./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/array-memsafety/cstrncpy-alloca-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version aef121e0 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21a6edcb-af60-4a32-bb46-6fb8d4eccf94/bin/utaipan-EQgc7hIp5V/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21a6edcb-af60-4a32-bb46-6fb8d4eccf94/bin/utaipan-EQgc7hIp5V/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21a6edcb-af60-4a32-bb46-6fb8d4eccf94/bin/utaipan-EQgc7hIp5V/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21a6edcb-af60-4a32-bb46-6fb8d4eccf94/bin/utaipan-EQgc7hIp5V/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/array-memsafety/cstrncpy-alloca-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21a6edcb-af60-4a32-bb46-6fb8d4eccf94/bin/utaipan-EQgc7hIp5V/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21a6edcb-af60-4a32-bb46-6fb8d4eccf94/bin/utaipan-EQgc7hIp5V --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 8246e56f0c6a2a64017cfdd94b26580c43f90ed61973daa969baf2d0942f8a17 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-aef121e [2021-11-23 03:31:57,799 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-23 03:31:57,802 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-23 03:31:57,862 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-23 03:31:57,863 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-23 03:31:57,868 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-23 03:31:57,870 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-23 03:31:57,874 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-23 03:31:57,877 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-23 03:31:57,884 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-23 03:31:57,885 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-23 03:31:57,887 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-23 03:31:57,888 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-23 03:31:57,891 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-23 03:31:57,893 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-23 03:31:57,898 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-23 03:31:57,900 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-23 03:31:57,902 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-23 03:31:57,904 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-23 03:31:57,913 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-23 03:31:57,916 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-23 03:31:57,918 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-23 03:31:57,921 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-23 03:31:57,923 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-23 03:31:57,934 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-23 03:31:57,934 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-23 03:31:57,935 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-23 03:31:57,937 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-23 03:31:57,938 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-23 03:31:57,939 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-23 03:31:57,939 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-23 03:31:57,940 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-23 03:31:57,941 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-23 03:31:57,942 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-23 03:31:57,944 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-23 03:31:57,944 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-23 03:31:57,945 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-23 03:31:57,945 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-23 03:31:57,946 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-23 03:31:57,947 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-23 03:31:57,948 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-23 03:31:57,949 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21a6edcb-af60-4a32-bb46-6fb8d4eccf94/bin/utaipan-EQgc7hIp5V/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2021-11-23 03:31:57,979 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-23 03:31:57,980 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-23 03:31:57,980 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-23 03:31:57,981 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-23 03:31:57,982 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-23 03:31:57,982 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-23 03:31:57,982 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-23 03:31:57,982 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-23 03:31:57,983 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-23 03:31:57,983 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-23 03:31:57,983 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-23 03:31:57,983 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-23 03:31:57,984 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-23 03:31:57,984 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-23 03:31:57,984 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-23 03:31:57,984 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-23 03:31:57,985 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-23 03:31:57,985 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-23 03:31:57,986 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-23 03:31:57,986 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-23 03:31:57,986 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-23 03:31:57,987 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-23 03:31:57,987 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-11-23 03:31:57,987 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-23 03:31:57,987 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-23 03:31:57,988 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-23 03:31:57,988 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-11-23 03:31:57,988 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-11-23 03:31:57,988 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-11-23 03:31:57,989 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-23 03:31:57,989 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-23 03:31:57,989 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-23 03:31:57,989 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-23 03:31:57,990 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-23 03:31:57,990 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-23 03:31:57,990 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 03:31:57,990 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-23 03:31:57,991 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-23 03:31:57,991 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-23 03:31:57,991 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-23 03:31:57,991 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-23 03:31:57,992 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-23 03:31:57,992 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES 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_21a6edcb-af60-4a32-bb46-6fb8d4eccf94/bin/utaipan-EQgc7hIp5V/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21a6edcb-af60-4a32-bb46-6fb8d4eccf94/bin/utaipan-EQgc7hIp5V Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8246e56f0c6a2a64017cfdd94b26580c43f90ed61973daa969baf2d0942f8a17 [2021-11-23 03:31:58,324 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-23 03:31:58,361 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-23 03:31:58,364 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-23 03:31:58,366 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-23 03:31:58,367 INFO L275 PluginConnector]: CDTParser initialized [2021-11-23 03:31:58,368 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21a6edcb-af60-4a32-bb46-6fb8d4eccf94/bin/utaipan-EQgc7hIp5V/../../sv-benchmarks/c/array-memsafety/cstrncpy-alloca-2.i [2021-11-23 03:31:58,453 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21a6edcb-af60-4a32-bb46-6fb8d4eccf94/bin/utaipan-EQgc7hIp5V/data/64bd7494f/4572368349124d20bbf7c769fab7e39f/FLAG5e729b442 [2021-11-23 03:31:59,022 INFO L306 CDTParser]: Found 1 translation units. [2021-11-23 03:31:59,023 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21a6edcb-af60-4a32-bb46-6fb8d4eccf94/sv-benchmarks/c/array-memsafety/cstrncpy-alloca-2.i [2021-11-23 03:31:59,039 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21a6edcb-af60-4a32-bb46-6fb8d4eccf94/bin/utaipan-EQgc7hIp5V/data/64bd7494f/4572368349124d20bbf7c769fab7e39f/FLAG5e729b442 [2021-11-23 03:31:59,362 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21a6edcb-af60-4a32-bb46-6fb8d4eccf94/bin/utaipan-EQgc7hIp5V/data/64bd7494f/4572368349124d20bbf7c769fab7e39f [2021-11-23 03:31:59,365 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-23 03:31:59,367 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-23 03:31:59,372 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-23 03:31:59,372 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-23 03:31:59,375 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-23 03:31:59,376 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 03:31:59" (1/1) ... [2021-11-23 03:31:59,377 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@f965050 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:31:59, skipping insertion in model container [2021-11-23 03:31:59,378 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 03:31:59" (1/1) ... [2021-11-23 03:31:59,385 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-23 03:31:59,427 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-23 03:31:59,871 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 03:31:59,884 INFO L203 MainTranslator]: Completed pre-run [2021-11-23 03:31:59,970 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 03:32:00,013 INFO L208 MainTranslator]: Completed translation [2021-11-23 03:32:00,013 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:32:00 WrapperNode [2021-11-23 03:32:00,014 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-23 03:32:00,016 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-23 03:32:00,016 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-23 03:32:00,016 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-23 03:32:00,027 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:32:00" (1/1) ... [2021-11-23 03:32:00,063 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:32:00" (1/1) ... [2021-11-23 03:32:00,108 INFO L137 Inliner]: procedures = 117, calls = 14, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 87 [2021-11-23 03:32:00,109 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-23 03:32:00,111 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-23 03:32:00,111 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-23 03:32:00,111 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-23 03:32:00,122 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:32:00" (1/1) ... [2021-11-23 03:32:00,123 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:32:00" (1/1) ... [2021-11-23 03:32:00,143 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:32:00" (1/1) ... [2021-11-23 03:32:00,144 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:32:00" (1/1) ... [2021-11-23 03:32:00,150 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:32:00" (1/1) ... [2021-11-23 03:32:00,155 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:32:00" (1/1) ... [2021-11-23 03:32:00,157 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:32:00" (1/1) ... [2021-11-23 03:32:00,161 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-23 03:32:00,162 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-23 03:32:00,162 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-23 03:32:00,162 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-23 03:32:00,164 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:32:00" (1/1) ... [2021-11-23 03:32:00,179 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 03:32:00,197 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21a6edcb-af60-4a32-bb46-6fb8d4eccf94/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:32:00,209 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21a6edcb-af60-4a32-bb46-6fb8d4eccf94/bin/utaipan-EQgc7hIp5V/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-23 03:32:00,231 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21a6edcb-af60-4a32-bb46-6fb8d4eccf94/bin/utaipan-EQgc7hIp5V/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-23 03:32:00,259 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-23 03:32:00,259 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-23 03:32:00,260 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-23 03:32:00,260 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-23 03:32:00,260 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-23 03:32:00,260 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-23 03:32:00,365 INFO L236 CfgBuilder]: Building ICFG [2021-11-23 03:32:00,367 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-23 03:32:00,581 INFO L277 CfgBuilder]: Performing block encoding [2021-11-23 03:32:00,675 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-23 03:32:00,675 INFO L301 CfgBuilder]: Removed 3 assume(true) statements. [2021-11-23 03:32:00,677 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 03:32:00 BoogieIcfgContainer [2021-11-23 03:32:00,678 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-23 03:32:00,699 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-23 03:32:00,699 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-23 03:32:00,703 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-23 03:32:00,703 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 03:31:59" (1/3) ... [2021-11-23 03:32:00,704 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@18b55d24 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 03:32:00, skipping insertion in model container [2021-11-23 03:32:00,704 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:32:00" (2/3) ... [2021-11-23 03:32:00,705 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@18b55d24 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 03:32:00, skipping insertion in model container [2021-11-23 03:32:00,705 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 03:32:00" (3/3) ... [2021-11-23 03:32:00,706 INFO L111 eAbstractionObserver]: Analyzing ICFG cstrncpy-alloca-2.i [2021-11-23 03:32:00,712 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-23 03:32:00,712 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 11 error locations. [2021-11-23 03:32:00,777 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-23 03:32:00,785 INFO L339 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, mLoopAccelerationTechnique=FAST_UPR [2021-11-23 03:32:00,785 INFO L340 AbstractCegarLoop]: Starting to check reachability of 11 error locations. [2021-11-23 03:32:00,804 INFO L276 IsEmpty]: Start isEmpty. Operand has 25 states, 13 states have (on average 2.230769230769231) internal successors, (29), 24 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:32:00,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2021-11-23 03:32:00,820 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:32:00,820 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1] [2021-11-23 03:32:00,821 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 7 more)] === [2021-11-23 03:32:00,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:32:00,842 INFO L85 PathProgramCache]: Analyzing trace with hash 122785, now seen corresponding path program 1 times [2021-11-23 03:32:00,853 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:32:00,855 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1954399330] [2021-11-23 03:32:00,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:32:00,856 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:32:01,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:32:01,117 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:32:01,118 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:32:01,119 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1954399330] [2021-11-23 03:32:01,119 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1954399330] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:32:01,146 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:32:01,147 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-11-23 03:32:01,151 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [318083179] [2021-11-23 03:32:01,152 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:32:01,157 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 03:32:01,158 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:32:01,198 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 03:32:01,199 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 03:32:01,201 INFO L87 Difference]: Start difference. First operand has 25 states, 13 states have (on average 2.230769230769231) internal successors, (29), 24 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:32:01,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:32:01,281 INFO L93 Difference]: Finished difference Result 23 states and 26 transitions. [2021-11-23 03:32:01,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 03:32:01,284 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3 [2021-11-23 03:32:01,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:32:01,293 INFO L225 Difference]: With dead ends: 23 [2021-11-23 03:32:01,294 INFO L226 Difference]: Without dead ends: 22 [2021-11-23 03:32:01,296 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 03:32:01,301 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 21 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 11 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 03:32:01,302 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 11 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 03:32:01,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2021-11-23 03:32:01,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2021-11-23 03:32:01,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 21 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:32:01,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 25 transitions. [2021-11-23 03:32:01,341 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 25 transitions. Word has length 3 [2021-11-23 03:32:01,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:32:01,342 INFO L470 AbstractCegarLoop]: Abstraction has 22 states and 25 transitions. [2021-11-23 03:32:01,342 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:32:01,343 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 25 transitions. [2021-11-23 03:32:01,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2021-11-23 03:32:01,343 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:32:01,344 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1] [2021-11-23 03:32:01,344 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-23 03:32:01,344 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 7 more)] === [2021-11-23 03:32:01,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:32:01,346 INFO L85 PathProgramCache]: Analyzing trace with hash 122786, now seen corresponding path program 1 times [2021-11-23 03:32:01,346 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:32:01,347 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1200219638] [2021-11-23 03:32:01,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:32:01,347 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:32:01,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:32:01,463 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:32:01,463 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:32:01,463 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1200219638] [2021-11-23 03:32:01,464 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1200219638] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:32:01,464 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:32:01,464 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-23 03:32:01,464 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1821881180] [2021-11-23 03:32:01,465 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:32:01,466 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 03:32:01,466 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:32:01,467 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 03:32:01,467 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-23 03:32:01,467 INFO L87 Difference]: Start difference. First operand 22 states and 25 transitions. Second operand has 4 states, 3 states have (on average 1.0) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:32:01,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:32:01,555 INFO L93 Difference]: Finished difference Result 42 states and 48 transitions. [2021-11-23 03:32:01,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 03:32:01,556 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.0) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3 [2021-11-23 03:32:01,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:32:01,557 INFO L225 Difference]: With dead ends: 42 [2021-11-23 03:32:01,557 INFO L226 Difference]: Without dead ends: 42 [2021-11-23 03:32:01,558 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-23 03:32:01,560 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 22 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 31 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 [2021-11-23 03:32:01,561 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 31 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 03:32:01,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2021-11-23 03:32:01,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 24. [2021-11-23 03:32:01,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 23 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:32:01,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 28 transitions. [2021-11-23 03:32:01,568 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 28 transitions. Word has length 3 [2021-11-23 03:32:01,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:32:01,568 INFO L470 AbstractCegarLoop]: Abstraction has 24 states and 28 transitions. [2021-11-23 03:32:01,569 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.0) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:32:01,569 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 28 transitions. [2021-11-23 03:32:01,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2021-11-23 03:32:01,569 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:32:01,570 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1] [2021-11-23 03:32:01,570 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-23 03:32:01,570 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 7 more)] === [2021-11-23 03:32:01,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:32:01,571 INFO L85 PathProgramCache]: Analyzing trace with hash 124903, now seen corresponding path program 1 times [2021-11-23 03:32:01,572 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:32:01,572 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [583379799] [2021-11-23 03:32:01,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:32:01,572 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:32:01,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:32:01,676 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:32:01,676 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:32:01,676 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [583379799] [2021-11-23 03:32:01,677 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [583379799] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:32:01,677 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:32:01,677 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-11-23 03:32:01,678 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2084046433] [2021-11-23 03:32:01,680 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:32:01,681 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 03:32:01,681 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:32:01,683 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 03:32:01,683 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 03:32:01,684 INFO L87 Difference]: Start difference. First operand 24 states and 28 transitions. Second operand has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:32:01,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:32:01,728 INFO L93 Difference]: Finished difference Result 23 states and 27 transitions. [2021-11-23 03:32:01,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 03:32:01,729 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3 [2021-11-23 03:32:01,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:32:01,730 INFO L225 Difference]: With dead ends: 23 [2021-11-23 03:32:01,731 INFO L226 Difference]: Without dead ends: 23 [2021-11-23 03:32:01,732 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 03:32:01,742 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 22 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 03:32:01,748 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 10 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 03:32:01,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2021-11-23 03:32:01,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2021-11-23 03:32:01,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 15 states have (on average 1.8) internal successors, (27), 22 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:32:01,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 27 transitions. [2021-11-23 03:32:01,757 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 27 transitions. Word has length 3 [2021-11-23 03:32:01,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:32:01,757 INFO L470 AbstractCegarLoop]: Abstraction has 23 states and 27 transitions. [2021-11-23 03:32:01,758 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:32:01,758 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 27 transitions. [2021-11-23 03:32:01,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-11-23 03:32:01,760 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:32:01,760 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1] [2021-11-23 03:32:01,761 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-23 03:32:01,761 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 7 more)] === [2021-11-23 03:32:01,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:32:01,762 INFO L85 PathProgramCache]: Analyzing trace with hash 118058628, now seen corresponding path program 1 times [2021-11-23 03:32:01,762 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:32:01,762 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1057122335] [2021-11-23 03:32:01,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:32:01,763 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:32:01,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:32:01,958 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:32:01,958 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:32:01,958 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1057122335] [2021-11-23 03:32:01,959 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1057122335] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 03:32:01,959 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1005433307] [2021-11-23 03:32:01,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:32:01,960 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:32:01,960 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21a6edcb-af60-4a32-bb46-6fb8d4eccf94/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:32:01,966 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21a6edcb-af60-4a32-bb46-6fb8d4eccf94/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:32:01,974 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21a6edcb-af60-4a32-bb46-6fb8d4eccf94/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-23 03:32:02,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:32:02,036 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-23 03:32:02,041 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:32:02,121 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-23 03:32:02,122 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-11-23 03:32:02,246 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:32:02,247 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:32:02,498 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:32:02,498 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1005433307] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 03:32:02,499 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [230200370] [2021-11-23 03:32:02,521 INFO L159 IcfgInterpreter]: Started Sifa with 4 locations of interest [2021-11-23 03:32:02,522 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 03:32:02,527 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 03:32:02,533 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 03:32:02,534 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 03:32:02,620 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:32:02,622 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2021-11-23 03:32:02,736 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-11-23 03:32:02,869 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2021-11-23 03:32:02,936 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2021-11-23 03:32:02,969 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 03:32:03,297 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '230#(and (<= |ULTIMATE.start_main_~length~0#1| 2147483647) (<= |ULTIMATE.start_main_~n~0#1| 2147483647) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.offset|) (<= 0 |ULTIMATE.start_main_#t~malloc10#1.base|) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.base|) (<= |ULTIMATE.start_main_#t~nondet13#1| 127) (<= |ULTIMATE.start_main_~nondetString~0#1.offset| 0) (< (select |#length| |ULTIMATE.start_main_~nondetString~0#1.base|) (+ |ULTIMATE.start_main_~i~0#1| |ULTIMATE.start_main_~nondetString~0#1.offset| 1)) (<= 0 |ULTIMATE.start_main_#t~malloc11#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString~0#1.base|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_main_~nondetString~0#1.offset|) (<= 0 (+ 128 |ULTIMATE.start_main_#t~nondet13#1|)) (<= 1 |ULTIMATE.start_main_~n~0#1|) (<= 1 |ULTIMATE.start_main_~length~0#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start_main_#t~malloc11#1.offset| 0) (<= |ULTIMATE.start_main_~nondetArea~0#1.offset| 0) (<= 0 |#StackHeapBarrier|) (= |ULTIMATE.start_main_#t~malloc10#1.offset| 0) (= |#NULL.base| 0))' at error location [2021-11-23 03:32:03,297 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-23 03:32:03,297 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 03:32:03,297 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 7 [2021-11-23 03:32:03,298 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [947144601] [2021-11-23 03:32:03,298 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 03:32:03,298 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-23 03:32:03,298 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:32:03,299 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-23 03:32:03,299 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2021-11-23 03:32:03,300 INFO L87 Difference]: Start difference. First operand 23 states and 27 transitions. Second operand has 9 states, 8 states have (on average 1.625) internal successors, (13), 8 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:32:03,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:32:03,495 INFO L93 Difference]: Finished difference Result 57 states and 66 transitions. [2021-11-23 03:32:03,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-23 03:32:03,496 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 1.625) internal successors, (13), 8 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2021-11-23 03:32:03,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:32:03,497 INFO L225 Difference]: With dead ends: 57 [2021-11-23 03:32:03,497 INFO L226 Difference]: Without dead ends: 57 [2021-11-23 03:32:03,497 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2021-11-23 03:32:03,498 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 122 mSDsluCounter, 84 mSDsCounter, 0 mSdLazyCounter, 117 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 122 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 121 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 117 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 03:32:03,499 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [122 Valid, 100 Invalid, 121 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 117 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 03:32:03,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2021-11-23 03:32:03,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 20. [2021-11-23 03:32:03,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 19 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:32:03,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 23 transitions. [2021-11-23 03:32:03,510 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 23 transitions. Word has length 5 [2021-11-23 03:32:03,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:32:03,511 INFO L470 AbstractCegarLoop]: Abstraction has 20 states and 23 transitions. [2021-11-23 03:32:03,511 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 1.625) internal successors, (13), 8 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:32:03,511 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 23 transitions. [2021-11-23 03:32:03,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-11-23 03:32:03,512 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:32:03,512 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-11-23 03:32:03,554 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21a6edcb-af60-4a32-bb46-6fb8d4eccf94/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-23 03:32:03,738 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21a6edcb-af60-4a32-bb46-6fb8d4eccf94/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:32:03,738 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 7 more)] === [2021-11-23 03:32:03,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:32:03,739 INFO L85 PathProgramCache]: Analyzing trace with hash 120082237, now seen corresponding path program 1 times [2021-11-23 03:32:03,739 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:32:03,739 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [563377049] [2021-11-23 03:32:03,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:32:03,739 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:32:03,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:32:03,822 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:32:03,823 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:32:03,823 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [563377049] [2021-11-23 03:32:03,823 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [563377049] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:32:03,824 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:32:03,824 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 03:32:03,824 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1501036434] [2021-11-23 03:32:03,824 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:32:03,825 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 03:32:03,825 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:32:03,825 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 03:32:03,826 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-23 03:32:03,826 INFO L87 Difference]: Start difference. First operand 20 states and 23 transitions. Second operand has 5 states, 4 states have (on average 1.25) internal successors, (5), 4 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:32:03,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:32:03,885 INFO L93 Difference]: Finished difference Result 30 states and 34 transitions. [2021-11-23 03:32:03,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-23 03:32:03,886 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 1.25) internal successors, (5), 4 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2021-11-23 03:32:03,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:32:03,887 INFO L225 Difference]: With dead ends: 30 [2021-11-23 03:32:03,887 INFO L226 Difference]: Without dead ends: 30 [2021-11-23 03:32:03,887 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-23 03:32:03,888 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 39 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 03:32:03,889 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 27 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 03:32:03,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2021-11-23 03:32:03,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 22. [2021-11-23 03:32:03,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 15 states have (on average 1.8) internal successors, (27), 21 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:32:03,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 27 transitions. [2021-11-23 03:32:03,893 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 27 transitions. Word has length 5 [2021-11-23 03:32:03,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:32:03,893 INFO L470 AbstractCegarLoop]: Abstraction has 22 states and 27 transitions. [2021-11-23 03:32:03,894 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 1.25) internal successors, (5), 4 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:32:03,894 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 27 transitions. [2021-11-23 03:32:03,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-11-23 03:32:03,894 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:32:03,895 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-11-23 03:32:03,895 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-23 03:32:03,895 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 7 more)] === [2021-11-23 03:32:03,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:32:03,896 INFO L85 PathProgramCache]: Analyzing trace with hash 120082236, now seen corresponding path program 1 times [2021-11-23 03:32:03,896 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:32:03,896 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [445903490] [2021-11-23 03:32:03,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:32:03,897 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:32:03,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:32:03,933 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:32:03,933 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:32:03,934 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [445903490] [2021-11-23 03:32:03,934 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [445903490] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:32:03,934 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:32:03,934 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 03:32:03,935 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [189581175] [2021-11-23 03:32:03,935 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:32:03,935 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 03:32:03,935 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:32:03,936 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 03:32:03,936 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-23 03:32:03,936 INFO L87 Difference]: Start difference. First operand 22 states and 27 transitions. Second operand has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 4 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:32:03,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:32:03,983 INFO L93 Difference]: Finished difference Result 21 states and 25 transitions. [2021-11-23 03:32:03,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 03:32:03,984 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 4 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2021-11-23 03:32:03,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:32:03,986 INFO L225 Difference]: With dead ends: 21 [2021-11-23 03:32:03,986 INFO L226 Difference]: Without dead ends: 21 [2021-11-23 03:32:03,987 INFO L932 BasicCegarLoop]: 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 [2021-11-23 03:32:03,988 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 19 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 03:32:03,989 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 15 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 03:32:03,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2021-11-23 03:32:03,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2021-11-23 03:32:03,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 20 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:32:03,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 25 transitions. [2021-11-23 03:32:03,998 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 25 transitions. Word has length 5 [2021-11-23 03:32:03,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:32:03,999 INFO L470 AbstractCegarLoop]: Abstraction has 21 states and 25 transitions. [2021-11-23 03:32:03,999 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 4 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:32:03,999 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 25 transitions. [2021-11-23 03:32:04,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-11-23 03:32:04,000 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:32:04,000 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-11-23 03:32:04,001 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-23 03:32:04,001 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 7 more)] === [2021-11-23 03:32:04,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:32:04,002 INFO L85 PathProgramCache]: Analyzing trace with hash -572366656, now seen corresponding path program 1 times [2021-11-23 03:32:04,002 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:32:04,002 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2128959414] [2021-11-23 03:32:04,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:32:04,003 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:32:04,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:32:04,040 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:32:04,040 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:32:04,040 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2128959414] [2021-11-23 03:32:04,041 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2128959414] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:32:04,041 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:32:04,041 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 03:32:04,041 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1113738331] [2021-11-23 03:32:04,041 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:32:04,042 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 03:32:04,042 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:32:04,042 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 03:32:04,043 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-23 03:32:04,043 INFO L87 Difference]: Start difference. First operand 21 states and 25 transitions. Second operand has 4 states, 4 states have (on average 1.5) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:32:04,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:32:04,074 INFO L93 Difference]: Finished difference Result 21 states and 24 transitions. [2021-11-23 03:32:04,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 03:32:04,075 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.5) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2021-11-23 03:32:04,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:32:04,076 INFO L225 Difference]: With dead ends: 21 [2021-11-23 03:32:04,076 INFO L226 Difference]: Without dead ends: 21 [2021-11-23 03:32:04,076 INFO L932 BasicCegarLoop]: 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 [2021-11-23 03:32:04,078 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 20 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 03:32:04,078 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 27 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 03:32:04,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2021-11-23 03:32:04,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2021-11-23 03:32:04,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 15 states have (on average 1.6) internal successors, (24), 20 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:32:04,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 24 transitions. [2021-11-23 03:32:04,082 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 24 transitions. Word has length 6 [2021-11-23 03:32:04,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:32:04,082 INFO L470 AbstractCegarLoop]: Abstraction has 21 states and 24 transitions. [2021-11-23 03:32:04,083 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.5) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:32:04,083 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 24 transitions. [2021-11-23 03:32:04,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-11-23 03:32:04,083 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:32:04,084 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-11-23 03:32:04,084 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-23 03:32:04,084 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 7 more)] === [2021-11-23 03:32:04,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:32:04,085 INFO L85 PathProgramCache]: Analyzing trace with hash -572417961, now seen corresponding path program 1 times [2021-11-23 03:32:04,085 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:32:04,085 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1855767174] [2021-11-23 03:32:04,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:32:04,086 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:32:04,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:32:04,146 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:32:04,147 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:32:04,147 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1855767174] [2021-11-23 03:32:04,147 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1855767174] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:32:04,147 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:32:04,148 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 03:32:04,148 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1748597937] [2021-11-23 03:32:04,148 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:32:04,149 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 03:32:04,149 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:32:04,150 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 03:32:04,150 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-23 03:32:04,150 INFO L87 Difference]: Start difference. First operand 21 states and 24 transitions. Second operand has 5 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:32:04,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:32:04,218 INFO L93 Difference]: Finished difference Result 20 states and 23 transitions. [2021-11-23 03:32:04,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-23 03:32:04,219 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2021-11-23 03:32:04,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:32:04,221 INFO L225 Difference]: With dead ends: 20 [2021-11-23 03:32:04,222 INFO L226 Difference]: Without dead ends: 20 [2021-11-23 03:32:04,222 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-23 03:32:04,224 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 30 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 14 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 03:32:04,225 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 14 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 03:32:04,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2021-11-23 03:32:04,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2021-11-23 03:32:04,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 19 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:32:04,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 23 transitions. [2021-11-23 03:32:04,234 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 23 transitions. Word has length 6 [2021-11-23 03:32:04,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:32:04,235 INFO L470 AbstractCegarLoop]: Abstraction has 20 states and 23 transitions. [2021-11-23 03:32:04,235 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:32:04,235 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 23 transitions. [2021-11-23 03:32:04,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-11-23 03:32:04,236 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:32:04,236 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-11-23 03:32:04,236 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-23 03:32:04,236 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 7 more)] === [2021-11-23 03:32:04,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:32:04,237 INFO L85 PathProgramCache]: Analyzing trace with hash -572417960, now seen corresponding path program 1 times [2021-11-23 03:32:04,238 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:32:04,238 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2132584732] [2021-11-23 03:32:04,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:32:04,238 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:32:04,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:32:04,351 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:32:04,352 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:32:04,352 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2132584732] [2021-11-23 03:32:04,352 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2132584732] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:32:04,353 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:32:04,353 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 03:32:04,353 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [811593682] [2021-11-23 03:32:04,353 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:32:04,354 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 03:32:04,354 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:32:04,355 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 03:32:04,355 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-23 03:32:04,356 INFO L87 Difference]: Start difference. First operand 20 states and 23 transitions. Second operand has 5 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:32:04,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:32:04,425 INFO L93 Difference]: Finished difference Result 22 states and 26 transitions. [2021-11-23 03:32:04,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-23 03:32:04,426 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2021-11-23 03:32:04,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:32:04,428 INFO L225 Difference]: With dead ends: 22 [2021-11-23 03:32:04,429 INFO L226 Difference]: Without dead ends: 22 [2021-11-23 03:32:04,429 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-23 03:32:04,432 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 24 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 03:32:04,433 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [24 Valid, 21 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 03:32:04,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2021-11-23 03:32:04,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 21. [2021-11-23 03:32:04,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 16 states have (on average 1.5) internal successors, (24), 20 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:32:04,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 24 transitions. [2021-11-23 03:32:04,448 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 24 transitions. Word has length 6 [2021-11-23 03:32:04,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:32:04,448 INFO L470 AbstractCegarLoop]: Abstraction has 21 states and 24 transitions. [2021-11-23 03:32:04,449 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:32:04,449 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 24 transitions. [2021-11-23 03:32:04,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-11-23 03:32:04,450 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:32:04,450 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:32:04,450 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-23 03:32:04,451 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 7 more)] === [2021-11-23 03:32:04,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:32:04,451 INFO L85 PathProgramCache]: Analyzing trace with hash -1883269226, now seen corresponding path program 1 times [2021-11-23 03:32:04,452 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:32:04,452 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [830985919] [2021-11-23 03:32:04,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:32:04,452 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:32:04,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:32:04,595 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:32:04,596 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:32:04,596 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [830985919] [2021-11-23 03:32:04,596 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [830985919] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:32:04,596 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:32:04,597 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-23 03:32:04,597 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [759132655] [2021-11-23 03:32:04,597 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:32:04,597 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-23 03:32:04,598 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:32:04,598 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-23 03:32:04,598 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-23 03:32:04,599 INFO L87 Difference]: Start difference. First operand 21 states and 24 transitions. Second operand has 7 states, 7 states have (on average 1.2857142857142858) internal successors, (9), 6 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:32:04,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:32:04,713 INFO L93 Difference]: Finished difference Result 36 states and 40 transitions. [2021-11-23 03:32:04,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-23 03:32:04,713 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 1.2857142857142858) internal successors, (9), 6 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2021-11-23 03:32:04,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:32:04,714 INFO L225 Difference]: With dead ends: 36 [2021-11-23 03:32:04,714 INFO L226 Difference]: Without dead ends: 36 [2021-11-23 03:32:04,714 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2021-11-23 03:32:04,715 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 23 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 03:32:04,716 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 59 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 66 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 03:32:04,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2021-11-23 03:32:04,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 27. [2021-11-23 03:32:04,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 22 states have (on average 1.4090909090909092) internal successors, (31), 26 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:32:04,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 31 transitions. [2021-11-23 03:32:04,720 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 31 transitions. Word has length 9 [2021-11-23 03:32:04,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:32:04,721 INFO L470 AbstractCegarLoop]: Abstraction has 27 states and 31 transitions. [2021-11-23 03:32:04,721 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 1.2857142857142858) internal successors, (9), 6 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:32:04,721 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 31 transitions. [2021-11-23 03:32:04,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-11-23 03:32:04,722 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:32:04,722 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:32:04,723 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-23 03:32:04,723 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 7 more)] === [2021-11-23 03:32:04,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:32:04,723 INFO L85 PathProgramCache]: Analyzing trace with hash 1747644125, now seen corresponding path program 1 times [2021-11-23 03:32:04,724 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:32:04,724 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [995072036] [2021-11-23 03:32:04,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:32:04,726 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:32:04,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:32:04,799 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:32:04,799 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:32:04,799 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [995072036] [2021-11-23 03:32:04,799 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [995072036] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:32:04,800 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:32:04,801 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-23 03:32:04,801 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [764179443] [2021-11-23 03:32:04,802 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:32:04,802 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-23 03:32:04,802 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:32:04,803 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-23 03:32:04,803 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-23 03:32:04,804 INFO L87 Difference]: Start difference. First operand 27 states and 31 transitions. Second operand has 6 states, 5 states have (on average 2.0) internal successors, (10), 6 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:32:04,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:32:04,877 INFO L93 Difference]: Finished difference Result 27 states and 31 transitions. [2021-11-23 03:32:04,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-23 03:32:04,878 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.0) internal successors, (10), 6 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-11-23 03:32:04,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:32:04,878 INFO L225 Difference]: With dead ends: 27 [2021-11-23 03:32:04,879 INFO L226 Difference]: Without dead ends: 27 [2021-11-23 03:32:04,879 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-11-23 03:32:04,880 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 14 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 68 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 03:32:04,880 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 23 Invalid, 68 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 03:32:04,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-11-23 03:32:04,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 26. [2021-11-23 03:32:04,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 22 states have (on average 1.3636363636363635) internal successors, (30), 25 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:32:04,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 30 transitions. [2021-11-23 03:32:04,889 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 30 transitions. Word has length 10 [2021-11-23 03:32:04,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:32:04,890 INFO L470 AbstractCegarLoop]: Abstraction has 26 states and 30 transitions. [2021-11-23 03:32:04,890 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.0) internal successors, (10), 6 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:32:04,890 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 30 transitions. [2021-11-23 03:32:04,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-11-23 03:32:04,891 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:32:04,891 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:32:04,892 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-11-23 03:32:04,892 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 7 more)] === [2021-11-23 03:32:04,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:32:04,892 INFO L85 PathProgramCache]: Analyzing trace with hash 1747644126, now seen corresponding path program 1 times [2021-11-23 03:32:04,893 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:32:04,893 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1424211631] [2021-11-23 03:32:04,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:32:04,893 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:32:04,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:32:05,081 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:32:05,082 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:32:05,082 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1424211631] [2021-11-23 03:32:05,082 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1424211631] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:32:05,082 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:32:05,083 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-23 03:32:05,083 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [516629072] [2021-11-23 03:32:05,083 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:32:05,085 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-23 03:32:05,086 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:32:05,086 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-23 03:32:05,086 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-11-23 03:32:05,087 INFO L87 Difference]: Start difference. First operand 26 states and 30 transitions. Second operand has 9 states, 8 states have (on average 1.25) internal successors, (10), 8 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:32:05,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:32:05,288 INFO L93 Difference]: Finished difference Result 30 states and 36 transitions. [2021-11-23 03:32:05,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-23 03:32:05,288 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 1.25) internal successors, (10), 8 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-11-23 03:32:05,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:32:05,289 INFO L225 Difference]: With dead ends: 30 [2021-11-23 03:32:05,289 INFO L226 Difference]: Without dead ends: 30 [2021-11-23 03:32:05,289 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2021-11-23 03:32:05,290 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 37 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 110 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 124 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 110 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 03:32:05,291 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [37 Valid, 18 Invalid, 124 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 110 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 03:32:05,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2021-11-23 03:32:05,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 29. [2021-11-23 03:32:05,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 25 states have (on average 1.36) internal successors, (34), 28 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:32:05,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 34 transitions. [2021-11-23 03:32:05,293 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 34 transitions. Word has length 10 [2021-11-23 03:32:05,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:32:05,294 INFO L470 AbstractCegarLoop]: Abstraction has 29 states and 34 transitions. [2021-11-23 03:32:05,294 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 1.25) internal successors, (10), 8 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:32:05,294 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 34 transitions. [2021-11-23 03:32:05,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-11-23 03:32:05,294 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:32:05,295 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:32:05,295 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-11-23 03:32:05,295 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 7 more)] === [2021-11-23 03:32:05,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:32:05,295 INFO L85 PathProgramCache]: Analyzing trace with hash 1571091704, now seen corresponding path program 1 times [2021-11-23 03:32:05,295 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:32:05,296 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1781428922] [2021-11-23 03:32:05,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:32:05,296 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:32:05,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:32:05,415 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:32:05,416 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:32:05,416 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1781428922] [2021-11-23 03:32:05,416 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1781428922] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 03:32:05,416 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1103476447] [2021-11-23 03:32:05,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:32:05,417 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:32:05,417 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21a6edcb-af60-4a32-bb46-6fb8d4eccf94/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:32:05,418 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21a6edcb-af60-4a32-bb46-6fb8d4eccf94/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:32:05,431 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21a6edcb-af60-4a32-bb46-6fb8d4eccf94/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-23 03:32:05,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:32:05,488 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 27 conjunts are in the unsatisfiable core [2021-11-23 03:32:05,490 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:32:05,615 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:32:05,615 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:32:05,761 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-11-23 03:32:05,781 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:32:05,781 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1103476447] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 03:32:05,782 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1677515027] [2021-11-23 03:32:05,784 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2021-11-23 03:32:05,785 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 03:32:05,785 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 03:32:05,785 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 03:32:05,785 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 03:32:05,836 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:32:05,837 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2021-11-23 03:32:05,934 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-11-23 03:32:05,998 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2021-11-23 03:32:06,042 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2021-11-23 03:32:06,173 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-11-23 03:32:06,308 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:32:06,316 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:32:06,349 INFO L354 Elim1Store]: treesize reduction 60, result has 23.1 percent of original size [2021-11-23 03:32:06,349 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 29 treesize of output 31 [2021-11-23 03:32:06,519 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-23 03:32:06,520 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 18 [2021-11-23 03:32:06,740 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-23 03:32:06,740 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 18 [2021-11-23 03:32:06,868 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 03:32:08,057 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '874#(and (<= |ULTIMATE.start_main_~length~0#1| 2147483647) (<= |ULTIMATE.start_main_~n~0#1| 2147483647) (<= |ULTIMATE.start_cstrncpy_#in~n#1| 2147483647) (<= 0 |ULTIMATE.start_cstrncpy_#t~post4#1.base|) (<= 0 |ULTIMATE.start_cstrncpy_~s2#1.base|) (<= 0 |ULTIMATE.start_cstrncpy_#in~s1#1.base|) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.offset|) (<= 0 |ULTIMATE.start_cstrncpy_~src~0#1.base|) (<= 0 |ULTIMATE.start_cstrncpy_#in~s2#1.offset|) (<= 0 |ULTIMATE.start_main_#t~malloc10#1.base|) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.base|) (<= 0 |ULTIMATE.start_cstrncpy_#t~post3#1.base|) (< (select |#length| |ULTIMATE.start_cstrncpy_#t~post4#1.base|) (+ |ULTIMATE.start_cstrncpy_#t~post4#1.offset| 1)) (<= 0 |ULTIMATE.start_cstrncpy_~s1#1.offset|) (<= 1 |ULTIMATE.start_cstrncpy_#in~n#1|) (<= 0 |ULTIMATE.start_cstrncpy_~s1#1.base|) (<= |ULTIMATE.start_main_~nondetString~0#1.offset| 0) (<= 1 |ULTIMATE.start_cstrncpy_~src~0#1.offset|) (<= 0 |ULTIMATE.start_cstrncpy_#t~post4#1.offset|) (<= 0 |ULTIMATE.start_main_#t~malloc11#1.base|) (<= 1 |ULTIMATE.start_cstrncpy_~dst~0#1.offset|) (<= |ULTIMATE.start_cstrncpy_~s1#1.offset| 0) (<= 0 |ULTIMATE.start_cstrncpy_#in~s2#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString~0#1.base|) (<= 0 |ULTIMATE.start_cstrncpy_~s2#1.offset|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_cstrncpy_#t~post3#1.offset|) (<= 0 |ULTIMATE.start_main_~nondetString~0#1.offset|) (<= 0 |ULTIMATE.start_cstrncpy_#in~s1#1.offset|) (<= 1 |ULTIMATE.start_main_~n~0#1|) (<= |ULTIMATE.start_cstrncpy_#in~s2#1.offset| 0) (<= 1 |ULTIMATE.start_main_~length~0#1|) (<= |ULTIMATE.start_cstrncpy_#in~s1#1.offset| 0) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_cstrncpy_~dst~0#1.base|) (= |ULTIMATE.start_main_#t~malloc11#1.offset| 0) (<= |ULTIMATE.start_cstrncpy_~s2#1.offset| 0) (<= |ULTIMATE.start_cstrncpy_~n#1| 2147483646) (<= |ULTIMATE.start_main_~nondetArea~0#1.offset| 0) (<= 0 |#StackHeapBarrier|) (= |ULTIMATE.start_main_#t~malloc10#1.offset| 0) (= |#NULL.base| 0))' at error location [2021-11-23 03:32:08,058 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-23 03:32:08,058 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 03:32:08,058 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 15 [2021-11-23 03:32:08,058 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1189190468] [2021-11-23 03:32:08,058 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 03:32:08,059 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-11-23 03:32:08,059 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:32:08,059 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-11-23 03:32:08,059 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=509, Unknown=0, NotChecked=0, Total=600 [2021-11-23 03:32:08,060 INFO L87 Difference]: Start difference. First operand 29 states and 34 transitions. Second operand has 17 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:32:08,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:32:08,415 INFO L93 Difference]: Finished difference Result 56 states and 66 transitions. [2021-11-23 03:32:08,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-23 03:32:08,416 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-11-23 03:32:08,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:32:08,417 INFO L225 Difference]: With dead ends: 56 [2021-11-23 03:32:08,417 INFO L226 Difference]: Without dead ends: 56 [2021-11-23 03:32:08,418 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 229 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=158, Invalid=898, Unknown=0, NotChecked=0, Total=1056 [2021-11-23 03:32:08,418 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 162 mSDsluCounter, 85 mSDsCounter, 0 mSdLazyCounter, 186 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 162 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 204 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 186 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-23 03:32:08,419 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [162 Valid, 78 Invalid, 204 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 186 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-23 03:32:08,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2021-11-23 03:32:08,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 32. [2021-11-23 03:32:08,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 28 states have (on average 1.3928571428571428) internal successors, (39), 31 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:32:08,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 39 transitions. [2021-11-23 03:32:08,423 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 39 transitions. Word has length 11 [2021-11-23 03:32:08,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:32:08,423 INFO L470 AbstractCegarLoop]: Abstraction has 32 states and 39 transitions. [2021-11-23 03:32:08,423 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:32:08,423 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 39 transitions. [2021-11-23 03:32:08,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-11-23 03:32:08,424 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:32:08,424 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:32:08,471 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21a6edcb-af60-4a32-bb46-6fb8d4eccf94/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-23 03:32:08,624 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21a6edcb-af60-4a32-bb46-6fb8d4eccf94/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:32:08,625 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 7 more)] === [2021-11-23 03:32:08,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:32:08,625 INFO L85 PathProgramCache]: Analyzing trace with hash -1657608132, now seen corresponding path program 1 times [2021-11-23 03:32:08,625 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:32:08,626 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [727370225] [2021-11-23 03:32:08,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:32:08,626 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:32:08,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:32:08,725 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:32:08,725 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:32:08,725 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [727370225] [2021-11-23 03:32:08,725 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [727370225] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:32:08,726 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:32:08,726 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-23 03:32:08,728 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [863404919] [2021-11-23 03:32:08,728 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:32:08,729 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 03:32:08,729 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:32:08,729 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 03:32:08,729 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-23 03:32:08,730 INFO L87 Difference]: Start difference. First operand 32 states and 39 transitions. Second operand has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:32:08,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:32:08,752 INFO L93 Difference]: Finished difference Result 31 states and 38 transitions. [2021-11-23 03:32:08,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 03:32:08,753 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-11-23 03:32:08,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:32:08,754 INFO L225 Difference]: With dead ends: 31 [2021-11-23 03:32:08,754 INFO L226 Difference]: Without dead ends: 29 [2021-11-23 03:32:08,754 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-23 03:32:08,755 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 9 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 03:32:08,756 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 20 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 03:32:08,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2021-11-23 03:32:08,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2021-11-23 03:32:08,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 26 states have (on average 1.2692307692307692) internal successors, (33), 28 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:32:08,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 33 transitions. [2021-11-23 03:32:08,761 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 33 transitions. Word has length 11 [2021-11-23 03:32:08,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:32:08,761 INFO L470 AbstractCegarLoop]: Abstraction has 29 states and 33 transitions. [2021-11-23 03:32:08,761 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:32:08,761 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 33 transitions. [2021-11-23 03:32:08,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-11-23 03:32:08,762 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:32:08,762 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:32:08,763 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-11-23 03:32:08,763 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 7 more)] === [2021-11-23 03:32:08,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:32:08,763 INFO L85 PathProgramCache]: Analyzing trace with hash 1459202557, now seen corresponding path program 1 times [2021-11-23 03:32:08,764 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:32:08,764 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1494072510] [2021-11-23 03:32:08,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:32:08,764 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:32:08,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:32:08,902 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 03:32:08,902 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:32:08,903 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1494072510] [2021-11-23 03:32:08,903 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1494072510] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 03:32:08,903 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2042754270] [2021-11-23 03:32:08,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:32:08,903 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:32:08,904 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21a6edcb-af60-4a32-bb46-6fb8d4eccf94/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:32:08,909 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21a6edcb-af60-4a32-bb46-6fb8d4eccf94/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:32:08,915 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21a6edcb-af60-4a32-bb46-6fb8d4eccf94/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-23 03:32:08,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:32:08,984 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 35 conjunts are in the unsatisfiable core [2021-11-23 03:32:08,987 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:32:09,012 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-23 03:32:09,013 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 19 [2021-11-23 03:32:09,018 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2021-11-23 03:32:09,173 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 03:32:09,174 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:32:09,368 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 03:32:09,368 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2042754270] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 03:32:09,368 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1409724252] [2021-11-23 03:32:09,371 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2021-11-23 03:32:09,371 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 03:32:09,371 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 03:32:09,371 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 03:32:09,372 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 03:32:09,397 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:32:09,399 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2021-11-23 03:32:09,473 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-11-23 03:32:09,517 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2021-11-23 03:32:09,556 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2021-11-23 03:32:09,622 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-11-23 03:32:09,734 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:32:09,737 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:32:09,762 INFO L354 Elim1Store]: treesize reduction 60, result has 23.1 percent of original size [2021-11-23 03:32:09,763 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 29 treesize of output 31 [2021-11-23 03:32:09,930 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-23 03:32:09,930 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 18 [2021-11-23 03:32:10,114 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-23 03:32:10,115 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 18 [2021-11-23 03:32:10,217 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 03:32:11,332 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1133#(and (= |ULTIMATE.start_cstrncpy_#t~mem5#1| (select (select |#memory_int| |ULTIMATE.start_cstrncpy_#t~post4#1.base|) |ULTIMATE.start_cstrncpy_#t~post4#1.offset|)) (<= |ULTIMATE.start_main_~length~0#1| 2147483647) (<= |ULTIMATE.start_main_~n~0#1| 2147483647) (<= |ULTIMATE.start_cstrncpy_#in~n#1| 2147483647) (<= 0 |ULTIMATE.start_cstrncpy_#t~post4#1.base|) (<= 0 |ULTIMATE.start_cstrncpy_~s2#1.base|) (<= 0 |ULTIMATE.start_cstrncpy_#in~s1#1.base|) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.offset|) (<= 0 |ULTIMATE.start_cstrncpy_~src~0#1.base|) (<= 0 |ULTIMATE.start_cstrncpy_#in~s2#1.offset|) (<= 0 |ULTIMATE.start_main_#t~malloc10#1.base|) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.base|) (<= 0 |ULTIMATE.start_cstrncpy_#t~post3#1.base|) (< (select |#length| |ULTIMATE.start_cstrncpy_#t~post3#1.base|) (+ |ULTIMATE.start_cstrncpy_#t~post3#1.offset| 1)) (<= 0 |ULTIMATE.start_cstrncpy_~s1#1.offset|) (<= 1 |ULTIMATE.start_cstrncpy_#in~n#1|) (<= 0 |ULTIMATE.start_cstrncpy_~s1#1.base|) (<= |ULTIMATE.start_main_~nondetString~0#1.offset| 0) (<= 1 |ULTIMATE.start_cstrncpy_~src~0#1.offset|) (<= 0 |ULTIMATE.start_cstrncpy_#t~post4#1.offset|) (<= 0 |ULTIMATE.start_main_#t~malloc11#1.base|) (<= 1 |ULTIMATE.start_cstrncpy_~dst~0#1.offset|) (<= |ULTIMATE.start_cstrncpy_~s1#1.offset| 0) (<= 0 |ULTIMATE.start_cstrncpy_#in~s2#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString~0#1.base|) (<= (+ |ULTIMATE.start_cstrncpy_#t~post4#1.offset| 1) (select |#length| |ULTIMATE.start_cstrncpy_#t~post4#1.base|)) (<= 0 |ULTIMATE.start_cstrncpy_~s2#1.offset|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_cstrncpy_#t~post3#1.offset|) (<= 0 |ULTIMATE.start_main_~nondetString~0#1.offset|) (<= 0 |ULTIMATE.start_cstrncpy_#in~s1#1.offset|) (<= 1 |ULTIMATE.start_main_~n~0#1|) (<= |ULTIMATE.start_cstrncpy_#in~s2#1.offset| 0) (<= 1 |ULTIMATE.start_main_~length~0#1|) (<= |ULTIMATE.start_cstrncpy_#in~s1#1.offset| 0) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_cstrncpy_~dst~0#1.base|) (= |ULTIMATE.start_main_#t~malloc11#1.offset| 0) (= (select |#valid| |ULTIMATE.start_cstrncpy_#t~post4#1.base|) 1) (<= |ULTIMATE.start_cstrncpy_~s2#1.offset| 0) (<= |ULTIMATE.start_cstrncpy_~n#1| 2147483646) (<= |ULTIMATE.start_main_~nondetArea~0#1.offset| 0) (<= 0 |#StackHeapBarrier|) (= |ULTIMATE.start_main_#t~malloc10#1.offset| 0) (= |#NULL.base| 0))' at error location [2021-11-23 03:32:11,332 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-23 03:32:11,332 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 03:32:11,332 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 15 [2021-11-23 03:32:11,333 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1132166485] [2021-11-23 03:32:11,333 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 03:32:11,333 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-11-23 03:32:11,334 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:32:11,334 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-11-23 03:32:11,334 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=511, Unknown=0, NotChecked=0, Total=600 [2021-11-23 03:32:11,335 INFO L87 Difference]: Start difference. First operand 29 states and 33 transitions. Second operand has 17 states, 16 states have (on average 2.25) internal successors, (36), 16 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:32:11,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:32:11,598 INFO L93 Difference]: Finished difference Result 37 states and 42 transitions. [2021-11-23 03:32:11,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-23 03:32:11,598 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 2.25) internal successors, (36), 16 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-11-23 03:32:11,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:32:11,599 INFO L225 Difference]: With dead ends: 37 [2021-11-23 03:32:11,599 INFO L226 Difference]: Without dead ends: 37 [2021-11-23 03:32:11,600 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 185 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=160, Invalid=770, Unknown=0, NotChecked=0, Total=930 [2021-11-23 03:32:11,601 INFO L933 BasicCegarLoop]: 5 mSDtfsCounter, 78 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 95 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 125 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 95 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 03:32:11,601 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [78 Valid, 25 Invalid, 125 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 95 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 03:32:11,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2021-11-23 03:32:11,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 28. [2021-11-23 03:32:11,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 26 states have (on average 1.2307692307692308) internal successors, (32), 27 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:32:11,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 32 transitions. [2021-11-23 03:32:11,603 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 32 transitions. Word has length 12 [2021-11-23 03:32:11,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:32:11,604 INFO L470 AbstractCegarLoop]: Abstraction has 28 states and 32 transitions. [2021-11-23 03:32:11,604 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 2.25) internal successors, (36), 16 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:32:11,604 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 32 transitions. [2021-11-23 03:32:11,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-11-23 03:32:11,604 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:32:11,605 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:32:11,633 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21a6edcb-af60-4a32-bb46-6fb8d4eccf94/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-23 03:32:11,805 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21a6edcb-af60-4a32-bb46-6fb8d4eccf94/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-11-23 03:32:11,805 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 7 more)] === [2021-11-23 03:32:11,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:32:11,806 INFO L85 PathProgramCache]: Analyzing trace with hash 473190542, now seen corresponding path program 1 times [2021-11-23 03:32:11,806 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:32:11,806 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1335478463] [2021-11-23 03:32:11,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:32:11,806 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:32:11,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:32:12,026 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:32:12,027 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:32:12,027 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1335478463] [2021-11-23 03:32:12,027 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1335478463] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 03:32:12,027 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1492815253] [2021-11-23 03:32:12,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:32:12,027 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:32:12,027 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21a6edcb-af60-4a32-bb46-6fb8d4eccf94/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:32:12,029 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21a6edcb-af60-4a32-bb46-6fb8d4eccf94/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:32:12,034 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21a6edcb-af60-4a32-bb46-6fb8d4eccf94/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-23 03:32:12,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:32:12,094 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 58 conjunts are in the unsatisfiable core [2021-11-23 03:32:12,096 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:32:12,116 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-23 03:32:12,117 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 19 [2021-11-23 03:32:12,120 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2021-11-23 03:32:12,544 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:32:12,544 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:32:13,040 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:32:13,040 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1492815253] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 03:32:13,040 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1428309148] [2021-11-23 03:32:13,044 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2021-11-23 03:32:13,044 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 03:32:13,044 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 03:32:13,044 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 03:32:13,045 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 03:32:13,088 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:32:13,090 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2021-11-23 03:32:13,172 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-11-23 03:32:13,318 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:32:13,319 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:32:13,320 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:32:13,322 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 24 [2021-11-23 03:32:13,487 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:32:13,488 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:32:13,489 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 38 treesize of output 33 [2021-11-23 03:32:13,602 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-23 03:32:13,676 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 03:32:16,044 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1320#(and (<= |ULTIMATE.start_main_~n~0#1| 2147483647) (<= 1 |ULTIMATE.start_cstrncpy_#t~post7#1.offset|) (<= |ULTIMATE.start_cstrncpy_#in~n#1| 2147483647) (<= |ULTIMATE.start_main_~length~0#1| 1) (<= 0 |ULTIMATE.start_cstrncpy_~s2#1.base|) (= |ULTIMATE.start_main_~i~0#1| 0) (<= 0 |ULTIMATE.start_cstrncpy_#in~s1#1.base|) (= (+ |ULTIMATE.start_cstrncpy_#t~post7#1.offset| 1) |ULTIMATE.start_cstrncpy_~us~0#1.offset|) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.offset|) (<= 0 |ULTIMATE.start_cstrncpy_~src~0#1.base|) (<= 0 |ULTIMATE.start_cstrncpy_#in~s2#1.offset|) (<= 0 |ULTIMATE.start_main_#t~malloc10#1.base|) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.base|) (<= 0 |ULTIMATE.start_cstrncpy_~s1#1.offset|) (<= 0 |ULTIMATE.start_cstrncpy_~n#1|) (<= 1 |ULTIMATE.start_cstrncpy_#in~n#1|) (<= 0 |ULTIMATE.start_cstrncpy_~s1#1.base|) (<= |ULTIMATE.start_main_~nondetString~0#1.offset| 0) (<= 1 |ULTIMATE.start_cstrncpy_~src~0#1.offset|) (<= 0 |ULTIMATE.start_main_#t~malloc11#1.base|) (<= 1 |ULTIMATE.start_cstrncpy_~dst~0#1.offset|) (<= |ULTIMATE.start_cstrncpy_~n2~0#1| 2147483645) (<= |ULTIMATE.start_cstrncpy_~s1#1.offset| 0) (<= 0 |ULTIMATE.start_cstrncpy_#in~s2#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString~0#1.base|) (not (= 0 (+ |ULTIMATE.start_cstrncpy_~n2~0#1| 1))) (<= 0 |ULTIMATE.start_cstrncpy_~s2#1.offset|) (<= |ULTIMATE.start_cstrncpy_~src~0#1.offset| 1) (<= 0 |ULTIMATE.start_main_~nondetString~0#1.offset|) (<= 0 |ULTIMATE.start_cstrncpy_#t~post7#1.base|) (<= 0 |ULTIMATE.start_cstrncpy_#in~s1#1.offset|) (<= 1 |ULTIMATE.start_main_~n~0#1|) (<= |ULTIMATE.start_cstrncpy_#in~s2#1.offset| 0) (<= |ULTIMATE.start_cstrncpy_~dst~0#1.offset| 1) (<= 1 |ULTIMATE.start_main_~length~0#1|) (< (select |#length| |ULTIMATE.start_cstrncpy_#t~post7#1.base|) (+ |ULTIMATE.start_cstrncpy_#t~post7#1.offset| 1)) (<= |ULTIMATE.start_cstrncpy_#in~s1#1.offset| 0) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_cstrncpy_~dst~0#1.base|) (= |ULTIMATE.start_cstrncpy_~us~0#1.base| |ULTIMATE.start_cstrncpy_#t~post7#1.base|) (= |ULTIMATE.start_main_#t~malloc11#1.offset| 0) (<= |ULTIMATE.start_cstrncpy_~s2#1.offset| 0) (<= |ULTIMATE.start_cstrncpy_~n#1| 2147483646) (<= |ULTIMATE.start_main_~nondetArea~0#1.offset| 0) (<= 0 |#StackHeapBarrier|) (= |ULTIMATE.start_main_#t~malloc10#1.offset| 0) (= |#NULL.base| 0))' at error location [2021-11-23 03:32:16,045 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-23 03:32:16,045 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 03:32:16,045 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 28 [2021-11-23 03:32:16,045 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [465962495] [2021-11-23 03:32:16,045 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 03:32:16,046 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-11-23 03:32:16,046 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:32:16,046 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-11-23 03:32:16,047 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=167, Invalid=1393, Unknown=0, NotChecked=0, Total=1560 [2021-11-23 03:32:16,047 INFO L87 Difference]: Start difference. First operand 28 states and 32 transitions. Second operand has 30 states, 29 states have (on average 1.3448275862068966) internal successors, (39), 29 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:32:17,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:32:17,416 INFO L93 Difference]: Finished difference Result 36 states and 40 transitions. [2021-11-23 03:32:17,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-11-23 03:32:17,417 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 29 states have (on average 1.3448275862068966) internal successors, (39), 29 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-11-23 03:32:17,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:32:17,417 INFO L225 Difference]: With dead ends: 36 [2021-11-23 03:32:17,418 INFO L226 Difference]: Without dead ends: 16 [2021-11-23 03:32:17,419 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 652 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=497, Invalid=2925, Unknown=0, NotChecked=0, Total=3422 [2021-11-23 03:32:17,420 INFO L933 BasicCegarLoop]: 2 mSDtfsCounter, 53 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 222 mSolverCounterSat, 96 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 318 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 96 IncrementalHoareTripleChecker+Valid, 222 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-23 03:32:17,420 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [53 Valid, 27 Invalid, 318 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [96 Valid, 222 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-23 03:32:17,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2021-11-23 03:32:17,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2021-11-23 03:32:17,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 15 states have (on average 1.1333333333333333) internal successors, (17), 15 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:32:17,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 17 transitions. [2021-11-23 03:32:17,424 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 17 transitions. Word has length 13 [2021-11-23 03:32:17,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:32:17,424 INFO L470 AbstractCegarLoop]: Abstraction has 16 states and 17 transitions. [2021-11-23 03:32:17,424 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 29 states have (on average 1.3448275862068966) internal successors, (39), 29 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:32:17,425 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 17 transitions. [2021-11-23 03:32:17,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-11-23 03:32:17,425 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:32:17,425 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2021-11-23 03:32:17,452 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21a6edcb-af60-4a32-bb46-6fb8d4eccf94/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-23 03:32:17,630 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21a6edcb-af60-4a32-bb46-6fb8d4eccf94/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-11-23 03:32:17,630 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 7 more)] === [2021-11-23 03:32:17,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:32:17,631 INFO L85 PathProgramCache]: Analyzing trace with hash 1739384785, now seen corresponding path program 2 times [2021-11-23 03:32:17,631 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:32:17,631 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [451265967] [2021-11-23 03:32:17,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:32:17,631 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:32:17,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:32:17,920 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:32:17,920 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:32:17,920 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [451265967] [2021-11-23 03:32:17,921 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [451265967] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 03:32:17,921 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [287838324] [2021-11-23 03:32:17,921 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-23 03:32:17,921 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:32:17,921 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21a6edcb-af60-4a32-bb46-6fb8d4eccf94/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:32:17,926 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21a6edcb-af60-4a32-bb46-6fb8d4eccf94/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:32:17,942 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21a6edcb-af60-4a32-bb46-6fb8d4eccf94/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-23 03:32:18,009 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-11-23 03:32:18,010 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 03:32:18,012 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 47 conjunts are in the unsatisfiable core [2021-11-23 03:32:18,014 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:32:18,029 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-11-23 03:32:18,181 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 23 [2021-11-23 03:32:18,463 INFO L354 Elim1Store]: treesize reduction 34, result has 22.7 percent of original size [2021-11-23 03:32:18,464 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 39 [2021-11-23 03:32:18,537 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-11-23 03:32:18,546 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:32:18,546 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:32:19,149 WARN L838 $PredicateComparison]: unable to prove that (forall ((|ULTIMATE.start_cstrncpy_#t~post3#1.offset| Int) (|ULTIMATE.start_cstrncpy_#t~mem5#1| Int)) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_#t~post3#1.base| (store (select |c_#memory_int| |c_ULTIMATE.start_cstrncpy_#t~post3#1.base|) |ULTIMATE.start_cstrncpy_#t~post3#1.offset| |ULTIMATE.start_cstrncpy_#t~mem5#1|)) |c_ULTIMATE.start_cstrncpy_~src~0#1.base|) |c_ULTIMATE.start_cstrncpy_~src~0#1.offset|) 0)) is different from false [2021-11-23 03:32:19,324 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 180 treesize of output 168 [2021-11-23 03:32:19,661 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 1 not checked. [2021-11-23 03:32:19,661 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [287838324] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 03:32:19,662 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1000035368] [2021-11-23 03:32:19,666 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2021-11-23 03:32:19,667 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 03:32:19,668 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 03:32:19,668 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 03:32:19,668 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 03:32:19,706 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:32:19,710 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2021-11-23 03:32:19,752 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-11-23 03:32:19,792 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2021-11-23 03:32:19,818 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2021-11-23 03:32:19,878 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-11-23 03:32:19,969 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:32:19,972 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:32:20,000 INFO L354 Elim1Store]: treesize reduction 60, result has 23.1 percent of original size [2021-11-23 03:32:20,001 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 29 treesize of output 31 [2021-11-23 03:32:20,157 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-23 03:32:20,159 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 18 [2021-11-23 03:32:20,321 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-23 03:32:20,322 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 18 [2021-11-23 03:32:20,405 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 03:32:21,524 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1532#(and (<= |ULTIMATE.start_main_~length~0#1| 2147483647) (<= |ULTIMATE.start_main_~n~0#1| 2147483647) (<= |ULTIMATE.start_cstrncpy_#in~n#1| 2147483647) (<= 0 |ULTIMATE.start_cstrncpy_#t~post4#1.base|) (<= 0 |ULTIMATE.start_cstrncpy_~s2#1.base|) (<= 0 |ULTIMATE.start_cstrncpy_#in~s1#1.base|) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.offset|) (<= 0 |ULTIMATE.start_cstrncpy_~src~0#1.base|) (<= 0 |ULTIMATE.start_cstrncpy_#in~s2#1.offset|) (<= 0 |ULTIMATE.start_main_#t~malloc10#1.base|) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.base|) (<= 0 |ULTIMATE.start_cstrncpy_#t~post3#1.base|) (< (select |#length| |ULTIMATE.start_cstrncpy_#t~post4#1.base|) (+ |ULTIMATE.start_cstrncpy_#t~post4#1.offset| 1)) (<= 0 |ULTIMATE.start_cstrncpy_~s1#1.offset|) (<= 1 |ULTIMATE.start_cstrncpy_#in~n#1|) (<= 0 |ULTIMATE.start_cstrncpy_~s1#1.base|) (<= |ULTIMATE.start_main_~nondetString~0#1.offset| 0) (<= 1 |ULTIMATE.start_cstrncpy_~src~0#1.offset|) (<= 0 |ULTIMATE.start_cstrncpy_#t~post4#1.offset|) (<= 0 |ULTIMATE.start_main_#t~malloc11#1.base|) (<= 1 |ULTIMATE.start_cstrncpy_~dst~0#1.offset|) (<= |ULTIMATE.start_cstrncpy_~s1#1.offset| 0) (<= 0 |ULTIMATE.start_cstrncpy_#in~s2#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString~0#1.base|) (<= 0 |ULTIMATE.start_cstrncpy_~s2#1.offset|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_cstrncpy_#t~post3#1.offset|) (<= 0 |ULTIMATE.start_main_~nondetString~0#1.offset|) (<= 0 |ULTIMATE.start_cstrncpy_#in~s1#1.offset|) (<= 1 |ULTIMATE.start_main_~n~0#1|) (<= |ULTIMATE.start_cstrncpy_#in~s2#1.offset| 0) (<= 1 |ULTIMATE.start_main_~length~0#1|) (<= |ULTIMATE.start_cstrncpy_#in~s1#1.offset| 0) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_cstrncpy_~dst~0#1.base|) (= |ULTIMATE.start_main_#t~malloc11#1.offset| 0) (<= |ULTIMATE.start_cstrncpy_~s2#1.offset| 0) (<= |ULTIMATE.start_cstrncpy_~n#1| 2147483646) (<= |ULTIMATE.start_main_~nondetArea~0#1.offset| 0) (<= 0 |#StackHeapBarrier|) (= |ULTIMATE.start_main_#t~malloc10#1.offset| 0) (= |#NULL.base| 0))' at error location [2021-11-23 03:32:21,524 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-23 03:32:21,525 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 03:32:21,525 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 27 [2021-11-23 03:32:21,525 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1339660930] [2021-11-23 03:32:21,525 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 03:32:21,525 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-11-23 03:32:21,526 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:32:21,526 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-11-23 03:32:21,527 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=1070, Unknown=1, NotChecked=66, Total=1260 [2021-11-23 03:32:21,527 INFO L87 Difference]: Start difference. First operand 16 states and 17 transitions. Second operand has 28 states, 28 states have (on average 1.2142857142857142) internal successors, (34), 27 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:32:21,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:32:21,987 INFO L93 Difference]: Finished difference Result 28 states and 29 transitions. [2021-11-23 03:32:21,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-23 03:32:21,987 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.2142857142857142) internal successors, (34), 27 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-11-23 03:32:21,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:32:21,987 INFO L225 Difference]: With dead ends: 28 [2021-11-23 03:32:21,987 INFO L226 Difference]: Without dead ends: 19 [2021-11-23 03:32:21,988 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 44 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 499 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=246, Invalid=1737, Unknown=1, NotChecked=86, Total=2070 [2021-11-23 03:32:21,989 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 23 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 118 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 187 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 118 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 44 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 03:32:21,989 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 25 Invalid, 187 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 118 Invalid, 0 Unknown, 44 Unchecked, 0.1s Time] [2021-11-23 03:32:21,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2021-11-23 03:32:21,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 18. [2021-11-23 03:32:21,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 17 states have (on average 1.1176470588235294) internal successors, (19), 17 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:32:21,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2021-11-23 03:32:21,992 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 15 [2021-11-23 03:32:21,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:32:21,992 INFO L470 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2021-11-23 03:32:21,993 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.2142857142857142) internal successors, (34), 27 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:32:21,993 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2021-11-23 03:32:21,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-11-23 03:32:21,993 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:32:21,993 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1] [2021-11-23 03:32:22,021 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21a6edcb-af60-4a32-bb46-6fb8d4eccf94/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-23 03:32:22,206 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21a6edcb-af60-4a32-bb46-6fb8d4eccf94/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:32:22,206 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 7 more)] === [2021-11-23 03:32:22,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:32:22,207 INFO L85 PathProgramCache]: Analyzing trace with hash 1501246387, now seen corresponding path program 3 times [2021-11-23 03:32:22,207 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:32:22,207 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1633670445] [2021-11-23 03:32:22,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:32:22,207 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:32:22,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:32:22,368 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:32:22,368 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:32:22,368 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1633670445] [2021-11-23 03:32:22,369 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1633670445] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 03:32:22,369 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1761085932] [2021-11-23 03:32:22,369 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-23 03:32:22,369 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:32:22,369 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21a6edcb-af60-4a32-bb46-6fb8d4eccf94/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:32:22,370 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21a6edcb-af60-4a32-bb46-6fb8d4eccf94/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:32:22,392 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21a6edcb-af60-4a32-bb46-6fb8d4eccf94/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-23 03:32:22,433 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-23 03:32:22,433 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 03:32:22,434 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 38 conjunts are in the unsatisfiable core [2021-11-23 03:32:22,439 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:32:22,467 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-23 03:32:22,468 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-11-23 03:32:22,710 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:32:22,711 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:32:22,996 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:32:22,997 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1761085932] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 03:32:22,997 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [113096272] [2021-11-23 03:32:22,998 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2021-11-23 03:32:22,998 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 03:32:22,999 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 03:32:22,999 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 03:32:22,999 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 03:32:23,026 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:32:23,027 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2021-11-23 03:32:23,070 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-11-23 03:32:23,110 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2021-11-23 03:32:23,134 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2021-11-23 03:32:23,193 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-11-23 03:32:23,290 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:32:23,292 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:32:23,324 INFO L354 Elim1Store]: treesize reduction 60, result has 23.1 percent of original size [2021-11-23 03:32:23,324 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 29 treesize of output 31 [2021-11-23 03:32:23,469 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-23 03:32:23,470 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 18 [2021-11-23 03:32:23,626 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-23 03:32:23,626 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 18 [2021-11-23 03:32:23,711 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 03:32:24,761 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1729#(and (<= |ULTIMATE.start_main_~length~0#1| 2147483647) (<= |ULTIMATE.start_main_~n~0#1| 2147483647) (<= |ULTIMATE.start_cstrncpy_#in~n#1| 2147483647) (<= 0 |ULTIMATE.start_cstrncpy_#t~post4#1.base|) (<= 0 |ULTIMATE.start_cstrncpy_~s2#1.base|) (<= 0 |ULTIMATE.start_cstrncpy_#in~s1#1.base|) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.offset|) (<= 0 |ULTIMATE.start_cstrncpy_~src~0#1.base|) (<= 0 |ULTIMATE.start_cstrncpy_#in~s2#1.offset|) (<= 0 |ULTIMATE.start_main_#t~malloc10#1.base|) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.base|) (<= 0 |ULTIMATE.start_cstrncpy_#t~post3#1.base|) (< (select |#length| |ULTIMATE.start_cstrncpy_#t~post4#1.base|) (+ |ULTIMATE.start_cstrncpy_#t~post4#1.offset| 1)) (<= 0 |ULTIMATE.start_cstrncpy_~s1#1.offset|) (<= 1 |ULTIMATE.start_cstrncpy_#in~n#1|) (<= 0 |ULTIMATE.start_cstrncpy_~s1#1.base|) (<= |ULTIMATE.start_main_~nondetString~0#1.offset| 0) (<= 1 |ULTIMATE.start_cstrncpy_~src~0#1.offset|) (<= 0 |ULTIMATE.start_cstrncpy_#t~post4#1.offset|) (<= 0 |ULTIMATE.start_main_#t~malloc11#1.base|) (<= 1 |ULTIMATE.start_cstrncpy_~dst~0#1.offset|) (<= |ULTIMATE.start_cstrncpy_~s1#1.offset| 0) (<= 0 |ULTIMATE.start_cstrncpy_#in~s2#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString~0#1.base|) (<= 0 |ULTIMATE.start_cstrncpy_~s2#1.offset|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_cstrncpy_#t~post3#1.offset|) (<= 0 |ULTIMATE.start_main_~nondetString~0#1.offset|) (<= 0 |ULTIMATE.start_cstrncpy_#in~s1#1.offset|) (<= 1 |ULTIMATE.start_main_~n~0#1|) (<= |ULTIMATE.start_cstrncpy_#in~s2#1.offset| 0) (<= 1 |ULTIMATE.start_main_~length~0#1|) (<= |ULTIMATE.start_cstrncpy_#in~s1#1.offset| 0) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_cstrncpy_~dst~0#1.base|) (= |ULTIMATE.start_main_#t~malloc11#1.offset| 0) (<= |ULTIMATE.start_cstrncpy_~s2#1.offset| 0) (<= |ULTIMATE.start_cstrncpy_~n#1| 2147483646) (<= |ULTIMATE.start_main_~nondetArea~0#1.offset| 0) (<= 0 |#StackHeapBarrier|) (= |ULTIMATE.start_main_#t~malloc10#1.offset| 0) (= |#NULL.base| 0))' at error location [2021-11-23 03:32:24,762 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-23 03:32:24,762 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 03:32:24,762 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 24 [2021-11-23 03:32:24,762 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1501092154] [2021-11-23 03:32:24,762 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 03:32:24,763 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-11-23 03:32:24,763 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:32:24,763 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-11-23 03:32:24,764 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=993, Unknown=0, NotChecked=0, Total=1122 [2021-11-23 03:32:24,764 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand has 26 states, 25 states have (on average 2.04) internal successors, (51), 25 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:32:25,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:32:25,140 INFO L93 Difference]: Finished difference Result 24 states and 25 transitions. [2021-11-23 03:32:25,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-23 03:32:25,140 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 2.04) internal successors, (51), 25 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-11-23 03:32:25,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:32:25,141 INFO L225 Difference]: With dead ends: 24 [2021-11-23 03:32:25,141 INFO L226 Difference]: Without dead ends: 24 [2021-11-23 03:32:25,142 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 367 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=251, Invalid=1471, Unknown=0, NotChecked=0, Total=1722 [2021-11-23 03:32:25,143 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 94 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 202 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 227 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 202 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 03:32:25,144 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [94 Valid, 21 Invalid, 227 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 202 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 03:32:25,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2021-11-23 03:32:25,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 22. [2021-11-23 03:32:25,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 21 states have (on average 1.0952380952380953) internal successors, (23), 21 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:32:25,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 23 transitions. [2021-11-23 03:32:25,146 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 23 transitions. Word has length 17 [2021-11-23 03:32:25,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:32:25,146 INFO L470 AbstractCegarLoop]: Abstraction has 22 states and 23 transitions. [2021-11-23 03:32:25,146 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 25 states have (on average 2.04) internal successors, (51), 25 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:32:25,147 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 23 transitions. [2021-11-23 03:32:25,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-11-23 03:32:25,147 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:32:25,147 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 2, 2, 1, 1, 1, 1] [2021-11-23 03:32:25,186 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21a6edcb-af60-4a32-bb46-6fb8d4eccf94/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-23 03:32:25,358 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21a6edcb-af60-4a32-bb46-6fb8d4eccf94/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-11-23 03:32:25,358 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 7 more)] === [2021-11-23 03:32:25,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:32:25,358 INFO L85 PathProgramCache]: Analyzing trace with hash -58765044, now seen corresponding path program 4 times [2021-11-23 03:32:25,359 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:32:25,359 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [555166863] [2021-11-23 03:32:25,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:32:25,359 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:32:25,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:32:25,669 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 6 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:32:25,669 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:32:25,669 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [555166863] [2021-11-23 03:32:25,669 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [555166863] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 03:32:25,669 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2060767861] [2021-11-23 03:32:25,669 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-23 03:32:25,669 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:32:25,669 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21a6edcb-af60-4a32-bb46-6fb8d4eccf94/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:32:25,670 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21a6edcb-af60-4a32-bb46-6fb8d4eccf94/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:32:25,686 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21a6edcb-af60-4a32-bb46-6fb8d4eccf94/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-23 03:32:25,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:32:25,748 INFO L263 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 63 conjunts are in the unsatisfiable core [2021-11-23 03:32:25,750 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:32:25,758 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-11-23 03:32:25,928 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-11-23 03:32:26,052 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 27 [2021-11-23 03:32:26,124 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-23 03:32:26,124 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 22 [2021-11-23 03:32:26,136 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-11-23 03:32:26,147 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 6 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:32:26,148 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:32:41,408 WARN L838 $PredicateComparison]: unable to prove that (forall ((|ULTIMATE.start_cstrncpy_#t~post3#1.offset| Int) (|ULTIMATE.start_cstrncpy_#t~mem5#1| Int) (|v_ULTIMATE.start_cstrncpy_#t~post3#1.offset_51| Int) (|v_ULTIMATE.start_cstrncpy_#t~mem5#1_50| Int)) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_~dst~0#1.base| (store (store (select |c_#memory_int| |c_ULTIMATE.start_cstrncpy_~dst~0#1.base|) |ULTIMATE.start_cstrncpy_#t~post3#1.offset| |ULTIMATE.start_cstrncpy_#t~mem5#1|) |v_ULTIMATE.start_cstrncpy_#t~post3#1.offset_51| |v_ULTIMATE.start_cstrncpy_#t~mem5#1_50|)) |c_ULTIMATE.start_cstrncpy_~src~0#1.base|) (+ |c_ULTIMATE.start_cstrncpy_~src~0#1.offset| 2)) 0)) is different from false [2021-11-23 03:32:41,417 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 378 treesize of output 366 [2021-11-23 03:32:41,818 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 6 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 2 not checked. [2021-11-23 03:32:41,818 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2060767861] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 03:32:41,818 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1043178626] [2021-11-23 03:32:41,820 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2021-11-23 03:32:41,820 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 03:32:41,820 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 03:32:41,821 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 03:32:41,821 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 03:32:41,850 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:32:41,850 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2021-11-23 03:32:41,901 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-11-23 03:32:41,947 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2021-11-23 03:32:41,978 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2021-11-23 03:32:42,043 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-11-23 03:32:42,147 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:32:42,150 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:32:42,176 INFO L354 Elim1Store]: treesize reduction 60, result has 23.1 percent of original size [2021-11-23 03:32:42,176 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 29 treesize of output 31 [2021-11-23 03:32:42,330 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-23 03:32:42,331 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 18 [2021-11-23 03:32:42,514 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-23 03:32:42,514 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 18 [2021-11-23 03:32:42,597 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 03:32:43,732 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1949#(and (<= |ULTIMATE.start_main_~length~0#1| 2147483647) (<= |ULTIMATE.start_main_~n~0#1| 2147483647) (<= |ULTIMATE.start_cstrncpy_#in~n#1| 2147483647) (<= 0 |ULTIMATE.start_cstrncpy_#t~post4#1.base|) (<= 0 |ULTIMATE.start_cstrncpy_~s2#1.base|) (<= 0 |ULTIMATE.start_cstrncpy_#in~s1#1.base|) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.offset|) (<= 0 |ULTIMATE.start_cstrncpy_~src~0#1.base|) (<= 0 |ULTIMATE.start_cstrncpy_#in~s2#1.offset|) (<= 0 |ULTIMATE.start_main_#t~malloc10#1.base|) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.base|) (<= 0 |ULTIMATE.start_cstrncpy_#t~post3#1.base|) (< (select |#length| |ULTIMATE.start_cstrncpy_#t~post4#1.base|) (+ |ULTIMATE.start_cstrncpy_#t~post4#1.offset| 1)) (<= 0 |ULTIMATE.start_cstrncpy_~s1#1.offset|) (<= 1 |ULTIMATE.start_cstrncpy_#in~n#1|) (<= 0 |ULTIMATE.start_cstrncpy_~s1#1.base|) (<= |ULTIMATE.start_main_~nondetString~0#1.offset| 0) (<= 1 |ULTIMATE.start_cstrncpy_~src~0#1.offset|) (<= 0 |ULTIMATE.start_cstrncpy_#t~post4#1.offset|) (<= 0 |ULTIMATE.start_main_#t~malloc11#1.base|) (<= 1 |ULTIMATE.start_cstrncpy_~dst~0#1.offset|) (<= |ULTIMATE.start_cstrncpy_~s1#1.offset| 0) (<= 0 |ULTIMATE.start_cstrncpy_#in~s2#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString~0#1.base|) (<= 0 |ULTIMATE.start_cstrncpy_~s2#1.offset|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_cstrncpy_#t~post3#1.offset|) (<= 0 |ULTIMATE.start_main_~nondetString~0#1.offset|) (<= 0 |ULTIMATE.start_cstrncpy_#in~s1#1.offset|) (<= 1 |ULTIMATE.start_main_~n~0#1|) (<= |ULTIMATE.start_cstrncpy_#in~s2#1.offset| 0) (<= 1 |ULTIMATE.start_main_~length~0#1|) (<= |ULTIMATE.start_cstrncpy_#in~s1#1.offset| 0) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_cstrncpy_~dst~0#1.base|) (= |ULTIMATE.start_main_#t~malloc11#1.offset| 0) (<= |ULTIMATE.start_cstrncpy_~s2#1.offset| 0) (<= |ULTIMATE.start_cstrncpy_~n#1| 2147483646) (<= |ULTIMATE.start_main_~nondetArea~0#1.offset| 0) (<= 0 |#StackHeapBarrier|) (= |ULTIMATE.start_main_#t~malloc10#1.offset| 0) (= |#NULL.base| 0))' at error location [2021-11-23 03:32:43,732 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-23 03:32:43,732 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 03:32:43,733 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13, 13] total 29 [2021-11-23 03:32:43,733 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [899769408] [2021-11-23 03:32:43,733 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 03:32:43,734 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-11-23 03:32:43,734 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:32:43,734 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-11-23 03:32:43,735 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=1193, Unknown=17, NotChecked=70, Total=1406 [2021-11-23 03:32:43,735 INFO L87 Difference]: Start difference. First operand 22 states and 23 transitions. Second operand has 30 states, 30 states have (on average 1.5) internal successors, (45), 29 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:32:44,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:32:44,258 INFO L93 Difference]: Finished difference Result 38 states and 39 transitions. [2021-11-23 03:32:44,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-23 03:32:44,259 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.5) internal successors, (45), 29 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-11-23 03:32:44,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:32:44,259 INFO L225 Difference]: With dead ends: 38 [2021-11-23 03:32:44,260 INFO L226 Difference]: Without dead ends: 25 [2021-11-23 03:32:44,261 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 37 SyntacticMatches, 3 SemanticMatches, 47 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 533 ImplicationChecksByTransitivity, 17.1s TimeCoverageRelationStatistics Valid=248, Invalid=1995, Unknown=17, NotChecked=92, Total=2352 [2021-11-23 03:32:44,261 INFO L933 BasicCegarLoop]: 2 mSDtfsCounter, 29 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 251 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 375 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 251 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 84 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-23 03:32:44,262 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 42 Invalid, 375 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 251 Invalid, 0 Unknown, 84 Unchecked, 0.2s Time] [2021-11-23 03:32:44,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2021-11-23 03:32:44,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 24. [2021-11-23 03:32:44,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 23 states have (on average 1.0869565217391304) internal successors, (25), 23 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:32:44,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2021-11-23 03:32:44,264 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 21 [2021-11-23 03:32:44,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:32:44,264 INFO L470 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2021-11-23 03:32:44,264 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.5) internal successors, (45), 29 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:32:44,264 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2021-11-23 03:32:44,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-11-23 03:32:44,265 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:32:44,265 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 1, 1, 1, 1] [2021-11-23 03:32:44,311 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21a6edcb-af60-4a32-bb46-6fb8d4eccf94/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-23 03:32:44,478 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21a6edcb-af60-4a32-bb46-6fb8d4eccf94/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:32:44,478 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 7 more)] === [2021-11-23 03:32:44,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:32:44,478 INFO L85 PathProgramCache]: Analyzing trace with hash 40479598, now seen corresponding path program 5 times [2021-11-23 03:32:44,479 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:32:44,479 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1663222849] [2021-11-23 03:32:44,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:32:44,479 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:32:44,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:32:44,663 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 1 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:32:44,663 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:32:44,663 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1663222849] [2021-11-23 03:32:44,664 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1663222849] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 03:32:44,664 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1194282433] [2021-11-23 03:32:44,664 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-23 03:32:44,664 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:32:44,664 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21a6edcb-af60-4a32-bb46-6fb8d4eccf94/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:32:44,665 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21a6edcb-af60-4a32-bb46-6fb8d4eccf94/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:32:44,666 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21a6edcb-af60-4a32-bb46-6fb8d4eccf94/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-23 03:32:44,736 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-11-23 03:32:44,736 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 03:32:44,738 INFO L263 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 43 conjunts are in the unsatisfiable core [2021-11-23 03:32:44,740 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:32:44,764 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-23 03:32:44,764 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-11-23 03:32:45,091 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 4 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:32:45,091 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:32:45,490 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 9 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:32:45,490 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1194282433] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 03:32:45,491 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [933587379] [2021-11-23 03:32:45,492 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2021-11-23 03:32:45,492 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 03:32:45,493 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 03:32:45,493 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 03:32:45,493 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 03:32:45,530 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:32:45,531 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2021-11-23 03:32:45,583 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-11-23 03:32:45,623 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2021-11-23 03:32:45,645 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2021-11-23 03:32:45,722 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-11-23 03:32:45,839 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:32:45,842 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:32:45,870 INFO L354 Elim1Store]: treesize reduction 60, result has 23.1 percent of original size [2021-11-23 03:32:45,871 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 29 treesize of output 31 [2021-11-23 03:32:46,019 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-23 03:32:46,020 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 18 [2021-11-23 03:32:46,243 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-23 03:32:46,243 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 18 [2021-11-23 03:32:46,364 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 03:32:47,994 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2205#(and (<= |ULTIMATE.start_main_~length~0#1| 2147483647) (<= |ULTIMATE.start_main_~n~0#1| 2147483647) (<= |ULTIMATE.start_cstrncpy_#in~n#1| 2147483647) (<= 0 |ULTIMATE.start_cstrncpy_#t~post4#1.base|) (<= 0 |ULTIMATE.start_cstrncpy_~s2#1.base|) (<= 0 |ULTIMATE.start_cstrncpy_#in~s1#1.base|) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.offset|) (<= 0 |ULTIMATE.start_cstrncpy_~src~0#1.base|) (<= 0 |ULTIMATE.start_cstrncpy_#in~s2#1.offset|) (<= 0 |ULTIMATE.start_main_#t~malloc10#1.base|) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.base|) (<= 0 |ULTIMATE.start_cstrncpy_#t~post3#1.base|) (< (select |#length| |ULTIMATE.start_cstrncpy_#t~post4#1.base|) (+ |ULTIMATE.start_cstrncpy_#t~post4#1.offset| 1)) (<= 0 |ULTIMATE.start_cstrncpy_~s1#1.offset|) (<= 1 |ULTIMATE.start_cstrncpy_#in~n#1|) (<= 0 |ULTIMATE.start_cstrncpy_~s1#1.base|) (<= |ULTIMATE.start_main_~nondetString~0#1.offset| 0) (<= 1 |ULTIMATE.start_cstrncpy_~src~0#1.offset|) (<= 0 |ULTIMATE.start_cstrncpy_#t~post4#1.offset|) (<= 0 |ULTIMATE.start_main_#t~malloc11#1.base|) (<= 1 |ULTIMATE.start_cstrncpy_~dst~0#1.offset|) (<= |ULTIMATE.start_cstrncpy_~s1#1.offset| 0) (<= 0 |ULTIMATE.start_cstrncpy_#in~s2#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString~0#1.base|) (<= 0 |ULTIMATE.start_cstrncpy_~s2#1.offset|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_cstrncpy_#t~post3#1.offset|) (<= 0 |ULTIMATE.start_main_~nondetString~0#1.offset|) (<= 0 |ULTIMATE.start_cstrncpy_#in~s1#1.offset|) (<= 1 |ULTIMATE.start_main_~n~0#1|) (<= |ULTIMATE.start_cstrncpy_#in~s2#1.offset| 0) (<= 1 |ULTIMATE.start_main_~length~0#1|) (<= |ULTIMATE.start_cstrncpy_#in~s1#1.offset| 0) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_cstrncpy_~dst~0#1.base|) (= |ULTIMATE.start_main_#t~malloc11#1.offset| 0) (<= |ULTIMATE.start_cstrncpy_~s2#1.offset| 0) (<= |ULTIMATE.start_cstrncpy_~n#1| 2147483646) (<= |ULTIMATE.start_main_~nondetArea~0#1.offset| 0) (<= 0 |#StackHeapBarrier|) (= |ULTIMATE.start_main_#t~malloc10#1.offset| 0) (= |#NULL.base| 0))' at error location [2021-11-23 03:32:47,994 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-23 03:32:47,994 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 03:32:47,994 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 30 [2021-11-23 03:32:47,994 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1557432884] [2021-11-23 03:32:47,994 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 03:32:47,995 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-11-23 03:32:47,995 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:32:47,995 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-11-23 03:32:47,996 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=1386, Unknown=0, NotChecked=0, Total=1560 [2021-11-23 03:32:47,996 INFO L87 Difference]: Start difference. First operand 24 states and 25 transitions. Second operand has 32 states, 31 states have (on average 2.225806451612903) internal successors, (69), 31 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:32:48,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:32:48,486 INFO L93 Difference]: Finished difference Result 30 states and 31 transitions. [2021-11-23 03:32:48,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-23 03:32:48,486 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 31 states have (on average 2.225806451612903) internal successors, (69), 31 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-11-23 03:32:48,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:32:48,487 INFO L225 Difference]: With dead ends: 30 [2021-11-23 03:32:48,487 INFO L226 Difference]: Without dead ends: 30 [2021-11-23 03:32:48,488 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 528 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=378, Invalid=2072, Unknown=0, NotChecked=0, Total=2450 [2021-11-23 03:32:48,489 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 98 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 198 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 231 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 198 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 03:32:48,490 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [98 Valid, 19 Invalid, 231 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 198 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 03:32:48,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2021-11-23 03:32:48,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 28. [2021-11-23 03:32:48,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 27 states have (on average 1.0740740740740742) internal successors, (29), 27 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:32:48,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 29 transitions. [2021-11-23 03:32:48,492 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 29 transitions. Word has length 23 [2021-11-23 03:32:48,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:32:48,493 INFO L470 AbstractCegarLoop]: Abstraction has 28 states and 29 transitions. [2021-11-23 03:32:48,493 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 31 states have (on average 2.225806451612903) internal successors, (69), 31 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:32:48,493 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 29 transitions. [2021-11-23 03:32:48,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-11-23 03:32:48,494 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:32:48,494 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 3, 3, 1, 1, 1, 1] [2021-11-23 03:32:48,534 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21a6edcb-af60-4a32-bb46-6fb8d4eccf94/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-11-23 03:32:48,714 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21a6edcb-af60-4a32-bb46-6fb8d4eccf94/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:32:48,714 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 7 more)] === [2021-11-23 03:32:48,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:32:48,715 INFO L85 PathProgramCache]: Analyzing trace with hash 363164487, now seen corresponding path program 6 times [2021-11-23 03:32:48,715 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:32:48,715 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1126819903] [2021-11-23 03:32:48,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:32:48,715 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:32:48,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:32:49,101 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 8 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:32:49,101 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:32:49,101 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1126819903] [2021-11-23 03:32:49,102 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1126819903] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 03:32:49,102 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [827172550] [2021-11-23 03:32:49,102 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-23 03:32:49,102 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:32:49,102 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21a6edcb-af60-4a32-bb46-6fb8d4eccf94/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:32:49,106 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21a6edcb-af60-4a32-bb46-6fb8d4eccf94/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:32:49,113 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21a6edcb-af60-4a32-bb46-6fb8d4eccf94/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-23 03:32:49,194 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-23 03:32:49,194 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 03:32:49,198 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 86 conjunts are in the unsatisfiable core [2021-11-23 03:32:49,201 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:32:49,426 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-11-23 03:32:49,620 INFO L354 Elim1Store]: treesize reduction 34, result has 22.7 percent of original size [2021-11-23 03:32:49,620 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 35 [2021-11-23 03:32:49,816 INFO L354 Elim1Store]: treesize reduction 34, result has 22.7 percent of original size [2021-11-23 03:32:49,817 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 35 [2021-11-23 03:32:50,007 INFO L354 Elim1Store]: treesize reduction 34, result has 22.7 percent of original size [2021-11-23 03:32:50,007 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 30 [2021-11-23 03:32:50,164 INFO L354 Elim1Store]: treesize reduction 8, result has 27.3 percent of original size [2021-11-23 03:32:50,164 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 19 [2021-11-23 03:32:50,173 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 8 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:32:50,173 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:34:25,408 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 49399 treesize of output 48631 [2021-11-23 03:34:27,031 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: BigInteger out of long range [2021-11-23 03:34:27,032 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [773763209] [2021-11-23 03:34:27,034 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2021-11-23 03:34:27,034 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 03:34:27,034 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 03:34:27,034 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 03:34:27,035 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 03:34:27,061 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:34:27,062 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2021-11-23 03:34:27,120 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2021-11-23 03:34:27,159 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2021-11-23 03:34:27,191 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2021-11-23 03:34:27,253 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-11-23 03:34:27,374 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:34:27,379 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:34:27,432 INFO L354 Elim1Store]: treesize reduction 60, result has 23.1 percent of original size [2021-11-23 03:34:27,432 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 29 treesize of output 31 [2021-11-23 03:34:27,595 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-23 03:34:27,595 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 18 [2021-11-23 03:34:27,800 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-23 03:34:27,801 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 18 [2021-11-23 03:34:27,899 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 03:34:29,785 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2465#(and (<= |ULTIMATE.start_main_~length~0#1| 2147483647) (<= |ULTIMATE.start_main_~n~0#1| 2147483647) (<= |ULTIMATE.start_cstrncpy_#in~n#1| 2147483647) (<= 0 |ULTIMATE.start_cstrncpy_#t~post4#1.base|) (<= 0 |ULTIMATE.start_cstrncpy_~s2#1.base|) (<= 0 |ULTIMATE.start_cstrncpy_#in~s1#1.base|) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.offset|) (<= 0 |ULTIMATE.start_cstrncpy_~src~0#1.base|) (<= 0 |ULTIMATE.start_cstrncpy_#in~s2#1.offset|) (<= 0 |ULTIMATE.start_main_#t~malloc10#1.base|) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.base|) (<= 0 |ULTIMATE.start_cstrncpy_#t~post3#1.base|) (< (select |#length| |ULTIMATE.start_cstrncpy_#t~post4#1.base|) (+ |ULTIMATE.start_cstrncpy_#t~post4#1.offset| 1)) (<= 0 |ULTIMATE.start_cstrncpy_~s1#1.offset|) (<= 1 |ULTIMATE.start_cstrncpy_#in~n#1|) (<= 0 |ULTIMATE.start_cstrncpy_~s1#1.base|) (<= |ULTIMATE.start_main_~nondetString~0#1.offset| 0) (<= 1 |ULTIMATE.start_cstrncpy_~src~0#1.offset|) (<= 0 |ULTIMATE.start_cstrncpy_#t~post4#1.offset|) (<= 0 |ULTIMATE.start_main_#t~malloc11#1.base|) (<= 1 |ULTIMATE.start_cstrncpy_~dst~0#1.offset|) (<= |ULTIMATE.start_cstrncpy_~s1#1.offset| 0) (<= 0 |ULTIMATE.start_cstrncpy_#in~s2#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString~0#1.base|) (<= 0 |ULTIMATE.start_cstrncpy_~s2#1.offset|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_cstrncpy_#t~post3#1.offset|) (<= 0 |ULTIMATE.start_main_~nondetString~0#1.offset|) (<= 0 |ULTIMATE.start_cstrncpy_#in~s1#1.offset|) (<= 1 |ULTIMATE.start_main_~n~0#1|) (<= |ULTIMATE.start_cstrncpy_#in~s2#1.offset| 0) (<= 1 |ULTIMATE.start_main_~length~0#1|) (<= |ULTIMATE.start_cstrncpy_#in~s1#1.offset| 0) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_cstrncpy_~dst~0#1.base|) (= |ULTIMATE.start_main_#t~malloc11#1.offset| 0) (<= |ULTIMATE.start_cstrncpy_~s2#1.offset| 0) (<= |ULTIMATE.start_cstrncpy_~n#1| 2147483646) (<= |ULTIMATE.start_main_~nondetArea~0#1.offset| 0) (<= 0 |#StackHeapBarrier|) (= |ULTIMATE.start_main_#t~malloc10#1.offset| 0) (= |#NULL.base| 0))' at error location [2021-11-23 03:34:29,785 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-23 03:34:29,785 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-11-23 03:34:29,785 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2021-11-23 03:34:29,785 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1967262654] [2021-11-23 03:34:29,785 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-11-23 03:34:29,785 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-11-23 03:34:29,786 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:34:29,786 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-11-23 03:34:29,787 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=2075, Unknown=39, NotChecked=0, Total=2256 [2021-11-23 03:34:29,787 INFO L87 Difference]: Start difference. First operand 28 states and 29 transitions. Second operand has 20 states, 20 states have (on average 1.35) internal successors, (27), 19 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:34:30,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:34:30,743 INFO L93 Difference]: Finished difference Result 48 states and 49 transitions. [2021-11-23 03:34:30,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-23 03:34:30,744 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.35) internal successors, (27), 19 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-11-23 03:34:30,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:34:30,745 INFO L225 Difference]: With dead ends: 48 [2021-11-23 03:34:30,745 INFO L226 Difference]: Without dead ends: 31 [2021-11-23 03:34:30,746 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 609 ImplicationChecksByTransitivity, 98.2s TimeCoverageRelationStatistics Valid=224, Invalid=3159, Unknown=39, NotChecked=0, Total=3422 [2021-11-23 03:34:30,747 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 25 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 318 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 348 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 318 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-23 03:34:30,747 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [25 Valid, 48 Invalid, 348 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 318 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-23 03:34:30,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2021-11-23 03:34:30,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 30. [2021-11-23 03:34:30,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 29 states have (on average 1.0689655172413792) internal successors, (31), 29 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:34:30,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 31 transitions. [2021-11-23 03:34:30,749 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 31 transitions. Word has length 27 [2021-11-23 03:34:30,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:34:30,749 INFO L470 AbstractCegarLoop]: Abstraction has 30 states and 31 transitions. [2021-11-23 03:34:30,755 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.35) internal successors, (27), 19 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:34:30,755 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 31 transitions. [2021-11-23 03:34:30,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-11-23 03:34:30,758 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:34:30,758 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 1, 1, 1, 1] [2021-11-23 03:34:30,797 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21a6edcb-af60-4a32-bb46-6fb8d4eccf94/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-11-23 03:34:30,968 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21a6edcb-af60-4a32-bb46-6fb8d4eccf94/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:34:30,968 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 7 more)] === [2021-11-23 03:34:30,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:34:30,968 INFO L85 PathProgramCache]: Analyzing trace with hash -1257833431, now seen corresponding path program 7 times [2021-11-23 03:34:30,969 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:34:30,969 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1654405861] [2021-11-23 03:34:30,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:34:30,969 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:34:30,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:34:31,220 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 4 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:34:31,220 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:34:31,220 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1654405861] [2021-11-23 03:34:31,221 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1654405861] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 03:34:31,221 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2107572403] [2021-11-23 03:34:31,221 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-23 03:34:31,221 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:34:31,221 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21a6edcb-af60-4a32-bb46-6fb8d4eccf94/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:34:31,221 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21a6edcb-af60-4a32-bb46-6fb8d4eccf94/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:34:31,226 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21a6edcb-af60-4a32-bb46-6fb8d4eccf94/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-23 03:34:31,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:34:31,289 INFO L263 TraceCheckSpWp]: Trace formula consists of 258 conjuncts, 54 conjunts are in the unsatisfiable core [2021-11-23 03:34:31,292 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:34:31,562 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 9 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:34:31,562 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:34:31,864 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-11-23 03:34:31,906 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 9 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:34:31,906 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2107572403] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 03:34:31,906 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [790517180] [2021-11-23 03:34:31,908 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2021-11-23 03:34:31,908 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 03:34:31,908 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 03:34:31,908 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 03:34:31,909 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 03:34:31,961 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:34:31,964 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2021-11-23 03:34:32,001 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2021-11-23 03:34:32,052 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2021-11-23 03:34:32,081 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2021-11-23 03:34:32,133 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-11-23 03:34:32,246 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:34:32,250 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:34:32,300 INFO L354 Elim1Store]: treesize reduction 60, result has 23.1 percent of original size [2021-11-23 03:34:32,300 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 29 treesize of output 31 [2021-11-23 03:34:32,411 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-23 03:34:32,411 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 18 [2021-11-23 03:34:32,552 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-23 03:34:32,552 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 18 [2021-11-23 03:34:32,627 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 03:34:34,305 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2769#(and (<= |ULTIMATE.start_main_~length~0#1| 2147483647) (<= |ULTIMATE.start_main_~n~0#1| 2147483647) (<= |ULTIMATE.start_cstrncpy_#in~n#1| 2147483647) (<= 0 |ULTIMATE.start_cstrncpy_#t~post4#1.base|) (<= 0 |ULTIMATE.start_cstrncpy_~s2#1.base|) (<= 0 |ULTIMATE.start_cstrncpy_#in~s1#1.base|) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.offset|) (<= 0 |ULTIMATE.start_cstrncpy_~src~0#1.base|) (<= 0 |ULTIMATE.start_cstrncpy_#in~s2#1.offset|) (<= 0 |ULTIMATE.start_main_#t~malloc10#1.base|) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.base|) (<= 0 |ULTIMATE.start_cstrncpy_#t~post3#1.base|) (< (select |#length| |ULTIMATE.start_cstrncpy_#t~post4#1.base|) (+ |ULTIMATE.start_cstrncpy_#t~post4#1.offset| 1)) (<= 0 |ULTIMATE.start_cstrncpy_~s1#1.offset|) (<= 1 |ULTIMATE.start_cstrncpy_#in~n#1|) (<= 0 |ULTIMATE.start_cstrncpy_~s1#1.base|) (<= |ULTIMATE.start_main_~nondetString~0#1.offset| 0) (<= 1 |ULTIMATE.start_cstrncpy_~src~0#1.offset|) (<= 0 |ULTIMATE.start_cstrncpy_#t~post4#1.offset|) (<= 0 |ULTIMATE.start_main_#t~malloc11#1.base|) (<= 1 |ULTIMATE.start_cstrncpy_~dst~0#1.offset|) (<= |ULTIMATE.start_cstrncpy_~s1#1.offset| 0) (<= 0 |ULTIMATE.start_cstrncpy_#in~s2#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString~0#1.base|) (<= 0 |ULTIMATE.start_cstrncpy_~s2#1.offset|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_cstrncpy_#t~post3#1.offset|) (<= 0 |ULTIMATE.start_main_~nondetString~0#1.offset|) (<= 0 |ULTIMATE.start_cstrncpy_#in~s1#1.offset|) (<= 1 |ULTIMATE.start_main_~n~0#1|) (<= |ULTIMATE.start_cstrncpy_#in~s2#1.offset| 0) (<= 1 |ULTIMATE.start_main_~length~0#1|) (<= |ULTIMATE.start_cstrncpy_#in~s1#1.offset| 0) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_cstrncpy_~dst~0#1.base|) (= |ULTIMATE.start_main_#t~malloc11#1.offset| 0) (<= |ULTIMATE.start_cstrncpy_~s2#1.offset| 0) (<= |ULTIMATE.start_cstrncpy_~n#1| 2147483646) (<= |ULTIMATE.start_main_~nondetArea~0#1.offset| 0) (<= 0 |#StackHeapBarrier|) (= |ULTIMATE.start_main_#t~malloc10#1.offset| 0) (= |#NULL.base| 0))' at error location [2021-11-23 03:34:34,305 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-23 03:34:34,305 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 03:34:34,305 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 26 [2021-11-23 03:34:34,306 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1669094517] [2021-11-23 03:34:34,306 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 03:34:34,306 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-11-23 03:34:34,306 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:34:34,306 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-11-23 03:34:34,307 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=1118, Unknown=0, NotChecked=0, Total=1260 [2021-11-23 03:34:34,307 INFO L87 Difference]: Start difference. First operand 30 states and 31 transitions. Second operand has 28 states, 27 states have (on average 2.259259259259259) internal successors, (61), 27 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:34:35,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:34:35,038 INFO L93 Difference]: Finished difference Result 36 states and 37 transitions. [2021-11-23 03:34:35,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-11-23 03:34:35,039 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 27 states have (on average 2.259259259259259) internal successors, (61), 27 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-11-23 03:34:35,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:34:35,039 INFO L225 Difference]: With dead ends: 36 [2021-11-23 03:34:35,040 INFO L226 Difference]: Without dead ends: 36 [2021-11-23 03:34:35,041 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 61 SyntacticMatches, 2 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 474 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=341, Invalid=1915, Unknown=0, NotChecked=0, Total=2256 [2021-11-23 03:34:35,042 INFO L933 BasicCegarLoop]: 5 mSDtfsCounter, 127 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 371 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 127 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 406 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 371 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-23 03:34:35,042 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [127 Valid, 43 Invalid, 406 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 371 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-23 03:34:35,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2021-11-23 03:34:35,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 34. [2021-11-23 03:34:35,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 33 states have (on average 1.0606060606060606) internal successors, (35), 33 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:34:35,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 35 transitions. [2021-11-23 03:34:35,045 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 35 transitions. Word has length 29 [2021-11-23 03:34:35,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:34:35,046 INFO L470 AbstractCegarLoop]: Abstraction has 34 states and 35 transitions. [2021-11-23 03:34:35,046 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 27 states have (on average 2.259259259259259) internal successors, (61), 27 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:34:35,046 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 35 transitions. [2021-11-23 03:34:35,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-11-23 03:34:35,048 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:34:35,048 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 4, 4, 1, 1, 1, 1] [2021-11-23 03:34:35,079 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21a6edcb-af60-4a32-bb46-6fb8d4eccf94/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-11-23 03:34:35,258 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21a6edcb-af60-4a32-bb46-6fb8d4eccf94/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-11-23 03:34:35,258 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 7 more)] === [2021-11-23 03:34:35,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:34:35,258 INFO L85 PathProgramCache]: Analyzing trace with hash -1553600894, now seen corresponding path program 8 times [2021-11-23 03:34:35,259 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:34:35,259 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [42683086] [2021-11-23 03:34:35,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:34:35,259 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:34:35,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:34:36,061 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 10 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:34:36,061 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:34:36,061 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [42683086] [2021-11-23 03:34:36,062 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [42683086] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 03:34:36,062 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [300799594] [2021-11-23 03:34:36,062 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-23 03:34:36,062 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:34:36,062 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21a6edcb-af60-4a32-bb46-6fb8d4eccf94/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:34:36,066 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21a6edcb-af60-4a32-bb46-6fb8d4eccf94/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:34:36,070 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21a6edcb-af60-4a32-bb46-6fb8d4eccf94/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-11-23 03:34:36,214 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-11-23 03:34:36,214 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 03:34:36,218 INFO L263 TraceCheckSpWp]: Trace formula consists of 289 conjuncts, 93 conjunts are in the unsatisfiable core [2021-11-23 03:34:36,222 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:34:36,252 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-11-23 03:34:36,665 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-11-23 03:34:36,833 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 27 [2021-11-23 03:34:36,958 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2021-11-23 03:34:37,052 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2021-11-23 03:34:37,162 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-23 03:34:37,162 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 22 [2021-11-23 03:34:37,179 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-11-23 03:34:37,190 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 10 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:34:37,190 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:34:59,824 WARN L838 $PredicateComparison]: unable to prove that (forall ((|ULTIMATE.start_cstrncpy_#t~post3#1.offset| Int) (|ULTIMATE.start_cstrncpy_#t~mem5#1| Int)) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_~dst~0#1.base| (store (select |c_#memory_int| |c_ULTIMATE.start_cstrncpy_~dst~0#1.base|) |ULTIMATE.start_cstrncpy_#t~post3#1.offset| |ULTIMATE.start_cstrncpy_#t~mem5#1|)) |c_ULTIMATE.start_cstrncpy_~src~0#1.base|) (+ |c_ULTIMATE.start_cstrncpy_~src~0#1.offset| 1)) 0)) is different from false [2021-11-23 03:36:37,994 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_cstrncpy_#t~mem5#1_102| Int) (|v_ULTIMATE.start_cstrncpy_#t~post3#1.offset_106| Int) (|v_ULTIMATE.start_cstrncpy_#t~post3#1.offset_103| Int) (|ULTIMATE.start_cstrncpy_#t~post3#1.offset| Int) (|ULTIMATE.start_cstrncpy_#t~mem5#1| Int) (|v_ULTIMATE.start_cstrncpy_#t~post3#1.offset_100| Int) (|v_ULTIMATE.start_cstrncpy_#t~mem5#1_99| Int) (|v_ULTIMATE.start_cstrncpy_#t~mem5#1_105| Int)) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_~dst~0#1.base| (store (store (store (store (select |c_#memory_int| |c_ULTIMATE.start_cstrncpy_~dst~0#1.base|) |ULTIMATE.start_cstrncpy_#t~post3#1.offset| |ULTIMATE.start_cstrncpy_#t~mem5#1|) |v_ULTIMATE.start_cstrncpy_#t~post3#1.offset_106| |v_ULTIMATE.start_cstrncpy_#t~mem5#1_105|) |v_ULTIMATE.start_cstrncpy_#t~post3#1.offset_103| |v_ULTIMATE.start_cstrncpy_#t~mem5#1_102|) |v_ULTIMATE.start_cstrncpy_#t~post3#1.offset_100| |v_ULTIMATE.start_cstrncpy_#t~mem5#1_99|)) |c_ULTIMATE.start_cstrncpy_~src~0#1.base|) (+ |c_ULTIMATE.start_cstrncpy_~src~0#1.offset| 4)) 0)) is different from false [2021-11-23 03:36:38,015 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 49258 treesize of output 48874 [2021-11-23 03:36:41,302 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: BigInteger out of long range [2021-11-23 03:36:41,303 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1906720509] [2021-11-23 03:36:41,304 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2021-11-23 03:36:41,304 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 03:36:41,304 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 03:36:41,304 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 03:36:41,304 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 03:36:41,350 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:36:41,352 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2021-11-23 03:36:41,382 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2021-11-23 03:36:41,417 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2021-11-23 03:36:41,446 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2021-11-23 03:36:41,509 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-11-23 03:36:41,572 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:36:41,575 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:36:41,608 INFO L354 Elim1Store]: treesize reduction 60, result has 23.1 percent of original size [2021-11-23 03:36:41,608 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 29 treesize of output 31 [2021-11-23 03:36:41,715 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-23 03:36:41,715 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 18 [2021-11-23 03:36:41,864 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-23 03:36:41,864 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 18 [2021-11-23 03:36:41,923 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 03:36:43,340 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3079#(and (<= |ULTIMATE.start_main_~length~0#1| 2147483647) (<= |ULTIMATE.start_main_~n~0#1| 2147483647) (<= |ULTIMATE.start_cstrncpy_#in~n#1| 2147483647) (<= 0 |ULTIMATE.start_cstrncpy_#t~post4#1.base|) (<= 0 |ULTIMATE.start_cstrncpy_~s2#1.base|) (<= 0 |ULTIMATE.start_cstrncpy_#in~s1#1.base|) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.offset|) (<= 0 |ULTIMATE.start_cstrncpy_~src~0#1.base|) (<= 0 |ULTIMATE.start_cstrncpy_#in~s2#1.offset|) (<= 0 |ULTIMATE.start_main_#t~malloc10#1.base|) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.base|) (<= 0 |ULTIMATE.start_cstrncpy_#t~post3#1.base|) (< (select |#length| |ULTIMATE.start_cstrncpy_#t~post4#1.base|) (+ |ULTIMATE.start_cstrncpy_#t~post4#1.offset| 1)) (<= 0 |ULTIMATE.start_cstrncpy_~s1#1.offset|) (<= 1 |ULTIMATE.start_cstrncpy_#in~n#1|) (<= 0 |ULTIMATE.start_cstrncpy_~s1#1.base|) (<= |ULTIMATE.start_main_~nondetString~0#1.offset| 0) (<= 1 |ULTIMATE.start_cstrncpy_~src~0#1.offset|) (<= 0 |ULTIMATE.start_cstrncpy_#t~post4#1.offset|) (<= 0 |ULTIMATE.start_main_#t~malloc11#1.base|) (<= 1 |ULTIMATE.start_cstrncpy_~dst~0#1.offset|) (<= |ULTIMATE.start_cstrncpy_~s1#1.offset| 0) (<= 0 |ULTIMATE.start_cstrncpy_#in~s2#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString~0#1.base|) (<= 0 |ULTIMATE.start_cstrncpy_~s2#1.offset|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_cstrncpy_#t~post3#1.offset|) (<= 0 |ULTIMATE.start_main_~nondetString~0#1.offset|) (<= 0 |ULTIMATE.start_cstrncpy_#in~s1#1.offset|) (<= 1 |ULTIMATE.start_main_~n~0#1|) (<= |ULTIMATE.start_cstrncpy_#in~s2#1.offset| 0) (<= 1 |ULTIMATE.start_main_~length~0#1|) (<= |ULTIMATE.start_cstrncpy_#in~s1#1.offset| 0) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_cstrncpy_~dst~0#1.base|) (= |ULTIMATE.start_main_#t~malloc11#1.offset| 0) (<= |ULTIMATE.start_cstrncpy_~s2#1.offset| 0) (<= |ULTIMATE.start_cstrncpy_~n#1| 2147483646) (<= |ULTIMATE.start_main_~nondetArea~0#1.offset| 0) (<= 0 |#StackHeapBarrier|) (= |ULTIMATE.start_main_#t~malloc10#1.offset| 0) (= |#NULL.base| 0))' at error location [2021-11-23 03:36:43,340 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-23 03:36:43,340 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-11-23 03:36:43,340 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2021-11-23 03:36:43,340 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [480809241] [2021-11-23 03:36:43,340 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-11-23 03:36:43,341 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-11-23 03:36:43,341 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:36:43,341 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-11-23 03:36:43,342 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=160, Invalid=2230, Unknown=68, NotChecked=194, Total=2652 [2021-11-23 03:36:43,342 INFO L87 Difference]: Start difference. First operand 34 states and 35 transitions. Second operand has 24 states, 24 states have (on average 1.375) internal successors, (33), 23 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:36:47,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:36:47,717 INFO L93 Difference]: Finished difference Result 58 states and 59 transitions. [2021-11-23 03:36:47,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-11-23 03:36:47,717 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.375) internal successors, (33), 23 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-11-23 03:36:47,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:36:47,718 INFO L225 Difference]: With dead ends: 58 [2021-11-23 03:36:47,718 INFO L226 Difference]: Without dead ends: 37 [2021-11-23 03:36:47,720 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 59 SyntacticMatches, 1 SemanticMatches, 63 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 852 ImplicationChecksByTransitivity, 127.2s TimeCoverageRelationStatistics Valid=286, Invalid=3557, Unknown=71, NotChecked=246, Total=4160 [2021-11-23 03:36:47,721 INFO L933 BasicCegarLoop]: 5 mSDtfsCounter, 28 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 561 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 596 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 561 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-23 03:36:47,721 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 67 Invalid, 596 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 561 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-23 03:36:47,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2021-11-23 03:36:47,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 36. [2021-11-23 03:36:47,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 35 states have (on average 1.0571428571428572) internal successors, (37), 35 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:36:47,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 37 transitions. [2021-11-23 03:36:47,724 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 37 transitions. Word has length 33 [2021-11-23 03:36:47,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:36:47,724 INFO L470 AbstractCegarLoop]: Abstraction has 36 states and 37 transitions. [2021-11-23 03:36:47,724 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.375) internal successors, (33), 23 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:36:47,725 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 37 transitions. [2021-11-23 03:36:47,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-11-23 03:36:47,726 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:36:47,726 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 1, 1, 1, 1] [2021-11-23 03:36:47,749 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21a6edcb-af60-4a32-bb46-6fb8d4eccf94/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-11-23 03:36:47,934 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21a6edcb-af60-4a32-bb46-6fb8d4eccf94/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-11-23 03:36:47,934 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 7 more)] === [2021-11-23 03:36:47,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:36:47,934 INFO L85 PathProgramCache]: Analyzing trace with hash 2025965028, now seen corresponding path program 9 times [2021-11-23 03:36:47,934 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:36:47,934 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1621203844] [2021-11-23 03:36:47,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:36:47,935 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:36:47,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:36:48,335 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 9 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:36:48,336 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:36:48,336 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1621203844] [2021-11-23 03:36:48,336 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1621203844] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 03:36:48,336 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [537370058] [2021-11-23 03:36:48,336 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-23 03:36:48,336 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:36:48,336 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21a6edcb-af60-4a32-bb46-6fb8d4eccf94/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:36:48,338 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21a6edcb-af60-4a32-bb46-6fb8d4eccf94/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:36:48,339 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21a6edcb-af60-4a32-bb46-6fb8d4eccf94/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-11-23 03:36:48,532 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-23 03:36:48,532 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 03:36:48,535 INFO L263 TraceCheckSpWp]: Trace formula consists of 299 conjuncts, 65 conjunts are in the unsatisfiable core [2021-11-23 03:36:48,538 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:36:48,556 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-23 03:36:48,557 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-11-23 03:36:49,274 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 16 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:36:49,274 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:36:49,919 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 25 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:36:49,919 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [537370058] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 03:36:49,920 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1518303983] [2021-11-23 03:36:49,921 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2021-11-23 03:36:49,921 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 03:36:49,921 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 03:36:49,921 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 03:36:49,921 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 03:36:49,945 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:36:49,946 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2021-11-23 03:36:49,980 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2021-11-23 03:36:50,013 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2021-11-23 03:36:50,039 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2021-11-23 03:36:50,093 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-11-23 03:36:50,161 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:36:50,164 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:36:50,198 INFO L354 Elim1Store]: treesize reduction 60, result has 23.1 percent of original size [2021-11-23 03:36:50,198 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 29 treesize of output 31 [2021-11-23 03:36:50,308 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-23 03:36:50,308 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 18 [2021-11-23 03:36:50,451 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-23 03:36:50,452 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 18 [2021-11-23 03:36:50,517 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 03:36:51,915 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3455#(and (<= |ULTIMATE.start_main_~length~0#1| 2147483647) (<= |ULTIMATE.start_main_~n~0#1| 2147483647) (<= |ULTIMATE.start_cstrncpy_#in~n#1| 2147483647) (<= 0 |ULTIMATE.start_cstrncpy_#t~post4#1.base|) (<= 0 |ULTIMATE.start_cstrncpy_~s2#1.base|) (<= 0 |ULTIMATE.start_cstrncpy_#in~s1#1.base|) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.offset|) (<= 0 |ULTIMATE.start_cstrncpy_~src~0#1.base|) (<= 0 |ULTIMATE.start_cstrncpy_#in~s2#1.offset|) (<= 0 |ULTIMATE.start_main_#t~malloc10#1.base|) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.base|) (<= 0 |ULTIMATE.start_cstrncpy_#t~post3#1.base|) (< (select |#length| |ULTIMATE.start_cstrncpy_#t~post4#1.base|) (+ |ULTIMATE.start_cstrncpy_#t~post4#1.offset| 1)) (<= 0 |ULTIMATE.start_cstrncpy_~s1#1.offset|) (<= 1 |ULTIMATE.start_cstrncpy_#in~n#1|) (<= 0 |ULTIMATE.start_cstrncpy_~s1#1.base|) (<= |ULTIMATE.start_main_~nondetString~0#1.offset| 0) (<= 1 |ULTIMATE.start_cstrncpy_~src~0#1.offset|) (<= 0 |ULTIMATE.start_cstrncpy_#t~post4#1.offset|) (<= 0 |ULTIMATE.start_main_#t~malloc11#1.base|) (<= 1 |ULTIMATE.start_cstrncpy_~dst~0#1.offset|) (<= |ULTIMATE.start_cstrncpy_~s1#1.offset| 0) (<= 0 |ULTIMATE.start_cstrncpy_#in~s2#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString~0#1.base|) (<= 0 |ULTIMATE.start_cstrncpy_~s2#1.offset|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_cstrncpy_#t~post3#1.offset|) (<= 0 |ULTIMATE.start_main_~nondetString~0#1.offset|) (<= 0 |ULTIMATE.start_cstrncpy_#in~s1#1.offset|) (<= 1 |ULTIMATE.start_main_~n~0#1|) (<= |ULTIMATE.start_cstrncpy_#in~s2#1.offset| 0) (<= 1 |ULTIMATE.start_main_~length~0#1|) (<= |ULTIMATE.start_cstrncpy_#in~s1#1.offset| 0) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_cstrncpy_~dst~0#1.base|) (= |ULTIMATE.start_main_#t~malloc11#1.offset| 0) (<= |ULTIMATE.start_cstrncpy_~s2#1.offset| 0) (<= |ULTIMATE.start_cstrncpy_~n#1| 2147483646) (<= |ULTIMATE.start_main_~nondetArea~0#1.offset| 0) (<= 0 |#StackHeapBarrier|) (= |ULTIMATE.start_main_#t~malloc10#1.offset| 0) (= |#NULL.base| 0))' at error location [2021-11-23 03:36:51,916 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-23 03:36:51,916 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 03:36:51,916 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 42 [2021-11-23 03:36:51,916 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [520664736] [2021-11-23 03:36:51,916 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 03:36:51,917 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2021-11-23 03:36:51,917 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:36:51,917 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2021-11-23 03:36:51,918 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=270, Invalid=2382, Unknown=0, NotChecked=0, Total=2652 [2021-11-23 03:36:51,919 INFO L87 Difference]: Start difference. First operand 36 states and 37 transitions. Second operand has 44 states, 43 states have (on average 2.441860465116279) internal successors, (105), 43 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:36:52,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:36:52,662 INFO L93 Difference]: Finished difference Result 42 states and 43 transitions. [2021-11-23 03:36:52,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-11-23 03:36:52,662 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 43 states have (on average 2.441860465116279) internal successors, (105), 43 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-11-23 03:36:52,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:36:52,663 INFO L225 Difference]: With dead ends: 42 [2021-11-23 03:36:52,663 INFO L226 Difference]: Without dead ends: 42 [2021-11-23 03:36:52,665 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1120 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=632, Invalid=3658, Unknown=0, NotChecked=0, Total=4290 [2021-11-23 03:36:52,665 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 194 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 461 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 194 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 517 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 461 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-23 03:36:52,666 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [194 Valid, 55 Invalid, 517 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 461 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-23 03:36:52,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2021-11-23 03:36:52,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 40. [2021-11-23 03:36:52,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 39 states have (on average 1.0512820512820513) internal successors, (41), 39 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:36:52,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 41 transitions. [2021-11-23 03:36:52,668 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 41 transitions. Word has length 35 [2021-11-23 03:36:52,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:36:52,668 INFO L470 AbstractCegarLoop]: Abstraction has 40 states and 41 transitions. [2021-11-23 03:36:52,669 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 43 states have (on average 2.441860465116279) internal successors, (105), 43 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:36:52,669 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 41 transitions. [2021-11-23 03:36:52,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-11-23 03:36:52,670 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:36:52,670 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 5, 5, 1, 1, 1, 1] [2021-11-23 03:36:52,693 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21a6edcb-af60-4a32-bb46-6fb8d4eccf94/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2021-11-23 03:36:52,874 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21a6edcb-af60-4a32-bb46-6fb8d4eccf94/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:36:52,874 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 7 more)] === [2021-11-23 03:36:52,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:36:52,875 INFO L85 PathProgramCache]: Analyzing trace with hash 350184125, now seen corresponding path program 10 times [2021-11-23 03:36:52,875 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:36:52,875 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [165480556] [2021-11-23 03:36:52,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:36:52,875 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:36:52,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:36:53,710 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 12 proven. 85 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:36:53,710 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:36:53,711 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [165480556] [2021-11-23 03:36:53,711 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [165480556] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 03:36:53,711 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [606945277] [2021-11-23 03:36:53,711 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-23 03:36:53,711 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:36:53,711 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21a6edcb-af60-4a32-bb46-6fb8d4eccf94/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:36:53,712 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21a6edcb-af60-4a32-bb46-6fb8d4eccf94/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:36:53,713 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21a6edcb-af60-4a32-bb46-6fb8d4eccf94/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-11-23 03:36:53,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:36:53,794 INFO L263 TraceCheckSpWp]: Trace formula consists of 330 conjuncts, 108 conjunts are in the unsatisfiable core [2021-11-23 03:36:53,796 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:36:53,804 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-11-23 03:36:54,191 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-11-23 03:36:54,345 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 27 [2021-11-23 03:36:54,454 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2021-11-23 03:36:54,530 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2021-11-23 03:36:54,608 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2021-11-23 03:36:54,681 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-23 03:36:54,681 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 22 [2021-11-23 03:36:54,693 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-11-23 03:36:54,700 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 12 proven. 85 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:36:54,700 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:37:33,720 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_cstrncpy_#t~mem5#1_131| Int) (|ULTIMATE.start_cstrncpy_#t~post3#1.offset| Int) (|ULTIMATE.start_cstrncpy_#t~mem5#1| Int) (|v_ULTIMATE.start_cstrncpy_#t~post3#1.offset_133| Int)) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_~dst~0#1.base| (store (store (select |c_#memory_int| |c_ULTIMATE.start_cstrncpy_~dst~0#1.base|) |ULTIMATE.start_cstrncpy_#t~post3#1.offset| |ULTIMATE.start_cstrncpy_#t~mem5#1|) |v_ULTIMATE.start_cstrncpy_#t~post3#1.offset_133| |v_ULTIMATE.start_cstrncpy_#t~mem5#1_131|)) |c_ULTIMATE.start_cstrncpy_~src~0#1.base|) (+ |c_ULTIMATE.start_cstrncpy_~src~0#1.offset| 2)) 0)) is different from false [2021-11-23 03:38:18,749 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_cstrncpy_#t~mem5#1_137| Int) (|v_ULTIMATE.start_cstrncpy_#t~mem5#1_134| Int) (|v_ULTIMATE.start_cstrncpy_#t~post3#1.offset_139| Int) (|v_ULTIMATE.start_cstrncpy_#t~post3#1.offset_136| Int) (|v_ULTIMATE.start_cstrncpy_#t~mem5#1_131| Int) (|ULTIMATE.start_cstrncpy_#t~post3#1.offset| Int) (|ULTIMATE.start_cstrncpy_#t~mem5#1| Int) (|v_ULTIMATE.start_cstrncpy_#t~post3#1.offset_133| Int)) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_~dst~0#1.base| (store (store (store (store (select |c_#memory_int| |c_ULTIMATE.start_cstrncpy_~dst~0#1.base|) |ULTIMATE.start_cstrncpy_#t~post3#1.offset| |ULTIMATE.start_cstrncpy_#t~mem5#1|) |v_ULTIMATE.start_cstrncpy_#t~post3#1.offset_139| |v_ULTIMATE.start_cstrncpy_#t~mem5#1_137|) |v_ULTIMATE.start_cstrncpy_#t~post3#1.offset_136| |v_ULTIMATE.start_cstrncpy_#t~mem5#1_134|) |v_ULTIMATE.start_cstrncpy_#t~post3#1.offset_133| |v_ULTIMATE.start_cstrncpy_#t~mem5#1_131|)) |c_ULTIMATE.start_cstrncpy_~src~0#1.base|) (+ |c_ULTIMATE.start_cstrncpy_~src~0#1.offset| 4)) 0)) is different from false [2021-11-23 03:38:42,105 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_cstrncpy_#t~mem5#1_137| Int) (|v_ULTIMATE.start_cstrncpy_#t~mem5#1_134| Int) (|v_ULTIMATE.start_cstrncpy_#t~post3#1.offset_139| Int) (|v_ULTIMATE.start_cstrncpy_#t~post3#1.offset_136| Int) (|v_ULTIMATE.start_cstrncpy_#t~mem5#1_131| Int) (|ULTIMATE.start_cstrncpy_#t~post3#1.offset| Int) (|ULTIMATE.start_cstrncpy_#t~mem5#1| Int) (|v_ULTIMATE.start_cstrncpy_#t~mem5#1_140| Int) (|v_ULTIMATE.start_cstrncpy_#t~post3#1.offset_133| Int) (|v_ULTIMATE.start_cstrncpy_#t~post3#1.offset_142| Int)) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_~dst~0#1.base| (store (store (store (store (store (select |c_#memory_int| |c_ULTIMATE.start_cstrncpy_~dst~0#1.base|) |ULTIMATE.start_cstrncpy_#t~post3#1.offset| |ULTIMATE.start_cstrncpy_#t~mem5#1|) |v_ULTIMATE.start_cstrncpy_#t~post3#1.offset_142| |v_ULTIMATE.start_cstrncpy_#t~mem5#1_140|) |v_ULTIMATE.start_cstrncpy_#t~post3#1.offset_139| |v_ULTIMATE.start_cstrncpy_#t~mem5#1_137|) |v_ULTIMATE.start_cstrncpy_#t~post3#1.offset_136| |v_ULTIMATE.start_cstrncpy_#t~mem5#1_134|) |v_ULTIMATE.start_cstrncpy_#t~post3#1.offset_133| |v_ULTIMATE.start_cstrncpy_#t~mem5#1_131|)) |c_ULTIMATE.start_cstrncpy_~src~0#1.base|) (+ |c_ULTIMATE.start_cstrncpy_~src~0#1.offset| 5)) 0)) is different from false [2021-11-23 03:38:42,179 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 100794346 treesize of output 100401130