./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/ldv-regression/test27-2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 38b53e6a Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d216b91-91a8-4fa2-9614-bc20cd590896/bin/utaipan-ByfvJB40ur/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d216b91-91a8-4fa2-9614-bc20cd590896/bin/utaipan-ByfvJB40ur/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d216b91-91a8-4fa2-9614-bc20cd590896/bin/utaipan-ByfvJB40ur/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d216b91-91a8-4fa2-9614-bc20cd590896/bin/utaipan-ByfvJB40ur/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/ldv-regression/test27-2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d216b91-91a8-4fa2-9614-bc20cd590896/bin/utaipan-ByfvJB40ur/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d216b91-91a8-4fa2-9614-bc20cd590896/bin/utaipan-ByfvJB40ur --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 8b17e864f5b8145df67cb2b3dc045f82af33b1bd3c9c5e4c95275bcb385f71da --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-38b53e6 [2022-11-25 22:16:54,253 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-25 22:16:54,255 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-25 22:16:54,293 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-25 22:16:54,299 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-25 22:16:54,300 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-25 22:16:54,303 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-25 22:16:54,308 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-25 22:16:54,310 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-25 22:16:54,312 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-25 22:16:54,313 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-25 22:16:54,315 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-25 22:16:54,317 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-25 22:16:54,321 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-25 22:16:54,323 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-25 22:16:54,324 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-25 22:16:54,326 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-25 22:16:54,333 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-25 22:16:54,335 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-25 22:16:54,336 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-25 22:16:54,342 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-25 22:16:54,347 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-25 22:16:54,348 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-25 22:16:54,349 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-25 22:16:54,352 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-25 22:16:54,352 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-25 22:16:54,352 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-25 22:16:54,353 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-25 22:16:54,354 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-25 22:16:54,354 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-25 22:16:54,355 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-25 22:16:54,355 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-25 22:16:54,356 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-25 22:16:54,357 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-25 22:16:54,358 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-25 22:16:54,358 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-25 22:16:54,359 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-25 22:16:54,359 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-25 22:16:54,359 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-25 22:16:54,360 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-25 22:16:54,361 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-25 22:16:54,367 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d216b91-91a8-4fa2-9614-bc20cd590896/bin/utaipan-ByfvJB40ur/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2022-11-25 22:16:54,396 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-25 22:16:54,396 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-25 22:16:54,396 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-25 22:16:54,397 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-25 22:16:54,397 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-25 22:16:54,397 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-25 22:16:54,398 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-25 22:16:54,398 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-25 22:16:54,398 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-25 22:16:54,398 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-25 22:16:54,398 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-25 22:16:54,399 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-25 22:16:54,399 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-25 22:16:54,399 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-25 22:16:54,399 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-25 22:16:54,399 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-25 22:16:54,400 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-25 22:16:54,400 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-25 22:16:54,400 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-25 22:16:54,401 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-25 22:16:54,401 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-25 22:16:54,401 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-25 22:16:54,401 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-25 22:16:54,401 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-25 22:16:54,401 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-25 22:16:54,402 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-25 22:16:54,402 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-11-25 22:16:54,402 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-11-25 22:16:54,402 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-11-25 22:16:54,402 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-25 22:16:54,403 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-25 22:16:54,403 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-25 22:16:54,403 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-25 22:16:54,403 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-25 22:16:54,403 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-25 22:16:54,403 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 22:16:54,404 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-25 22:16:54,404 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-25 22:16:54,404 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-25 22:16:54,404 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-25 22:16:54,404 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-25 22:16:54,405 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-25 22:16:54,405 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d216b91-91a8-4fa2-9614-bc20cd590896/bin/utaipan-ByfvJB40ur/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d216b91-91a8-4fa2-9614-bc20cd590896/bin/utaipan-ByfvJB40ur Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8b17e864f5b8145df67cb2b3dc045f82af33b1bd3c9c5e4c95275bcb385f71da [2022-11-25 22:16:54,676 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-25 22:16:54,708 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-25 22:16:54,710 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-25 22:16:54,712 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-25 22:16:54,712 INFO L275 PluginConnector]: CDTParser initialized [2022-11-25 22:16:54,713 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d216b91-91a8-4fa2-9614-bc20cd590896/bin/utaipan-ByfvJB40ur/../../sv-benchmarks/c/ldv-regression/test27-2.c [2022-11-25 22:16:57,719 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-25 22:16:57,939 INFO L351 CDTParser]: Found 1 translation units. [2022-11-25 22:16:57,940 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d216b91-91a8-4fa2-9614-bc20cd590896/sv-benchmarks/c/ldv-regression/test27-2.c [2022-11-25 22:16:57,946 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d216b91-91a8-4fa2-9614-bc20cd590896/bin/utaipan-ByfvJB40ur/data/04c803bee/b63a5fb064234bdba3dbe5244c1364cb/FLAGb2315851d [2022-11-25 22:16:57,969 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d216b91-91a8-4fa2-9614-bc20cd590896/bin/utaipan-ByfvJB40ur/data/04c803bee/b63a5fb064234bdba3dbe5244c1364cb [2022-11-25 22:16:57,974 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-25 22:16:57,976 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-25 22:16:57,977 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-25 22:16:57,977 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-25 22:16:57,981 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-25 22:16:57,982 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 10:16:57" (1/1) ... [2022-11-25 22:16:57,983 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6325bcce and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 10:16:57, skipping insertion in model container [2022-11-25 22:16:57,983 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 10:16:57" (1/1) ... [2022-11-25 22:16:57,992 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-25 22:16:58,015 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-25 22:16:58,197 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d216b91-91a8-4fa2-9614-bc20cd590896/sv-benchmarks/c/ldv-regression/test27-2.c[1224,1237] [2022-11-25 22:16:58,200 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 22:16:58,210 INFO L203 MainTranslator]: Completed pre-run [2022-11-25 22:16:58,231 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d216b91-91a8-4fa2-9614-bc20cd590896/sv-benchmarks/c/ldv-regression/test27-2.c[1224,1237] [2022-11-25 22:16:58,232 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 22:16:58,244 INFO L208 MainTranslator]: Completed translation [2022-11-25 22:16:58,245 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 10:16:58 WrapperNode [2022-11-25 22:16:58,245 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-25 22:16:58,246 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-25 22:16:58,246 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-25 22:16:58,246 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-25 22:16:58,254 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 10:16:58" (1/1) ... [2022-11-25 22:16:58,262 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 10:16:58" (1/1) ... [2022-11-25 22:16:58,284 INFO L138 Inliner]: procedures = 16, calls = 42, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 113 [2022-11-25 22:16:58,285 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-25 22:16:58,286 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-25 22:16:58,286 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-25 22:16:58,286 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-25 22:16:58,296 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 10:16:58" (1/1) ... [2022-11-25 22:16:58,297 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 10:16:58" (1/1) ... [2022-11-25 22:16:58,300 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 10:16:58" (1/1) ... [2022-11-25 22:16:58,300 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 10:16:58" (1/1) ... [2022-11-25 22:16:58,310 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 10:16:58" (1/1) ... [2022-11-25 22:16:58,325 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 10:16:58" (1/1) ... [2022-11-25 22:16:58,331 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 10:16:58" (1/1) ... [2022-11-25 22:16:58,334 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 10:16:58" (1/1) ... [2022-11-25 22:16:58,337 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-25 22:16:58,341 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-25 22:16:58,341 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-25 22:16:58,341 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-25 22:16:58,342 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 10:16:58" (1/1) ... [2022-11-25 22:16:58,350 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 22:16:58,369 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d216b91-91a8-4fa2-9614-bc20cd590896/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 22:16:58,388 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d216b91-91a8-4fa2-9614-bc20cd590896/bin/utaipan-ByfvJB40ur/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-25 22:16:58,419 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d216b91-91a8-4fa2-9614-bc20cd590896/bin/utaipan-ByfvJB40ur/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-25 22:16:58,439 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-11-25 22:16:58,439 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-25 22:16:58,439 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-25 22:16:58,439 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-11-25 22:16:58,439 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-25 22:16:58,440 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-25 22:16:58,440 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-25 22:16:58,440 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-25 22:16:58,440 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-25 22:16:58,441 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-25 22:16:58,549 INFO L235 CfgBuilder]: Building ICFG [2022-11-25 22:16:58,550 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-25 22:16:58,969 INFO L276 CfgBuilder]: Performing block encoding [2022-11-25 22:16:59,044 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-25 22:16:59,051 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2022-11-25 22:16:59,053 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 10:16:59 BoogieIcfgContainer [2022-11-25 22:16:59,054 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-25 22:16:59,056 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-25 22:16:59,056 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-25 22:16:59,058 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-25 22:16:59,058 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 10:16:57" (1/3) ... [2022-11-25 22:16:59,059 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6170701e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 10:16:59, skipping insertion in model container [2022-11-25 22:16:59,059 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 10:16:58" (2/3) ... [2022-11-25 22:16:59,059 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6170701e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 10:16:59, skipping insertion in model container [2022-11-25 22:16:59,059 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 10:16:59" (3/3) ... [2022-11-25 22:16:59,060 INFO L112 eAbstractionObserver]: Analyzing ICFG test27-2.c [2022-11-25 22:16:59,079 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-25 22:16:59,079 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 38 error locations. [2022-11-25 22:16:59,130 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-25 22:16:59,137 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@1dacf4cc, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-25 22:16:59,137 INFO L358 AbstractCegarLoop]: Starting to check reachability of 38 error locations. [2022-11-25 22:16:59,141 INFO L276 IsEmpty]: Start isEmpty. Operand has 67 states, 28 states have (on average 2.5714285714285716) internal successors, (72), 66 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:16:59,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-11-25 22:16:59,147 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:16:59,148 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-11-25 22:16:59,148 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2022-11-25 22:16:59,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:16:59,156 INFO L85 PathProgramCache]: Analyzing trace with hash 143511, now seen corresponding path program 1 times [2022-11-25 22:16:59,166 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:16:59,167 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [998862345] [2022-11-25 22:16:59,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:16:59,168 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:16:59,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:16:59,562 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 22:16:59,562 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:16:59,563 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [998862345] [2022-11-25 22:16:59,567 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [998862345] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 22:16:59,567 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 22:16:59,568 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-25 22:16:59,569 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [946795192] [2022-11-25 22:16:59,570 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 22:16:59,574 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 22:16:59,575 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:16:59,631 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 22:16:59,632 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 22:16:59,635 INFO L87 Difference]: Start difference. First operand has 67 states, 28 states have (on average 2.5714285714285716) internal successors, (72), 66 states have internal predecessors, (72), 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) [2022-11-25 22:16:59,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:16:59,737 INFO L93 Difference]: Finished difference Result 64 states and 67 transitions. [2022-11-25 22:16:59,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 22:16:59,740 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 [2022-11-25 22:16:59,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:16:59,748 INFO L225 Difference]: With dead ends: 64 [2022-11-25 22:16:59,748 INFO L226 Difference]: Without dead ends: 63 [2022-11-25 22:16:59,749 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 22:16:59,757 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 62 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-25 22:16:59,758 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [62 Valid, 27 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-25 22:16:59,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2022-11-25 22:16:59,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2022-11-25 22:16:59,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 28 states have (on average 2.357142857142857) internal successors, (66), 62 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:16:59,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 66 transitions. [2022-11-25 22:16:59,800 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 66 transitions. Word has length 3 [2022-11-25 22:16:59,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:16:59,802 INFO L495 AbstractCegarLoop]: Abstraction has 63 states and 66 transitions. [2022-11-25 22:16:59,803 INFO L496 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) [2022-11-25 22:16:59,804 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 66 transitions. [2022-11-25 22:16:59,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-11-25 22:16:59,806 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:16:59,806 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-11-25 22:16:59,806 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-25 22:16:59,807 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2022-11-25 22:16:59,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:16:59,808 INFO L85 PathProgramCache]: Analyzing trace with hash 143512, now seen corresponding path program 1 times [2022-11-25 22:16:59,808 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:16:59,808 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [362499388] [2022-11-25 22:16:59,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:16:59,808 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:16:59,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:17:00,022 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 22:17:00,022 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:17:00,023 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [362499388] [2022-11-25 22:17:00,023 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [362499388] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 22:17:00,023 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 22:17:00,023 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-25 22:17:00,023 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1386299212] [2022-11-25 22:17:00,023 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 22:17:00,024 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 22:17:00,025 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:17:00,025 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 22:17:00,025 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 22:17:00,026 INFO L87 Difference]: Start difference. First operand 63 states and 66 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) [2022-11-25 22:17:00,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:17:00,114 INFO L93 Difference]: Finished difference Result 68 states and 71 transitions. [2022-11-25 22:17:00,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 22:17:00,115 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 [2022-11-25 22:17:00,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:17:00,115 INFO L225 Difference]: With dead ends: 68 [2022-11-25 22:17:00,116 INFO L226 Difference]: Without dead ends: 68 [2022-11-25 22:17:00,116 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 22:17:00,117 INFO L413 NwaCegarLoop]: 57 mSDtfsCounter, 3 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 83 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-25 22:17:00,118 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 83 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-25 22:17:00,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2022-11-25 22:17:00,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 65. [2022-11-25 22:17:00,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 30 states have (on average 2.2666666666666666) internal successors, (68), 64 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:17:00,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 68 transitions. [2022-11-25 22:17:00,125 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 68 transitions. Word has length 3 [2022-11-25 22:17:00,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:17:00,125 INFO L495 AbstractCegarLoop]: Abstraction has 65 states and 68 transitions. [2022-11-25 22:17:00,125 INFO L496 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) [2022-11-25 22:17:00,126 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 68 transitions. [2022-11-25 22:17:00,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-11-25 22:17:00,126 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:17:00,126 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-11-25 22:17:00,126 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-25 22:17:00,127 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2022-11-25 22:17:00,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:17:00,127 INFO L85 PathProgramCache]: Analyzing trace with hash 4452019, now seen corresponding path program 1 times [2022-11-25 22:17:00,128 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:17:00,128 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1149681052] [2022-11-25 22:17:00,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:17:00,128 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:17:00,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:17:00,287 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 22:17:00,287 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:17:00,288 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1149681052] [2022-11-25 22:17:00,288 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1149681052] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 22:17:00,288 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 22:17:00,288 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-25 22:17:00,288 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [369596981] [2022-11-25 22:17:00,288 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 22:17:00,289 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-25 22:17:00,289 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:17:00,289 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-25 22:17:00,290 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-25 22:17:00,290 INFO L87 Difference]: Start difference. First operand 65 states and 68 transitions. Second operand has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:17:00,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:17:00,398 INFO L93 Difference]: Finished difference Result 62 states and 65 transitions. [2022-11-25 22:17:00,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 22:17:00,399 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 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 4 [2022-11-25 22:17:00,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:17:00,400 INFO L225 Difference]: With dead ends: 62 [2022-11-25 22:17:00,400 INFO L226 Difference]: Without dead ends: 62 [2022-11-25 22:17:00,400 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-25 22:17:00,401 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 117 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-25 22:17:00,402 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [117 Valid, 27 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-25 22:17:00,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2022-11-25 22:17:00,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2022-11-25 22:17:00,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 30 states have (on average 2.1666666666666665) internal successors, (65), 61 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:17:00,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 65 transitions. [2022-11-25 22:17:00,407 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 65 transitions. Word has length 4 [2022-11-25 22:17:00,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:17:00,407 INFO L495 AbstractCegarLoop]: Abstraction has 62 states and 65 transitions. [2022-11-25 22:17:00,408 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:17:00,409 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 65 transitions. [2022-11-25 22:17:00,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-11-25 22:17:00,410 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:17:00,410 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-11-25 22:17:00,410 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-25 22:17:00,410 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2022-11-25 22:17:00,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:17:00,413 INFO L85 PathProgramCache]: Analyzing trace with hash 4452020, now seen corresponding path program 1 times [2022-11-25 22:17:00,414 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:17:00,414 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2051634419] [2022-11-25 22:17:00,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:17:00,414 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:17:00,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:17:00,597 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 22:17:00,597 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:17:00,597 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2051634419] [2022-11-25 22:17:00,598 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2051634419] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 22:17:00,598 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 22:17:00,598 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-25 22:17:00,598 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1735504498] [2022-11-25 22:17:00,598 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 22:17:00,599 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-25 22:17:00,599 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:17:00,599 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-25 22:17:00,599 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-25 22:17:00,600 INFO L87 Difference]: Start difference. First operand 62 states and 65 transitions. Second operand has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:17:00,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:17:00,707 INFO L93 Difference]: Finished difference Result 63 states and 66 transitions. [2022-11-25 22:17:00,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 22:17:00,707 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 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 4 [2022-11-25 22:17:00,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:17:00,708 INFO L225 Difference]: With dead ends: 63 [2022-11-25 22:17:00,708 INFO L226 Difference]: Without dead ends: 63 [2022-11-25 22:17:00,709 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-25 22:17:00,710 INFO L413 NwaCegarLoop]: 55 mSDtfsCounter, 1 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 101 SdHoareTripleChecker+Invalid, 86 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 86 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-25 22:17:00,710 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 101 Invalid, 86 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 86 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-25 22:17:00,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2022-11-25 22:17:00,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2022-11-25 22:17:00,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 31 states have (on average 2.129032258064516) internal successors, (66), 62 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:17:00,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 66 transitions. [2022-11-25 22:17:00,716 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 66 transitions. Word has length 4 [2022-11-25 22:17:00,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:17:00,716 INFO L495 AbstractCegarLoop]: Abstraction has 63 states and 66 transitions. [2022-11-25 22:17:00,716 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:17:00,716 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 66 transitions. [2022-11-25 22:17:00,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-25 22:17:00,717 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:17:00,717 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1] [2022-11-25 22:17:00,717 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-25 22:17:00,717 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2022-11-25 22:17:00,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:17:00,718 INFO L85 PathProgramCache]: Analyzing trace with hash -16480614, now seen corresponding path program 1 times [2022-11-25 22:17:00,718 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:17:00,718 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1511825138] [2022-11-25 22:17:00,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:17:00,719 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:17:00,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:17:00,855 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 22:17:00,855 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:17:00,856 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1511825138] [2022-11-25 22:17:00,856 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1511825138] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 22:17:00,857 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1816481611] [2022-11-25 22:17:00,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:17:00,858 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:17:00,858 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d216b91-91a8-4fa2-9614-bc20cd590896/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 22:17:00,866 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d216b91-91a8-4fa2-9614-bc20cd590896/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 22:17:00,903 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d216b91-91a8-4fa2-9614-bc20cd590896/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-25 22:17:00,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:17:00,989 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-25 22:17:00,997 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 22:17:01,142 INFO L321 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2022-11-25 22:17:01,144 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 42 [2022-11-25 22:17:01,235 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 22:17:01,237 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 22:17:01,341 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 22:17:01,342 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1816481611] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 22:17:01,342 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1600267260] [2022-11-25 22:17:01,371 INFO L159 IcfgInterpreter]: Started Sifa with 5 locations of interest [2022-11-25 22:17:01,371 INFO L166 IcfgInterpreter]: Building call graph [2022-11-25 22:17:01,377 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-25 22:17:01,383 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-25 22:17:01,384 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-25 22:17:01,496 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:17:01,498 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:17:01,501 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:17:01,502 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:17:01,504 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:17:01,505 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:17:01,507 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:17:01,508 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:17:01,510 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:17:01,512 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:17:01,514 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:17:01,515 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:17:01,517 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:17:01,519 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:17:01,520 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:17:01,522 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:17:01,524 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:17:01,525 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:17:01,531 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 26 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 45 [2022-11-25 22:17:01,614 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:17:01,617 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 32 [2022-11-25 22:17:01,638 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2022-11-25 22:17:01,650 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2022-11-25 22:17:01,751 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-25 22:17:01,764 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-25 22:17:01,783 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:17:01,784 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:17:01,785 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:17:01,787 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 66 treesize of output 41 [2022-11-25 22:17:02,108 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:17:02,111 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:17:02,141 INFO L321 Elim1Store]: treesize reduction 49, result has 12.5 percent of original size [2022-11-25 22:17:02,142 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 445 treesize of output 433 [2022-11-25 22:17:02,183 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:17:02,185 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 453 treesize of output 433 [2022-11-25 22:17:02,214 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:17:02,215 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 453 treesize of output 433 [2022-11-25 22:17:02,496 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:17:02,498 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:17:02,499 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 22:17:02,502 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:17:02,560 INFO L321 Elim1Store]: treesize reduction 103, result has 16.3 percent of original size [2022-11-25 22:17:02,560 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 467 treesize of output 428 [2022-11-25 22:17:02,603 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 432 treesize of output 431 [2022-11-25 22:17:02,637 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 432 treesize of output 431 [2022-11-25 22:17:02,845 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2022-11-25 22:17:02,870 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-25 22:17:02,883 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2022-11-25 22:17:02,918 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-25 22:17:02,927 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-25 22:17:02,953 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 22:17:02,967 INFO L321 Elim1Store]: treesize reduction 27, result has 37.2 percent of original size [2022-11-25 22:17:02,968 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 52 treesize of output 25 [2022-11-25 22:17:03,015 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-25 22:17:03,033 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2022-11-25 22:17:03,042 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2022-11-25 22:17:03,057 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-25 22:17:03,706 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '633#(and (<= 0 |ULTIMATE.start_main_~#dummies~0#1.base|) (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (<= |ULTIMATE.start_main_~i~0#1| 2147483647) (<= 0 |ULTIMATE.start_main_~#a~0#1.offset|) (<= 0 (+ |ULTIMATE.start_main_~i~0#1| 2147483648)) (<= 0 |ULTIMATE.start_main_~#cont~0#1.offset|) (<= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#dummy~0#1.base|) (<= 0 |ULTIMATE.start_main_~j~0#1|) (<= 0 |ULTIMATE.start_main_~#dummies~0#1.offset|) (<= |ULTIMATE.start_main_#t~nondet10#1| 2147483647) (<= |ULTIMATE.start_main_~#cont~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#cont~0#1.base|) (<= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start_main_~#dummy~0#1.offset| 0) (<= |ULTIMATE.start_main_~#dummies~0#1.offset| 0) (not (<= (+ |ULTIMATE.start_main_~#a~0#1.offset| 4 (* |ULTIMATE.start_main_~j~0#1| 4)) (select |#length| |ULTIMATE.start_main_~#a~0#1.base|))) (<= 0 |#NULL.offset|) (<= 0 |#StackHeapBarrier|) (<= 0 (+ 2147483648 |ULTIMATE.start_main_#t~nondet10#1|)) (< |ULTIMATE.start_main_~j~0#1| 10) (= |#NULL.base| 0))' at error location [2022-11-25 22:17:03,706 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-25 22:17:03,706 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 22:17:03,707 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 2, 2] total 7 [2022-11-25 22:17:03,707 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2059452582] [2022-11-25 22:17:03,707 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 22:17:03,707 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-25 22:17:03,707 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:17:03,708 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-25 22:17:03,708 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2022-11-25 22:17:03,709 INFO L87 Difference]: Start difference. First operand 63 states and 66 transitions. Second operand has 9 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:17:04,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:17:04,077 INFO L93 Difference]: Finished difference Result 175 states and 186 transitions. [2022-11-25 22:17:04,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-25 22:17:04,078 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2022-11-25 22:17:04,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:17:04,079 INFO L225 Difference]: With dead ends: 175 [2022-11-25 22:17:04,079 INFO L226 Difference]: Without dead ends: 175 [2022-11-25 22:17:04,079 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2022-11-25 22:17:04,080 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 349 mSDsluCounter, 116 mSDsCounter, 0 mSdLazyCounter, 237 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 349 SdHoareTripleChecker+Valid, 139 SdHoareTripleChecker+Invalid, 242 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 237 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-25 22:17:04,081 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [349 Valid, 139 Invalid, 242 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 237 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-25 22:17:04,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2022-11-25 22:17:04,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 63. [2022-11-25 22:17:04,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 32 states have (on average 2.0625) internal successors, (66), 62 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:17:04,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 66 transitions. [2022-11-25 22:17:04,087 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 66 transitions. Word has length 6 [2022-11-25 22:17:04,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:17:04,087 INFO L495 AbstractCegarLoop]: Abstraction has 63 states and 66 transitions. [2022-11-25 22:17:04,087 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:17:04,087 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 66 transitions. [2022-11-25 22:17:04,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-25 22:17:04,087 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:17:04,088 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1] [2022-11-25 22:17:04,094 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d216b91-91a8-4fa2-9614-bc20cd590896/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-11-25 22:17:04,288 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d216b91-91a8-4fa2-9614-bc20cd590896/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:17:04,289 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2022-11-25 22:17:04,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:17:04,289 INFO L85 PathProgramCache]: Analyzing trace with hash -510895886, now seen corresponding path program 1 times [2022-11-25 22:17:04,289 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:17:04,289 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1740910371] [2022-11-25 22:17:04,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:17:04,290 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:17:04,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:17:04,450 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 22:17:04,450 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:17:04,450 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1740910371] [2022-11-25 22:17:04,450 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1740910371] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 22:17:04,451 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [528979553] [2022-11-25 22:17:04,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:17:04,451 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:17:04,451 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d216b91-91a8-4fa2-9614-bc20cd590896/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 22:17:04,452 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d216b91-91a8-4fa2-9614-bc20cd590896/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 22:17:04,475 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d216b91-91a8-4fa2-9614-bc20cd590896/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-25 22:17:04,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:17:04,546 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-25 22:17:04,548 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 22:17:04,573 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:17:04,610 INFO L321 Elim1Store]: treesize reduction 62, result has 31.1 percent of original size [2022-11-25 22:17:04,610 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 15 treesize of output 38 [2022-11-25 22:17:04,626 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 414 treesize of output 406 [2022-11-25 22:17:04,750 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 22:17:04,754 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 22:17:04,812 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 22:17:04,813 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [528979553] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 22:17:04,813 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2325307] [2022-11-25 22:17:04,817 INFO L159 IcfgInterpreter]: Started Sifa with 5 locations of interest [2022-11-25 22:17:04,817 INFO L166 IcfgInterpreter]: Building call graph [2022-11-25 22:17:04,817 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-25 22:17:04,817 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-25 22:17:04,817 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-25 22:17:04,855 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:17:04,856 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:17:04,858 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:17:04,859 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:17:04,861 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:17:04,862 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:17:04,863 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:17:04,864 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:17:04,865 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:17:04,867 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:17:04,868 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:17:04,870 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:17:04,871 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:17:04,872 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:17:04,874 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:17:04,875 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:17:04,876 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:17:04,877 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:17:04,882 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 26 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 45 [2022-11-25 22:17:04,923 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2022-11-25 22:17:04,940 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:17:04,941 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 32 [2022-11-25 22:17:04,957 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2022-11-25 22:17:04,993 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-25 22:17:05,008 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-25 22:17:05,022 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:17:05,024 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:17:05,025 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:17:05,026 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 36 [2022-11-25 22:17:05,232 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:17:05,234 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 22:17:05,291 INFO L321 Elim1Store]: treesize reduction 54, result has 28.0 percent of original size [2022-11-25 22:17:05,292 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 416 treesize of output 415 [2022-11-25 22:17:05,349 INFO L321 Elim1Store]: treesize reduction 41, result has 14.6 percent of original size [2022-11-25 22:17:05,350 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 416 treesize of output 396 [2022-11-25 22:17:05,400 INFO L321 Elim1Store]: treesize reduction 41, result has 14.6 percent of original size [2022-11-25 22:17:05,405 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 416 treesize of output 396 [2022-11-25 22:17:05,774 INFO L321 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-11-25 22:17:05,774 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 797 treesize of output 798 [2022-11-25 22:17:05,807 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:17:05,808 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 22:17:05,809 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 22:17:05,884 INFO L321 Elim1Store]: treesize reduction 150, result has 15.3 percent of original size [2022-11-25 22:17:05,885 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 8 case distinctions, treesize of input 824 treesize of output 774 [2022-11-25 22:17:05,948 INFO L321 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-11-25 22:17:05,949 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 789 treesize of output 790 [2022-11-25 22:17:06,461 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-25 22:17:06,470 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2022-11-25 22:17:06,479 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2022-11-25 22:17:06,501 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-25 22:17:06,512 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-25 22:17:06,522 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 22:17:06,538 INFO L321 Elim1Store]: treesize reduction 27, result has 37.2 percent of original size [2022-11-25 22:17:06,538 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 52 treesize of output 25 [2022-11-25 22:17:06,563 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2022-11-25 22:17:06,573 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-25 22:17:06,582 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2022-11-25 22:17:06,589 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-25 22:17:06,902 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '928#(and (= |ULTIMATE.start_main_~#cont~0#1.offset| 0) (<= 0 (+ 2147483648 (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) (+ |ULTIMATE.start_main_~#a~0#1.offset| (* |ULTIMATE.start_main_~j~0#1| 4))))) (= |ULTIMATE.start_main_~#dummies~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#dummies~0#1.base|) (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (<= |ULTIMATE.start_main_~i~0#1| 2147483647) (<= (+ |ULTIMATE.start_main_~#a~0#1.offset| 4 (* |ULTIMATE.start_main_~j~0#1| 4)) (select |#length| |ULTIMATE.start_main_~#a~0#1.base|)) (<= 0 (+ |ULTIMATE.start_main_~i~0#1| 2147483648)) (<= 0 |ULTIMATE.start_main_~#dummy~0#1.base|) (<= (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) (+ |ULTIMATE.start_main_~#a~0#1.offset| (* |ULTIMATE.start_main_~j~0#1| 4))) 2147483647) (<= 0 |ULTIMATE.start_main_~#cont~0#1.base|) (not (<= (+ 4 (* |ULTIMATE.start_main_~j~0#1| 4) |ULTIMATE.start_main_~#dummies~0#1.offset|) (select |#length| |ULTIMATE.start_main_~#dummies~0#1.base|))) (<= 0 (+ |ULTIMATE.start_main_~#a~0#1.offset| (* |ULTIMATE.start_main_~j~0#1| 4))) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start_main_~#dummy~0#1.offset| 0) (= (select |#valid| |ULTIMATE.start_main_~#a~0#1.base|) 1) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (< |ULTIMATE.start_main_~j~0#1| 10) (= |#NULL.base| 0))' at error location [2022-11-25 22:17:06,903 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-25 22:17:06,903 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 22:17:06,903 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 2, 2] total 7 [2022-11-25 22:17:06,903 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1007056691] [2022-11-25 22:17:06,903 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 22:17:06,904 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-25 22:17:06,904 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:17:06,904 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-25 22:17:06,904 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2022-11-25 22:17:06,905 INFO L87 Difference]: Start difference. First operand 63 states and 66 transitions. Second operand has 9 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:17:07,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:17:07,159 INFO L93 Difference]: Finished difference Result 175 states and 186 transitions. [2022-11-25 22:17:07,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-25 22:17:07,160 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 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 7 [2022-11-25 22:17:07,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:17:07,161 INFO L225 Difference]: With dead ends: 175 [2022-11-25 22:17:07,161 INFO L226 Difference]: Without dead ends: 175 [2022-11-25 22:17:07,161 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2022-11-25 22:17:07,162 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 166 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 191 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 166 SdHoareTripleChecker+Valid, 114 SdHoareTripleChecker+Invalid, 192 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 191 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-25 22:17:07,162 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [166 Valid, 114 Invalid, 192 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 191 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-25 22:17:07,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2022-11-25 22:17:07,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 71. [2022-11-25 22:17:07,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 40 states have (on average 1.9) internal successors, (76), 70 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:17:07,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 76 transitions. [2022-11-25 22:17:07,167 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 76 transitions. Word has length 7 [2022-11-25 22:17:07,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:17:07,167 INFO L495 AbstractCegarLoop]: Abstraction has 71 states and 76 transitions. [2022-11-25 22:17:07,167 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:17:07,168 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 76 transitions. [2022-11-25 22:17:07,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-25 22:17:07,168 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:17:07,168 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1] [2022-11-25 22:17:07,179 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d216b91-91a8-4fa2-9614-bc20cd590896/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-11-25 22:17:07,368 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d216b91-91a8-4fa2-9614-bc20cd590896/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:17:07,369 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2022-11-25 22:17:07,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:17:07,369 INFO L85 PathProgramCache]: Analyzing trace with hash 1267824552, now seen corresponding path program 1 times [2022-11-25 22:17:07,369 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:17:07,370 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1560743222] [2022-11-25 22:17:07,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:17:07,370 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:17:07,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:17:07,502 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-25 22:17:07,503 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:17:07,503 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1560743222] [2022-11-25 22:17:07,503 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1560743222] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 22:17:07,503 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 22:17:07,503 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-25 22:17:07,504 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [207716729] [2022-11-25 22:17:07,504 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 22:17:07,504 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-25 22:17:07,505 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:17:07,505 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-25 22:17:07,505 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-25 22:17:07,505 INFO L87 Difference]: Start difference. First operand 71 states and 76 transitions. Second operand has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:17:07,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:17:07,582 INFO L93 Difference]: Finished difference Result 70 states and 75 transitions. [2022-11-25 22:17:07,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-25 22:17:07,583 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-11-25 22:17:07,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:17:07,583 INFO L225 Difference]: With dead ends: 70 [2022-11-25 22:17:07,584 INFO L226 Difference]: Without dead ends: 70 [2022-11-25 22:17:07,584 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-25 22:17:07,585 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 52 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 62 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-25 22:17:07,585 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [52 Valid, 35 Invalid, 62 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-25 22:17:07,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2022-11-25 22:17:07,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 69. [2022-11-25 22:17:07,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 40 states have (on average 1.85) internal successors, (74), 68 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:17:07,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 74 transitions. [2022-11-25 22:17:07,589 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 74 transitions. Word has length 10 [2022-11-25 22:17:07,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:17:07,589 INFO L495 AbstractCegarLoop]: Abstraction has 69 states and 74 transitions. [2022-11-25 22:17:07,589 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:17:07,589 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 74 transitions. [2022-11-25 22:17:07,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-25 22:17:07,590 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:17:07,590 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1] [2022-11-25 22:17:07,590 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-25 22:17:07,590 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr37ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2022-11-25 22:17:07,590 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:17:07,595 INFO L85 PathProgramCache]: Analyzing trace with hash 647933896, now seen corresponding path program 1 times [2022-11-25 22:17:07,595 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:17:07,596 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [805419880] [2022-11-25 22:17:07,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:17:07,596 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:17:07,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:17:07,685 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 22:17:07,685 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:17:07,686 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [805419880] [2022-11-25 22:17:07,686 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [805419880] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 22:17:07,686 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1917574659] [2022-11-25 22:17:07,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:17:07,686 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:17:07,686 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d216b91-91a8-4fa2-9614-bc20cd590896/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 22:17:07,687 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d216b91-91a8-4fa2-9614-bc20cd590896/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 22:17:07,700 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d216b91-91a8-4fa2-9614-bc20cd590896/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-25 22:17:07,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:17:07,784 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-25 22:17:07,785 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 22:17:07,802 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 22:17:07,802 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 22:17:07,838 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 22:17:07,838 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1917574659] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 22:17:07,839 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [860789689] [2022-11-25 22:17:07,840 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2022-11-25 22:17:07,840 INFO L166 IcfgInterpreter]: Building call graph [2022-11-25 22:17:07,841 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-25 22:17:07,841 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-25 22:17:07,841 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-25 22:17:07,868 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:17:07,870 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:17:07,871 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:17:07,873 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:17:07,874 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:17:07,875 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:17:07,877 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:17:07,878 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:17:07,879 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:17:07,880 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:17:07,882 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:17:07,884 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:17:07,885 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:17:07,886 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:17:07,888 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:17:07,889 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:17:07,890 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:17:07,892 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:17:07,893 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 26 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 45 [2022-11-25 22:17:07,939 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:17:07,940 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 32 [2022-11-25 22:17:07,956 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2022-11-25 22:17:07,968 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2022-11-25 22:17:08,006 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:17:08,007 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:17:08,009 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:17:08,010 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 66 treesize of output 41 [2022-11-25 22:17:08,031 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-25 22:17:08,042 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-25 22:17:08,183 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:17:08,185 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:17:08,214 INFO L321 Elim1Store]: treesize reduction 49, result has 12.5 percent of original size [2022-11-25 22:17:08,214 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 445 treesize of output 433 [2022-11-25 22:17:08,239 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:17:08,240 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 453 treesize of output 433 [2022-11-25 22:17:08,257 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:17:08,258 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 453 treesize of output 433 [2022-11-25 22:17:08,391 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 432 treesize of output 431 [2022-11-25 22:17:08,418 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:17:08,420 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:17:08,421 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 22:17:08,423 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:17:08,473 INFO L321 Elim1Store]: treesize reduction 103, result has 16.3 percent of original size [2022-11-25 22:17:08,474 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 467 treesize of output 428 [2022-11-25 22:17:08,495 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 432 treesize of output 431 [2022-11-25 22:17:08,628 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2022-11-25 22:17:08,637 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-25 22:17:08,645 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2022-11-25 22:17:08,679 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-25 22:17:08,686 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-25 22:17:08,696 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 22:17:08,708 INFO L321 Elim1Store]: treesize reduction 27, result has 37.2 percent of original size [2022-11-25 22:17:08,709 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 52 treesize of output 25 [2022-11-25 22:17:08,787 INFO L321 Elim1Store]: treesize reduction 93, result has 14.7 percent of original size [2022-11-25 22:17:08,787 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 21 [2022-11-25 22:17:08,852 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2022-11-25 22:17:08,861 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-25 22:17:08,878 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2022-11-25 22:17:08,880 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-25 22:17:09,503 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1392#(and (<= |ULTIMATE.start_main_~i~0#1| 2147483647) (not (= |ULTIMATE.start_main_old_#valid#1| |#valid|)) (<= 0 (+ |ULTIMATE.start_main_~i~0#1| 2147483648)) (<= 10 |ULTIMATE.start_main_~j~0#1|) (or (not (< |ULTIMATE.start_main_~i~0#1| 9)) (not (<= 0 |ULTIMATE.start_main_~i~0#1|))) (= |#NULL.offset| 0) (exists ((|v_ULTIMATE.start_main_~#a~0#1.base_21| Int)) (and (<= 0 |v_ULTIMATE.start_main_~#a~0#1.base_21|) (= (select |#valid| |v_ULTIMATE.start_main_~#a~0#1.base_21|) 0))) (<= 0 |#StackHeapBarrier|) (= |ULTIMATE.start_main_#res#1| 0) (= |#NULL.base| 0))' at error location [2022-11-25 22:17:09,503 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-25 22:17:09,504 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 22:17:09,504 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 8 [2022-11-25 22:17:09,504 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1494853498] [2022-11-25 22:17:09,504 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 22:17:09,504 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-25 22:17:09,504 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:17:09,505 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-25 22:17:09,505 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2022-11-25 22:17:09,505 INFO L87 Difference]: Start difference. First operand 69 states and 74 transitions. Second operand has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 8 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) [2022-11-25 22:17:09,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:17:09,556 INFO L93 Difference]: Finished difference Result 74 states and 77 transitions. [2022-11-25 22:17:09,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-25 22:17:09,557 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 8 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) Word has length 11 [2022-11-25 22:17:09,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:17:09,557 INFO L225 Difference]: With dead ends: 74 [2022-11-25 22:17:09,557 INFO L226 Difference]: Without dead ends: 74 [2022-11-25 22:17:09,557 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2022-11-25 22:17:09,558 INFO L413 NwaCegarLoop]: 51 mSDtfsCounter, 6 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 153 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-25 22:17:09,558 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 153 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-25 22:17:09,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2022-11-25 22:17:09,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 73. [2022-11-25 22:17:09,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 44 states have (on average 1.75) internal successors, (77), 72 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:17:09,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 77 transitions. [2022-11-25 22:17:09,562 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 77 transitions. Word has length 11 [2022-11-25 22:17:09,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:17:09,563 INFO L495 AbstractCegarLoop]: Abstraction has 73 states and 77 transitions. [2022-11-25 22:17:09,563 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 8 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) [2022-11-25 22:17:09,563 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 77 transitions. [2022-11-25 22:17:09,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-11-25 22:17:09,563 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:17:09,563 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 1, 1] [2022-11-25 22:17:09,574 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d216b91-91a8-4fa2-9614-bc20cd590896/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-25 22:17:09,767 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d216b91-91a8-4fa2-9614-bc20cd590896/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2022-11-25 22:17:09,767 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2022-11-25 22:17:09,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:17:09,767 INFO L85 PathProgramCache]: Analyzing trace with hash -579117772, now seen corresponding path program 2 times [2022-11-25 22:17:09,768 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:17:09,768 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019781535] [2022-11-25 22:17:09,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:17:09,768 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:17:09,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:17:10,152 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 22:17:10,152 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:17:10,152 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019781535] [2022-11-25 22:17:10,152 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2019781535] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 22:17:10,152 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1074970033] [2022-11-25 22:17:10,152 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-25 22:17:10,152 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:17:10,153 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d216b91-91a8-4fa2-9614-bc20cd590896/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 22:17:10,154 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d216b91-91a8-4fa2-9614-bc20cd590896/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 22:17:10,179 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d216b91-91a8-4fa2-9614-bc20cd590896/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-25 22:17:10,260 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2022-11-25 22:17:10,260 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 22:17:10,261 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-25 22:17:10,264 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 22:17:10,288 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:17:10,326 INFO L321 Elim1Store]: treesize reduction 62, result has 31.1 percent of original size [2022-11-25 22:17:10,326 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 15 treesize of output 38 [2022-11-25 22:17:10,338 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 414 treesize of output 406 [2022-11-25 22:17:10,504 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-11-25 22:17:10,504 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 22:17:10,792 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-11-25 22:17:10,792 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1074970033] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 22:17:10,792 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1829881989] [2022-11-25 22:17:10,794 INFO L159 IcfgInterpreter]: Started Sifa with 5 locations of interest [2022-11-25 22:17:10,795 INFO L166 IcfgInterpreter]: Building call graph [2022-11-25 22:17:10,795 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-25 22:17:10,795 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-25 22:17:10,796 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-25 22:17:10,823 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:17:10,825 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:17:10,827 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:17:10,829 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:17:10,830 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:17:10,831 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:17:10,833 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:17:10,834 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:17:10,835 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:17:10,837 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:17:10,839 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:17:10,841 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:17:10,842 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:17:10,843 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:17:10,847 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:17:10,848 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:17:10,849 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:17:10,851 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:17:10,853 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 26 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 45 [2022-11-25 22:17:10,894 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:17:10,895 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 32 [2022-11-25 22:17:10,913 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2022-11-25 22:17:10,923 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2022-11-25 22:17:10,954 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:17:10,955 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:17:10,957 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:17:10,958 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 36 [2022-11-25 22:17:10,977 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-25 22:17:10,988 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-25 22:17:11,116 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:17:11,117 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 22:17:11,169 INFO L321 Elim1Store]: treesize reduction 54, result has 28.0 percent of original size [2022-11-25 22:17:11,169 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 416 treesize of output 415 [2022-11-25 22:17:11,224 INFO L321 Elim1Store]: treesize reduction 41, result has 14.6 percent of original size [2022-11-25 22:17:11,224 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 416 treesize of output 396 [2022-11-25 22:17:11,265 INFO L321 Elim1Store]: treesize reduction 41, result has 14.6 percent of original size [2022-11-25 22:17:11,265 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 416 treesize of output 396 [2022-11-25 22:17:11,551 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:17:11,552 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 22:17:11,553 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 22:17:11,617 INFO L321 Elim1Store]: treesize reduction 150, result has 15.3 percent of original size [2022-11-25 22:17:11,617 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 8 case distinctions, treesize of input 832 treesize of output 782 [2022-11-25 22:17:11,681 INFO L321 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-11-25 22:17:11,681 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 797 treesize of output 798 [2022-11-25 22:17:11,736 INFO L321 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-11-25 22:17:11,737 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 789 treesize of output 790 [2022-11-25 22:17:12,060 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-25 22:17:12,068 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2022-11-25 22:17:12,075 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2022-11-25 22:17:12,092 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-25 22:17:12,100 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-25 22:17:12,110 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 22:17:12,122 INFO L321 Elim1Store]: treesize reduction 27, result has 37.2 percent of original size [2022-11-25 22:17:12,123 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 52 treesize of output 25 [2022-11-25 22:17:12,144 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2022-11-25 22:17:12,150 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2022-11-25 22:17:12,159 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-25 22:17:12,172 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-25 22:17:12,513 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1650#(and (= |ULTIMATE.start_main_~#cont~0#1.offset| 0) (<= 0 (+ 2147483648 (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) (+ |ULTIMATE.start_main_~#a~0#1.offset| (* |ULTIMATE.start_main_~j~0#1| 4))))) (= |ULTIMATE.start_main_~#dummies~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#dummies~0#1.base|) (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (<= |ULTIMATE.start_main_~i~0#1| 2147483647) (<= (+ |ULTIMATE.start_main_~#a~0#1.offset| 4 (* |ULTIMATE.start_main_~j~0#1| 4)) (select |#length| |ULTIMATE.start_main_~#a~0#1.base|)) (<= 0 (+ |ULTIMATE.start_main_~i~0#1| 2147483648)) (<= 0 |ULTIMATE.start_main_~#dummy~0#1.base|) (<= (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) (+ |ULTIMATE.start_main_~#a~0#1.offset| (* |ULTIMATE.start_main_~j~0#1| 4))) 2147483647) (<= 0 |ULTIMATE.start_main_~#cont~0#1.base|) (not (<= (+ 4 (* |ULTIMATE.start_main_~j~0#1| 4) |ULTIMATE.start_main_~#dummies~0#1.offset|) (select |#length| |ULTIMATE.start_main_~#dummies~0#1.base|))) (<= 0 (+ |ULTIMATE.start_main_~#a~0#1.offset| (* |ULTIMATE.start_main_~j~0#1| 4))) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start_main_~#dummy~0#1.offset| 0) (= (select |#valid| |ULTIMATE.start_main_~#a~0#1.base|) 1) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (< |ULTIMATE.start_main_~j~0#1| 10) (= |#NULL.base| 0))' at error location [2022-11-25 22:17:12,513 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-25 22:17:12,513 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 22:17:12,514 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 3, 3] total 12 [2022-11-25 22:17:12,514 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2058772686] [2022-11-25 22:17:12,514 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 22:17:12,514 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-25 22:17:12,514 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:17:12,515 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-25 22:17:12,515 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2022-11-25 22:17:12,516 INFO L87 Difference]: Start difference. First operand 73 states and 77 transitions. Second operand has 14 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 13 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) [2022-11-25 22:17:12,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:17:12,876 INFO L93 Difference]: Finished difference Result 73 states and 76 transitions. [2022-11-25 22:17:12,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-25 22:17:12,876 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 13 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) Word has length 16 [2022-11-25 22:17:12,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:17:12,877 INFO L225 Difference]: With dead ends: 73 [2022-11-25 22:17:12,877 INFO L226 Difference]: Without dead ends: 73 [2022-11-25 22:17:12,877 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=122, Invalid=430, Unknown=0, NotChecked=0, Total=552 [2022-11-25 22:17:12,878 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 62 mSDsluCounter, 71 mSDsCounter, 0 mSdLazyCounter, 216 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 94 SdHoareTripleChecker+Invalid, 223 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 216 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-25 22:17:12,878 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [62 Valid, 94 Invalid, 223 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 216 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-25 22:17:12,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2022-11-25 22:17:12,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 72. [2022-11-25 22:17:12,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 44 states have (on average 1.7045454545454546) internal successors, (75), 71 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:17:12,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 75 transitions. [2022-11-25 22:17:12,881 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 75 transitions. Word has length 16 [2022-11-25 22:17:12,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:17:12,882 INFO L495 AbstractCegarLoop]: Abstraction has 72 states and 75 transitions. [2022-11-25 22:17:12,882 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 13 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) [2022-11-25 22:17:12,882 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 75 transitions. [2022-11-25 22:17:12,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-11-25 22:17:12,882 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:17:12,883 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 1, 1, 1, 1, 1] [2022-11-25 22:17:12,889 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d216b91-91a8-4fa2-9614-bc20cd590896/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-25 22:17:13,088 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d216b91-91a8-4fa2-9614-bc20cd590896/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:17:13,089 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr37ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2022-11-25 22:17:13,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:17:13,089 INFO L85 PathProgramCache]: Analyzing trace with hash -10096312, now seen corresponding path program 2 times [2022-11-25 22:17:13,089 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:17:13,089 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1086900868] [2022-11-25 22:17:13,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:17:13,089 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:17:13,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:17:13,321 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 22:17:13,322 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:17:13,322 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1086900868] [2022-11-25 22:17:13,322 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1086900868] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 22:17:13,322 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [191424858] [2022-11-25 22:17:13,322 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-25 22:17:13,323 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:17:13,323 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d216b91-91a8-4fa2-9614-bc20cd590896/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 22:17:13,324 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d216b91-91a8-4fa2-9614-bc20cd590896/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 22:17:13,355 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d216b91-91a8-4fa2-9614-bc20cd590896/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-25 22:17:13,441 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2022-11-25 22:17:13,442 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 22:17:13,443 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 36 conjunts are in the unsatisfiable core [2022-11-25 22:17:13,447 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 22:17:13,849 WARN L859 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_main_~#dummies~0#1.base_22| Int) (|v_ULTIMATE.start_main_~#cont~0#1.base_17| Int) (|v_ULTIMATE.start_main_~#a~0#1.base_22| Int) (|v_ULTIMATE.start_main_~#dummy~0#1.base_14| Int) (v_ArrVal_648 Int) (v_ArrVal_647 Int)) (let ((.cse1 (store |c_ULTIMATE.start_main_old_#valid#1| |v_ULTIMATE.start_main_~#cont~0#1.base_17| 1))) (let ((.cse0 (store .cse1 |v_ULTIMATE.start_main_~#dummy~0#1.base_14| 1))) (and (= (select (store .cse0 |v_ULTIMATE.start_main_~#dummies~0#1.base_22| 1) |v_ULTIMATE.start_main_~#a~0#1.base_22|) 0) (= |c_#valid| (store (store (store (store (store (store .cse0 |v_ULTIMATE.start_main_~#dummies~0#1.base_22| v_ArrVal_648) |v_ULTIMATE.start_main_~#a~0#1.base_22| v_ArrVal_647) |v_ULTIMATE.start_main_~#cont~0#1.base_17| 0) |v_ULTIMATE.start_main_~#dummy~0#1.base_14| 0) |v_ULTIMATE.start_main_~#dummies~0#1.base_22| 0) |v_ULTIMATE.start_main_~#a~0#1.base_22| 0)) (= (select |c_ULTIMATE.start_main_old_#valid#1| |v_ULTIMATE.start_main_~#cont~0#1.base_17|) 0) (= (select .cse1 |v_ULTIMATE.start_main_~#dummy~0#1.base_14|) 0) (= (select .cse0 |v_ULTIMATE.start_main_~#dummies~0#1.base_22|) 0))))) is different from true [2022-11-25 22:17:13,850 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2022-11-25 22:17:13,851 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 22:17:13,851 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [191424858] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 22:17:13,851 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-25 22:17:13,851 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [8] total 10 [2022-11-25 22:17:13,851 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [822463824] [2022-11-25 22:17:13,852 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 22:17:13,852 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-25 22:17:13,852 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:17:13,853 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-25 22:17:13,853 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=53, Unknown=1, NotChecked=16, Total=110 [2022-11-25 22:17:13,853 INFO L87 Difference]: Start difference. First operand 72 states and 75 transitions. Second operand has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:17:13,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:17:13,933 INFO L93 Difference]: Finished difference Result 68 states and 71 transitions. [2022-11-25 22:17:13,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-25 22:17:13,939 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-11-25 22:17:13,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:17:13,940 INFO L225 Difference]: With dead ends: 68 [2022-11-25 22:17:13,940 INFO L226 Difference]: Without dead ends: 66 [2022-11-25 22:17:13,940 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=53, Unknown=1, NotChecked=16, Total=110 [2022-11-25 22:17:13,946 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 48 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 94 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 54 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-25 22:17:13,947 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [48 Valid, 19 Invalid, 94 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 37 Invalid, 0 Unknown, 54 Unchecked, 0.1s Time] [2022-11-25 22:17:13,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2022-11-25 22:17:13,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2022-11-25 22:17:13,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 42 states have (on average 1.5952380952380953) internal successors, (67), 65 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:17:13,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 67 transitions. [2022-11-25 22:17:13,951 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 67 transitions. Word has length 23 [2022-11-25 22:17:13,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:17:13,958 INFO L495 AbstractCegarLoop]: Abstraction has 66 states and 67 transitions. [2022-11-25 22:17:13,958 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:17:13,958 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 67 transitions. [2022-11-25 22:17:13,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-11-25 22:17:13,959 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:17:13,959 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 1, 1, 1, 1, 1] [2022-11-25 22:17:13,968 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d216b91-91a8-4fa2-9614-bc20cd590896/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-25 22:17:14,160 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d216b91-91a8-4fa2-9614-bc20cd590896/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-25 22:17:14,160 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2022-11-25 22:17:14,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:17:14,161 INFO L85 PathProgramCache]: Analyzing trace with hash -10174791, now seen corresponding path program 1 times [2022-11-25 22:17:14,161 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:17:14,161 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [73473268] [2022-11-25 22:17:14,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:17:14,161 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:17:14,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:17:14,327 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 22:17:14,328 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:17:14,328 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [73473268] [2022-11-25 22:17:14,328 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [73473268] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 22:17:14,328 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1987813168] [2022-11-25 22:17:14,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:17:14,328 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:17:14,329 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d216b91-91a8-4fa2-9614-bc20cd590896/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 22:17:14,330 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d216b91-91a8-4fa2-9614-bc20cd590896/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 22:17:14,359 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d216b91-91a8-4fa2-9614-bc20cd590896/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-25 22:17:14,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:17:14,492 INFO L263 TraceCheckSpWp]: Trace formula consists of 326 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-25 22:17:14,494 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 22:17:14,527 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 22:17:14,527 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 22:17:14,601 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 22:17:14,601 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1987813168] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 22:17:14,601 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1582068416] [2022-11-25 22:17:14,603 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2022-11-25 22:17:14,603 INFO L166 IcfgInterpreter]: Building call graph [2022-11-25 22:17:14,603 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-25 22:17:14,604 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-25 22:17:14,604 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-25 22:17:14,626 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:17:14,627 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:17:14,629 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:17:14,631 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:17:14,632 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:17:14,634 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:17:14,635 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:17:14,636 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:17:14,637 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:17:14,639 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:17:14,640 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:17:14,642 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:17:14,643 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:17:14,645 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:17:14,646 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:17:14,647 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:17:14,649 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:17:14,650 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:17:14,651 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 26 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 45 [2022-11-25 22:17:14,689 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:17:14,691 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 32 [2022-11-25 22:17:14,706 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2022-11-25 22:17:14,717 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2022-11-25 22:17:14,746 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:17:14,747 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:17:14,749 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:17:14,750 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 36 [2022-11-25 22:17:14,767 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-25 22:17:14,776 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-25 22:17:14,915 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:17:14,916 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 22:17:14,970 INFO L321 Elim1Store]: treesize reduction 54, result has 28.0 percent of original size [2022-11-25 22:17:14,971 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 416 treesize of output 415 [2022-11-25 22:17:15,023 INFO L321 Elim1Store]: treesize reduction 41, result has 14.6 percent of original size [2022-11-25 22:17:15,024 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 416 treesize of output 396 [2022-11-25 22:17:15,078 INFO L321 Elim1Store]: treesize reduction 41, result has 14.6 percent of original size [2022-11-25 22:17:15,078 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 416 treesize of output 396 [2022-11-25 22:17:15,356 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:17:15,360 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 22:17:15,361 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 22:17:15,425 INFO L321 Elim1Store]: treesize reduction 150, result has 15.3 percent of original size [2022-11-25 22:17:15,426 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 8 case distinctions, treesize of input 832 treesize of output 782 [2022-11-25 22:17:15,493 INFO L321 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-11-25 22:17:15,493 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 797 treesize of output 798 [2022-11-25 22:17:15,549 INFO L321 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-11-25 22:17:15,549 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 789 treesize of output 790 [2022-11-25 22:17:15,853 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-25 22:17:15,860 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2022-11-25 22:17:15,866 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2022-11-25 22:17:15,882 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-25 22:17:15,891 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-25 22:17:15,900 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 22:17:15,913 INFO L321 Elim1Store]: treesize reduction 27, result has 37.2 percent of original size [2022-11-25 22:17:15,914 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 52 treesize of output 25 [2022-11-25 22:17:15,934 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-25 22:17:15,941 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2022-11-25 22:17:15,949 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2022-11-25 22:17:15,968 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-25 22:17:15,975 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2022-11-25 22:17:15,982 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2022-11-25 22:17:15,986 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-25 22:17:16,445 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2167#(and (= |ULTIMATE.start_main_~#cont~0#1.offset| 0) (= |ULTIMATE.start_main_~#dummies~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#dummies~0#1.base|) (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) (+ |ULTIMATE.start_main_~#a~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4))) |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_main_~#dummy~0#1.base|) (<= 10 |ULTIMATE.start_main_~j~0#1|) (<= (+ |ULTIMATE.start_main_~#a~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4) 4) (select |#length| |ULTIMATE.start_main_~#a~0#1.base|)) (< (select |#length| |ULTIMATE.start_main_~#dummy~0#1.base|) (+ 4 |ULTIMATE.start_main_~#dummy~0#1.offset|)) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_main_~#cont~0#1.base|) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (< |ULTIMATE.start_main_~i~0#1| 9) (= |ULTIMATE.start_main_~#dummy~0#1.offset| 0) (= (select |#valid| |ULTIMATE.start_main_~#a~0#1.base|) 1) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-25 22:17:16,446 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-25 22:17:16,446 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 22:17:16,446 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 12 [2022-11-25 22:17:16,446 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [661192790] [2022-11-25 22:17:16,446 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 22:17:16,447 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-25 22:17:16,447 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:17:16,447 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-25 22:17:16,447 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=274, Unknown=0, NotChecked=0, Total=380 [2022-11-25 22:17:16,448 INFO L87 Difference]: Start difference. First operand 66 states and 67 transitions. Second operand has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 12 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:17:16,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:17:16,524 INFO L93 Difference]: Finished difference Result 78 states and 79 transitions. [2022-11-25 22:17:16,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-25 22:17:16,525 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 12 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-11-25 22:17:16,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:17:16,526 INFO L225 Difference]: With dead ends: 78 [2022-11-25 22:17:16,526 INFO L226 Difference]: Without dead ends: 78 [2022-11-25 22:17:16,527 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 53 SyntacticMatches, 4 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=106, Invalid=274, Unknown=0, NotChecked=0, Total=380 [2022-11-25 22:17:16,528 INFO L413 NwaCegarLoop]: 43 mSDtfsCounter, 2 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-25 22:17:16,529 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 86 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-25 22:17:16,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2022-11-25 22:17:16,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2022-11-25 22:17:16,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 54 states have (on average 1.462962962962963) internal successors, (79), 77 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:17:16,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 79 transitions. [2022-11-25 22:17:16,542 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 79 transitions. Word has length 23 [2022-11-25 22:17:16,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:17:16,542 INFO L495 AbstractCegarLoop]: Abstraction has 78 states and 79 transitions. [2022-11-25 22:17:16,542 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 12 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:17:16,543 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 79 transitions. [2022-11-25 22:17:16,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-11-25 22:17:16,543 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:17:16,543 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 1, 1, 1, 1, 1] [2022-11-25 22:17:16,554 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d216b91-91a8-4fa2-9614-bc20cd590896/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-25 22:17:16,749 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d216b91-91a8-4fa2-9614-bc20cd590896/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:17:16,749 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2022-11-25 22:17:16,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:17:16,750 INFO L85 PathProgramCache]: Analyzing trace with hash 1809170489, now seen corresponding path program 2 times [2022-11-25 22:17:16,750 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:17:16,750 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [404218041] [2022-11-25 22:17:16,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:17:16,750 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:17:16,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:17:17,291 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2022-11-25 22:17:17,291 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:17:17,291 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [404218041] [2022-11-25 22:17:17,292 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [404218041] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 22:17:17,292 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 22:17:17,292 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-25 22:17:17,292 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2043492249] [2022-11-25 22:17:17,292 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 22:17:17,294 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-25 22:17:17,294 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:17:17,294 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-25 22:17:17,294 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-25 22:17:17,295 INFO L87 Difference]: Start difference. First operand 78 states and 79 transitions. Second operand has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:17:17,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:17:17,347 INFO L93 Difference]: Finished difference Result 77 states and 78 transitions. [2022-11-25 22:17:17,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 22:17:17,348 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2022-11-25 22:17:17,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:17:17,348 INFO L225 Difference]: With dead ends: 77 [2022-11-25 22:17:17,348 INFO L226 Difference]: Without dead ends: 77 [2022-11-25 22:17:17,349 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-25 22:17:17,349 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 44 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-25 22:17:17,350 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 17 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-25 22:17:17,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2022-11-25 22:17:17,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 77. [2022-11-25 22:17:17,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 54 states have (on average 1.4444444444444444) internal successors, (78), 76 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:17:17,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 78 transitions. [2022-11-25 22:17:17,362 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 78 transitions. Word has length 35 [2022-11-25 22:17:17,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:17:17,365 INFO L495 AbstractCegarLoop]: Abstraction has 77 states and 78 transitions. [2022-11-25 22:17:17,365 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:17:17,365 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 78 transitions. [2022-11-25 22:17:17,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-11-25 22:17:17,367 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:17:17,367 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 1, 1, 1, 1, 1, 1] [2022-11-25 22:17:17,367 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-11-25 22:17:17,368 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2022-11-25 22:17:17,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:17:17,368 INFO L85 PathProgramCache]: Analyzing trace with hash 249710283, now seen corresponding path program 1 times [2022-11-25 22:17:17,368 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:17:17,368 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1398835400] [2022-11-25 22:17:17,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:17:17,369 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:17:17,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:17:17,831 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 108 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 22:17:17,832 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:17:17,832 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1398835400] [2022-11-25 22:17:17,832 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1398835400] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 22:17:17,832 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2103162648] [2022-11-25 22:17:17,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:17:17,832 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:17:17,832 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d216b91-91a8-4fa2-9614-bc20cd590896/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 22:17:17,835 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d216b91-91a8-4fa2-9614-bc20cd590896/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 22:17:17,857 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d216b91-91a8-4fa2-9614-bc20cd590896/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-25 22:17:18,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:17:18,053 INFO L263 TraceCheckSpWp]: Trace formula consists of 490 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-25 22:17:18,055 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 22:17:18,339 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 135 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 22:17:18,339 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 22:17:18,410 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 21 [2022-11-25 22:17:18,775 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 135 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 22:17:18,776 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2103162648] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 22:17:18,776 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [371917338] [2022-11-25 22:17:18,778 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-11-25 22:17:18,778 INFO L166 IcfgInterpreter]: Building call graph [2022-11-25 22:17:18,778 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-25 22:17:18,779 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-25 22:17:18,779 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-25 22:17:18,799 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:17:18,801 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:17:18,802 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:17:18,804 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:17:18,805 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:17:18,807 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:17:18,808 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:17:18,809 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:17:18,811 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:17:18,812 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:17:18,814 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:17:18,815 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:17:18,817 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:17:18,818 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:17:18,819 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:17:18,821 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:17:18,822 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:17:18,823 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:17:18,825 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 26 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 45 [2022-11-25 22:17:18,867 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:17:18,870 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 32 [2022-11-25 22:17:18,882 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2022-11-25 22:17:18,893 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2022-11-25 22:17:18,919 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-25 22:17:18,929 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-25 22:17:18,945 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:17:18,946 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:17:18,948 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:17:18,949 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 36 [2022-11-25 22:17:19,110 INFO L321 Elim1Store]: treesize reduction 41, result has 14.6 percent of original size [2022-11-25 22:17:19,110 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 424 treesize of output 404 [2022-11-25 22:17:19,130 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:17:19,131 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 22:17:19,187 INFO L321 Elim1Store]: treesize reduction 54, result has 28.0 percent of original size [2022-11-25 22:17:19,188 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 416 treesize of output 415 [2022-11-25 22:17:19,239 INFO L321 Elim1Store]: treesize reduction 41, result has 14.6 percent of original size [2022-11-25 22:17:19,240 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 416 treesize of output 396 [2022-11-25 22:17:19,496 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:17:19,497 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 22:17:19,498 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 22:17:19,575 INFO L321 Elim1Store]: treesize reduction 150, result has 15.3 percent of original size [2022-11-25 22:17:19,575 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 8 case distinctions, treesize of input 832 treesize of output 782 [2022-11-25 22:17:19,629 INFO L321 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-11-25 22:17:19,629 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 797 treesize of output 798 [2022-11-25 22:17:19,665 INFO L321 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-11-25 22:17:19,665 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 789 treesize of output 790 [2022-11-25 22:17:20,146 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2022-11-25 22:17:20,153 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2022-11-25 22:17:20,159 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-25 22:17:20,175 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-25 22:17:20,184 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-25 22:17:20,192 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 22:17:20,204 INFO L321 Elim1Store]: treesize reduction 27, result has 37.2 percent of original size [2022-11-25 22:17:20,205 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 52 treesize of output 25 [2022-11-25 22:17:20,227 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2022-11-25 22:17:20,236 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2022-11-25 22:17:20,242 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-25 22:17:20,262 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-25 22:17:20,287 INFO L321 Elim1Store]: treesize reduction 29, result has 44.2 percent of original size [2022-11-25 22:17:20,287 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 27 [2022-11-25 22:17:20,298 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-25 22:17:20,317 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2022-11-25 22:17:20,324 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-25 22:17:20,334 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2022-11-25 22:17:20,336 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-25 22:17:21,140 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2736#(and (= |ULTIMATE.start_main_~#cont~0#1.offset| 0) (= |ULTIMATE.start_main_~#dummies~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#dummies~0#1.base|) (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (= (select |#valid| |ULTIMATE.start_main_~#dummy~0#1.base|) 1) (or (and (= |ULTIMATE.start_main_~#dummy~0#1.base| |ULTIMATE.start_main_~#a~0#1.base|) (= (+ |ULTIMATE.start_main_~#a~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4)) |ULTIMATE.start_main_~#dummy~0#1.offset|)) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) (+ |ULTIMATE.start_main_~#a~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4))) |ULTIMATE.start_main_~i~0#1|)) (<= (+ 4 |ULTIMATE.start_main_~#dummy~0#1.offset|) (select |#length| |ULTIMATE.start_main_~#dummy~0#1.base|)) (<= 0 |ULTIMATE.start_main_~#dummy~0#1.base|) (<= 10 |ULTIMATE.start_main_~j~0#1|) (<= (+ |ULTIMATE.start_main_~#a~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4) 4) (select |#length| |ULTIMATE.start_main_~#a~0#1.base|)) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_main_~#cont~0#1.base|) (= (+ |ULTIMATE.start_main_~#a~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4)) (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_main_~#dummy~0#1.base|) |ULTIMATE.start_main_~#dummy~0#1.offset|)) (not (<= (+ 8 (* |ULTIMATE.start_main_~i~0#1| 4) |ULTIMATE.start_main_~#dummies~0#1.offset|) (select |#length| |ULTIMATE.start_main_~#dummies~0#1.base|))) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (< |ULTIMATE.start_main_~i~0#1| 9) (= |ULTIMATE.start_main_~#dummy~0#1.offset| 0) (= (select |#valid| |ULTIMATE.start_main_~#a~0#1.base|) 1) (= (select (select |#memory_$Pointer$.base| |ULTIMATE.start_main_~#dummy~0#1.base|) |ULTIMATE.start_main_~#dummy~0#1.offset|) |ULTIMATE.start_main_~#a~0#1.base|) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-25 22:17:21,140 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-25 22:17:21,141 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 22:17:21,141 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 36 [2022-11-25 22:17:21,141 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [884028495] [2022-11-25 22:17:21,141 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 22:17:21,141 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-11-25 22:17:21,142 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:17:21,142 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-11-25 22:17:21,143 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=553, Invalid=1517, Unknown=0, NotChecked=0, Total=2070 [2022-11-25 22:17:21,144 INFO L87 Difference]: Start difference. First operand 77 states and 78 transitions. Second operand has 38 states, 37 states have (on average 2.918918918918919) internal successors, (108), 37 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:17:21,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:17:21,705 INFO L93 Difference]: Finished difference Result 75 states and 76 transitions. [2022-11-25 22:17:21,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-25 22:17:21,706 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 37 states have (on average 2.918918918918919) internal successors, (108), 37 states have internal predecessors, (108), 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 36 [2022-11-25 22:17:21,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:17:21,707 INFO L225 Difference]: With dead ends: 75 [2022-11-25 22:17:21,707 INFO L226 Difference]: Without dead ends: 75 [2022-11-25 22:17:21,709 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1151 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=841, Invalid=2351, Unknown=0, NotChecked=0, Total=3192 [2022-11-25 22:17:21,710 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 449 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 370 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 449 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 374 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 370 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-25 22:17:21,711 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [449 Valid, 53 Invalid, 374 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 370 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-25 22:17:21,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2022-11-25 22:17:21,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2022-11-25 22:17:21,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 54 states have (on average 1.4074074074074074) internal successors, (76), 74 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:17:21,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 76 transitions. [2022-11-25 22:17:21,714 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 76 transitions. Word has length 36 [2022-11-25 22:17:21,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:17:21,714 INFO L495 AbstractCegarLoop]: Abstraction has 75 states and 76 transitions. [2022-11-25 22:17:21,714 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 37 states have (on average 2.918918918918919) internal successors, (108), 37 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:17:21,714 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 76 transitions. [2022-11-25 22:17:21,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-11-25 22:17:21,719 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:17:21,719 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 22:17:21,731 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d216b91-91a8-4fa2-9614-bc20cd590896/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-25 22:17:21,925 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d216b91-91a8-4fa2-9614-bc20cd590896/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:17:21,926 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2022-11-25 22:17:21,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:17:21,926 INFO L85 PathProgramCache]: Analyzing trace with hash -848915844, now seen corresponding path program 1 times [2022-11-25 22:17:21,926 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:17:21,926 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [738918117] [2022-11-25 22:17:21,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:17:21,927 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:17:22,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:17:22,628 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2022-11-25 22:17:22,632 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:17:22,632 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [738918117] [2022-11-25 22:17:22,632 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [738918117] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 22:17:22,633 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 22:17:22,633 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-25 22:17:22,633 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [469715284] [2022-11-25 22:17:22,633 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 22:17:22,633 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-25 22:17:22,634 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:17:22,634 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-25 22:17:22,635 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-25 22:17:22,635 INFO L87 Difference]: Start difference. First operand 75 states and 76 transitions. Second operand has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:17:22,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:17:22,681 INFO L93 Difference]: Finished difference Result 73 states and 74 transitions. [2022-11-25 22:17:22,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 22:17:22,682 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2022-11-25 22:17:22,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:17:22,682 INFO L225 Difference]: With dead ends: 73 [2022-11-25 22:17:22,682 INFO L226 Difference]: Without dead ends: 73 [2022-11-25 22:17:22,683 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-25 22:17:22,683 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 38 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-25 22:17:22,684 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 16 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-25 22:17:22,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2022-11-25 22:17:22,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 73. [2022-11-25 22:17:22,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 54 states have (on average 1.3703703703703705) internal successors, (74), 72 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:17:22,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 74 transitions. [2022-11-25 22:17:22,686 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 74 transitions. Word has length 37 [2022-11-25 22:17:22,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:17:22,686 INFO L495 AbstractCegarLoop]: Abstraction has 73 states and 74 transitions. [2022-11-25 22:17:22,687 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:17:22,687 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 74 transitions. [2022-11-25 22:17:22,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-11-25 22:17:22,687 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:17:22,687 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 22:17:22,688 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-11-25 22:17:22,688 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2022-11-25 22:17:22,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:17:22,688 INFO L85 PathProgramCache]: Analyzing trace with hash 235659454, now seen corresponding path program 1 times [2022-11-25 22:17:22,689 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:17:22,689 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2097341019] [2022-11-25 22:17:22,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:17:22,689 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:17:22,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:17:22,928 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 117 trivial. 0 not checked. [2022-11-25 22:17:22,928 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:17:22,929 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2097341019] [2022-11-25 22:17:22,929 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2097341019] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 22:17:22,929 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 22:17:22,929 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-25 22:17:22,929 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1519508061] [2022-11-25 22:17:22,929 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 22:17:22,930 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-25 22:17:22,930 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:17:22,930 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-25 22:17:22,930 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-25 22:17:22,931 INFO L87 Difference]: Start difference. First operand 73 states and 74 transitions. Second operand has 5 states, 4 states have (on average 3.75) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:17:23,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:17:23,011 INFO L93 Difference]: Finished difference Result 72 states and 73 transitions. [2022-11-25 22:17:23,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-25 22:17:23,011 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.75) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2022-11-25 22:17:23,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:17:23,012 INFO L225 Difference]: With dead ends: 72 [2022-11-25 22:17:23,012 INFO L226 Difference]: Without dead ends: 72 [2022-11-25 22:17:23,013 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-11-25 22:17:23,013 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 75 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 64 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-25 22:17:23,014 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [75 Valid, 31 Invalid, 64 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 63 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-25 22:17:23,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2022-11-25 22:17:23,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 72. [2022-11-25 22:17:23,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 54 states have (on average 1.3518518518518519) internal successors, (73), 71 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:17:23,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 73 transitions. [2022-11-25 22:17:23,016 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 73 transitions. Word has length 39 [2022-11-25 22:17:23,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:17:23,017 INFO L495 AbstractCegarLoop]: Abstraction has 72 states and 73 transitions. [2022-11-25 22:17:23,017 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.75) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:17:23,017 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 73 transitions. [2022-11-25 22:17:23,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-11-25 22:17:23,017 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:17:23,018 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 22:17:23,018 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-11-25 22:17:23,018 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2022-11-25 22:17:23,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:17:23,019 INFO L85 PathProgramCache]: Analyzing trace with hash 235659455, now seen corresponding path program 1 times [2022-11-25 22:17:23,019 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:17:23,019 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [810618252] [2022-11-25 22:17:23,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:17:23,019 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:17:23,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:17:23,530 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2022-11-25 22:17:23,530 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:17:23,530 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [810618252] [2022-11-25 22:17:23,530 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [810618252] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 22:17:23,530 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 22:17:23,531 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-25 22:17:23,531 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2109302617] [2022-11-25 22:17:23,531 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 22:17:23,531 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-25 22:17:23,531 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:17:23,532 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-25 22:17:23,532 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2022-11-25 22:17:23,532 INFO L87 Difference]: Start difference. First operand 72 states and 73 transitions. Second operand has 7 states, 6 states have (on average 2.0) internal successors, (12), 6 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:17:23,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:17:23,649 INFO L93 Difference]: Finished difference Result 71 states and 72 transitions. [2022-11-25 22:17:23,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-25 22:17:23,649 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.0) internal successors, (12), 6 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2022-11-25 22:17:23,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:17:23,650 INFO L225 Difference]: With dead ends: 71 [2022-11-25 22:17:23,650 INFO L226 Difference]: Without dead ends: 71 [2022-11-25 22:17:23,650 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2022-11-25 22:17:23,651 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 65 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 82 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-25 22:17:23,651 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [65 Valid, 61 Invalid, 82 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 82 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-25 22:17:23,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2022-11-25 22:17:23,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 71. [2022-11-25 22:17:23,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 54 states have (on average 1.3333333333333333) internal successors, (72), 70 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:17:23,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 72 transitions. [2022-11-25 22:17:23,653 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 72 transitions. Word has length 39 [2022-11-25 22:17:23,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:17:23,653 INFO L495 AbstractCegarLoop]: Abstraction has 71 states and 72 transitions. [2022-11-25 22:17:23,653 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.0) internal successors, (12), 6 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:17:23,653 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 72 transitions. [2022-11-25 22:17:23,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-11-25 22:17:23,654 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:17:23,654 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 22:17:23,654 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-11-25 22:17:23,654 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr16REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2022-11-25 22:17:23,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:17:23,654 INFO L85 PathProgramCache]: Analyzing trace with hash -1284491504, now seen corresponding path program 1 times [2022-11-25 22:17:23,655 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:17:23,655 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2131431480] [2022-11-25 22:17:23,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:17:23,655 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:17:23,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-25 22:17:23,815 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-25 22:17:24,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-25 22:17:24,087 INFO L130 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2022-11-25 22:17:24,087 INFO L360 BasicCegarLoop]: Counterexample is feasible [2022-11-25 22:17:24,089 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr16REQUIRES_VIOLATIONMEMORY_DEREFERENCE (37 of 38 remaining) [2022-11-25 22:17:24,090 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (36 of 38 remaining) [2022-11-25 22:17:24,092 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (35 of 38 remaining) [2022-11-25 22:17:24,093 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (34 of 38 remaining) [2022-11-25 22:17:24,093 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (33 of 38 remaining) [2022-11-25 22:17:24,093 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (32 of 38 remaining) [2022-11-25 22:17:24,093 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (31 of 38 remaining) [2022-11-25 22:17:24,093 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (30 of 38 remaining) [2022-11-25 22:17:24,093 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (29 of 38 remaining) [2022-11-25 22:17:24,094 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (28 of 38 remaining) [2022-11-25 22:17:24,094 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (27 of 38 remaining) [2022-11-25 22:17:24,094 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (26 of 38 remaining) [2022-11-25 22:17:24,095 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE (25 of 38 remaining) [2022-11-25 22:17:24,095 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (24 of 38 remaining) [2022-11-25 22:17:24,095 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (23 of 38 remaining) [2022-11-25 22:17:24,095 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE (22 of 38 remaining) [2022-11-25 22:17:24,095 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE (21 of 38 remaining) [2022-11-25 22:17:24,096 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr17REQUIRES_VIOLATIONMEMORY_DEREFERENCE (20 of 38 remaining) [2022-11-25 22:17:24,096 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr18REQUIRES_VIOLATIONMEMORY_DEREFERENCE (19 of 38 remaining) [2022-11-25 22:17:24,096 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr19REQUIRES_VIOLATIONMEMORY_DEREFERENCE (18 of 38 remaining) [2022-11-25 22:17:24,096 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr20REQUIRES_VIOLATIONMEMORY_DEREFERENCE (17 of 38 remaining) [2022-11-25 22:17:24,096 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr21REQUIRES_VIOLATIONMEMORY_DEREFERENCE (16 of 38 remaining) [2022-11-25 22:17:24,096 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr22REQUIRES_VIOLATIONMEMORY_DEREFERENCE (15 of 38 remaining) [2022-11-25 22:17:24,097 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr23REQUIRES_VIOLATIONMEMORY_DEREFERENCE (14 of 38 remaining) [2022-11-25 22:17:24,097 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr24REQUIRES_VIOLATIONMEMORY_DEREFERENCE (13 of 38 remaining) [2022-11-25 22:17:24,097 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr25REQUIRES_VIOLATIONMEMORY_DEREFERENCE (12 of 38 remaining) [2022-11-25 22:17:24,097 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr26REQUIRES_VIOLATIONMEMORY_DEREFERENCE (11 of 38 remaining) [2022-11-25 22:17:24,097 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr27REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 38 remaining) [2022-11-25 22:17:24,097 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr28REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 38 remaining) [2022-11-25 22:17:24,098 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr29REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 38 remaining) [2022-11-25 22:17:24,098 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr30REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 38 remaining) [2022-11-25 22:17:24,098 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr31REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 38 remaining) [2022-11-25 22:17:24,098 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr32REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 38 remaining) [2022-11-25 22:17:24,098 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr33REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 38 remaining) [2022-11-25 22:17:24,099 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr34REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 38 remaining) [2022-11-25 22:17:24,099 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr35REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 38 remaining) [2022-11-25 22:17:24,099 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr36ASSERT_VIOLATIONMEMORY_LEAK (1 of 38 remaining) [2022-11-25 22:17:24,099 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr37ASSERT_VIOLATIONMEMORY_LEAK (0 of 38 remaining) [2022-11-25 22:17:24,099 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-11-25 22:17:24,102 INFO L445 BasicCegarLoop]: Path program histogram: [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 22:17:24,108 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-11-25 22:17:24,173 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 25.11 10:17:24 BoogieIcfgContainer [2022-11-25 22:17:24,177 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-11-25 22:17:24,178 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-11-25 22:17:24,178 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-11-25 22:17:24,178 INFO L275 PluginConnector]: Witness Printer initialized [2022-11-25 22:17:24,178 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 10:16:59" (3/4) ... [2022-11-25 22:17:24,182 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2022-11-25 22:17:24,241 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d216b91-91a8-4fa2-9614-bc20cd590896/bin/utaipan-ByfvJB40ur/witness.graphml [2022-11-25 22:17:24,241 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-11-25 22:17:24,246 INFO L158 Benchmark]: Toolchain (without parser) took 26266.41ms. Allocated memory was 134.2MB in the beginning and 339.7MB in the end (delta: 205.5MB). Free memory was 97.0MB in the beginning and 276.9MB in the end (delta: -179.9MB). Peak memory consumption was 28.0MB. Max. memory is 16.1GB. [2022-11-25 22:17:24,246 INFO L158 Benchmark]: CDTParser took 0.29ms. Allocated memory is still 107.0MB. Free memory is still 58.5MB. There was no memory consumed. Max. memory is 16.1GB. [2022-11-25 22:17:24,246 INFO L158 Benchmark]: CACSL2BoogieTranslator took 268.11ms. Allocated memory is still 134.2MB. Free memory was 97.0MB in the beginning and 86.1MB in the end (delta: 10.9MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-11-25 22:17:24,247 INFO L158 Benchmark]: Boogie Procedure Inliner took 39.57ms. Allocated memory is still 134.2MB. Free memory was 86.1MB in the beginning and 84.5MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-11-25 22:17:24,248 INFO L158 Benchmark]: Boogie Preprocessor took 53.22ms. Allocated memory is still 134.2MB. Free memory was 84.5MB in the beginning and 82.8MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-11-25 22:17:24,248 INFO L158 Benchmark]: RCFGBuilder took 713.18ms. Allocated memory is still 134.2MB. Free memory was 82.8MB in the beginning and 60.7MB in the end (delta: 22.2MB). Peak memory consumption was 21.0MB. Max. memory is 16.1GB. [2022-11-25 22:17:24,248 INFO L158 Benchmark]: TraceAbstraction took 25121.61ms. Allocated memory was 134.2MB in the beginning and 339.7MB in the end (delta: 205.5MB). Free memory was 59.8MB in the beginning and 281.1MB in the end (delta: -221.4MB). Peak memory consumption was 158.5MB. Max. memory is 16.1GB. [2022-11-25 22:17:24,248 INFO L158 Benchmark]: Witness Printer took 63.81ms. Allocated memory is still 339.7MB. Free memory was 281.1MB in the beginning and 276.9MB in the end (delta: 4.2MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2022-11-25 22:17:24,255 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.29ms. Allocated memory is still 107.0MB. Free memory is still 58.5MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 268.11ms. Allocated memory is still 134.2MB. Free memory was 97.0MB in the beginning and 86.1MB in the end (delta: 10.9MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 39.57ms. Allocated memory is still 134.2MB. Free memory was 86.1MB in the beginning and 84.5MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 53.22ms. Allocated memory is still 134.2MB. Free memory was 84.5MB in the beginning and 82.8MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 713.18ms. Allocated memory is still 134.2MB. Free memory was 82.8MB in the beginning and 60.7MB in the end (delta: 22.2MB). Peak memory consumption was 21.0MB. Max. memory is 16.1GB. * TraceAbstraction took 25121.61ms. Allocated memory was 134.2MB in the beginning and 339.7MB in the end (delta: 205.5MB). Free memory was 59.8MB in the beginning and 281.1MB in the end (delta: -221.4MB). Peak memory consumption was 158.5MB. Max. memory is 16.1GB. * Witness Printer took 63.81ms. Allocated memory is still 339.7MB. Free memory was 281.1MB in the beginning and 276.9MB in the end (delta: 4.2MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - CounterExampleResult [Line: -1]: pointer dereference may fail pointer dereference may fail We found a FailurePath: [L23] struct cont cont; [L24] struct dummy dummy; [L25] struct dummy *dummies[10]; [L26] int a[10]; [L27] int i, *pa; [L28] i = __VERIFIER_nondet_int() [L29] int j = 0; VAL [a={5:0}, cont={6:0}, dummies={9:0}, dummy={7:0}, i=8, j=0] [L29] COND TRUE j < 10 [L30] a[j] = __VERIFIER_nondet_int() [L34] dummies[j] = 0 [L29] j++ VAL [a={5:0}, cont={6:0}, dummies={9:0}, dummy={7:0}, i=8, j=1] [L29] COND TRUE j < 10 [L30] a[j] = __VERIFIER_nondet_int() [L34] dummies[j] = 0 [L29] j++ VAL [a={5:0}, cont={6:0}, dummies={9:0}, dummy={7:0}, i=8, j=2] [L29] COND TRUE j < 10 [L30] a[j] = __VERIFIER_nondet_int() [L34] dummies[j] = 0 [L29] j++ VAL [a={5:0}, cont={6:0}, dummies={9:0}, dummy={7:0}, i=8, j=3] [L29] COND TRUE j < 10 [L30] a[j] = __VERIFIER_nondet_int() [L34] dummies[j] = 0 [L29] j++ VAL [a={5:0}, cont={6:0}, dummies={9:0}, dummy={7:0}, i=8, j=4] [L29] COND TRUE j < 10 [L30] a[j] = __VERIFIER_nondet_int() [L34] dummies[j] = 0 [L29] j++ VAL [a={5:0}, cont={6:0}, dummies={9:0}, dummy={7:0}, i=8, j=5] [L29] COND TRUE j < 10 [L30] a[j] = __VERIFIER_nondet_int() [L34] dummies[j] = 0 [L29] j++ VAL [a={5:0}, cont={6:0}, dummies={9:0}, dummy={7:0}, i=8, j=6] [L29] COND TRUE j < 10 [L30] a[j] = __VERIFIER_nondet_int() [L34] dummies[j] = 0 [L29] j++ VAL [a={5:0}, cont={6:0}, dummies={9:0}, dummy={7:0}, i=8, j=7] [L29] COND TRUE j < 10 [L30] a[j] = __VERIFIER_nondet_int() [L34] dummies[j] = 0 [L29] j++ VAL [a={5:0}, cont={6:0}, dummies={9:0}, dummy={7:0}, i=8, j=8] [L29] COND TRUE j < 10 [L30] a[j] = __VERIFIER_nondet_int() [L34] dummies[j] = 0 [L29] j++ VAL [a={5:0}, cont={6:0}, dummies={9:0}, dummy={7:0}, i=8, j=9] [L29] COND TRUE j < 10 [L30] a[j] = __VERIFIER_nondet_int() [L34] dummies[j] = 0 [L29] j++ VAL [a={5:0}, cont={6:0}, dummies={9:0}, dummy={7:0}, i=8, j=10] [L29] COND FALSE !(j < 10) VAL [a={5:0}, cont={6:0}, dummies={9:0}, dummy={7:0}, i=8, j=10] [L36] COND TRUE i >= 0 && i < 9 VAL [a={5:0}, cont={6:0}, dummies={9:0}, dummy={7:0}, i=8, j=10] [L37] a[i] = i VAL [a={5:0}, cont={6:0}, dummies={9:0}, dummy={7:0}, i=8, j=10] [L38] dummy.array = &a[i] VAL [a={5:0}, cont={6:0}, dummies={9:0}, dummy={7:0}, i=8, j=10] [L39] dummies[i + 1] = &dummy VAL [a={5:0}, cont={6:0}, dummies={9:0}, dummy={7:0}, i=8, j=10] [L40] cont.array = &dummies[0] VAL [a={5:0}, cont={6:0}, dummies={9:0}, dummy={7:0}, i=8, j=10] [L41] EXPR cont.array VAL [a={5:0}, cont={6:0}, cont.array={9:0}, dummies={9:0}, dummy={7:0}, i=8, j=10] [L41] EXPR cont.array[i] VAL [a={5:0}, cont={6:0}, cont.array={9:0}, cont.array[i]={0:0}, dummies={9:0}, dummy={7:0}, i=8, j=10] [L41] cont.array[i]->array - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 55]: Unable to prove that all allocated memory was freed Unable to prove that all allocated memory was freed Reason: Not analyzed. - UnprovableResult [Line: 21]: Unable to prove that all allocated memory was freed Unable to prove that all allocated memory was freed Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 67 locations, 38 error locations. Started 1 CEGAR loops. OverallTime: 25.0s, OverallIterations: 17, TraceHistogramMax: 10, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.0s, AutomataDifference: 2.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 1539 SdHoareTripleChecker+Valid, 1.9s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 1539 mSDsluCounter, 1056 SdHoareTripleChecker+Invalid, 1.6s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 54 IncrementalHoareTripleChecker+Unchecked, 594 mSDsCounter, 32 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 1614 IncrementalHoareTripleChecker+Invalid, 1700 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 32 mSolverCounterUnsat, 462 mSDtfsCounter, 1614 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 399 GetRequests, 226 SyntacticMatches, 4 SemanticMatches, 169 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 1499 ImplicationChecksByTransitivity, 4.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=78occurred in iteration=11, InterpolantAutomatonStates: 94, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 16 MinimizatonAttempts, 222 StatesRemovedByMinimization, 6 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.2s SsaConstructionTime, 0.8s SatisfiabilityAnalysisTime, 6.3s InterpolantComputationTime, 458 NumberOfCodeBlocks, 428 NumberOfCodeBlocksAsserted, 24 NumberOfCheckSat, 488 ConstructedInterpolants, 22 QuantifiedInterpolants, 5570 SizeOfPredicates, 14 NumberOfNonLiveVariables, 1456 ConjunctsInSsa, 93 ConjunctsInUnsatCore, 29 InterpolantComputations, 10 PerfectInterpolantSequences, 1063/1395 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! [2022-11-25 22:17:24,287 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d216b91-91a8-4fa2-9614-bc20cd590896/bin/utaipan-ByfvJB40ur/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE(valid-deref)