|) (= (select (select |#memory_int| |ULTIMATE.start_finddup_~a#1.base|) (+ (* |ULTIMATE.start_finddup_~i~1#1| 4) |ULTIMATE.start_finddup_~a#1.offset|)) |ULTIMATE.start_finddup_#t~mem10#1|) (<= 0 |ULTIMATE.start_finddup_#in~_j#1.offset|) (<= 0 (+ |ULTIMATE.start_mkdup_~j~0#1| 2147483648)) (<= 0 |ULTIMATE.start_finddup_#in~_i#1.base|) (<= |ULTIMATE.start_mkdup_#in~n#1| 2147483647) (<= 0 |ULTIMATE.start_#Ultimate.meminit_#ptr#1.offset|) (<= 4 |ULTIMATE.start_#Ultimate.meminit_#product#1|) (<= |ULTIMATE.start_mkdup_~x~0#1| 2147483647) (<= 1 |ULTIMATE.start_mkdup_~n#1|) (<= 0 |ULTIMATE.start_finddup_~_i#1.base|) (= |ULTIMATE.start_main_#t~malloc13#1.offset| 0) (<= |ULTIMATE.start_finddup_~n#1| 2147483647) (<= 1 |ULTIMATE.start_main_~n~0#1|) (<= |ULTIMATE.start_finddup_#in~n#1| 2147483647) (<= |ULTIMATE.start_finddup_#in~a#1.offset| 0) (= |ULTIMATE.start_main_~#j~2#1.offset| 0) (<= 0 |ULTIMATE.start_finddup_~_j#1.offset|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_mkdup_#in~a#1.offset|) (<= 0 |ULTIMATE.start_finddup_~_j#1.base|) (<= 0 |ULTIMATE.start_main_~#j~2#1.base|) (<= |ULTIMATE.start_finddup_~_j#1.offset| 0) (= (select |#valid| |ULTIMATE.start_finddup_~a#1.base|) 1) (<= 0 (+ |ULTIMATE.start_mkdup_~i~0#1| 2147483648)) (<= 0 |ULTIMATE.start_finddup_#in~a#1.offset|) (<= 0 |ULTIMATE.start_finddup_#in~_j#1.base|) (<= 1 |ULTIMATE.start_finddup_~n#1|) (<= 1 |ULTIMATE.start_mkdup_#in~n#1|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~a~0#1.offset| 0) (<= |ULTIMATE.start_#Ultimate.meminit_#ptr#1.offset| 0) (<= |ULTIMATE.start_finddup_#in~_j#1.offset| 0) (<= 0 (+ (* |ULTIMATE.start_finddup_~i~1#1| 4) |ULTIMATE.start_finddup_~a#1.offset|)) (= |#NULL.base| 0) (= |ULTIMATE.start_main_~#i~2#1.offset| 0))' at error location [2022-11-19 06:59:36,246 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 06:59:36,246 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 06:59:36,246 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 22 [2022-11-19 06:59:36,246 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1571174713] [2022-11-19 06:59:36,246 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 06:59:36,250 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-11-19 06:59:36,250 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 06:59:36,251 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-11-19 06:59:36,251 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=159, Invalid=1247, Unknown=0, NotChecked=0, Total=1406 [2022-11-19 06:59:36,252 INFO L87 Difference]: Start difference. First operand 124 states and 148 transitions. Second operand has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 22 states have internal predecessors, (51), 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) [2022-11-19 06:59:38,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:59:38,326 INFO L93 Difference]: Finished difference Result 456 states and 527 transitions. [2022-11-19 06:59:38,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-11-19 06:59:38,330 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 22 states have internal predecessors, (51), 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 [2022-11-19 06:59:38,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:59:38,333 INFO L225 Difference]: With dead ends: 456 [2022-11-19 06:59:38,333 INFO L226 Difference]: Without dead ends: 456 [2022-11-19 06:59:38,334 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1239 ImplicationChecksByTransitivity, 9.3s TimeCoverageRelationStatistics Valid=643, Invalid=3647, Unknown=0, NotChecked=0, Total=4290 [2022-11-19 06:59:38,335 INFO L413 NwaCegarLoop]: 185 mSDtfsCounter, 1893 mSDsluCounter, 755 mSDsCounter, 0 mSdLazyCounter, 1229 mSolverCounterSat, 345 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1897 SdHoareTripleChecker+Valid, 940 SdHoareTripleChecker+Invalid, 1574 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 345 IncrementalHoareTripleChecker+Valid, 1229 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-11-19 06:59:38,342 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1897 Valid, 940 Invalid, 1574 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [345 Valid, 1229 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-11-19 06:59:38,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 456 states. [2022-11-19 06:59:38,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 456 to 139. [2022-11-19 06:59:38,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 99 states have (on average 1.4141414141414141) internal successors, (140), 120 states have internal predecessors, (140), 15 states have call successors, (15), 4 states have call predecessors, (15), 4 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2022-11-19 06:59:38,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 169 transitions. [2022-11-19 06:59:38,361 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 169 transitions. Word has length 35 [2022-11-19 06:59:38,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:59:38,361 INFO L495 AbstractCegarLoop]: Abstraction has 139 states and 169 transitions. [2022-11-19 06:59:38,362 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 22 states have internal predecessors, (51), 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) [2022-11-19 06:59:38,362 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 169 transitions. [2022-11-19 06:59:38,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-11-19 06:59:38,362 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:59:38,363 INFO L195 NwaCegarLoop]: trace histogram [4, 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] [2022-11-19 06:59:38,376 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18e0f2b5-4226-4767-8bd2-110427c66437/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-19 06:59:38,570 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18e0f2b5-4226-4767-8bd2-110427c66437/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2022-11-19 06:59:38,570 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2022-11-19 06:59:38,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:59:38,571 INFO L85 PathProgramCache]: Analyzing trace with hash -43186018, now seen corresponding path program 1 times [2022-11-19 06:59:38,571 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 06:59:38,571 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1987438937] [2022-11-19 06:59:38,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:59:38,571 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 06:59:38,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:59:39,179 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-19 06:59:39,179 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 06:59:39,179 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1987438937] [2022-11-19 06:59:39,179 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1987438937] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 06:59:39,179 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [408379602] [2022-11-19 06:59:39,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:59:39,180 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 06:59:39,180 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18e0f2b5-4226-4767-8bd2-110427c66437/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 06:59:39,183 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18e0f2b5-4226-4767-8bd2-110427c66437/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 06:59:39,191 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18e0f2b5-4226-4767-8bd2-110427c66437/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-19 06:59:39,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:59:39,328 INFO L263 TraceCheckSpWp]: Trace formula consists of 251 conjuncts, 45 conjunts are in the unsatisfiable core [2022-11-19 06:59:39,331 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 06:59:39,355 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 10 treesize of output 8 [2022-11-19 06:59:39,555 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-19 06:59:39,602 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-11-19 06:59:39,754 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2022-11-19 06:59:39,811 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-19 06:59:39,811 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 06:59:40,096 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-19 06:59:40,096 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 21 [2022-11-19 06:59:40,110 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-19 06:59:40,111 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 37 [2022-11-19 06:59:40,115 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 [2022-11-19 06:59:40,326 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-19 06:59:40,326 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [408379602] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 06:59:40,327 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1111457592] [2022-11-19 06:59:40,329 INFO L159 IcfgInterpreter]: Started Sifa with 30 locations of interest [2022-11-19 06:59:40,329 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 06:59:40,329 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 06:59:40,330 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 06:59:40,330 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 06:59:40,390 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:59:40,393 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:59:40,394 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:59:40,402 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 34 [2022-11-19 06:59:40,420 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:59:40,421 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 22 treesize of output 22 [2022-11-19 06:59:40,462 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:59:40,464 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:59:40,488 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-19 06:59:40,489 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-19 06:59:40,541 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:59:40,542 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:59:40,562 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-19 06:59:40,563 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-19 06:59:40,668 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:59:40,670 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:59:40,692 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-19 06:59:40,692 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-19 06:59:40,751 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:59:40,753 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:59:40,774 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-19 06:59:40,774 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-19 06:59:40,886 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:59:40,888 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:59:40,909 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-19 06:59:40,909 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-19 06:59:40,993 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:59:40,994 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:59:41,018 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-19 06:59:41,019 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-19 06:59:41,136 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:59:41,137 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:59:41,140 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 36 treesize of output 32 [2022-11-19 06:59:41,238 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:59:41,241 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:59:41,243 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:59:41,245 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:59:41,247 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:59:41,249 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:59:41,252 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:59:41,254 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:59:41,256 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:59:41,259 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:59:41,261 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:59:41,264 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:59:41,266 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:59:41,268 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 18 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 63 [2022-11-19 06:59:41,315 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:59:41,317 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:59:41,318 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 43 treesize of output 39 [2022-11-19 06:59:41,585 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:59:41,587 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:59:41,589 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:59:41,591 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:59:41,594 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 65 treesize of output 62 [2022-11-19 06:59:41,621 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 8 treesize of output 7 [2022-11-19 06:59:41,775 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:59:41,777 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:59:41,780 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:59:41,783 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:59:41,786 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:59:41,788 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:59:41,790 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 57 [2022-11-19 06:59:41,826 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 8 treesize of output 7 [2022-11-19 06:59:42,002 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:59:42,004 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:59:42,006 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:59:42,021 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:59:42,023 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:59:42,027 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:59:42,030 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:59:42,032 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:59:42,036 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:59:42,039 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:59:42,041 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:59:42,043 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:59:42,047 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:59:42,048 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:59:42,050 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:59:42,051 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:59:42,056 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:59:42,127 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-19 06:59:42,127 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 20 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 2 case distinctions, treesize of input 48 treesize of output 46 [2022-11-19 06:59:42,446 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:59:42,449 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:59:42,451 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:59:42,467 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:59:42,472 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:59:42,474 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:59:42,477 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:59:42,479 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:59:42,481 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:59:42,483 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:59:42,486 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:59:42,488 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:59:42,492 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:59:42,495 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:59:42,496 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:59:42,497 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:59:42,500 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:59:42,576 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-19 06:59:42,576 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 20 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 2 case distinctions, treesize of input 48 treesize of output 46 [2022-11-19 06:59:43,152 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:59:43,155 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:59:43,158 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:59:43,171 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:59:43,174 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:59:43,177 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:59:43,180 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:59:43,182 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:59:43,185 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:59:43,187 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:59:43,189 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:59:43,191 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:59:43,196 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:59:43,199 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:59:43,200 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:59:43,201 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:59:43,204 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:59:43,257 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-19 06:59:43,257 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 20 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 2 case distinctions, treesize of input 48 treesize of output 46 [2022-11-19 06:59:43,791 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:59:43,794 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:59:43,800 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:59:43,834 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:59:43,838 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:59:43,840 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:59:43,842 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:59:43,845 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:59:43,847 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:59:43,850 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:59:43,852 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:59:43,854 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:59:43,859 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:59:43,862 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:59:43,863 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:59:43,864 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:59:43,864 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:59:43,922 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-19 06:59:43,922 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 20 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 2 case distinctions, treesize of input 48 treesize of output 46 [2022-11-19 06:59:44,005 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:59:44,007 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:59:44,026 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-19 06:59:44,027 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-19 06:59:44,080 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:59:44,082 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:59:44,106 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-19 06:59:44,106 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-19 06:59:44,149 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:59:44,150 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:59:44,170 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-19 06:59:44,171 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-19 06:59:44,202 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 20 for LOIs [2022-11-19 06:59:44,215 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 59 for LOIs [2022-11-19 06:59:44,231 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 07:00:07,983 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '8928#(and (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-19 07:00:07,983 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 07:00:07,984 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 07:00:07,984 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 13] total 30 [2022-11-19 07:00:07,984 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [752212083] [2022-11-19 07:00:07,984 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 07:00:07,985 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-11-19 07:00:07,985 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:00:07,985 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-11-19 07:00:07,986 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=385, Invalid=2473, Unknown=4, NotChecked=0, Total=2862 [2022-11-19 07:00:07,986 INFO L87 Difference]: Start difference. First operand 139 states and 169 transitions. Second operand has 30 states, 26 states have (on average 1.8846153846153846) internal successors, (49), 28 states have internal predecessors, (49), 5 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2022-11-19 07:00:10,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:00:10,118 INFO L93 Difference]: Finished difference Result 186 states and 217 transitions. [2022-11-19 07:00:10,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-11-19 07:00:10,118 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 26 states have (on average 1.8846153846153846) internal successors, (49), 28 states have internal predecessors, (49), 5 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) Word has length 37 [2022-11-19 07:00:10,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:00:10,120 INFO L225 Difference]: With dead ends: 186 [2022-11-19 07:00:10,120 INFO L226 Difference]: Without dead ends: 186 [2022-11-19 07:00:10,124 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 74 SyntacticMatches, 4 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1845 ImplicationChecksByTransitivity, 25.7s TimeCoverageRelationStatistics Valid=869, Invalid=4677, Unknown=4, NotChecked=0, Total=5550 [2022-11-19 07:00:10,126 INFO L413 NwaCegarLoop]: 51 mSDtfsCounter, 984 mSDsluCounter, 591 mSDsCounter, 0 mSdLazyCounter, 877 mSolverCounterSat, 170 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 984 SdHoareTripleChecker+Valid, 642 SdHoareTripleChecker+Invalid, 1090 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 170 IncrementalHoareTripleChecker+Valid, 877 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 43 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-19 07:00:10,126 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [984 Valid, 642 Invalid, 1090 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [170 Valid, 877 Invalid, 0 Unknown, 43 Unchecked, 0.9s Time] [2022-11-19 07:00:10,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2022-11-19 07:00:10,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 144. [2022-11-19 07:00:10,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144 states, 102 states have (on average 1.4019607843137254) internal successors, (143), 124 states have internal predecessors, (143), 16 states have call successors, (16), 5 states have call predecessors, (16), 5 states have return successors, (15), 14 states have call predecessors, (15), 15 states have call successors, (15) [2022-11-19 07:00:10,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 174 transitions. [2022-11-19 07:00:10,138 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 174 transitions. Word has length 37 [2022-11-19 07:00:10,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:00:10,138 INFO L495 AbstractCegarLoop]: Abstraction has 144 states and 174 transitions. [2022-11-19 07:00:10,138 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 26 states have (on average 1.8846153846153846) internal successors, (49), 28 states have internal predecessors, (49), 5 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2022-11-19 07:00:10,139 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 174 transitions. [2022-11-19 07:00:10,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-11-19 07:00:10,140 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:00:10,140 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:00:10,153 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18e0f2b5-4226-4767-8bd2-110427c66437/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-11-19 07:00:10,353 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18e0f2b5-4226-4767-8bd2-110427c66437/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:00:10,353 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2022-11-19 07:00:10,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:00:10,354 INFO L85 PathProgramCache]: Analyzing trace with hash -986850864, now seen corresponding path program 3 times [2022-11-19 07:00:10,354 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:00:10,354 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [673003786] [2022-11-19 07:00:10,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:00:10,354 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:00:10,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:00:19,587 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 13 proven. 15 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-11-19 07:00:19,588 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:00:19,588 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [673003786] [2022-11-19 07:00:19,588 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [673003786] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:00:19,588 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2045578687] [2022-11-19 07:00:19,588 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-19 07:00:19,588 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:00:19,588 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18e0f2b5-4226-4767-8bd2-110427c66437/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:00:19,589 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18e0f2b5-4226-4767-8bd2-110427c66437/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:00:19,591 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18e0f2b5-4226-4767-8bd2-110427c66437/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-19 07:00:19,711 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-19 07:00:19,711 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 07:00:19,713 INFO L263 TraceCheckSpWp]: Trace formula consists of 260 conjuncts, 60 conjunts are in the unsatisfiable core [2022-11-19 07:00:19,716 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:00:19,727 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2022-11-19 07:00:20,165 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 17 [2022-11-19 07:00:20,252 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 25 treesize of output 20 [2022-11-19 07:00:21,750 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 55 treesize of output 41 [2022-11-19 07:00:21,865 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 18 proven. 16 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-19 07:00:21,866 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:00:25,053 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2045578687] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:00:25,053 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [818259171] [2022-11-19 07:00:25,056 INFO L159 IcfgInterpreter]: Started Sifa with 22 locations of interest [2022-11-19 07:00:25,056 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 07:00:25,056 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 07:00:25,057 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 07:00:25,057 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 07:00:25,118 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:00:25,119 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:00:25,120 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:00:25,121 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 34 [2022-11-19 07:00:25,135 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:00:25,135 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 22 treesize of output 22 [2022-11-19 07:00:25,167 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:00:25,168 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:00:25,186 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-19 07:00:25,186 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-19 07:00:25,235 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:00:25,236 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:00:25,254 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-19 07:00:25,254 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-19 07:00:25,337 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:00:25,338 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:00:25,358 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-19 07:00:25,358 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-19 07:00:25,421 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:00:25,423 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:00:25,447 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-19 07:00:25,448 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-19 07:00:25,604 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:00:25,605 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:00:25,627 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-19 07:00:25,627 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-19 07:00:25,694 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:00:25,695 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:00:25,715 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-19 07:00:25,715 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-19 07:00:25,813 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:00:25,814 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:00:25,818 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 36 treesize of output 32 [2022-11-19 07:00:25,908 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:00:25,910 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:00:25,913 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:00:25,915 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:00:25,917 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:00:25,919 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:00:25,921 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:00:25,924 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:00:25,926 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:00:25,928 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:00:25,931 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:00:25,933 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:00:25,935 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:00:25,937 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 18 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 63 [2022-11-19 07:00:25,974 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:00:25,976 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:00:25,978 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 43 treesize of output 39 [2022-11-19 07:00:27,707 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:00:27,708 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:00:27,730 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-19 07:00:27,730 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-19 07:00:27,790 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:00:27,791 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:00:27,812 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-19 07:00:27,812 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-19 07:00:27,872 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:00:27,873 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:00:27,906 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-19 07:00:27,907 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-19 07:00:27,936 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 10 for LOIs [2022-11-19 07:00:27,940 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 59 for LOIs [2022-11-19 07:00:27,955 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 07:00:37,940 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '9574#(and (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-19 07:00:37,941 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 07:00:37,941 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-19 07:00:37,941 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17] total 30 [2022-11-19 07:00:37,941 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [258359477] [2022-11-19 07:00:37,941 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-19 07:00:37,942 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-11-19 07:00:37,942 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:00:37,943 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-11-19 07:00:37,943 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=321, Invalid=3100, Unknown=1, NotChecked=0, Total=3422 [2022-11-19 07:00:37,943 INFO L87 Difference]: Start difference. First operand 144 states and 174 transitions. Second operand has 30 states, 30 states have (on average 1.5666666666666667) internal successors, (47), 30 states have internal predecessors, (47), 4 states have call successors, (8), 3 states have call predecessors, (8), 2 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2022-11-19 07:00:40,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:00:40,184 INFO L93 Difference]: Finished difference Result 125 states and 143 transitions. [2022-11-19 07:00:40,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-11-19 07:00:40,185 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.5666666666666667) internal successors, (47), 30 states have internal predecessors, (47), 4 states have call successors, (8), 3 states have call predecessors, (8), 2 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) Word has length 41 [2022-11-19 07:00:40,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:00:40,186 INFO L225 Difference]: With dead ends: 125 [2022-11-19 07:00:40,186 INFO L226 Difference]: Without dead ends: 125 [2022-11-19 07:00:40,187 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 63 SyntacticMatches, 7 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1229 ImplicationChecksByTransitivity, 18.8s TimeCoverageRelationStatistics Valid=352, Invalid=3429, Unknown=1, NotChecked=0, Total=3782 [2022-11-19 07:00:40,188 INFO L413 NwaCegarLoop]: 61 mSDtfsCounter, 12 mSDsluCounter, 760 mSDsCounter, 0 mSdLazyCounter, 256 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 821 SdHoareTripleChecker+Invalid, 351 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 256 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 94 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-19 07:00:40,188 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 821 Invalid, 351 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 256 Invalid, 0 Unknown, 94 Unchecked, 0.6s Time] [2022-11-19 07:00:40,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2022-11-19 07:00:40,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 114. [2022-11-19 07:00:40,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 73 states have (on average 1.3835616438356164) internal successors, (101), 95 states have internal predecessors, (101), 15 states have call successors, (15), 5 states have call predecessors, (15), 5 states have return successors, (14), 13 states have call predecessors, (14), 14 states have call successors, (14) [2022-11-19 07:00:40,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 130 transitions. [2022-11-19 07:00:40,194 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 130 transitions. Word has length 41 [2022-11-19 07:00:40,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:00:40,194 INFO L495 AbstractCegarLoop]: Abstraction has 114 states and 130 transitions. [2022-11-19 07:00:40,195 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.5666666666666667) internal successors, (47), 30 states have internal predecessors, (47), 4 states have call successors, (8), 3 states have call predecessors, (8), 2 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2022-11-19 07:00:40,195 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 130 transitions. [2022-11-19 07:00:40,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-11-19 07:00:40,196 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:00:40,196 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 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] [2022-11-19 07:00:40,210 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18e0f2b5-4226-4767-8bd2-110427c66437/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-11-19 07:00:40,407 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18e0f2b5-4226-4767-8bd2-110427c66437/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:00:40,407 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2022-11-19 07:00:40,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:00:40,408 INFO L85 PathProgramCache]: Analyzing trace with hash -2016286436, now seen corresponding path program 1 times [2022-11-19 07:00:40,408 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:00:40,408 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [834561257] [2022-11-19 07:00:40,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:00:40,408 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:00:40,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:00:40,490 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-11-19 07:00:40,490 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:00:40,491 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [834561257] [2022-11-19 07:00:40,491 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [834561257] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:00:40,491 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:00:40,491 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 07:00:40,491 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [236296706] [2022-11-19 07:00:40,492 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:00:40,492 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-19 07:00:40,492 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:00:40,493 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-19 07:00:40,493 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-19 07:00:40,493 INFO L87 Difference]: Start difference. First operand 114 states and 130 transitions. Second operand has 4 states, 3 states have (on average 6.666666666666667) internal successors, (20), 4 states have internal predecessors, (20), 2 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-19 07:00:40,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:00:40,585 INFO L93 Difference]: Finished difference Result 110 states and 126 transitions. [2022-11-19 07:00:40,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:00:40,586 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 6.666666666666667) internal successors, (20), 4 states have internal predecessors, (20), 2 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 41 [2022-11-19 07:00:40,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:00:40,587 INFO L225 Difference]: With dead ends: 110 [2022-11-19 07:00:40,587 INFO L226 Difference]: Without dead ends: 110 [2022-11-19 07:00:40,587 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-19 07:00:40,588 INFO L413 NwaCegarLoop]: 47 mSDtfsCounter, 80 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 07:00:40,588 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [80 Valid, 82 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 07:00:40,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2022-11-19 07:00:40,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 110. [2022-11-19 07:00:40,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 73 states have (on average 1.3287671232876712) internal successors, (97), 91 states have internal predecessors, (97), 15 states have call successors, (15), 5 states have call predecessors, (15), 5 states have return successors, (14), 13 states have call predecessors, (14), 14 states have call successors, (14) [2022-11-19 07:00:40,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 126 transitions. [2022-11-19 07:00:40,592 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 126 transitions. Word has length 41 [2022-11-19 07:00:40,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:00:40,592 INFO L495 AbstractCegarLoop]: Abstraction has 110 states and 126 transitions. [2022-11-19 07:00:40,593 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 6.666666666666667) internal successors, (20), 4 states have internal predecessors, (20), 2 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-19 07:00:40,593 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 126 transitions. [2022-11-19 07:00:40,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-11-19 07:00:40,593 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:00:40,593 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 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] [2022-11-19 07:00:40,593 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2022-11-19 07:00:40,594 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2022-11-19 07:00:40,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:00:40,594 INFO L85 PathProgramCache]: Analyzing trace with hash -2016286435, now seen corresponding path program 1 times [2022-11-19 07:00:40,594 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:00:40,594 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1188046332] [2022-11-19 07:00:40,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:00:40,595 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:00:40,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:00:40,778 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-11-19 07:00:40,778 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:00:40,778 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1188046332] [2022-11-19 07:00:40,778 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1188046332] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:00:40,779 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:00:40,779 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 07:00:40,779 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1642348212] [2022-11-19 07:00:40,779 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:00:40,780 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-19 07:00:40,780 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:00:40,781 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-19 07:00:40,781 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-19 07:00:40,782 INFO L87 Difference]: Start difference. First operand 110 states and 126 transitions. Second operand has 4 states, 3 states have (on average 6.666666666666667) internal successors, (20), 4 states have internal predecessors, (20), 2 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-19 07:00:40,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:00:40,882 INFO L93 Difference]: Finished difference Result 106 states and 122 transitions. [2022-11-19 07:00:40,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:00:40,882 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 6.666666666666667) internal successors, (20), 4 states have internal predecessors, (20), 2 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 41 [2022-11-19 07:00:40,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:00:40,883 INFO L225 Difference]: With dead ends: 106 [2022-11-19 07:00:40,883 INFO L226 Difference]: Without dead ends: 106 [2022-11-19 07:00:40,883 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-19 07:00:40,884 INFO L413 NwaCegarLoop]: 45 mSDtfsCounter, 72 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 75 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 07:00:40,884 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [72 Valid, 75 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 07:00:40,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2022-11-19 07:00:40,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 106. [2022-11-19 07:00:40,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 73 states have (on average 1.273972602739726) internal successors, (93), 87 states have internal predecessors, (93), 15 states have call successors, (15), 5 states have call predecessors, (15), 5 states have return successors, (14), 13 states have call predecessors, (14), 14 states have call successors, (14) [2022-11-19 07:00:40,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 122 transitions. [2022-11-19 07:00:40,887 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 122 transitions. Word has length 41 [2022-11-19 07:00:40,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:00:40,887 INFO L495 AbstractCegarLoop]: Abstraction has 106 states and 122 transitions. [2022-11-19 07:00:40,888 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 6.666666666666667) internal successors, (20), 4 states have internal predecessors, (20), 2 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-19 07:00:40,888 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 122 transitions. [2022-11-19 07:00:40,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-11-19 07:00:40,888 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:00:40,888 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 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] [2022-11-19 07:00:40,888 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2022-11-19 07:00:40,888 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2022-11-19 07:00:40,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:00:40,889 INFO L85 PathProgramCache]: Analyzing trace with hash 12704851, now seen corresponding path program 1 times [2022-11-19 07:00:40,889 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:00:40,889 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1305639838] [2022-11-19 07:00:40,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:00:40,889 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:00:40,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:00:41,098 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-19 07:00:41,098 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:00:41,098 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1305639838] [2022-11-19 07:00:41,099 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1305639838] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:00:41,099 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:00:41,099 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-19 07:00:41,099 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [208317352] [2022-11-19 07:00:41,099 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:00:41,100 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-19 07:00:41,100 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:00:41,100 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-19 07:00:41,100 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-19 07:00:41,101 INFO L87 Difference]: Start difference. First operand 106 states and 122 transitions. Second operand has 7 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 3 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-11-19 07:00:41,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:00:41,330 INFO L93 Difference]: Finished difference Result 108 states and 121 transitions. [2022-11-19 07:00:41,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-19 07:00:41,330 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 3 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 45 [2022-11-19 07:00:41,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:00:41,331 INFO L225 Difference]: With dead ends: 108 [2022-11-19 07:00:41,332 INFO L226 Difference]: Without dead ends: 108 [2022-11-19 07:00:41,332 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2022-11-19 07:00:41,332 INFO L413 NwaCegarLoop]: 54 mSDtfsCounter, 46 mSDsluCounter, 224 mSDsCounter, 0 mSdLazyCounter, 157 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 278 SdHoareTripleChecker+Invalid, 166 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 157 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-19 07:00:41,332 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 278 Invalid, 166 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 157 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-19 07:00:41,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2022-11-19 07:00:41,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 106. [2022-11-19 07:00:41,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 73 states have (on average 1.2602739726027397) internal successors, (92), 87 states have internal predecessors, (92), 15 states have call successors, (15), 5 states have call predecessors, (15), 5 states have return successors, (14), 13 states have call predecessors, (14), 14 states have call successors, (14) [2022-11-19 07:00:41,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 121 transitions. [2022-11-19 07:00:41,339 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 121 transitions. Word has length 45 [2022-11-19 07:00:41,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:00:41,342 INFO L495 AbstractCegarLoop]: Abstraction has 106 states and 121 transitions. [2022-11-19 07:00:41,342 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 3 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-11-19 07:00:41,342 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 121 transitions. [2022-11-19 07:00:41,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-11-19 07:00:41,343 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:00:41,343 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 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] [2022-11-19 07:00:41,343 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2022-11-19 07:00:41,344 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2022-11-19 07:00:41,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:00:41,344 INFO L85 PathProgramCache]: Analyzing trace with hash 231963315, now seen corresponding path program 1 times [2022-11-19 07:00:41,344 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:00:41,344 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [952968718] [2022-11-19 07:00:41,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:00:41,345 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:00:41,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:00:41,659 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-19 07:00:41,659 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:00:41,659 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [952968718] [2022-11-19 07:00:41,659 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [952968718] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:00:41,659 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:00:41,659 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-19 07:00:41,660 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2144214299] [2022-11-19 07:00:41,660 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:00:41,662 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-19 07:00:41,662 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:00:41,662 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-19 07:00:41,662 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-11-19 07:00:41,663 INFO L87 Difference]: Start difference. First operand 106 states and 121 transitions. Second operand has 8 states, 7 states have (on average 3.857142857142857) internal successors, (27), 7 states have internal predecessors, (27), 3 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-11-19 07:00:41,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:00:41,926 INFO L93 Difference]: Finished difference Result 112 states and 127 transitions. [2022-11-19 07:00:41,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-19 07:00:41,927 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.857142857142857) internal successors, (27), 7 states have internal predecessors, (27), 3 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 46 [2022-11-19 07:00:41,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:00:41,928 INFO L225 Difference]: With dead ends: 112 [2022-11-19 07:00:41,928 INFO L226 Difference]: Without dead ends: 112 [2022-11-19 07:00:41,928 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2022-11-19 07:00:41,929 INFO L413 NwaCegarLoop]: 44 mSDtfsCounter, 107 mSDsluCounter, 171 mSDsCounter, 0 mSdLazyCounter, 173 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 215 SdHoareTripleChecker+Invalid, 192 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 173 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-19 07:00:41,929 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [107 Valid, 215 Invalid, 192 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 173 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-19 07:00:41,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2022-11-19 07:00:41,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 111. [2022-11-19 07:00:41,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 76 states have (on average 1.25) internal successors, (95), 91 states have internal predecessors, (95), 16 states have call successors, (16), 6 states have call predecessors, (16), 6 states have return successors, (15), 13 states have call predecessors, (15), 15 states have call successors, (15) [2022-11-19 07:00:41,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 126 transitions. [2022-11-19 07:00:41,933 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 126 transitions. Word has length 46 [2022-11-19 07:00:41,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:00:41,934 INFO L495 AbstractCegarLoop]: Abstraction has 111 states and 126 transitions. [2022-11-19 07:00:41,934 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 3.857142857142857) internal successors, (27), 7 states have internal predecessors, (27), 3 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-11-19 07:00:41,934 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 126 transitions. [2022-11-19 07:00:41,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-11-19 07:00:41,935 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:00:41,935 INFO L195 NwaCegarLoop]: trace histogram [4, 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, 1, 1, 1, 1, 1, 1] [2022-11-19 07:00:41,935 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2022-11-19 07:00:41,935 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2022-11-19 07:00:41,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:00:41,936 INFO L85 PathProgramCache]: Analyzing trace with hash 778226521, now seen corresponding path program 1 times [2022-11-19 07:00:41,936 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:00:41,936 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1362071024] [2022-11-19 07:00:41,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:00:41,936 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:00:41,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:00:42,363 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-19 07:00:42,363 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:00:42,363 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1362071024] [2022-11-19 07:00:42,363 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1362071024] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:00:42,363 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [42294464] [2022-11-19 07:00:42,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:00:42,364 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:00:42,364 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18e0f2b5-4226-4767-8bd2-110427c66437/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:00:42,377 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18e0f2b5-4226-4767-8bd2-110427c66437/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:00:42,386 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18e0f2b5-4226-4767-8bd2-110427c66437/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-11-19 07:00:42,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:00:42,522 INFO L263 TraceCheckSpWp]: Trace formula consists of 282 conjuncts, 29 conjunts are in the unsatisfiable core [2022-11-19 07:00:42,525 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:00:42,546 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 10 treesize of output 8 [2022-11-19 07:00:42,777 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-19 07:00:42,808 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-19 07:00:42,904 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-19 07:00:42,908 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-19 07:00:42,909 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:00:42,909 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [42294464] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:00:42,909 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-19 07:00:42,910 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [11] total 16 [2022-11-19 07:00:42,910 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1442408065] [2022-11-19 07:00:42,910 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:00:42,910 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-19 07:00:42,911 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:00:42,911 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-19 07:00:42,911 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2022-11-19 07:00:42,912 INFO L87 Difference]: Start difference. First operand 111 states and 126 transitions. Second operand has 8 states, 8 states have (on average 3.5) internal successors, (28), 8 states have internal predecessors, (28), 3 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-19 07:00:43,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:00:43,126 INFO L93 Difference]: Finished difference Result 116 states and 126 transitions. [2022-11-19 07:00:43,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-19 07:00:43,127 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.5) internal successors, (28), 8 states have internal predecessors, (28), 3 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 46 [2022-11-19 07:00:43,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:00:43,128 INFO L225 Difference]: With dead ends: 116 [2022-11-19 07:00:43,128 INFO L226 Difference]: Without dead ends: 116 [2022-11-19 07:00:43,128 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 42 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=70, Invalid=272, Unknown=0, NotChecked=0, Total=342 [2022-11-19 07:00:43,129 INFO L413 NwaCegarLoop]: 67 mSDtfsCounter, 32 mSDsluCounter, 237 mSDsCounter, 0 mSdLazyCounter, 112 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 304 SdHoareTripleChecker+Invalid, 152 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 112 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 37 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 07:00:43,129 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 304 Invalid, 152 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 112 Invalid, 0 Unknown, 37 Unchecked, 0.1s Time] [2022-11-19 07:00:43,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2022-11-19 07:00:43,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 114. [2022-11-19 07:00:43,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 79 states have (on average 1.2278481012658229) internal successors, (97), 93 states have internal predecessors, (97), 15 states have call successors, (15), 7 states have call predecessors, (15), 7 states have return successors, (14), 13 states have call predecessors, (14), 14 states have call successors, (14) [2022-11-19 07:00:43,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 126 transitions. [2022-11-19 07:00:43,134 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 126 transitions. Word has length 46 [2022-11-19 07:00:43,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:00:43,135 INFO L495 AbstractCegarLoop]: Abstraction has 114 states and 126 transitions. [2022-11-19 07:00:43,135 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.5) internal successors, (28), 8 states have internal predecessors, (28), 3 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-19 07:00:43,135 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 126 transitions. [2022-11-19 07:00:43,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-11-19 07:00:43,136 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:00:43,136 INFO L195 NwaCegarLoop]: trace histogram [4, 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] [2022-11-19 07:00:43,144 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18e0f2b5-4226-4767-8bd2-110427c66437/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2022-11-19 07:00:43,343 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18e0f2b5-4226-4767-8bd2-110427c66437/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-11-19 07:00:43,343 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr16REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2022-11-19 07:00:43,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:00:43,343 INFO L85 PathProgramCache]: Analyzing trace with hash -1326522291, now seen corresponding path program 1 times [2022-11-19 07:00:43,344 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:00:43,344 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [568647204] [2022-11-19 07:00:43,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:00:43,344 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:00:43,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:00:43,452 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-11-19 07:00:43,453 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:00:43,453 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [568647204] [2022-11-19 07:00:43,454 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [568647204] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:00:43,454 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:00:43,454 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 07:00:43,454 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1300444181] [2022-11-19 07:00:43,455 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:00:43,456 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-19 07:00:43,456 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:00:43,456 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-19 07:00:43,457 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-19 07:00:43,457 INFO L87 Difference]: Start difference. First operand 114 states and 126 transitions. Second operand has 4 states, 3 states have (on average 8.0) internal successors, (24), 4 states have internal predecessors, (24), 2 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-11-19 07:00:43,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:00:43,549 INFO L93 Difference]: Finished difference Result 110 states and 122 transitions. [2022-11-19 07:00:43,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:00:43,549 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 8.0) internal successors, (24), 4 states have internal predecessors, (24), 2 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 50 [2022-11-19 07:00:43,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:00:43,551 INFO L225 Difference]: With dead ends: 110 [2022-11-19 07:00:43,551 INFO L226 Difference]: Without dead ends: 110 [2022-11-19 07:00:43,551 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-19 07:00:43,553 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 58 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 77 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 07:00:43,553 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [58 Valid, 77 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 07:00:43,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2022-11-19 07:00:43,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 110. [2022-11-19 07:00:43,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 79 states have (on average 1.1772151898734178) internal successors, (93), 89 states have internal predecessors, (93), 15 states have call successors, (15), 7 states have call predecessors, (15), 7 states have return successors, (14), 13 states have call predecessors, (14), 14 states have call successors, (14) [2022-11-19 07:00:43,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 122 transitions. [2022-11-19 07:00:43,559 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 122 transitions. Word has length 50 [2022-11-19 07:00:43,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:00:43,560 INFO L495 AbstractCegarLoop]: Abstraction has 110 states and 122 transitions. [2022-11-19 07:00:43,560 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 8.0) internal successors, (24), 4 states have internal predecessors, (24), 2 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-11-19 07:00:43,560 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 122 transitions. [2022-11-19 07:00:43,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-11-19 07:00:43,561 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:00:43,561 INFO L195 NwaCegarLoop]: trace histogram [4, 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] [2022-11-19 07:00:43,561 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2022-11-19 07:00:43,562 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr17REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2022-11-19 07:00:43,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:00:43,562 INFO L85 PathProgramCache]: Analyzing trace with hash -1326522290, now seen corresponding path program 1 times [2022-11-19 07:00:43,562 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:00:43,563 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [287359010] [2022-11-19 07:00:43,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:00:43,563 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:00:43,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:00:43,759 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-11-19 07:00:43,759 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:00:43,759 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [287359010] [2022-11-19 07:00:43,760 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [287359010] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:00:43,760 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:00:43,760 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 07:00:43,760 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2057172840] [2022-11-19 07:00:43,760 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:00:43,761 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-19 07:00:43,761 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:00:43,761 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-19 07:00:43,762 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-19 07:00:43,762 INFO L87 Difference]: Start difference. First operand 110 states and 122 transitions. Second operand has 4 states, 3 states have (on average 8.0) internal successors, (24), 4 states have internal predecessors, (24), 2 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-11-19 07:00:43,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:00:43,836 INFO L93 Difference]: Finished difference Result 106 states and 118 transitions. [2022-11-19 07:00:43,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:00:43,836 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 8.0) internal successors, (24), 4 states have internal predecessors, (24), 2 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 50 [2022-11-19 07:00:43,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:00:43,837 INFO L225 Difference]: With dead ends: 106 [2022-11-19 07:00:43,837 INFO L226 Difference]: Without dead ends: 106 [2022-11-19 07:00:43,838 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-19 07:00:43,838 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 50 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 07:00:43,838 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [55 Valid, 55 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 07:00:43,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2022-11-19 07:00:43,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 106. [2022-11-19 07:00:43,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 79 states have (on average 1.1265822784810127) internal successors, (89), 85 states have internal predecessors, (89), 15 states have call successors, (15), 7 states have call predecessors, (15), 7 states have return successors, (14), 13 states have call predecessors, (14), 14 states have call successors, (14) [2022-11-19 07:00:43,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 118 transitions. [2022-11-19 07:00:43,842 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 118 transitions. Word has length 50 [2022-11-19 07:00:43,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:00:43,843 INFO L495 AbstractCegarLoop]: Abstraction has 106 states and 118 transitions. [2022-11-19 07:00:43,843 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 8.0) internal successors, (24), 4 states have internal predecessors, (24), 2 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-11-19 07:00:43,843 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 118 transitions. [2022-11-19 07:00:43,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-11-19 07:00:43,843 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:00:43,844 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:00:43,844 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2022-11-19 07:00:43,844 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2022-11-19 07:00:43,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:00:43,844 INFO L85 PathProgramCache]: Analyzing trace with hash -1761697376, now seen corresponding path program 1 times [2022-11-19 07:00:43,844 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:00:43,845 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [594315607] [2022-11-19 07:00:43,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:00:43,845 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:00:43,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:00:44,521 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-19 07:00:44,522 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:00:44,522 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [594315607] [2022-11-19 07:00:44,522 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [594315607] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:00:44,522 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [617068773] [2022-11-19 07:00:44,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:00:44,522 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:00:44,522 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18e0f2b5-4226-4767-8bd2-110427c66437/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:00:44,531 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18e0f2b5-4226-4767-8bd2-110427c66437/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:00:44,543 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18e0f2b5-4226-4767-8bd2-110427c66437/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-11-19 07:00:44,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:00:44,702 INFO L263 TraceCheckSpWp]: Trace formula consists of 298 conjuncts, 61 conjunts are in the unsatisfiable core [2022-11-19 07:00:44,705 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:00:44,731 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 10 treesize of output 8 [2022-11-19 07:00:44,995 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-19 07:00:45,055 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2022-11-19 07:00:45,717 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-19 07:00:45,718 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 29 treesize of output 17 [2022-11-19 07:00:45,815 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-19 07:00:45,815 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:00:46,085 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-19 07:00:46,086 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 706 treesize of output 654 [2022-11-19 07:00:47,175 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-19 07:00:47,175 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [617068773] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:00:47,175 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1481365094] [2022-11-19 07:00:47,177 INFO L159 IcfgInterpreter]: Started Sifa with 39 locations of interest [2022-11-19 07:00:47,178 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 07:00:47,178 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 07:00:47,178 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 07:00:47,179 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 07:00:47,251 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:00:47,253 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:00:47,254 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:00:47,255 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 34 [2022-11-19 07:00:47,274 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:00:47,275 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 22 [2022-11-19 07:00:47,308 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:00:47,309 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:00:47,330 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-19 07:00:47,330 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-19 07:00:47,373 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:00:47,374 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:00:47,393 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-19 07:00:47,393 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-19 07:00:47,500 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:00:47,501 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:00:47,523 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-19 07:00:47,524 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-19 07:00:47,578 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:00:47,579 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:00:47,603 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-19 07:00:47,604 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-19 07:00:47,731 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:00:47,732 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:00:47,755 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-19 07:00:47,756 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-19 07:00:47,831 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:00:47,832 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:00:47,857 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-19 07:00:47,857 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-19 07:00:47,993 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:00:47,994 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:00:47,995 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 36 treesize of output 32 [2022-11-19 07:00:48,067 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:00:48,069 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:00:48,071 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:00:48,072 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:00:48,074 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:00:48,075 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:00:48,077 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:00:48,079 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:00:48,081 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:00:48,082 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:00:48,084 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:00:48,085 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:00:48,087 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:00:48,088 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 18 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 63 [2022-11-19 07:00:48,126 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:00:48,127 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:00:48,128 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 43 treesize of output 39 [2022-11-19 07:00:48,345 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:00:48,346 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:00:48,348 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:00:48,350 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:00:48,351 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 65 treesize of output 62 [2022-11-19 07:00:48,386 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 8 treesize of output 7 [2022-11-19 07:00:48,525 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:00:48,527 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:00:48,528 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:00:48,529 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:00:48,531 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:00:48,532 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:00:48,533 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 72 treesize of output 72 [2022-11-19 07:00:48,558 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 8 treesize of output 7 [2022-11-19 07:00:48,732 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:00:48,734 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:00:48,736 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:00:48,749 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:00:48,755 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:00:48,757 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:00:48,760 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:00:48,762 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:00:48,764 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:00:48,767 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:00:48,769 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:00:48,771 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:00:48,773 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:00:48,775 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:00:48,776 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:00:48,780 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:00:48,783 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:00:48,833 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-19 07:00:48,834 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 20 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 2 case distinctions, treesize of input 48 treesize of output 46 [2022-11-19 07:00:49,031 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:00:49,033 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:00:49,035 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:00:49,049 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:00:49,050 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:00:49,054 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:00:49,055 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:00:49,056 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:00:49,057 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:00:49,059 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:00:49,060 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:00:49,062 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:00:49,063 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:00:49,065 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:00:49,065 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:00:49,069 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:00:49,069 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:00:49,112 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-19 07:00:49,112 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 20 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 2 case distinctions, treesize of input 48 treesize of output 46 [2022-11-19 07:00:49,767 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:00:49,769 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:00:49,770 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:00:49,782 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:00:49,783 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:00:49,786 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:00:49,788 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:00:49,791 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:00:49,793 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:00:49,794 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:00:49,797 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:00:49,799 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:00:49,801 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:00:49,803 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:00:49,804 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:00:49,804 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:00:49,808 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:00:49,851 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-19 07:00:49,851 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 20 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 2 case distinctions, treesize of input 48 treesize of output 46 [2022-11-19 07:00:50,418 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:00:50,419 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:00:50,420 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:00:50,431 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:00:50,433 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:00:50,434 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:00:50,435 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:00:50,436 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:00:50,438 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:00:50,439 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:00:50,440 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:00:50,441 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:00:50,446 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:00:50,448 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:00:50,448 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:00:50,449 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:00:50,454 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:00:50,511 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-19 07:00:50,511 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 20 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 2 case distinctions, treesize of input 48 treesize of output 46 [2022-11-19 07:00:52,099 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:00:52,101 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:00:52,104 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:00:52,119 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:00:52,121 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:00:52,123 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:00:52,124 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:00:52,126 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:00:52,127 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:00:52,129 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:00:52,130 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:00:52,132 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:00:52,138 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:00:52,140 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:00:52,141 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:00:52,141 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:00:52,145 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:00:52,221 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-19 07:00:52,222 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 20 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 2 case distinctions, treesize of input 48 treesize of output 46 [2022-11-19 07:00:52,534 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:00:52,537 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:00:52,539 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:00:52,552 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:00:52,554 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:00:52,555 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:00:52,557 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:00:52,561 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:00:52,564 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:00:52,566 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:00:52,568 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:00:52,571 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:00:52,574 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:00:52,578 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:00:52,579 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:00:52,580 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:00:52,584 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:00:52,638 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-19 07:00:52,638 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 20 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 2 case distinctions, treesize of input 48 treesize of output 46 [2022-11-19 07:00:54,273 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:00:54,275 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:00:54,276 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:00:54,306 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:00:54,309 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:00:54,312 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:00:54,314 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:00:54,317 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:00:54,319 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:00:54,326 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:00:54,329 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:00:54,333 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:00:54,336 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:00:54,338 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:00:54,339 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:00:54,340 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:00:54,344 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:00:54,413 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-19 07:00:54,413 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 20 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 2 case distinctions, treesize of input 48 treesize of output 46 [2022-11-19 07:00:54,677 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:00:54,679 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:00:54,682 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:00:54,695 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:00:54,697 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:00:54,699 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:00:54,700 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:00:54,703 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:00:54,705 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:00:54,708 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:00:54,710 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:00:54,712 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:00:54,717 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:00:54,719 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:00:54,720 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:00:54,723 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:00:54,728 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:00:54,780 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-19 07:00:54,781 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 20 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 2 case distinctions, treesize of input 48 treesize of output 46 [2022-11-19 07:00:55,503 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:00:55,505 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:00:55,507 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:00:55,520 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:00:55,525 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:00:55,526 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:00:55,528 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:00:55,534 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:00:55,536 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:00:55,538 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:00:55,539 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:00:55,545 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:00:55,547 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:00:55,549 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:00:55,550 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:00:55,550 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:00:55,557 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:00:55,592 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-19 07:00:55,593 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 20 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 2 case distinctions, treesize of input 48 treesize of output 46 [2022-11-19 07:00:55,745 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:00:55,746 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:00:55,748 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:00:55,761 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:00:55,763 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:00:55,765 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:00:55,767 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:00:55,769 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:00:55,771 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:00:55,774 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:00:55,776 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:00:55,778 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:00:55,780 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:00:55,782 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:00:55,783 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:00:55,789 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:00:55,794 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:00:55,851 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-19 07:00:55,851 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 20 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 2 case distinctions, treesize of input 48 treesize of output 46 [2022-11-19 07:00:55,931 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:00:55,933 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:00:55,953 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-19 07:00:55,953 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-19 07:00:55,996 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:00:55,997 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:00:56,018 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-19 07:00:56,018 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-19 07:00:56,077 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:00:56,078 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:00:56,099 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-19 07:00:56,099 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-19 07:00:56,126 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 18 for LOIs [2022-11-19 07:00:56,135 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 59 for LOIs [2022-11-19 07:00:56,149 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 07:01:34,342 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '11926#(and (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-19 07:01:34,342 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 07:01:34,343 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 07:01:34,343 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15, 13] total 32 [2022-11-19 07:01:34,343 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1442976509] [2022-11-19 07:01:34,343 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 07:01:34,343 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-11-19 07:01:34,344 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:01:34,344 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-11-19 07:01:34,345 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=461, Invalid=2961, Unknown=0, NotChecked=0, Total=3422 [2022-11-19 07:01:34,345 INFO L87 Difference]: Start difference. First operand 106 states and 118 transitions. Second operand has 32 states, 27 states have (on average 2.6296296296296298) internal successors, (71), 31 states have internal predecessors, (71), 8 states have call successors, (13), 4 states have call predecessors, (13), 4 states have return successors, (11), 3 states have call predecessors, (11), 6 states have call successors, (11) [2022-11-19 07:01:36,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:01:36,224 INFO L93 Difference]: Finished difference Result 175 states and 191 transitions. [2022-11-19 07:01:36,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-11-19 07:01:36,225 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 27 states have (on average 2.6296296296296298) internal successors, (71), 31 states have internal predecessors, (71), 8 states have call successors, (13), 4 states have call predecessors, (13), 4 states have return successors, (11), 3 states have call predecessors, (11), 6 states have call successors, (11) Word has length 54 [2022-11-19 07:01:36,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:01:36,226 INFO L225 Difference]: With dead ends: 175 [2022-11-19 07:01:36,226 INFO L226 Difference]: Without dead ends: 175 [2022-11-19 07:01:36,228 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 190 GetRequests, 102 SyntacticMatches, 15 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2253 ImplicationChecksByTransitivity, 40.3s TimeCoverageRelationStatistics Valid=765, Invalid=4785, Unknown=0, NotChecked=0, Total=5550 [2022-11-19 07:01:36,230 INFO L413 NwaCegarLoop]: 46 mSDtfsCounter, 418 mSDsluCounter, 659 mSDsCounter, 0 mSdLazyCounter, 843 mSolverCounterSat, 89 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 423 SdHoareTripleChecker+Valid, 705 SdHoareTripleChecker+Invalid, 1066 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 89 IncrementalHoareTripleChecker+Valid, 843 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 134 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-19 07:01:36,230 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [423 Valid, 705 Invalid, 1066 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [89 Valid, 843 Invalid, 0 Unknown, 134 Unchecked, 0.8s Time] [2022-11-19 07:01:36,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2022-11-19 07:01:36,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 153. [2022-11-19 07:01:36,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153 states, 116 states have (on average 1.0948275862068966) internal successors, (127), 123 states have internal predecessors, (127), 22 states have call successors, (22), 11 states have call predecessors, (22), 10 states have return successors, (21), 18 states have call predecessors, (21), 21 states have call successors, (21) [2022-11-19 07:01:36,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 170 transitions. [2022-11-19 07:01:36,240 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 170 transitions. Word has length 54 [2022-11-19 07:01:36,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:01:36,240 INFO L495 AbstractCegarLoop]: Abstraction has 153 states and 170 transitions. [2022-11-19 07:01:36,240 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 27 states have (on average 2.6296296296296298) internal successors, (71), 31 states have internal predecessors, (71), 8 states have call successors, (13), 4 states have call predecessors, (13), 4 states have return successors, (11), 3 states have call predecessors, (11), 6 states have call successors, (11) [2022-11-19 07:01:36,240 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 170 transitions. [2022-11-19 07:01:36,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-11-19 07:01:36,245 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:01:36,246 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:01:36,256 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18e0f2b5-4226-4767-8bd2-110427c66437/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-11-19 07:01:36,451 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18e0f2b5-4226-4767-8bd2-110427c66437/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2022-11-19 07:01:36,451 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2022-11-19 07:01:36,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:01:36,452 INFO L85 PathProgramCache]: Analyzing trace with hash 160485480, now seen corresponding path program 1 times [2022-11-19 07:01:36,452 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:01:36,452 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1386626249] [2022-11-19 07:01:36,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:01:36,452 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:01:36,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:01:36,673 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-11-19 07:01:36,674 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:01:36,674 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1386626249] [2022-11-19 07:01:36,674 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1386626249] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:01:36,674 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [162830653] [2022-11-19 07:01:36,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:01:36,675 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:01:36,675 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18e0f2b5-4226-4767-8bd2-110427c66437/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:01:36,676 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18e0f2b5-4226-4767-8bd2-110427c66437/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:01:36,698 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18e0f2b5-4226-4767-8bd2-110427c66437/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-11-19 07:01:36,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:01:36,812 INFO L263 TraceCheckSpWp]: Trace formula consists of 307 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-19 07:01:36,814 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:01:37,018 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-19 07:01:37,143 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-19 07:01:37,147 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 5 proven. 9 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-11-19 07:01:37,147 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:01:37,184 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 32 treesize of output 28 [2022-11-19 07:01:37,350 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 5 proven. 9 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-11-19 07:01:37,350 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [162830653] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:01:37,351 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [620999203] [2022-11-19 07:01:37,352 INFO L159 IcfgInterpreter]: Started Sifa with 34 locations of interest [2022-11-19 07:01:37,352 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 07:01:37,353 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 07:01:37,353 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 07:01:37,353 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 07:01:37,407 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:01:37,408 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 22 treesize of output 22 [2022-11-19 07:01:37,422 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:01:37,423 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:01:37,424 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:01:37,425 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 34 [2022-11-19 07:01:37,453 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:01:37,454 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:01:37,472 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-19 07:01:37,472 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-19 07:01:37,510 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:01:37,512 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:01:37,529 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-19 07:01:37,529 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-19 07:01:37,614 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:01:37,616 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:01:37,634 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-19 07:01:37,634 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-19 07:01:37,687 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:01:37,689 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:01:37,707 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-19 07:01:37,708 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-19 07:01:37,822 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:01:37,823 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:01:37,842 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-19 07:01:37,842 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-19 07:01:37,893 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:01:37,894 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:01:37,914 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-19 07:01:37,914 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-19 07:01:38,023 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:01:38,031 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:01:38,033 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 36 treesize of output 32 [2022-11-19 07:01:38,128 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:01:38,129 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 43 treesize of output 39 [2022-11-19 07:01:38,176 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:01:38,179 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:01:38,181 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:01:38,183 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:01:38,185 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:01:38,187 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:01:38,189 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:01:38,191 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:01:38,193 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:01:38,195 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:01:38,197 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:01:38,199 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:01:38,201 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:01:38,203 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 18 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 63 [2022-11-19 07:01:40,104 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:01:40,130 INFO L321 Elim1Store]: treesize reduction 37, result has 38.3 percent of original size [2022-11-19 07:01:40,130 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 31 treesize of output 45 [2022-11-19 07:01:40,194 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:01:40,196 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:01:40,250 INFO L321 Elim1Store]: treesize reduction 48, result has 51.5 percent of original size [2022-11-19 07:01:40,250 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 50 treesize of output 87 [2022-11-19 07:01:42,565 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:01:42,566 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:01:42,584 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-19 07:01:42,585 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-19 07:01:42,628 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:01:42,629 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:01:42,651 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-19 07:01:42,651 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-19 07:01:42,698 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:01:42,699 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:01:42,721 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-19 07:01:42,721 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-19 07:01:42,754 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 20 for LOIs [2022-11-19 07:01:42,765 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 59 for LOIs [2022-11-19 07:01:42,779 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 07:02:01,340 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '12653#(and (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-19 07:02:01,340 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 07:02:01,340 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 07:02:01,340 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 7] total 16 [2022-11-19 07:02:01,341 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [745140111] [2022-11-19 07:02:01,341 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 07:02:01,341 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-19 07:02:01,341 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:02:01,342 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-19 07:02:01,342 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=1951, Unknown=1, NotChecked=0, Total=2162 [2022-11-19 07:02:01,343 INFO L87 Difference]: Start difference. First operand 153 states and 170 transitions. Second operand has 16 states, 16 states have (on average 4.6875) internal successors, (75), 16 states have internal predecessors, (75), 5 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2022-11-19 07:02:01,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:02:01,884 INFO L93 Difference]: Finished difference Result 158 states and 170 transitions. [2022-11-19 07:02:01,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-19 07:02:01,884 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 4.6875) internal successors, (75), 16 states have internal predecessors, (75), 5 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) Word has length 55 [2022-11-19 07:02:01,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:02:01,886 INFO L225 Difference]: With dead ends: 158 [2022-11-19 07:02:01,886 INFO L226 Difference]: Without dead ends: 158 [2022-11-19 07:02:01,887 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 123 SyntacticMatches, 3 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 842 ImplicationChecksByTransitivity, 19.0s TimeCoverageRelationStatistics Valid=288, Invalid=2681, Unknown=1, NotChecked=0, Total=2970 [2022-11-19 07:02:01,889 INFO L413 NwaCegarLoop]: 56 mSDtfsCounter, 183 mSDsluCounter, 304 mSDsCounter, 0 mSdLazyCounter, 305 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 186 SdHoareTripleChecker+Valid, 360 SdHoareTripleChecker+Invalid, 377 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 305 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 47 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-19 07:02:01,890 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [186 Valid, 360 Invalid, 377 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 305 Invalid, 0 Unknown, 47 Unchecked, 0.3s Time] [2022-11-19 07:02:01,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2022-11-19 07:02:01,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 156. [2022-11-19 07:02:01,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156 states, 119 states have (on average 1.084033613445378) internal successors, (129), 125 states have internal predecessors, (129), 21 states have call successors, (21), 12 states have call predecessors, (21), 11 states have return successors, (20), 18 states have call predecessors, (20), 20 states have call successors, (20) [2022-11-19 07:02:01,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 170 transitions. [2022-11-19 07:02:01,896 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 170 transitions. Word has length 55 [2022-11-19 07:02:01,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:02:01,897 INFO L495 AbstractCegarLoop]: Abstraction has 156 states and 170 transitions. [2022-11-19 07:02:01,897 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 4.6875) internal successors, (75), 16 states have internal predecessors, (75), 5 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2022-11-19 07:02:01,898 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 170 transitions. [2022-11-19 07:02:01,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-11-19 07:02:01,899 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:02:01,899 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:02:01,912 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18e0f2b5-4226-4767-8bd2-110427c66437/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-11-19 07:02:02,106 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18e0f2b5-4226-4767-8bd2-110427c66437/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:02:02,106 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr27REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2022-11-19 07:02:02,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:02:02,107 INFO L85 PathProgramCache]: Analyzing trace with hash -721790580, now seen corresponding path program 1 times [2022-11-19 07:02:02,107 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:02:02,107 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1332189287] [2022-11-19 07:02:02,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:02:02,108 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:02:02,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:02:03,068 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-11-19 07:02:03,068 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:02:03,068 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1332189287] [2022-11-19 07:02:03,068 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1332189287] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:02:03,068 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2085746567] [2022-11-19 07:02:03,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:02:03,069 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:02:03,069 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18e0f2b5-4226-4767-8bd2-110427c66437/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:02:03,070 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18e0f2b5-4226-4767-8bd2-110427c66437/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:02:03,072 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18e0f2b5-4226-4767-8bd2-110427c66437/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-11-19 07:02:03,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:02:03,228 INFO L263 TraceCheckSpWp]: Trace formula consists of 306 conjuncts, 57 conjunts are in the unsatisfiable core [2022-11-19 07:02:03,233 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:02:03,308 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 10 treesize of output 8 [2022-11-19 07:02:03,690 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-19 07:02:03,771 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2022-11-19 07:02:05,024 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-19 07:02:05,025 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 42 treesize of output 26 [2022-11-19 07:02:05,073 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-19 07:02:05,073 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:02:05,074 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2085746567] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:02:05,074 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-19 07:02:05,074 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [14] total 26 [2022-11-19 07:02:05,074 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1854888599] [2022-11-19 07:02:05,074 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:02:05,074 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-19 07:02:05,075 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:02:05,075 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-19 07:02:05,075 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=608, Unknown=0, NotChecked=0, Total=702 [2022-11-19 07:02:05,076 INFO L87 Difference]: Start difference. First operand 156 states and 170 transitions. Second operand has 14 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 14 states have internal predecessors, (33), 5 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) [2022-11-19 07:02:05,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:02:05,590 INFO L93 Difference]: Finished difference Result 161 states and 173 transitions. [2022-11-19 07:02:05,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-19 07:02:05,590 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 14 states have internal predecessors, (33), 5 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) Word has length 58 [2022-11-19 07:02:05,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:02:05,591 INFO L225 Difference]: With dead ends: 161 [2022-11-19 07:02:05,592 INFO L226 Difference]: Without dead ends: 161 [2022-11-19 07:02:05,592 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 41 SyntacticMatches, 6 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 231 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=119, Invalid=751, Unknown=0, NotChecked=0, Total=870 [2022-11-19 07:02:05,593 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 59 mSDsluCounter, 230 mSDsCounter, 0 mSdLazyCounter, 237 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 268 SdHoareTripleChecker+Invalid, 290 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 237 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 51 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-19 07:02:05,593 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [60 Valid, 268 Invalid, 290 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 237 Invalid, 0 Unknown, 51 Unchecked, 0.3s Time] [2022-11-19 07:02:05,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2022-11-19 07:02:05,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 159. [2022-11-19 07:02:05,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159 states, 122 states have (on average 1.0737704918032787) internal successors, (131), 127 states have internal predecessors, (131), 21 states have call successors, (21), 13 states have call predecessors, (21), 12 states have return successors, (20), 18 states have call predecessors, (20), 20 states have call successors, (20) [2022-11-19 07:02:05,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 172 transitions. [2022-11-19 07:02:05,598 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 172 transitions. Word has length 58 [2022-11-19 07:02:05,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:02:05,599 INFO L495 AbstractCegarLoop]: Abstraction has 159 states and 172 transitions. [2022-11-19 07:02:05,599 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 14 states have internal predecessors, (33), 5 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) [2022-11-19 07:02:05,599 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 172 transitions. [2022-11-19 07:02:05,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-11-19 07:02:05,600 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:02:05,600 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:02:05,607 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18e0f2b5-4226-4767-8bd2-110427c66437/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-11-19 07:02:05,802 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18e0f2b5-4226-4767-8bd2-110427c66437/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:02:05,803 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr31REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2022-11-19 07:02:05,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:02:05,803 INFO L85 PathProgramCache]: Analyzing trace with hash 2143956239, now seen corresponding path program 1 times [2022-11-19 07:02:05,803 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:02:05,803 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1758865227] [2022-11-19 07:02:05,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:02:05,804 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:02:05,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:02:06,289 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-11-19 07:02:06,289 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:02:06,289 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1758865227] [2022-11-19 07:02:06,289 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1758865227] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:02:06,290 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:02:06,290 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-19 07:02:06,290 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [261406495] [2022-11-19 07:02:06,290 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:02:06,290 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-19 07:02:06,291 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:02:06,291 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-19 07:02:06,291 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2022-11-19 07:02:06,292 INFO L87 Difference]: Start difference. First operand 159 states and 172 transitions. Second operand has 9 states, 8 states have (on average 4.0) internal successors, (32), 9 states have internal predecessors, (32), 3 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2022-11-19 07:02:06,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:02:06,805 INFO L93 Difference]: Finished difference Result 159 states and 171 transitions. [2022-11-19 07:02:06,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-19 07:02:06,806 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 4.0) internal successors, (32), 9 states have internal predecessors, (32), 3 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) Word has length 60 [2022-11-19 07:02:06,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:02:06,807 INFO L225 Difference]: With dead ends: 159 [2022-11-19 07:02:06,807 INFO L226 Difference]: Without dead ends: 159 [2022-11-19 07:02:06,807 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2022-11-19 07:02:06,808 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 139 mSDsluCounter, 115 mSDsCounter, 0 mSdLazyCounter, 233 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 144 SdHoareTripleChecker+Valid, 155 SdHoareTripleChecker+Invalid, 255 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 233 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-19 07:02:06,808 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [144 Valid, 155 Invalid, 255 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 233 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-19 07:02:06,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2022-11-19 07:02:06,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 159. [2022-11-19 07:02:06,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159 states, 122 states have (on average 1.0655737704918034) internal successors, (130), 127 states have internal predecessors, (130), 21 states have call successors, (21), 13 states have call predecessors, (21), 12 states have return successors, (20), 18 states have call predecessors, (20), 20 states have call successors, (20) [2022-11-19 07:02:06,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 171 transitions. [2022-11-19 07:02:06,813 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 171 transitions. Word has length 60 [2022-11-19 07:02:06,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:02:06,813 INFO L495 AbstractCegarLoop]: Abstraction has 159 states and 171 transitions. [2022-11-19 07:02:06,813 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 4.0) internal successors, (32), 9 states have internal predecessors, (32), 3 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2022-11-19 07:02:06,813 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 171 transitions. [2022-11-19 07:02:06,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-11-19 07:02:06,814 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:02:06,816 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 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] [2022-11-19 07:02:06,816 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2022-11-19 07:02:06,816 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2022-11-19 07:02:06,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:02:06,817 INFO L85 PathProgramCache]: Analyzing trace with hash -1395584350, now seen corresponding path program 1 times [2022-11-19 07:02:06,817 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:02:06,817 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [744404672] [2022-11-19 07:02:06,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:02:06,817 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:02:06,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:02:07,495 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 9 proven. 15 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-19 07:02:07,495 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:02:07,495 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [744404672] [2022-11-19 07:02:07,495 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [744404672] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:02:07,495 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1739903421] [2022-11-19 07:02:07,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:02:07,495 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:02:07,495 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18e0f2b5-4226-4767-8bd2-110427c66437/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:02:07,497 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18e0f2b5-4226-4767-8bd2-110427c66437/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:02:07,498 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18e0f2b5-4226-4767-8bd2-110427c66437/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-11-19 07:02:07,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:02:07,628 INFO L263 TraceCheckSpWp]: Trace formula consists of 330 conjuncts, 61 conjunts are in the unsatisfiable core [2022-11-19 07:02:07,631 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:02:07,650 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-11-19 07:02:08,124 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-19 07:02:08,184 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 25 treesize of output 20 [2022-11-19 07:02:08,752 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-19 07:02:08,752 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 35 treesize of output 19 [2022-11-19 07:02:08,827 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-19 07:02:08,827 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:02:09,062 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-19 07:02:09,062 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 706 treesize of output 654 [2022-11-19 07:02:10,375 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 5 proven. 19 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-19 07:02:10,375 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1739903421] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:02:10,375 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2039797965] [2022-11-19 07:02:10,377 INFO L159 IcfgInterpreter]: Started Sifa with 39 locations of interest [2022-11-19 07:02:10,377 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 07:02:10,377 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 07:02:10,377 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 07:02:10,378 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 07:02:10,448 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:02:10,449 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 22 treesize of output 22 [2022-11-19 07:02:10,461 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:02:10,462 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:02:10,463 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:02:10,464 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 34 [2022-11-19 07:02:10,494 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:02:10,495 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:02:10,514 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-19 07:02:10,514 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-19 07:02:10,552 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:02:10,553 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:02:10,571 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-19 07:02:10,571 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-19 07:02:10,663 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:02:10,664 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:02:10,687 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-19 07:02:10,688 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-19 07:02:10,740 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:02:10,741 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:02:10,762 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-19 07:02:10,762 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-19 07:02:10,867 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:02:10,868 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:02:10,891 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-19 07:02:10,891 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-19 07:02:10,943 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:02:10,944 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:02:10,965 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-19 07:02:10,966 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-19 07:02:11,069 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:02:11,070 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:02:11,071 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 36 treesize of output 32 [2022-11-19 07:02:11,135 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:02:11,136 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 43 treesize of output 39 [2022-11-19 07:02:11,165 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:02:11,167 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:02:11,169 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:02:11,171 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:02:11,172 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:02:11,174 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:02:11,176 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:02:11,177 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:02:11,179 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:02:11,181 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:02:11,183 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:02:11,185 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:02:11,187 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:02:11,188 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 18 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 63 [2022-11-19 07:02:11,829 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:02:11,831 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:02:11,832 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:02:11,848 INFO L321 Elim1Store]: treesize reduction 17, result has 46.9 percent of original size [2022-11-19 07:02:11,848 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 37 [2022-11-19 07:02:11,905 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:02:11,907 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:02:11,908 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:02:11,909 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:02:11,948 INFO L321 Elim1Store]: treesize reduction 28, result has 55.6 percent of original size [2022-11-19 07:02:11,948 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 42 treesize of output 63 [2022-11-19 07:02:14,272 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:02:14,274 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:02:14,297 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-19 07:02:14,298 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-19 07:02:14,351 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:02:14,353 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:02:14,378 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-19 07:02:14,379 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-19 07:02:14,431 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:02:14,433 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:02:14,457 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-19 07:02:14,458 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-19 07:02:14,487 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 18 for LOIs [2022-11-19 07:02:14,496 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 59 for LOIs [2022-11-19 07:02:14,512 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 07:02:39,852 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '14281#(and (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-19 07:02:39,853 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 07:02:39,853 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 07:02:39,853 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 17, 15] total 38 [2022-11-19 07:02:39,853 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1388511801] [2022-11-19 07:02:39,853 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 07:02:39,854 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-11-19 07:02:39,854 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:02:39,854 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-11-19 07:02:39,855 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=347, Invalid=4909, Unknown=0, NotChecked=0, Total=5256 [2022-11-19 07:02:39,855 INFO L87 Difference]: Start difference. First operand 159 states and 171 transitions. Second operand has 38 states, 33 states have (on average 2.878787878787879) internal successors, (95), 37 states have internal predecessors, (95), 8 states have call successors, (13), 4 states have call predecessors, (13), 4 states have return successors, (11), 3 states have call predecessors, (11), 6 states have call successors, (11) [2022-11-19 07:02:43,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:02:43,697 INFO L93 Difference]: Finished difference Result 218 states and 232 transitions. [2022-11-19 07:02:43,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-11-19 07:02:43,698 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 33 states have (on average 2.878787878787879) internal successors, (95), 37 states have internal predecessors, (95), 8 states have call successors, (13), 4 states have call predecessors, (13), 4 states have return successors, (11), 3 states have call predecessors, (11), 6 states have call successors, (11) Word has length 62 [2022-11-19 07:02:43,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:02:43,699 INFO L225 Difference]: With dead ends: 218 [2022-11-19 07:02:43,699 INFO L226 Difference]: Without dead ends: 218 [2022-11-19 07:02:43,701 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 230 GetRequests, 125 SyntacticMatches, 7 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3579 ImplicationChecksByTransitivity, 29.1s TimeCoverageRelationStatistics Valid=852, Invalid=9048, Unknown=0, NotChecked=0, Total=9900 [2022-11-19 07:02:43,702 INFO L413 NwaCegarLoop]: 56 mSDtfsCounter, 591 mSDsluCounter, 766 mSDsCounter, 0 mSdLazyCounter, 1171 mSolverCounterSat, 186 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 592 SdHoareTripleChecker+Valid, 822 SdHoareTripleChecker+Invalid, 1472 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 186 IncrementalHoareTripleChecker+Valid, 1171 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 115 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-11-19 07:02:43,702 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [592 Valid, 822 Invalid, 1472 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [186 Valid, 1171 Invalid, 0 Unknown, 115 Unchecked, 1.2s Time] [2022-11-19 07:02:43,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2022-11-19 07:02:43,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 177. [2022-11-19 07:02:43,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 177 states, 136 states have (on average 1.0661764705882353) internal successors, (145), 142 states have internal predecessors, (145), 21 states have call successors, (21), 16 states have call predecessors, (21), 16 states have return successors, (20), 18 states have call predecessors, (20), 20 states have call successors, (20) [2022-11-19 07:02:43,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 186 transitions. [2022-11-19 07:02:43,709 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 186 transitions. Word has length 62 [2022-11-19 07:02:43,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:02:43,709 INFO L495 AbstractCegarLoop]: Abstraction has 177 states and 186 transitions. [2022-11-19 07:02:43,709 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 33 states have (on average 2.878787878787879) internal successors, (95), 37 states have internal predecessors, (95), 8 states have call successors, (13), 4 states have call predecessors, (13), 4 states have return successors, (11), 3 states have call predecessors, (11), 6 states have call successors, (11) [2022-11-19 07:02:43,710 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 186 transitions. [2022-11-19 07:02:43,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-11-19 07:02:43,711 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:02:43,711 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:02:43,717 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18e0f2b5-4226-4767-8bd2-110427c66437/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2022-11-19 07:02:43,916 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18e0f2b5-4226-4767-8bd2-110427c66437/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2022-11-19 07:02:43,917 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2022-11-19 07:02:43,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:02:43,917 INFO L85 PathProgramCache]: Analyzing trace with hash 99582740, now seen corresponding path program 1 times [2022-11-19 07:02:43,917 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:02:43,917 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [867616789] [2022-11-19 07:02:43,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:02:43,917 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:02:43,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:02:45,542 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 7 proven. 10 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-11-19 07:02:45,543 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:02:45,543 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [867616789] [2022-11-19 07:02:45,543 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [867616789] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:02:45,543 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1312283301] [2022-11-19 07:02:45,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:02:45,543 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:02:45,544 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18e0f2b5-4226-4767-8bd2-110427c66437/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:02:45,545 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18e0f2b5-4226-4767-8bd2-110427c66437/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:02:45,550 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18e0f2b5-4226-4767-8bd2-110427c66437/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-11-19 07:02:45,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:02:45,742 INFO L263 TraceCheckSpWp]: Trace formula consists of 332 conjuncts, 114 conjunts are in the unsatisfiable core [2022-11-19 07:02:45,747 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:02:45,762 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2022-11-19 07:02:46,373 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 0 case distinctions, treesize of input 22 treesize of output 17 [2022-11-19 07:02:46,498 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 29 treesize of output 24 [2022-11-19 07:02:46,541 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 10 treesize of output 8 [2022-11-19 07:02:47,773 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:02:47,774 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 43 [2022-11-19 07:02:47,804 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 8 treesize of output 7 [2022-11-19 07:02:47,968 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:02:47,969 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:02:47,974 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 51 [2022-11-19 07:02:47,980 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 8 treesize of output 7 [2022-11-19 07:02:51,680 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:02:51,681 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:02:51,691 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-19 07:02:51,691 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 57 treesize of output 47 [2022-11-19 07:02:51,699 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 26 treesize of output 22 [2022-11-19 07:02:51,706 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 26 treesize of output 22 [2022-11-19 07:02:51,893 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 8 proven. 17 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-11-19 07:02:51,893 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:02:53,350 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:02:53,354 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2022-11-19 07:02:58,463 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1312283301] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:02:58,464 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1335040307] [2022-11-19 07:02:58,465 INFO L159 IcfgInterpreter]: Started Sifa with 45 locations of interest [2022-11-19 07:02:58,466 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 07:02:58,466 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 07:02:58,466 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 07:02:58,466 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 07:02:58,564 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:02:58,565 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:02:58,566 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:02:58,568 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 34 [2022-11-19 07:02:58,586 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:02:58,590 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 22 treesize of output 22 [2022-11-19 07:02:58,626 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:02:58,627 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:02:58,649 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-19 07:02:58,650 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-19 07:02:58,699 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:02:58,701 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:02:58,724 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-19 07:02:58,725 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-19 07:02:58,832 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:02:58,833 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:02:58,859 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-19 07:02:58,859 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-19 07:02:58,928 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:02:58,929 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:02:58,954 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-19 07:02:58,954 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-19 07:02:59,088 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:02:59,090 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:02:59,114 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-19 07:02:59,115 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-19 07:02:59,181 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:02:59,182 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:02:59,206 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-19 07:02:59,206 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-19 07:02:59,351 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:02:59,353 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:02:59,354 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 36 treesize of output 32 [2022-11-19 07:02:59,445 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:02:59,447 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:02:59,448 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 43 treesize of output 39 [2022-11-19 07:02:59,491 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:02:59,493 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:02:59,495 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:02:59,498 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:02:59,500 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:02:59,503 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:02:59,505 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:02:59,508 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:02:59,510 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:02:59,512 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:02:59,514 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:02:59,517 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:02:59,519 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:02:59,530 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 18 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 63 [2022-11-19 07:02:59,870 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:02:59,871 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:02:59,873 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:02:59,874 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:02:59,875 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 65 treesize of output 62 [2022-11-19 07:02:59,905 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 8 treesize of output 7 [2022-11-19 07:03:00,040 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:03:00,041 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:03:00,043 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:03:00,045 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:03:00,047 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:03:00,049 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:03:00,050 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 57 [2022-11-19 07:03:00,073 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 8 treesize of output 7 [2022-11-19 07:03:00,234 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:03:00,236 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:03:00,238 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:03:00,250 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:03:00,252 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:03:00,256 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:03:00,260 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:03:00,262 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:03:00,265 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:03:00,268 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:03:00,269 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:03:00,271 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:03:00,275 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:03:00,277 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:03:00,278 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:03:00,279 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:03:00,282 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:03:00,328 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-19 07:03:00,328 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 20 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 2 case distinctions, treesize of input 48 treesize of output 46 [2022-11-19 07:03:00,539 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:03:00,541 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:03:00,543 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:03:00,555 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:03:00,557 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:03:00,559 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:03:00,561 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:03:00,563 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:03:00,565 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:03:00,570 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:03:00,572 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:03:00,575 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:03:00,578 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:03:00,579 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:03:00,581 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:03:00,581 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:03:00,582 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:03:00,634 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-19 07:03:00,635 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 20 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 2 case distinctions, treesize of input 48 treesize of output 46 [2022-11-19 07:03:01,083 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:03:01,085 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:03:01,087 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:03:01,100 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:03:01,103 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:03:01,106 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:03:01,109 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:03:01,111 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:03:01,112 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:03:01,114 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:03:01,116 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:03:01,118 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:03:01,124 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:03:01,126 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:03:01,127 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:03:01,131 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:03:01,135 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:03:01,188 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-19 07:03:01,188 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 20 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 2 case distinctions, treesize of input 48 treesize of output 46 [2022-11-19 07:03:01,415 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:03:01,417 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:03:01,418 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:03:01,430 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:03:01,434 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:03:01,436 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:03:01,438 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:03:01,440 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:03:01,442 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:03:01,444 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:03:01,445 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:03:01,447 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:03:01,449 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:03:01,451 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:03:01,452 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:03:01,453 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:03:01,457 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:03:01,497 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-19 07:03:01,498 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 20 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 2 case distinctions, treesize of input 48 treesize of output 46 [2022-11-19 07:03:02,881 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:03:02,883 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:03:02,885 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:03:02,896 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:03:02,899 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:03:02,901 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:03:02,903 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:03:02,906 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:03:02,911 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:03:02,913 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:03:02,915 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:03:02,918 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:03:02,920 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:03:02,922 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:03:02,923 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:03:02,926 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:03:02,931 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:03:02,975 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-19 07:03:02,976 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 20 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 2 case distinctions, treesize of input 48 treesize of output 46 [2022-11-19 07:03:03,690 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:03:03,691 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:03:03,694 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:03:03,707 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:03:03,708 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:03:03,711 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:03:03,714 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:03:03,716 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:03:03,719 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:03:03,721 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:03:03,724 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:03:03,726 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:03:03,732 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:03:03,734 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:03:03,735 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:03:03,736 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:03:03,745 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:03:03,794 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-19 07:03:03,794 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 20 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 2 case distinctions, treesize of input 48 treesize of output 46 [2022-11-19 07:03:05,372 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:03:05,374 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:03:05,375 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:03:05,386 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:03:05,387 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:03:05,389 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:03:05,390 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:03:05,392 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:03:05,395 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:03:05,401 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:03:05,404 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:03:05,406 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:03:05,409 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:03:05,411 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:03:05,413 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:03:05,414 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:03:05,415 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:03:05,461 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-19 07:03:05,461 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 20 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 2 case distinctions, treesize of input 48 treesize of output 46 [2022-11-19 07:03:05,687 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:03:05,689 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:03:05,692 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:03:05,705 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:03:05,706 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:03:05,710 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:03:05,712 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:03:05,715 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:03:05,717 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:03:05,719 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:03:05,720 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:03:05,722 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:03:05,723 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:03:05,725 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:03:05,726 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:03:05,727 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:03:05,728 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:03:05,772 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-19 07:03:05,772 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 20 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 2 case distinctions, treesize of input 48 treesize of output 46 [2022-11-19 07:03:06,359 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:03:06,361 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:03:06,363 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:03:06,375 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:03:06,377 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:03:06,381 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:03:06,384 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:03:06,385 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:03:06,387 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:03:06,389 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:03:06,391 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:03:06,393 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:03:06,396 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:03:06,398 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:03:06,399 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:03:06,400 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:03:06,404 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:03:06,448 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-19 07:03:06,449 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 20 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 2 case distinctions, treesize of input 48 treesize of output 46 [2022-11-19 07:03:06,584 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:03:06,586 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:03:06,588 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:03:06,599 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:03:06,601 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:03:06,603 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:03:06,604 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:03:06,607 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:03:06,609 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:03:06,611 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:03:06,613 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:03:06,614 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:03:06,620 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:03:06,622 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:03:06,624 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:03:06,624 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:03:06,625 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:03:06,671 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-19 07:03:06,672 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 20 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 2 case distinctions, treesize of input 48 treesize of output 46 [2022-11-19 07:03:06,828 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:03:06,830 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:03:06,832 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:03:06,843 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:03:06,845 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:03:06,848 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:03:06,849 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:03:06,851 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:03:06,854 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:03:06,856 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:03:06,858 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:03:06,860 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:03:06,865 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:03:06,867 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:03:06,868 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:03:06,868 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:03:06,876 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:03:06,914 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-19 07:03:06,915 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 20 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 2 case distinctions, treesize of input 48 treesize of output 46 [2022-11-19 07:03:07,332 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:03:07,334 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:03:07,335 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:03:07,346 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:03:07,348 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:03:07,350 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:03:07,351 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:03:07,353 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:03:07,354 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:03:07,356 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:03:07,357 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:03:07,359 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:03:07,364 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:03:07,366 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:03:07,367 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:03:07,368 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:03:07,371 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:03:07,410 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-19 07:03:07,411 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 20 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 2 case distinctions, treesize of input 48 treesize of output 46 [2022-11-19 07:03:07,713 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:03:07,714 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:03:07,716 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:03:07,725 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:03:07,726 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:03:07,728 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:03:07,729 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:03:07,730 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:03:07,732 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:03:07,733 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:03:07,735 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:03:07,736 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:03:07,740 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:03:07,742 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:03:07,742 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:03:07,744 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:03:07,750 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:03:07,777 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-19 07:03:07,778 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 20 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 2 case distinctions, treesize of input 48 treesize of output 46 [2022-11-19 07:03:07,837 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:03:07,838 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:03:07,858 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-19 07:03:07,858 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-19 07:03:07,903 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:03:07,904 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:03:07,922 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-19 07:03:07,923 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-19 07:03:07,968 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:03:07,970 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:03:07,991 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-19 07:03:07,991 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-19 07:03:08,015 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 163 for LOIs [2022-11-19 07:03:08,255 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 59 for LOIs [2022-11-19 07:03:08,269 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 07:04:07,350 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '15166#(and (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-19 07:04:07,350 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 07:04:07,350 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-19 07:04:07,350 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 25] total 42 [2022-11-19 07:04:07,351 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2039015454] [2022-11-19 07:04:07,351 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-19 07:04:07,351 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-11-19 07:04:07,351 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:04:07,352 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-11-19 07:04:07,352 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=962, Invalid=6518, Unknown=2, NotChecked=0, Total=7482 [2022-11-19 07:04:07,353 INFO L87 Difference]: Start difference. First operand 177 states and 186 transitions. Second operand has 42 states, 37 states have (on average 2.027027027027027) internal successors, (75), 40 states have internal predecessors, (75), 8 states have call successors, (17), 5 states have call predecessors, (17), 6 states have return successors, (15), 7 states have call predecessors, (15), 7 states have call successors, (15) [2022-11-19 07:04:07,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:04:07,652 INFO L93 Difference]: Finished difference Result 193 states and 202 transitions. [2022-11-19 07:04:07,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-11-19 07:04:07,653 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 37 states have (on average 2.027027027027027) internal successors, (75), 40 states have internal predecessors, (75), 8 states have call successors, (17), 5 states have call predecessors, (17), 6 states have return successors, (15), 7 states have call predecessors, (15), 7 states have call successors, (15) Word has length 64 [2022-11-19 07:04:07,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:04:07,654 INFO L225 Difference]: With dead ends: 193 [2022-11-19 07:04:07,654 INFO L226 Difference]: Without dead ends: 152 [2022-11-19 07:04:07,655 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 88 SyntacticMatches, 26 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3893 ImplicationChecksByTransitivity, 69.3s TimeCoverageRelationStatistics Valid=971, Invalid=6683, Unknown=2, NotChecked=0, Total=7656 [2022-11-19 07:04:07,655 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 26 mSDsluCounter, 344 mSDsCounter, 0 mSdLazyCounter, 291 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 370 SdHoareTripleChecker+Invalid, 516 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 291 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 221 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-19 07:04:07,655 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 370 Invalid, 516 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 291 Invalid, 0 Unknown, 221 Unchecked, 0.2s Time] [2022-11-19 07:04:07,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2022-11-19 07:04:07,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 152. [2022-11-19 07:04:07,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 117 states have (on average 1.0683760683760684) internal successors, (125), 122 states have internal predecessors, (125), 18 states have call successors, (18), 13 states have call predecessors, (18), 13 states have return successors, (17), 16 states have call predecessors, (17), 17 states have call successors, (17) [2022-11-19 07:04:07,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 160 transitions. [2022-11-19 07:04:07,660 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 160 transitions. Word has length 64 [2022-11-19 07:04:07,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:04:07,660 INFO L495 AbstractCegarLoop]: Abstraction has 152 states and 160 transitions. [2022-11-19 07:04:07,661 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 37 states have (on average 2.027027027027027) internal successors, (75), 40 states have internal predecessors, (75), 8 states have call successors, (17), 5 states have call predecessors, (17), 6 states have return successors, (15), 7 states have call predecessors, (15), 7 states have call successors, (15) [2022-11-19 07:04:07,661 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 160 transitions. [2022-11-19 07:04:07,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-11-19 07:04:07,661 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:04:07,662 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:04:07,678 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18e0f2b5-4226-4767-8bd2-110427c66437/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2022-11-19 07:04:07,867 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18e0f2b5-4226-4767-8bd2-110427c66437/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2022-11-19 07:04:07,868 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2022-11-19 07:04:07,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:04:07,868 INFO L85 PathProgramCache]: Analyzing trace with hash -1812487531, now seen corresponding path program 1 times [2022-11-19 07:04:07,869 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:04:07,869 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [629422270] [2022-11-19 07:04:07,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:04:07,869 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:04:07,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:04:09,849 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 10 proven. 11 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-11-19 07:04:09,849 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:04:09,849 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [629422270] [2022-11-19 07:04:09,849 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [629422270] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:04:09,849 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1985668371] [2022-11-19 07:04:09,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:04:09,849 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:04:09,850 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18e0f2b5-4226-4767-8bd2-110427c66437/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:04:09,850 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18e0f2b5-4226-4767-8bd2-110427c66437/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:04:09,853 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18e0f2b5-4226-4767-8bd2-110427c66437/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-11-19 07:04:09,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:04:09,996 INFO L263 TraceCheckSpWp]: Trace formula consists of 348 conjuncts, 104 conjunts are in the unsatisfiable core [2022-11-19 07:04:09,999 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:04:10,005 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-19 07:04:10,013 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2022-11-19 07:04:10,402 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 17 [2022-11-19 07:04:12,302 INFO L321 Elim1Store]: treesize reduction 16, result has 36.0 percent of original size [2022-11-19 07:04:12,303 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 22 [2022-11-19 07:04:12,333 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 24 [2022-11-19 07:04:13,692 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 50 [2022-11-19 07:04:13,714 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 [2022-11-19 07:04:13,877 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 51 [2022-11-19 07:04:13,881 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 8 treesize of output 7 [2022-11-19 07:04:46,705 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-19 07:04:46,705 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 61 treesize of output 51 [2022-11-19 07:04:46,713 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 30 treesize of output 26 [2022-11-19 07:04:46,719 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 30 treesize of output 26 [2022-11-19 07:04:46,987 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 14 proven. 21 refuted. 1 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-19 07:04:46,987 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:04:53,294 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1985668371] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:04:53,294 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [816481912] [2022-11-19 07:04:53,295 INFO L159 IcfgInterpreter]: Started Sifa with 45 locations of interest [2022-11-19 07:04:53,296 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 07:04:53,296 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 07:04:53,296 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 07:04:53,296 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 07:04:53,360 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:04:53,361 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 22 treesize of output 22 [2022-11-19 07:04:53,374 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:04:53,375 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:04:53,376 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:04:53,377 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 34 [2022-11-19 07:04:53,403 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:04:53,404 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:04:53,424 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-19 07:04:53,424 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-19 07:04:53,463 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:04:53,464 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:04:53,483 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-19 07:04:53,483 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-19 07:04:53,565 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:04:53,567 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:04:53,586 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-19 07:04:53,586 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-19 07:04:53,640 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:04:53,641 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:04:53,661 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-19 07:04:53,661 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-19 07:04:53,763 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:04:53,764 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:04:53,786 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-19 07:04:53,787 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-19 07:04:53,839 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:04:53,840 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:04:53,863 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-19 07:04:53,863 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-19 07:04:53,976 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:04:53,977 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:04:53,978 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 36 treesize of output 32 [2022-11-19 07:04:54,042 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:04:54,044 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:04:54,046 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:04:54,048 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:04:54,049 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:04:54,051 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:04:54,053 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:04:54,056 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:04:54,057 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:04:54,059 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:04:54,061 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:04:54,063 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:04:54,064 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:04:54,065 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 18 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 63 [2022-11-19 07:04:54,105 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:04:54,106 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 43 treesize of output 39 [2022-11-19 07:04:54,727 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:04:54,730 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:04:54,731 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:04:54,746 INFO L321 Elim1Store]: treesize reduction 17, result has 46.9 percent of original size [2022-11-19 07:04:54,747 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 37 [2022-11-19 07:04:54,798 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:04:54,799 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:04:54,801 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:04:54,801 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:04:54,841 INFO L321 Elim1Store]: treesize reduction 28, result has 55.6 percent of original size [2022-11-19 07:04:54,841 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 42 treesize of output 63 [2022-11-19 07:04:57,087 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:04:57,089 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:04:57,110 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-19 07:04:57,111 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-19 07:04:57,160 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:04:57,162 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:04:57,190 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-19 07:04:57,190 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-19 07:04:57,239 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:04:57,240 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:04:57,265 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-19 07:04:57,266 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-19 07:04:57,293 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 18 for LOIs [2022-11-19 07:04:57,304 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 59 for LOIs [2022-11-19 07:04:57,318 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 07:05:31,587 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '15973#(and (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-19 07:05:31,587 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 07:05:31,587 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-19 07:05:31,587 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 26] total 46 [2022-11-19 07:05:31,587 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [943962766] [2022-11-19 07:05:31,587 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-19 07:05:31,588 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-11-19 07:05:31,588 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:05:31,588 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-11-19 07:05:31,590 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=593, Invalid=10108, Unknown=11, NotChecked=0, Total=10712 [2022-11-19 07:05:31,590 INFO L87 Difference]: Start difference. First operand 152 states and 160 transitions. Second operand has 46 states, 43 states have (on average 1.9767441860465116) internal successors, (85), 44 states have internal predecessors, (85), 9 states have call successors, (17), 6 states have call predecessors, (17), 6 states have return successors, (15), 7 states have call predecessors, (15), 8 states have call successors, (15) [2022-11-19 07:05:33,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:05:33,743 INFO L93 Difference]: Finished difference Result 192 states and 200 transitions. [2022-11-19 07:05:33,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-11-19 07:05:33,744 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 43 states have (on average 1.9767441860465116) internal successors, (85), 44 states have internal predecessors, (85), 9 states have call successors, (17), 6 states have call predecessors, (17), 6 states have return successors, (15), 7 states have call predecessors, (15), 8 states have call successors, (15) Word has length 68 [2022-11-19 07:05:33,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:05:33,745 INFO L225 Difference]: With dead ends: 192 [2022-11-19 07:05:33,745 INFO L226 Difference]: Without dead ends: 88 [2022-11-19 07:05:33,746 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 224 GetRequests, 98 SyntacticMatches, 17 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4979 ImplicationChecksByTransitivity, 76.9s TimeCoverageRelationStatistics Valid=672, Invalid=11527, Unknown=11, NotChecked=0, Total=12210 [2022-11-19 07:05:33,747 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 40 mSDsluCounter, 513 mSDsCounter, 0 mSdLazyCounter, 528 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 539 SdHoareTripleChecker+Invalid, 1030 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 528 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 491 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-19 07:05:33,747 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 539 Invalid, 1030 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 528 Invalid, 0 Unknown, 491 Unchecked, 0.7s Time] [2022-11-19 07:05:33,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2022-11-19 07:05:33,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 81. [2022-11-19 07:05:33,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 61 states have (on average 1.0655737704918034) internal successors, (65), 64 states have internal predecessors, (65), 9 states have call successors, (9), 7 states have call predecessors, (9), 7 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-11-19 07:05:33,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 83 transitions. [2022-11-19 07:05:33,750 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 83 transitions. Word has length 68 [2022-11-19 07:05:33,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:05:33,751 INFO L495 AbstractCegarLoop]: Abstraction has 81 states and 83 transitions. [2022-11-19 07:05:33,751 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 43 states have (on average 1.9767441860465116) internal successors, (85), 44 states have internal predecessors, (85), 9 states have call successors, (17), 6 states have call predecessors, (17), 6 states have return successors, (15), 7 states have call predecessors, (15), 8 states have call successors, (15) [2022-11-19 07:05:33,751 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 83 transitions. [2022-11-19 07:05:33,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-11-19 07:05:33,752 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:05:33,752 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 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, 1, 1, 1] [2022-11-19 07:05:33,762 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18e0f2b5-4226-4767-8bd2-110427c66437/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-11-19 07:05:33,958 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18e0f2b5-4226-4767-8bd2-110427c66437/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2022-11-19 07:05:33,958 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr31REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2022-11-19 07:05:33,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:05:33,959 INFO L85 PathProgramCache]: Analyzing trace with hash -1985221542, now seen corresponding path program 1 times [2022-11-19 07:05:33,959 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:05:33,959 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1299718573] [2022-11-19 07:05:33,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:05:33,959 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:05:33,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:05:34,717 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-11-19 07:05:34,718 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:05:34,718 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1299718573] [2022-11-19 07:05:34,718 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1299718573] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:05:34,718 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [405389815] [2022-11-19 07:05:34,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:05:34,718 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:05:34,718 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18e0f2b5-4226-4767-8bd2-110427c66437/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:05:34,723 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18e0f2b5-4226-4767-8bd2-110427c66437/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:05:34,738 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18e0f2b5-4226-4767-8bd2-110427c66437/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-11-19 07:05:34,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:05:34,887 INFO L263 TraceCheckSpWp]: Trace formula consists of 356 conjuncts, 37 conjunts are in the unsatisfiable core [2022-11-19 07:05:34,890 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:05:35,468 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-19 07:05:36,177 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 29 treesize of output 17 [2022-11-19 07:05:36,216 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-11-19 07:05:36,216 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:05:36,416 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 42 treesize of output 38 [2022-11-19 07:05:36,432 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:05:36,433 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:05:36,671 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-19 07:05:36,671 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 37 treesize of output 41 [2022-11-19 07:05:37,032 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-11-19 07:05:37,032 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [405389815] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:05:37,033 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1711711950] [2022-11-19 07:05:37,034 INFO L159 IcfgInterpreter]: Started Sifa with 43 locations of interest [2022-11-19 07:05:37,034 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 07:05:37,035 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 07:05:37,035 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 07:05:37,035 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 07:05:37,096 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:05:37,098 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:05:37,099 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:05:37,100 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 34 [2022-11-19 07:05:37,131 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:05:37,132 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 22 treesize of output 22 [2022-11-19 07:05:37,167 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:05:37,168 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:05:37,191 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-19 07:05:37,192 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-19 07:05:37,239 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:05:37,240 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:05:37,265 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-19 07:05:37,266 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-19 07:05:37,371 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:05:37,372 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:05:37,397 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-19 07:05:37,398 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-19 07:05:37,468 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:05:37,469 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:05:37,494 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-19 07:05:37,494 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-19 07:05:37,608 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:05:37,610 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:05:37,630 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-19 07:05:37,631 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-19 07:05:37,685 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:05:37,687 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:05:37,708 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-19 07:05:37,708 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-19 07:05:37,806 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:05:37,807 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:05:37,808 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 36 treesize of output 32 [2022-11-19 07:05:37,875 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:05:37,876 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 43 treesize of output 39 [2022-11-19 07:05:37,912 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:05:37,914 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:05:37,916 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:05:37,917 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:05:37,919 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:05:37,921 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:05:37,923 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:05:37,925 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:05:37,927 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:05:37,929 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:05:37,931 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:05:37,933 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:05:37,935 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:05:37,936 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 18 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 63 [2022-11-19 07:05:39,515 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:05:39,543 INFO L321 Elim1Store]: treesize reduction 37, result has 38.3 percent of original size [2022-11-19 07:05:39,543 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 31 treesize of output 45 [2022-11-19 07:05:39,655 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:05:39,657 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:05:39,717 INFO L321 Elim1Store]: treesize reduction 48, result has 51.5 percent of original size [2022-11-19 07:05:39,717 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 50 treesize of output 87 [2022-11-19 07:05:43,697 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:05:43,699 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:05:43,720 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-19 07:05:43,720 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-19 07:05:43,762 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:05:43,764 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:05:43,795 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-19 07:05:43,795 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-19 07:05:43,835 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:05:43,836 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:05:43,856 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-19 07:05:43,857 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-19 07:05:43,880 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 18 for LOIs [2022-11-19 07:05:43,886 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 59 for LOIs [2022-11-19 07:05:43,900 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 07:06:12,309 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '16749#(and (<= |ULTIMATE.start_mkdup_~a#1.offset| 0) (<= |ULTIMATE.start_main_~n~0#1| 2147483647) (<= 0 |ULTIMATE.start_finddup_~_i#1.offset|) (<= (+ |ULTIMATE.start_main_~#i~2#1.offset| 4) (select |#length| |ULTIMATE.start_main_~#i~2#1.base|)) (<= 0 |ULTIMATE.start_main_~#i~2#1.base|) (= (select |#valid| |ULTIMATE.start_main_~#j~2#1.base|) 1) (= |ULTIMATE.start_#Ultimate.meminit_#sizeOfFields#1| 4) (not (<= (+ |ULTIMATE.start_main_~a~0#1.offset| (* |ULTIMATE.start_main_#t~mem24#1| 4) 4) (select |#length| |ULTIMATE.start_main_~a~0#1.base|))) (<= |ULTIMATE.start_#Ultimate.meminit_#product#1| 8589934588) (<= |ULTIMATE.start_finddup_#in~_i#1.offset| 0) (<= 0 |ULTIMATE.start_main_~a~0#1.offset|) (<= 0 |ULTIMATE.start_finddup_#in~_i#1.offset|) (<= |ULTIMATE.start_mkdup_~j~0#1| 2147483647) (<= 0 |ULTIMATE.start_mkdup_~a#1.offset|) (<= |ULTIMATE.start_mkdup_~i~0#1| 2147483647) (<= |ULTIMATE.start_finddup_~a#1.offset| 0) (<= |ULTIMATE.start_mkdup_~n#1| 2147483647) (= (select (select |#memory_int| |ULTIMATE.start_main_~a~0#1.base|) (+ |ULTIMATE.start_main_~a~0#1.offset| (* |ULTIMATE.start_main_#t~mem23#1| 4))) |ULTIMATE.start_main_#t~mem25#1|) (<= |ULTIMATE.start_mkdup_#in~a#1.offset| 0) (<= 0 (+ |ULTIMATE.start_mkdup_~x~0#1| 2147483648)) (= |ULTIMATE.start_finddup_#res#1| 1) (<= |ULTIMATE.start_finddup_~_i#1.offset| 0) (<= 1 |ULTIMATE.start_finddup_#in~n#1|) (= |ULTIMATE.start_main_#t~mem24#1| (select (select |#memory_int| |ULTIMATE.start_main_~#j~2#1.base|) |ULTIMATE.start_main_~#j~2#1.offset|)) (<= |ULTIMATE.start_#Ultimate.meminit_#amountOfFields#1| 2147483647) (= |ULTIMATE.start_main_#t~mem23#1| (select (select |#memory_int| |ULTIMATE.start_main_~#i~2#1.base|) |ULTIMATE.start_main_~#i~2#1.offset|)) (= (select |#valid| |ULTIMATE.start_main_~#i~2#1.base|) 1) (<= 0 |ULTIMATE.start_finddup_~a#1.offset|) (<= |ULTIMATE.start_main_~r~0#1| 1) (<= 1 |ULTIMATE.start_#Ultimate.meminit_#amountOfFields#1|) (<= 1 |ULTIMATE.start_finddup_~j~1#1|) (<= 0 |ULTIMATE.start_finddup_~i~1#1|) (<= 0 |ULTIMATE.start_finddup_#in~_j#1.offset|) (<= 0 (+ |ULTIMATE.start_mkdup_~j~0#1| 2147483648)) (<= 0 |ULTIMATE.start_finddup_#in~_i#1.base|) (<= |ULTIMATE.start_mkdup_#in~n#1| 2147483647) (<= 0 |ULTIMATE.start_#Ultimate.meminit_#ptr#1.offset|) (<= 4 |ULTIMATE.start_#Ultimate.meminit_#product#1|) (<= |ULTIMATE.start_mkdup_~x~0#1| 2147483647) (<= (+ |ULTIMATE.start_main_~#j~2#1.offset| 4) (select |#length| |ULTIMATE.start_main_~#j~2#1.base|)) (<= 1 |ULTIMATE.start_mkdup_~n#1|) (<= 0 |ULTIMATE.start_finddup_~_i#1.base|) (= |ULTIMATE.start_main_#t~malloc13#1.offset| 0) (<= |ULTIMATE.start_finddup_~n#1| 2147483647) (<= |ULTIMATE.start_finddup_#in~n#1| 2147483647) (<= 0 (select (select |#memory_int| |ULTIMATE.start_main_~#i~2#1.base|) |ULTIMATE.start_main_~#i~2#1.offset|)) (<= 1 |ULTIMATE.start_main_~r~0#1|) (< (select (select |#memory_int| |ULTIMATE.start_main_~#j~2#1.base|) |ULTIMATE.start_main_~#j~2#1.offset|) |ULTIMATE.start_main_~n~0#1|) (<= |ULTIMATE.start_finddup_#in~a#1.offset| 0) (= |ULTIMATE.start_main_~#j~2#1.offset| 0) (<= 0 |ULTIMATE.start_finddup_~_j#1.offset|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_mkdup_#in~a#1.offset|) (<= 0 |ULTIMATE.start_finddup_~_j#1.base|) (<= 0 |ULTIMATE.start_main_~#j~2#1.base|) (<= |ULTIMATE.start_finddup_~_j#1.offset| 0) (<= 0 (+ |ULTIMATE.start_mkdup_~i~0#1| 2147483648)) (<= 0 |ULTIMATE.start_finddup_#in~a#1.offset|) (<= 0 |ULTIMATE.start_finddup_#in~_j#1.base|) (<= (+ |ULTIMATE.start_main_~a~0#1.offset| 4 (* |ULTIMATE.start_main_#t~mem23#1| 4)) (select |#length| |ULTIMATE.start_main_~a~0#1.base|)) (<= 1 |ULTIMATE.start_finddup_~n#1|) (= (select |#valid| |ULTIMATE.start_main_~a~0#1.base|) 1) (<= 1 |ULTIMATE.start_mkdup_#in~n#1|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~a~0#1.offset| 0) (<= |ULTIMATE.start_#Ultimate.meminit_#ptr#1.offset| 0) (<= |ULTIMATE.start_finddup_#in~_j#1.offset| 0) (= |#NULL.base| 0) (= |ULTIMATE.start_main_~#i~2#1.offset| 0))' at error location [2022-11-19 07:06:12,309 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 07:06:12,310 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 07:06:12,310 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 30 [2022-11-19 07:06:12,310 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [19275387] [2022-11-19 07:06:12,310 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 07:06:12,310 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-11-19 07:06:12,311 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:06:12,311 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-11-19 07:06:12,312 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=467, Invalid=4503, Unknown=0, NotChecked=0, Total=4970 [2022-11-19 07:06:12,312 INFO L87 Difference]: Start difference. First operand 81 states and 83 transitions. Second operand has 31 states, 30 states have (on average 3.966666666666667) internal successors, (119), 31 states have internal predecessors, (119), 7 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (22), 7 states have call predecessors, (22), 7 states have call successors, (22) [2022-11-19 07:06:13,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:06:13,525 INFO L93 Difference]: Finished difference Result 82 states and 84 transitions. [2022-11-19 07:06:13,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-11-19 07:06:13,526 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 30 states have (on average 3.966666666666667) internal successors, (119), 31 states have internal predecessors, (119), 7 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (22), 7 states have call predecessors, (22), 7 states have call successors, (22) Word has length 70 [2022-11-19 07:06:13,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:06:13,526 INFO L225 Difference]: With dead ends: 82 [2022-11-19 07:06:13,526 INFO L226 Difference]: Without dead ends: 82 [2022-11-19 07:06:13,527 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 231 GetRequests, 140 SyntacticMatches, 11 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2256 ImplicationChecksByTransitivity, 30.4s TimeCoverageRelationStatistics Valid=637, Invalid=6005, Unknown=0, NotChecked=0, Total=6642 [2022-11-19 07:06:13,527 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 151 mSDsluCounter, 280 mSDsCounter, 0 mSdLazyCounter, 503 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 151 SdHoareTripleChecker+Valid, 309 SdHoareTripleChecker+Invalid, 549 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 503 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 28 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-19 07:06:13,529 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [151 Valid, 309 Invalid, 549 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 503 Invalid, 0 Unknown, 28 Unchecked, 0.4s Time] [2022-11-19 07:06:13,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2022-11-19 07:06:13,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 80. [2022-11-19 07:06:13,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 61 states have (on average 1.0491803278688525) internal successors, (64), 63 states have internal predecessors, (64), 9 states have call successors, (9), 7 states have call predecessors, (9), 7 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-11-19 07:06:13,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 82 transitions. [2022-11-19 07:06:13,538 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 82 transitions. Word has length 70 [2022-11-19 07:06:13,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:06:13,539 INFO L495 AbstractCegarLoop]: Abstraction has 80 states and 82 transitions. [2022-11-19 07:06:13,539 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 30 states have (on average 3.966666666666667) internal successors, (119), 31 states have internal predecessors, (119), 7 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (22), 7 states have call predecessors, (22), 7 states have call successors, (22) [2022-11-19 07:06:13,539 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 82 transitions. [2022-11-19 07:06:13,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-11-19 07:06:13,540 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:06:13,540 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1] [2022-11-19 07:06:13,547 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18e0f2b5-4226-4767-8bd2-110427c66437/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2022-11-19 07:06:13,745 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18e0f2b5-4226-4767-8bd2-110427c66437/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2022-11-19 07:06:13,746 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2022-11-19 07:06:13,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:06:13,746 INFO L85 PathProgramCache]: Analyzing trace with hash -1090870049, now seen corresponding path program 1 times [2022-11-19 07:06:13,746 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:06:13,746 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1232097955] [2022-11-19 07:06:13,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:06:13,746 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:06:13,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:06:24,296 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 8 proven. 25 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-11-19 07:06:24,296 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:06:24,296 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1232097955] [2022-11-19 07:06:24,297 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1232097955] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:06:24,297 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [605222531] [2022-11-19 07:06:24,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:06:24,297 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:06:24,297 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18e0f2b5-4226-4767-8bd2-110427c66437/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:06:24,299 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18e0f2b5-4226-4767-8bd2-110427c66437/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:06:24,306 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18e0f2b5-4226-4767-8bd2-110427c66437/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-11-19 07:06:24,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:06:24,451 INFO L263 TraceCheckSpWp]: Trace formula consists of 370 conjuncts, 90 conjunts are in the unsatisfiable core [2022-11-19 07:06:24,455 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:06:24,582 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 10 treesize of output 8 [2022-11-19 07:06:26,123 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:06:26,124 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:06:26,125 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 31 [2022-11-19 07:06:26,264 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:06:26,265 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:06:26,266 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 39 [2022-11-19 07:06:28,727 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:06:28,728 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:06:28,757 INFO L321 Elim1Store]: treesize reduction 38, result has 22.4 percent of original size [2022-11-19 07:06:28,758 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 8 new quantified variables, introduced 6 case distinctions, treesize of input 52 treesize of output 36 [2022-11-19 07:06:28,957 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-11-19 07:06:28,958 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:06:30,993 INFO L321 Elim1Store]: treesize reduction 16, result has 95.7 percent of original size [2022-11-19 07:06:30,994 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 10 new quantified variables, introduced 28 case distinctions, treesize of input 10780 treesize of output 10039