./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/termination-dietlibc/stpcpy.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 8393723b 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_e1ad590c-19e8-4ed1-abf2-791c3f1297ed/bin/utaipan-I9t0OCRTmS/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1ad590c-19e8-4ed1-abf2-791c3f1297ed/bin/utaipan-I9t0OCRTmS/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1ad590c-19e8-4ed1-abf2-791c3f1297ed/bin/utaipan-I9t0OCRTmS/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1ad590c-19e8-4ed1-abf2-791c3f1297ed/bin/utaipan-I9t0OCRTmS/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/termination-dietlibc/stpcpy.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1ad590c-19e8-4ed1-abf2-791c3f1297ed/bin/utaipan-I9t0OCRTmS/config/svcomp-DerefFreeMemtrack-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1ad590c-19e8-4ed1-abf2-791c3f1297ed/bin/utaipan-I9t0OCRTmS --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash 469311c0017f986a05caefa2da4fc5bc0c8b955df01c1466f03ef72ee537722c --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-8393723 [2022-11-19 07:44:05,288 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-19 07:44:05,290 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-19 07:44:05,309 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-19 07:44:05,310 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-19 07:44:05,311 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-19 07:44:05,312 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-19 07:44:05,314 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-19 07:44:05,316 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-19 07:44:05,317 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-19 07:44:05,318 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-19 07:44:05,319 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-19 07:44:05,319 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-19 07:44:05,320 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-19 07:44:05,321 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-19 07:44:05,323 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-19 07:44:05,324 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-19 07:44:05,325 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-19 07:44:05,327 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-19 07:44:05,329 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-19 07:44:05,330 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-19 07:44:05,335 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-19 07:44:05,336 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-19 07:44:05,343 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-19 07:44:05,347 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-19 07:44:05,347 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-19 07:44:05,347 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-19 07:44:05,348 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-19 07:44:05,349 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-19 07:44:05,350 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-19 07:44:05,350 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-19 07:44:05,351 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-19 07:44:05,351 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-19 07:44:05,352 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-19 07:44:05,353 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-19 07:44:05,353 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-19 07:44:05,354 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-19 07:44:05,354 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-19 07:44:05,355 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-19 07:44:05,356 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-19 07:44:05,356 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-19 07:44:05,361 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1ad590c-19e8-4ed1-abf2-791c3f1297ed/bin/utaipan-I9t0OCRTmS/config/svcomp-DerefFreeMemtrack-64bit-Taipan_Default.epf [2022-11-19 07:44:05,407 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-19 07:44:05,407 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-19 07:44:05,408 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-19 07:44:05,408 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-19 07:44:05,409 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-19 07:44:05,409 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-19 07:44:05,409 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-19 07:44:05,410 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-19 07:44:05,410 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-19 07:44:05,410 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-19 07:44:05,411 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-19 07:44:05,411 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-19 07:44:05,411 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-19 07:44:05,412 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-19 07:44:05,412 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-19 07:44:05,412 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-19 07:44:05,412 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-19 07:44:05,412 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-19 07:44:05,413 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-19 07:44:05,413 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-19 07:44:05,413 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-19 07:44:05,414 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-19 07:44:05,420 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-19 07:44:05,421 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-19 07:44:05,421 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-11-19 07:44:05,421 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-11-19 07:44:05,421 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-11-19 07:44:05,421 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-19 07:44:05,422 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-19 07:44:05,422 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-19 07:44:05,422 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-19 07:44:05,423 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-19 07:44:05,423 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-19 07:44:05,423 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-19 07:44:05,423 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-19 07:44:05,423 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-19 07:44:05,424 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-19 07:44:05,424 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-19 07:44:05,424 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-19 07:44:05,424 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_e1ad590c-19e8-4ed1-abf2-791c3f1297ed/bin/utaipan-I9t0OCRTmS/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1ad590c-19e8-4ed1-abf2-791c3f1297ed/bin/utaipan-I9t0OCRTmS Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 469311c0017f986a05caefa2da4fc5bc0c8b955df01c1466f03ef72ee537722c [2022-11-19 07:44:05,766 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-19 07:44:05,814 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-19 07:44:05,817 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-19 07:44:05,819 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-19 07:44:05,822 INFO L275 PluginConnector]: CDTParser initialized [2022-11-19 07:44:05,824 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1ad590c-19e8-4ed1-abf2-791c3f1297ed/bin/utaipan-I9t0OCRTmS/../../sv-benchmarks/c/termination-dietlibc/stpcpy.i [2022-11-19 07:44:05,912 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1ad590c-19e8-4ed1-abf2-791c3f1297ed/bin/utaipan-I9t0OCRTmS/data/1dea75cff/037efb2f34d94439b22ed7d3bd0a464f/FLAGc0d17fb24 [2022-11-19 07:44:06,684 INFO L306 CDTParser]: Found 1 translation units. [2022-11-19 07:44:06,685 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1ad590c-19e8-4ed1-abf2-791c3f1297ed/sv-benchmarks/c/termination-dietlibc/stpcpy.i [2022-11-19 07:44:06,712 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1ad590c-19e8-4ed1-abf2-791c3f1297ed/bin/utaipan-I9t0OCRTmS/data/1dea75cff/037efb2f34d94439b22ed7d3bd0a464f/FLAGc0d17fb24 [2022-11-19 07:44:06,932 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1ad590c-19e8-4ed1-abf2-791c3f1297ed/bin/utaipan-I9t0OCRTmS/data/1dea75cff/037efb2f34d94439b22ed7d3bd0a464f [2022-11-19 07:44:06,935 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-19 07:44:06,937 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-19 07:44:06,939 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-19 07:44:06,939 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-19 07:44:06,944 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-19 07:44:06,945 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:44:06" (1/1) ... [2022-11-19 07:44:06,946 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4697c0d7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:44:06, skipping insertion in model container [2022-11-19 07:44:06,947 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:44:06" (1/1) ... [2022-11-19 07:44:06,956 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-19 07:44:06,994 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-19 07:44:07,452 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-19 07:44:07,468 INFO L203 MainTranslator]: Completed pre-run [2022-11-19 07:44:07,528 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-19 07:44:07,563 INFO L208 MainTranslator]: Completed translation [2022-11-19 07:44:07,564 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:44:07 WrapperNode [2022-11-19 07:44:07,564 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-19 07:44:07,566 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-19 07:44:07,566 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-19 07:44:07,566 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-19 07:44:07,576 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:44:07" (1/1) ... [2022-11-19 07:44:07,612 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:44:07" (1/1) ... [2022-11-19 07:44:07,650 INFO L138 Inliner]: procedures = 113, calls = 13, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 56 [2022-11-19 07:44:07,651 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-19 07:44:07,652 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-19 07:44:07,652 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-19 07:44:07,653 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-19 07:44:07,665 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:44:07" (1/1) ... [2022-11-19 07:44:07,666 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:44:07" (1/1) ... [2022-11-19 07:44:07,690 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:44:07" (1/1) ... [2022-11-19 07:44:07,691 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:44:07" (1/1) ... [2022-11-19 07:44:07,697 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:44:07" (1/1) ... [2022-11-19 07:44:07,701 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:44:07" (1/1) ... [2022-11-19 07:44:07,713 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:44:07" (1/1) ... [2022-11-19 07:44:07,715 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:44:07" (1/1) ... [2022-11-19 07:44:07,717 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-19 07:44:07,718 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-19 07:44:07,718 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-19 07:44:07,718 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-19 07:44:07,728 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:44:07" (1/1) ... [2022-11-19 07:44:07,737 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-19 07:44:07,750 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1ad590c-19e8-4ed1-abf2-791c3f1297ed/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:44:07,769 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1ad590c-19e8-4ed1-abf2-791c3f1297ed/bin/utaipan-I9t0OCRTmS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-19 07:44:07,797 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1ad590c-19e8-4ed1-abf2-791c3f1297ed/bin/utaipan-I9t0OCRTmS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-19 07:44:07,841 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-19 07:44:07,841 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-19 07:44:07,841 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-19 07:44:07,843 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-19 07:44:07,844 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-19 07:44:07,844 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-19 07:44:07,967 INFO L235 CfgBuilder]: Building ICFG [2022-11-19 07:44:07,970 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-19 07:44:08,216 INFO L276 CfgBuilder]: Performing block encoding [2022-11-19 07:44:08,240 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-19 07:44:08,240 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-19 07:44:08,243 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:44:08 BoogieIcfgContainer [2022-11-19 07:44:08,244 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-19 07:44:08,246 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-19 07:44:08,246 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-19 07:44:08,270 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-19 07:44:08,270 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 07:44:06" (1/3) ... [2022-11-19 07:44:08,271 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@479d44b1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 07:44:08, skipping insertion in model container [2022-11-19 07:44:08,271 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:44:07" (2/3) ... [2022-11-19 07:44:08,272 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@479d44b1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 07:44:08, skipping insertion in model container [2022-11-19 07:44:08,272 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:44:08" (3/3) ... [2022-11-19 07:44:08,274 INFO L112 eAbstractionObserver]: Analyzing ICFG stpcpy.i [2022-11-19 07:44:08,308 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-19 07:44:08,318 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 7 error locations. [2022-11-19 07:44:08,414 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-19 07:44:08,426 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;@7903bcb1, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-19 07:44:08,426 INFO L358 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2022-11-19 07:44:08,434 INFO L276 IsEmpty]: Start isEmpty. Operand has 18 states, 10 states have (on average 2.1) internal successors, (21), 17 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) [2022-11-19 07:44:08,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-11-19 07:44:08,445 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:44:08,446 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-11-19 07:44:08,447 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2022-11-19 07:44:08,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:44:08,458 INFO L85 PathProgramCache]: Analyzing trace with hash 73231, now seen corresponding path program 1 times [2022-11-19 07:44:08,471 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:44:08,472 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1334472381] [2022-11-19 07:44:08,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:44:08,474 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:44:08,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:44:08,712 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:44:08,713 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:44:08,713 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1334472381] [2022-11-19 07:44:08,714 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1334472381] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:44:08,715 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:44:08,715 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-19 07:44:08,717 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [872171264] [2022-11-19 07:44:08,718 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:44:08,723 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:44:08,724 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:44:08,767 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:44:08,769 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:44:08,772 INFO L87 Difference]: Start difference. First operand has 18 states, 10 states have (on average 2.1) internal successors, (21), 17 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) 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) [2022-11-19 07:44:08,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:44:08,859 INFO L93 Difference]: Finished difference Result 19 states and 21 transitions. [2022-11-19 07:44:08,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:44:08,863 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 [2022-11-19 07:44:08,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:44:08,876 INFO L225 Difference]: With dead ends: 19 [2022-11-19 07:44:08,886 INFO L226 Difference]: Without dead ends: 17 [2022-11-19 07:44:08,889 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 [2022-11-19 07:44:08,893 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 1 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 07:44:08,894 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 21 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 07:44:08,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2022-11-19 07:44:08,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2022-11-19 07:44:08,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 10 states have (on average 1.8) internal successors, (18), 16 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) [2022-11-19 07:44:08,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2022-11-19 07:44:08,928 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 3 [2022-11-19 07:44:08,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:44:08,929 INFO L495 AbstractCegarLoop]: Abstraction has 17 states and 18 transitions. [2022-11-19 07:44:08,929 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) [2022-11-19 07:44:08,929 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 18 transitions. [2022-11-19 07:44:08,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-11-19 07:44:08,930 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:44:08,930 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-11-19 07:44:08,930 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-19 07:44:08,931 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2022-11-19 07:44:08,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:44:08,931 INFO L85 PathProgramCache]: Analyzing trace with hash 73262, now seen corresponding path program 1 times [2022-11-19 07:44:08,932 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:44:08,932 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1436862732] [2022-11-19 07:44:08,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:44:08,933 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:44:08,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:44:09,119 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:44:09,119 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:44:09,120 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1436862732] [2022-11-19 07:44:09,120 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1436862732] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:44:09,120 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:44:09,121 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-19 07:44:09,121 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1624887711] [2022-11-19 07:44:09,121 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:44:09,122 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:44:09,123 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:44:09,123 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:44:09,124 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:44:09,124 INFO L87 Difference]: Start difference. First operand 17 states and 18 transitions. Second operand has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:44:09,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:44:09,177 INFO L93 Difference]: Finished difference Result 16 states and 17 transitions. [2022-11-19 07:44:09,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:44:09,179 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3 [2022-11-19 07:44:09,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:44:09,179 INFO L225 Difference]: With dead ends: 16 [2022-11-19 07:44:09,180 INFO L226 Difference]: Without dead ends: 16 [2022-11-19 07:44:09,180 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:44:09,182 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 11 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 7 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-19 07:44:09,183 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 7 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-19 07:44:09,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2022-11-19 07:44:09,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2022-11-19 07:44:09,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 10 states have (on average 1.7) internal successors, (17), 15 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:44:09,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 17 transitions. [2022-11-19 07:44:09,187 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 17 transitions. Word has length 3 [2022-11-19 07:44:09,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:44:09,188 INFO L495 AbstractCegarLoop]: Abstraction has 16 states and 17 transitions. [2022-11-19 07:44:09,188 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:44:09,188 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 17 transitions. [2022-11-19 07:44:09,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-11-19 07:44:09,191 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:44:09,192 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-11-19 07:44:09,194 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-19 07:44:09,195 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2022-11-19 07:44:09,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:44:09,207 INFO L85 PathProgramCache]: Analyzing trace with hash 73263, now seen corresponding path program 1 times [2022-11-19 07:44:09,207 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:44:09,208 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1781305458] [2022-11-19 07:44:09,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:44:09,209 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:44:09,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:44:09,440 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:44:09,441 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:44:09,441 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1781305458] [2022-11-19 07:44:09,441 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1781305458] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:44:09,442 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:44:09,442 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-19 07:44:09,443 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1785162542] [2022-11-19 07:44:09,443 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:44:09,443 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-19 07:44:09,444 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:44:09,445 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-19 07:44:09,445 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-19 07:44:09,445 INFO L87 Difference]: Start difference. First operand 16 states and 17 transitions. Second operand has 4 states, 3 states have (on average 1.0) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:44:09,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:44:09,488 INFO L93 Difference]: Finished difference Result 17 states and 17 transitions. [2022-11-19 07:44:09,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-19 07:44:09,489 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.0) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3 [2022-11-19 07:44:09,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:44:09,490 INFO L225 Difference]: With dead ends: 17 [2022-11-19 07:44:09,490 INFO L226 Difference]: Without dead ends: 17 [2022-11-19 07:44:09,491 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 [2022-11-19 07:44:09,493 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 16 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-19 07:44:09,494 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 16 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-19 07:44:09,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2022-11-19 07:44:09,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 15. [2022-11-19 07:44:09,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 10 states have (on average 1.6) internal successors, (16), 14 states have internal predecessors, (16), 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) [2022-11-19 07:44:09,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2022-11-19 07:44:09,499 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 3 [2022-11-19 07:44:09,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:44:09,500 INFO L495 AbstractCegarLoop]: Abstraction has 15 states and 16 transitions. [2022-11-19 07:44:09,500 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.0) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:44:09,500 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 16 transitions. [2022-11-19 07:44:09,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-11-19 07:44:09,501 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:44:09,501 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-11-19 07:44:09,502 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-19 07:44:09,502 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2022-11-19 07:44:09,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:44:09,503 INFO L85 PathProgramCache]: Analyzing trace with hash 70437930, now seen corresponding path program 1 times [2022-11-19 07:44:09,503 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:44:09,504 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1995634964] [2022-11-19 07:44:09,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:44:09,505 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:44:09,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:44:09,633 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:44:09,633 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:44:09,633 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1995634964] [2022-11-19 07:44:09,634 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1995634964] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:44:09,634 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:44:09,634 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-19 07:44:09,635 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1960280295] [2022-11-19 07:44:09,635 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:44:09,635 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-19 07:44:09,636 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:44:09,637 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-19 07:44:09,637 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-19 07:44:09,637 INFO L87 Difference]: Start difference. First operand 15 states and 16 transitions. Second operand has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:44:09,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:44:09,675 INFO L93 Difference]: Finished difference Result 16 states and 16 transitions. [2022-11-19 07:44:09,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-19 07:44:09,676 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2022-11-19 07:44:09,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:44:09,677 INFO L225 Difference]: With dead ends: 16 [2022-11-19 07:44:09,677 INFO L226 Difference]: Without dead ends: 15 [2022-11-19 07:44:09,678 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-19 07:44:09,680 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 0 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-19 07:44:09,681 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 20 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-19 07:44:09,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2022-11-19 07:44:09,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2022-11-19 07:44:09,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 10 states have (on average 1.5) internal successors, (15), 14 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) [2022-11-19 07:44:09,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2022-11-19 07:44:09,685 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 5 [2022-11-19 07:44:09,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:44:09,686 INFO L495 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2022-11-19 07:44:09,686 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:44:09,686 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2022-11-19 07:44:09,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-19 07:44:09,687 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:44:09,687 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-19 07:44:09,687 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-19 07:44:09,688 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2022-11-19 07:44:09,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:44:09,689 INFO L85 PathProgramCache]: Analyzing trace with hash -2111390110, now seen corresponding path program 1 times [2022-11-19 07:44:09,689 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:44:09,689 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1254138453] [2022-11-19 07:44:09,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:44:09,690 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:44:09,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:44:09,862 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:44:09,862 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:44:09,863 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1254138453] [2022-11-19 07:44:09,863 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1254138453] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:44:09,863 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:44:09,863 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-19 07:44:09,864 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [248073221] [2022-11-19 07:44:09,864 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:44:09,864 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-19 07:44:09,865 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:44:09,865 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-19 07:44:09,866 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-19 07:44:09,866 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand has 5 states, 4 states have (on average 1.5) internal successors, (6), 5 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:44:09,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:44:09,938 INFO L93 Difference]: Finished difference Result 14 states and 14 transitions. [2022-11-19 07:44:09,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-19 07:44:09,939 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 1.5) internal successors, (6), 5 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2022-11-19 07:44:09,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:44:09,940 INFO L225 Difference]: With dead ends: 14 [2022-11-19 07:44:09,940 INFO L226 Difference]: Without dead ends: 14 [2022-11-19 07:44:09,940 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-11-19 07:44:09,942 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 20 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 5 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-19 07:44:09,943 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 5 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-19 07:44:09,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2022-11-19 07:44:09,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2022-11-19 07:44:09,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 10 states have (on average 1.4) internal successors, (14), 13 states have internal predecessors, (14), 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) [2022-11-19 07:44:09,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 14 transitions. [2022-11-19 07:44:09,947 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 14 transitions. Word has length 6 [2022-11-19 07:44:09,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:44:09,947 INFO L495 AbstractCegarLoop]: Abstraction has 14 states and 14 transitions. [2022-11-19 07:44:09,948 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 1.5) internal successors, (6), 5 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:44:09,948 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 14 transitions. [2022-11-19 07:44:09,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-19 07:44:09,949 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:44:09,949 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-19 07:44:09,949 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-19 07:44:09,950 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2022-11-19 07:44:09,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:44:09,951 INFO L85 PathProgramCache]: Analyzing trace with hash -2111390109, now seen corresponding path program 1 times [2022-11-19 07:44:09,951 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:44:09,951 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [955098565] [2022-11-19 07:44:09,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:44:09,952 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:44:09,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:44:10,227 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:44:10,227 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:44:10,228 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [955098565] [2022-11-19 07:44:10,228 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [955098565] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:44:10,228 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:44:10,229 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-19 07:44:10,229 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1705339961] [2022-11-19 07:44:10,229 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:44:10,230 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-19 07:44:10,230 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:44:10,231 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-19 07:44:10,231 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-19 07:44:10,232 INFO L87 Difference]: Start difference. First operand 14 states and 14 transitions. Second operand has 6 states, 5 states have (on average 1.2) internal successors, (6), 6 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:44:10,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:44:10,371 INFO L93 Difference]: Finished difference Result 20 states and 21 transitions. [2022-11-19 07:44:10,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-19 07:44:10,372 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 1.2) internal successors, (6), 6 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2022-11-19 07:44:10,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:44:10,373 INFO L225 Difference]: With dead ends: 20 [2022-11-19 07:44:10,373 INFO L226 Difference]: Without dead ends: 20 [2022-11-19 07:44:10,374 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2022-11-19 07:44:10,375 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 35 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 07:44:10,382 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 8 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 07:44:10,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2022-11-19 07:44:10,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 16. [2022-11-19 07:44:10,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 12 states have (on average 1.3333333333333333) internal successors, (16), 15 states have internal predecessors, (16), 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) [2022-11-19 07:44:10,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 16 transitions. [2022-11-19 07:44:10,393 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 16 transitions. Word has length 6 [2022-11-19 07:44:10,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:44:10,393 INFO L495 AbstractCegarLoop]: Abstraction has 16 states and 16 transitions. [2022-11-19 07:44:10,394 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 1.2) internal successors, (6), 6 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:44:10,394 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 16 transitions. [2022-11-19 07:44:10,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-19 07:44:10,395 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:44:10,395 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:44:10,396 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-19 07:44:10,397 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2022-11-19 07:44:10,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:44:10,398 INFO L85 PathProgramCache]: Analyzing trace with hash -1028583975, now seen corresponding path program 1 times [2022-11-19 07:44:10,398 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:44:10,399 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [519238987] [2022-11-19 07:44:10,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:44:10,399 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:44:10,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:44:10,558 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:44:10,559 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:44:10,559 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [519238987] [2022-11-19 07:44:10,559 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [519238987] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:44:10,560 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:44:10,560 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 07:44:10,560 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [445198919] [2022-11-19 07:44:10,561 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:44:10,561 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-19 07:44:10,561 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:44:10,563 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-19 07:44:10,563 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-19 07:44:10,564 INFO L87 Difference]: Start difference. First operand 16 states and 16 transitions. Second operand has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 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) [2022-11-19 07:44:10,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:44:10,606 INFO L93 Difference]: Finished difference Result 15 states and 15 transitions. [2022-11-19 07:44:10,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-19 07:44:10,607 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 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 7 [2022-11-19 07:44:10,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:44:10,608 INFO L225 Difference]: With dead ends: 15 [2022-11-19 07:44:10,608 INFO L226 Difference]: Without dead ends: 15 [2022-11-19 07:44:10,608 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-19 07:44:10,615 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 9 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-19 07:44:10,616 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 6 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-19 07:44:10,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2022-11-19 07:44:10,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2022-11-19 07:44:10,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 12 states have (on average 1.25) internal successors, (15), 14 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) [2022-11-19 07:44:10,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2022-11-19 07:44:10,621 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 7 [2022-11-19 07:44:10,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:44:10,624 INFO L495 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2022-11-19 07:44:10,624 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 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) [2022-11-19 07:44:10,624 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2022-11-19 07:44:10,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-19 07:44:10,625 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:44:10,626 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:44:10,626 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-19 07:44:10,626 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2022-11-19 07:44:10,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:44:10,628 INFO L85 PathProgramCache]: Analyzing trace with hash -1028583974, now seen corresponding path program 1 times [2022-11-19 07:44:10,629 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:44:10,629 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [477518227] [2022-11-19 07:44:10,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:44:10,630 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:44:10,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:44:10,947 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:44:10,947 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:44:10,948 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [477518227] [2022-11-19 07:44:10,948 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [477518227] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:44:10,948 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:44:10,948 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-19 07:44:10,949 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [874384949] [2022-11-19 07:44:10,949 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:44:10,949 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-19 07:44:10,950 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:44:10,950 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-19 07:44:10,950 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-19 07:44:10,951 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand has 6 states, 5 states have (on average 1.4) internal successors, (7), 6 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) [2022-11-19 07:44:11,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:44:11,031 INFO L93 Difference]: Finished difference Result 17 states and 18 transitions. [2022-11-19 07:44:11,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-19 07:44:11,032 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 1.4) internal successors, (7), 6 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 7 [2022-11-19 07:44:11,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:44:11,033 INFO L225 Difference]: With dead ends: 17 [2022-11-19 07:44:11,033 INFO L226 Difference]: Without dead ends: 17 [2022-11-19 07:44:11,036 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2022-11-19 07:44:11,040 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 32 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-19 07:44:11,041 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 10 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-19 07:44:11,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2022-11-19 07:44:11,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 16. [2022-11-19 07:44:11,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 13 states have (on average 1.2307692307692308) internal successors, (16), 15 states have internal predecessors, (16), 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) [2022-11-19 07:44:11,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 16 transitions. [2022-11-19 07:44:11,055 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 16 transitions. Word has length 7 [2022-11-19 07:44:11,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:44:11,056 INFO L495 AbstractCegarLoop]: Abstraction has 16 states and 16 transitions. [2022-11-19 07:44:11,060 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 1.4) internal successors, (7), 6 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) [2022-11-19 07:44:11,061 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 16 transitions. [2022-11-19 07:44:11,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-19 07:44:11,062 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:44:11,062 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:44:11,062 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-19 07:44:11,065 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2022-11-19 07:44:11,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:44:11,066 INFO L85 PathProgramCache]: Analyzing trace with hash 2046459371, now seen corresponding path program 1 times [2022-11-19 07:44:11,067 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:44:11,067 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1853017926] [2022-11-19 07:44:11,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:44:11,067 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:44:11,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:44:11,707 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:44:11,707 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:44:11,708 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1853017926] [2022-11-19 07:44:11,708 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1853017926] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:44:11,708 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1221874465] [2022-11-19 07:44:11,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:44:11,709 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:44:11,709 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1ad590c-19e8-4ed1-abf2-791c3f1297ed/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:44:11,715 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1ad590c-19e8-4ed1-abf2-791c3f1297ed/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:44:11,746 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1ad590c-19e8-4ed1-abf2-791c3f1297ed/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-19 07:44:11,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:44:11,843 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 43 conjunts are in the unsatisfiable core [2022-11-19 07:44:11,854 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:44:11,979 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 14 treesize of output 10 [2022-11-19 07:44:12,138 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-19 07:44:12,139 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2022-11-19 07:44:12,256 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-19 07:44:12,257 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-11-19 07:44:12,510 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-19 07:44:12,511 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 17 [2022-11-19 07:44:12,637 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:44:12,637 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:44:13,095 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:44:13,099 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 16 treesize of output 12 [2022-11-19 07:44:13,112 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 11 [2022-11-19 07:44:13,121 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 22 treesize of output 20 [2022-11-19 07:44:13,138 INFO L321 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-11-19 07:44:13,138 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 12 [2022-11-19 07:44:13,153 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:44:13,154 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1221874465] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:44:13,154 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2133898264] [2022-11-19 07:44:13,176 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-11-19 07:44:13,177 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 07:44:13,182 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 07:44:13,189 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 07:44:13,190 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 07:44:13,246 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-19 07:44:13,276 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 14 treesize of output 10 [2022-11-19 07:44:13,364 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:44:13,367 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-11-19 07:44:13,520 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:44:13,537 INFO L321 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-11-19 07:44:13,538 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 31 [2022-11-19 07:44:13,692 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:44:13,697 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:44:13,701 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:44:13,704 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:44:13,715 INFO L321 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-11-19 07:44:13,715 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 1 case distinctions, treesize of input 48 treesize of output 52 [2022-11-19 07:44:14,883 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:44:14,904 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:44:14,907 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:44:14,909 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:44:14,910 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:44:14,917 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:44:15,050 INFO L321 Elim1Store]: treesize reduction 261, result has 13.9 percent of original size [2022-11-19 07:44:15,051 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 4 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 23 case distinctions, treesize of input 421 treesize of output 419 [2022-11-19 07:44:15,297 INFO L321 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2022-11-19 07:44:15,298 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 19 treesize of output 18 [2022-11-19 07:44:15,610 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 07:44:19,777 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '404#(and (= |ULTIMATE.start_main_#t~malloc8#1.offset| 0) (= |ULTIMATE.start_stpcpy_#t~post3#1.base| |ULTIMATE.start_stpcpy_~src#1.base|) (<= 0 |ULTIMATE.start_stpcpy_#in~src#1.base|) (<= 0 |ULTIMATE.start_stpcpy_#in~src#1.offset|) (<= 0 |ULTIMATE.start_stpcpy_#t~post3#1.base|) (<= 0 |ULTIMATE.start_main_~in~0#1.offset|) (not (<= (+ |ULTIMATE.start_stpcpy_#t~post3#1.offset| 1) (select |#length| |ULTIMATE.start_stpcpy_#t~post3#1.base|))) (<= 0 |ULTIMATE.start_stpcpy_#in~dst#1.base|) (= (+ |ULTIMATE.start_stpcpy_#t~post3#1.offset| 1) |ULTIMATE.start_stpcpy_~src#1.offset|) (<= |ULTIMATE.start_main_~out~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_#t~malloc8#1.base|) (<= |ULTIMATE.start_stpcpy_#in~src#1.offset| 0) (<= |ULTIMATE.start_main_~in_len~0#1| 2147483647) (<= |ULTIMATE.start_main_~out_len~0#1| 2147483647) (= |ULTIMATE.start_stpcpy_#t~post2#1.base| |ULTIMATE.start_stpcpy_~dst#1.base|) (<= 0 |ULTIMATE.start_stpcpy_#t~post2#1.base|) (<= |ULTIMATE.start_stpcpy_#in~dst#1.offset| 0) (= |ULTIMATE.start_main_#t~malloc6#1.offset| 0) (<= 0 |ULTIMATE.start_main_~in~0#1.base|) (<= 1 |ULTIMATE.start_stpcpy_#t~post2#1.offset|) (<= |ULTIMATE.start_main_~in~0#1.offset| 0) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_#t~malloc6#1.base|) (<= 0 |ULTIMATE.start_main_~out~0#1.base|) (<= 0 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_stpcpy_#in~dst#1.offset|) (<= 1 |ULTIMATE.start_main_~in_len~0#1|) (= |ULTIMATE.start_stpcpy_~dst#1.offset| (+ |ULTIMATE.start_stpcpy_#t~post2#1.offset| 1)) (<= 0 |ULTIMATE.start_main_~out~0#1.offset|) (<= 1 |ULTIMATE.start_stpcpy_#t~post3#1.offset|) (= |#NULL.base| 0) (<= 1 |ULTIMATE.start_main_~out_len~0#1|))' at error location [2022-11-19 07:44:19,778 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 07:44:19,778 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 07:44:19,779 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 19 [2022-11-19 07:44:19,779 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [729645740] [2022-11-19 07:44:19,779 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 07:44:19,780 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-11-19 07:44:19,780 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:44:19,781 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-11-19 07:44:19,781 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=660, Unknown=0, NotChecked=0, Total=756 [2022-11-19 07:44:19,782 INFO L87 Difference]: Start difference. First operand 16 states and 16 transitions. Second operand has 20 states, 19 states have (on average 1.3157894736842106) internal successors, (25), 20 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:44:20,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:44:20,141 INFO L93 Difference]: Finished difference Result 22 states and 24 transitions. [2022-11-19 07:44:20,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-19 07:44:20,142 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 1.3157894736842106) internal successors, (25), 20 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-11-19 07:44:20,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:44:20,143 INFO L225 Difference]: With dead ends: 22 [2022-11-19 07:44:20,143 INFO L226 Difference]: Without dead ends: 22 [2022-11-19 07:44:20,145 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 205 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=118, Invalid=812, Unknown=0, NotChecked=0, Total=930 [2022-11-19 07:44:20,147 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 7 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 105 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 160 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 105 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 51 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 07:44:20,147 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 29 Invalid, 160 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 105 Invalid, 0 Unknown, 51 Unchecked, 0.1s Time] [2022-11-19 07:44:20,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2022-11-19 07:44:20,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 19. [2022-11-19 07:44:20,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 16 states have (on average 1.25) internal successors, (20), 18 states have internal predecessors, (20), 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) [2022-11-19 07:44:20,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 20 transitions. [2022-11-19 07:44:20,154 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 20 transitions. Word has length 10 [2022-11-19 07:44:20,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:44:20,154 INFO L495 AbstractCegarLoop]: Abstraction has 19 states and 20 transitions. [2022-11-19 07:44:20,157 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 1.3157894736842106) internal successors, (25), 20 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:44:20,158 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 20 transitions. [2022-11-19 07:44:20,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-19 07:44:20,158 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:44:20,159 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:44:20,168 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1ad590c-19e8-4ed1-abf2-791c3f1297ed/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-19 07:44:20,363 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1ad590c-19e8-4ed1-abf2-791c3f1297ed/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:44:20,363 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2022-11-19 07:44:20,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:44:20,364 INFO L85 PathProgramCache]: Analyzing trace with hash 2046458178, now seen corresponding path program 1 times [2022-11-19 07:44:20,364 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:44:20,364 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [422655321] [2022-11-19 07:44:20,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:44:20,365 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:44:20,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:44:20,612 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:44:20,615 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:44:20,615 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [422655321] [2022-11-19 07:44:20,616 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [422655321] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:44:20,616 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:44:20,616 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 07:44:20,616 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [730945821] [2022-11-19 07:44:20,617 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:44:20,618 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-19 07:44:20,618 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:44:20,619 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-19 07:44:20,621 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-19 07:44:20,621 INFO L87 Difference]: Start difference. First operand 19 states and 20 transitions. Second operand has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 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) [2022-11-19 07:44:20,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:44:20,649 INFO L93 Difference]: Finished difference Result 18 states and 19 transitions. [2022-11-19 07:44:20,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-19 07:44:20,650 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-11-19 07:44:20,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:44:20,651 INFO L225 Difference]: With dead ends: 18 [2022-11-19 07:44:20,651 INFO L226 Difference]: Without dead ends: 16 [2022-11-19 07:44:20,651 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-19 07:44:20,652 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 3 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-19 07:44:20,653 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 15 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-19 07:44:20,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2022-11-19 07:44:20,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2022-11-19 07:44:20,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 14 states have (on average 1.1428571428571428) internal successors, (16), 15 states have internal predecessors, (16), 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) [2022-11-19 07:44:20,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 16 transitions. [2022-11-19 07:44:20,656 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 16 transitions. Word has length 10 [2022-11-19 07:44:20,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:44:20,656 INFO L495 AbstractCegarLoop]: Abstraction has 16 states and 16 transitions. [2022-11-19 07:44:20,657 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 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) [2022-11-19 07:44:20,657 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 16 transitions. [2022-11-19 07:44:20,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-19 07:44:20,657 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:44:20,658 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:44:20,658 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-11-19 07:44:20,658 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2022-11-19 07:44:20,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:44:20,659 INFO L85 PathProgramCache]: Analyzing trace with hash -984268974, now seen corresponding path program 1 times [2022-11-19 07:44:20,659 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:44:20,660 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [565834469] [2022-11-19 07:44:20,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:44:20,660 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:44:20,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:44:21,314 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:44:21,314 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:44:21,314 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [565834469] [2022-11-19 07:44:21,314 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [565834469] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:44:21,314 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [420501012] [2022-11-19 07:44:21,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:44:21,315 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:44:21,315 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1ad590c-19e8-4ed1-abf2-791c3f1297ed/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:44:21,316 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1ad590c-19e8-4ed1-abf2-791c3f1297ed/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:44:21,319 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1ad590c-19e8-4ed1-abf2-791c3f1297ed/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-19 07:44:21,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:44:21,410 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 55 conjunts are in the unsatisfiable core [2022-11-19 07:44:21,420 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:44:21,451 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 14 treesize of output 10 [2022-11-19 07:44:21,501 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-19 07:44:21,756 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-19 07:44:21,757 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 15 [2022-11-19 07:44:22,149 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:44:22,149 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:44:22,672 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 11 [2022-11-19 07:44:22,679 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 14 treesize of output 12 [2022-11-19 07:44:22,721 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:44:22,721 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [420501012] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:44:22,721 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [316002825] [2022-11-19 07:44:22,730 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-11-19 07:44:22,730 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 07:44:22,730 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 07:44:22,731 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 07:44:22,731 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 07:44:22,758 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-19 07:44:22,778 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-19 07:44:22,821 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:44:22,824 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-11-19 07:44:22,942 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:44:22,950 INFO L321 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-11-19 07:44:22,951 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 31 [2022-11-19 07:44:23,072 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:44:23,074 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:44:23,077 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:44:23,079 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:44:23,090 INFO L321 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-11-19 07:44:23,090 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 1 case distinctions, treesize of input 54 treesize of output 56 [2022-11-19 07:44:23,978 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:44:23,982 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:44:23,993 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:44:24,011 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:44:24,013 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:44:24,027 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:44:24,032 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:44:24,230 INFO L321 Elim1Store]: treesize reduction 402, result has 13.4 percent of original size [2022-11-19 07:44:24,231 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 5 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 29 case distinctions, treesize of input 406 treesize of output 420 [2022-11-19 07:44:24,567 INFO L321 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2022-11-19 07:44:24,567 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 19 treesize of output 18 [2022-11-19 07:44:24,818 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 07:44:28,597 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '583#(and (= |ULTIMATE.start_main_#t~malloc8#1.offset| 0) (= |ULTIMATE.start_stpcpy_#t~post3#1.base| |ULTIMATE.start_stpcpy_~src#1.base|) (<= 0 |ULTIMATE.start_stpcpy_#in~src#1.base|) (<= 0 |ULTIMATE.start_stpcpy_#in~src#1.offset|) (<= 0 |ULTIMATE.start_stpcpy_#t~post3#1.base|) (= |ULTIMATE.start_stpcpy_#t~mem4#1| (select (select |#memory_int| |ULTIMATE.start_stpcpy_#t~post3#1.base|) |ULTIMATE.start_stpcpy_#t~post3#1.offset|)) (<= 0 |ULTIMATE.start_main_~in~0#1.offset|) (not (<= (+ |ULTIMATE.start_stpcpy_#t~post2#1.offset| 1) (select |#length| |ULTIMATE.start_stpcpy_#t~post2#1.base|))) (<= 0 |ULTIMATE.start_stpcpy_#in~dst#1.base|) (= (+ |ULTIMATE.start_stpcpy_#t~post3#1.offset| 1) |ULTIMATE.start_stpcpy_~src#1.offset|) (<= |ULTIMATE.start_main_~out~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_#t~malloc8#1.base|) (<= |ULTIMATE.start_stpcpy_#in~src#1.offset| 0) (= (select |#valid| |ULTIMATE.start_stpcpy_#t~post3#1.base|) 1) (<= |ULTIMATE.start_main_~in_len~0#1| 2147483647) (<= |ULTIMATE.start_main_~out_len~0#1| 2147483647) (= |ULTIMATE.start_stpcpy_#t~post2#1.base| |ULTIMATE.start_stpcpy_~dst#1.base|) (<= 0 |ULTIMATE.start_stpcpy_#t~post2#1.base|) (<= |ULTIMATE.start_stpcpy_#in~dst#1.offset| 0) (= |ULTIMATE.start_main_#t~malloc6#1.offset| 0) (<= 0 |ULTIMATE.start_main_~in~0#1.base|) (<= 1 |ULTIMATE.start_stpcpy_#t~post2#1.offset|) (<= |ULTIMATE.start_main_~in~0#1.offset| 0) (= |#NULL.offset| 0) (<= (+ |ULTIMATE.start_stpcpy_#t~post3#1.offset| 1) (select |#length| |ULTIMATE.start_stpcpy_#t~post3#1.base|)) (<= 0 |ULTIMATE.start_main_#t~malloc6#1.base|) (<= 0 |ULTIMATE.start_main_~out~0#1.base|) (<= 0 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_stpcpy_#in~dst#1.offset|) (<= 1 |ULTIMATE.start_main_~in_len~0#1|) (= |ULTIMATE.start_stpcpy_~dst#1.offset| (+ |ULTIMATE.start_stpcpy_#t~post2#1.offset| 1)) (<= 0 |ULTIMATE.start_main_~out~0#1.offset|) (<= 1 |ULTIMATE.start_stpcpy_#t~post3#1.offset|) (= |#NULL.base| 0) (<= 1 |ULTIMATE.start_main_~out_len~0#1|))' at error location [2022-11-19 07:44:28,597 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 07:44:28,597 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 07:44:28,597 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 24 [2022-11-19 07:44:28,598 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [40639018] [2022-11-19 07:44:28,598 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 07:44:28,598 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-11-19 07:44:28,598 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:44:28,599 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-11-19 07:44:28,599 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=939, Unknown=0, NotChecked=0, Total=1056 [2022-11-19 07:44:28,600 INFO L87 Difference]: Start difference. First operand 16 states and 16 transitions. Second operand has 25 states, 24 states have (on average 1.25) internal successors, (30), 25 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:44:30,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:44:30,574 INFO L93 Difference]: Finished difference Result 17 states and 17 transitions. [2022-11-19 07:44:30,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-19 07:44:30,575 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 24 states have (on average 1.25) internal successors, (30), 25 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-11-19 07:44:30,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:44:30,575 INFO L225 Difference]: With dead ends: 17 [2022-11-19 07:44:30,575 INFO L226 Difference]: Without dead ends: 17 [2022-11-19 07:44:30,576 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 8 SyntacticMatches, 2 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 305 ImplicationChecksByTransitivity, 6.5s TimeCoverageRelationStatistics Valid=194, Invalid=1528, Unknown=0, NotChecked=0, Total=1722 [2022-11-19 07:44:30,577 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 19 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 135 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 151 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 135 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 4 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-19 07:44:30,577 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 8 Invalid, 151 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 135 Invalid, 0 Unknown, 4 Unchecked, 0.2s Time] [2022-11-19 07:44:30,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2022-11-19 07:44:30,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 15. [2022-11-19 07:44:30,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 14 states have (on average 1.0714285714285714) internal successors, (15), 14 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) [2022-11-19 07:44:30,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2022-11-19 07:44:30,581 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 11 [2022-11-19 07:44:30,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:44:30,581 INFO L495 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2022-11-19 07:44:30,582 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 24 states have (on average 1.25) internal successors, (30), 25 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:44:30,582 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2022-11-19 07:44:30,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-19 07:44:30,582 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:44:30,583 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1] [2022-11-19 07:44:30,590 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1ad590c-19e8-4ed1-abf2-791c3f1297ed/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-19 07:44:30,790 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1ad590c-19e8-4ed1-abf2-791c3f1297ed/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-11-19 07:44:30,790 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2022-11-19 07:44:30,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:44:30,791 INFO L85 PathProgramCache]: Analyzing trace with hash -615302797, now seen corresponding path program 2 times [2022-11-19 07:44:30,791 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:44:30,791 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [941666209] [2022-11-19 07:44:30,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:44:30,792 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:44:30,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:44:31,760 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:44:31,761 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:44:31,761 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [941666209] [2022-11-19 07:44:31,761 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [941666209] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:44:31,761 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [997254371] [2022-11-19 07:44:31,762 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-19 07:44:31,762 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:44:31,762 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1ad590c-19e8-4ed1-abf2-791c3f1297ed/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:44:31,764 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1ad590c-19e8-4ed1-abf2-791c3f1297ed/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:44:31,777 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1ad590c-19e8-4ed1-abf2-791c3f1297ed/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-19 07:44:31,895 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-19 07:44:31,896 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 07:44:31,900 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 76 conjunts are in the unsatisfiable core [2022-11-19 07:44:31,903 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:44:31,915 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-19 07:44:31,951 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 14 treesize of output 10 [2022-11-19 07:44:32,038 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-19 07:44:32,039 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-11-19 07:44:32,053 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-19 07:44:32,349 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 23 treesize of output 23 [2022-11-19 07:44:32,609 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:44:32,626 INFO L321 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2022-11-19 07:44:32,626 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 23 [2022-11-19 07:44:32,884 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:44:32,884 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:44:34,918 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-19 07:44:34,919 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 2 new quantified variables, introduced 2 case distinctions, treesize of input 90 treesize of output 78 [2022-11-19 07:44:34,950 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-19 07:44:34,951 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 61 treesize of output 79 [2022-11-19 07:44:34,965 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 89 treesize of output 83 [2022-11-19 07:44:34,986 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 104 treesize of output 94 [2022-11-19 07:44:35,000 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 72 treesize of output 68 [2022-11-19 07:44:35,007 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 68 treesize of output 64 [2022-11-19 07:44:35,258 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:44:35,259 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [997254371] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:44:35,259 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [672872497] [2022-11-19 07:44:35,264 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-11-19 07:44:35,265 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 07:44:35,265 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 07:44:35,266 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 07:44:35,266 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 07:44:35,294 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-19 07:44:35,313 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 14 treesize of output 10 [2022-11-19 07:44:35,353 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:44:35,356 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-11-19 07:44:35,432 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:44:35,440 INFO L321 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-11-19 07:44:35,441 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 31 [2022-11-19 07:44:35,579 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:44:35,582 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:44:35,586 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:44:35,587 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:44:35,597 INFO L321 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-11-19 07:44:35,598 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 1 case distinctions, treesize of input 52 treesize of output 54 [2022-11-19 07:44:36,339 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:44:36,355 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:44:36,359 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:44:36,361 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:44:36,362 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:44:36,367 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:44:36,484 INFO L321 Elim1Store]: treesize reduction 261, result has 13.9 percent of original size [2022-11-19 07:44:36,485 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 4 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 23 case distinctions, treesize of input 421 treesize of output 419 [2022-11-19 07:44:36,782 INFO L321 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2022-11-19 07:44:36,784 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 19 treesize of output 18 [2022-11-19 07:44:37,005 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 07:44:41,152 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '754#(and (= |ULTIMATE.start_main_#t~malloc8#1.offset| 0) (= |ULTIMATE.start_stpcpy_#t~post3#1.base| |ULTIMATE.start_stpcpy_~src#1.base|) (<= 0 |ULTIMATE.start_stpcpy_#in~src#1.base|) (<= 0 |ULTIMATE.start_stpcpy_#in~src#1.offset|) (<= 0 |ULTIMATE.start_stpcpy_#t~post3#1.base|) (<= 0 |ULTIMATE.start_main_~in~0#1.offset|) (not (<= (+ |ULTIMATE.start_stpcpy_#t~post3#1.offset| 1) (select |#length| |ULTIMATE.start_stpcpy_#t~post3#1.base|))) (<= 0 |ULTIMATE.start_stpcpy_#in~dst#1.base|) (= (+ |ULTIMATE.start_stpcpy_#t~post3#1.offset| 1) |ULTIMATE.start_stpcpy_~src#1.offset|) (<= |ULTIMATE.start_main_~out~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_#t~malloc8#1.base|) (<= |ULTIMATE.start_stpcpy_#in~src#1.offset| 0) (<= |ULTIMATE.start_main_~in_len~0#1| 2147483647) (<= |ULTIMATE.start_main_~out_len~0#1| 2147483647) (= |ULTIMATE.start_stpcpy_#t~post2#1.base| |ULTIMATE.start_stpcpy_~dst#1.base|) (<= 0 |ULTIMATE.start_stpcpy_#t~post2#1.base|) (<= |ULTIMATE.start_stpcpy_#in~dst#1.offset| 0) (= |ULTIMATE.start_main_#t~malloc6#1.offset| 0) (<= 0 |ULTIMATE.start_main_~in~0#1.base|) (<= 1 |ULTIMATE.start_stpcpy_#t~post2#1.offset|) (<= |ULTIMATE.start_main_~in~0#1.offset| 0) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_#t~malloc6#1.base|) (<= 0 |ULTIMATE.start_main_~out~0#1.base|) (<= 0 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_stpcpy_#in~dst#1.offset|) (<= 1 |ULTIMATE.start_main_~in_len~0#1|) (= |ULTIMATE.start_stpcpy_~dst#1.offset| (+ |ULTIMATE.start_stpcpy_#t~post2#1.offset| 1)) (<= 0 |ULTIMATE.start_main_~out~0#1.offset|) (<= 1 |ULTIMATE.start_stpcpy_#t~post3#1.offset|) (= |#NULL.base| 0) (<= 1 |ULTIMATE.start_main_~out_len~0#1|))' at error location [2022-11-19 07:44:41,152 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 07:44:41,153 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 07:44:41,153 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12, 12] total 33 [2022-11-19 07:44:41,153 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [951936332] [2022-11-19 07:44:41,153 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 07:44:41,154 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-11-19 07:44:41,154 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:44:41,154 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-11-19 07:44:41,155 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=160, Invalid=1557, Unknown=5, NotChecked=0, Total=1722 [2022-11-19 07:44:41,156 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 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) [2022-11-19 07:44:42,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:44:42,657 INFO L93 Difference]: Finished difference Result 21 states and 21 transitions. [2022-11-19 07:44:42,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-19 07:44:42,658 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 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 14 [2022-11-19 07:44:42,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:44:42,658 INFO L225 Difference]: With dead ends: 21 [2022-11-19 07:44:42,658 INFO L226 Difference]: Without dead ends: 21 [2022-11-19 07:44:42,660 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 514 ImplicationChecksByTransitivity, 8.2s TimeCoverageRelationStatistics Valid=212, Invalid=2039, Unknown=5, NotChecked=0, Total=2256 [2022-11-19 07:44:42,660 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 9 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 101 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 13 SdHoareTripleChecker+Invalid, 167 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 101 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 62 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 07:44:42,661 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 13 Invalid, 167 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 101 Invalid, 0 Unknown, 62 Unchecked, 0.1s Time] [2022-11-19 07:44:42,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2022-11-19 07:44:42,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 19. [2022-11-19 07:44:42,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 18 states have (on average 1.0555555555555556) internal successors, (19), 18 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:44:42,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 19 transitions. [2022-11-19 07:44:42,664 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 19 transitions. Word has length 14 [2022-11-19 07:44:42,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:44:42,665 INFO L495 AbstractCegarLoop]: Abstraction has 19 states and 19 transitions. [2022-11-19 07:44:42,665 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 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) [2022-11-19 07:44:42,666 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 19 transitions. [2022-11-19 07:44:42,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-11-19 07:44:42,666 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:44:42,667 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 1, 1, 1, 1, 1] [2022-11-19 07:44:42,683 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1ad590c-19e8-4ed1-abf2-791c3f1297ed/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-19 07:44:42,867 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1ad590c-19e8-4ed1-abf2-791c3f1297ed/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-11-19 07:44:42,868 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2022-11-19 07:44:42,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:44:42,868 INFO L85 PathProgramCache]: Analyzing trace with hash 592638203, now seen corresponding path program 3 times [2022-11-19 07:44:42,869 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:44:42,869 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2096535012] [2022-11-19 07:44:42,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:44:42,869 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:44:42,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:44:43,954 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:44:43,955 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:44:43,955 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2096535012] [2022-11-19 07:44:43,955 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2096535012] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:44:43,955 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1671913786] [2022-11-19 07:44:43,955 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-19 07:44:43,956 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:44:43,956 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1ad590c-19e8-4ed1-abf2-791c3f1297ed/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:44:43,959 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1ad590c-19e8-4ed1-abf2-791c3f1297ed/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:44:43,990 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1ad590c-19e8-4ed1-abf2-791c3f1297ed/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-19 07:44:44,082 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-19 07:44:44,082 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 07:44:44,085 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 75 conjunts are in the unsatisfiable core [2022-11-19 07:44:44,089 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:44:44,147 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 14 treesize of output 10 [2022-11-19 07:44:44,227 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-19 07:44:44,228 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-11-19 07:44:44,237 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-19 07:44:44,552 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 26 treesize of output 26 [2022-11-19 07:44:45,033 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 36 treesize of output 34 [2022-11-19 07:44:45,473 INFO L321 Elim1Store]: treesize reduction 8, result has 75.8 percent of original size [2022-11-19 07:44:45,473 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 40 treesize of output 39 [2022-11-19 07:44:45,597 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:44:45,598 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:44:47,081 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-19 07:44:47,082 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 60 treesize of output 48 [2022-11-19 07:44:47,090 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:44:47,094 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 16 treesize of output 12 [2022-11-19 07:44:47,102 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:44:47,105 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 25 [2022-11-19 07:44:47,120 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 58 [2022-11-19 07:44:47,136 INFO L321 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-11-19 07:44:47,137 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 12 [2022-11-19 07:44:47,159 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:44:47,160 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1671913786] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:44:47,160 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [870468842] [2022-11-19 07:44:47,162 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-11-19 07:44:47,162 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 07:44:47,163 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 07:44:47,163 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 07:44:47,164 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 07:44:47,177 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-19 07:44:47,194 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 14 treesize of output 10 [2022-11-19 07:44:47,234 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:44:47,235 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-11-19 07:44:47,317 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:44:47,326 INFO L321 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-11-19 07:44:47,326 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 31 [2022-11-19 07:44:47,428 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:44:47,432 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:44:47,434 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:44:47,435 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:44:47,444 INFO L321 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-11-19 07:44:47,444 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 1 case distinctions, treesize of input 48 treesize of output 52 [2022-11-19 07:44:48,084 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:44:48,088 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:44:48,095 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:44:48,098 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:44:48,100 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:44:48,210 INFO L321 Elim1Store]: treesize reduction 237, result has 15.1 percent of original size [2022-11-19 07:44:48,210 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 17 case distinctions, treesize of input 419 treesize of output 410 [2022-11-19 07:44:48,388 INFO L321 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2022-11-19 07:44:48,388 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 19 treesize of output 18 [2022-11-19 07:44:48,602 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 07:44:53,002 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '958#(and (= |ULTIMATE.start_main_#t~malloc8#1.offset| 0) (= |ULTIMATE.start_stpcpy_#t~post3#1.base| |ULTIMATE.start_stpcpy_~src#1.base|) (<= 0 |ULTIMATE.start_stpcpy_#in~src#1.base|) (<= 0 |ULTIMATE.start_stpcpy_#in~src#1.offset|) (<= 0 |ULTIMATE.start_stpcpy_#t~post3#1.base|) (<= 0 |ULTIMATE.start_main_~in~0#1.offset|) (not (<= (+ |ULTIMATE.start_stpcpy_#t~post3#1.offset| 1) (select |#length| |ULTIMATE.start_stpcpy_#t~post3#1.base|))) (<= 0 |ULTIMATE.start_stpcpy_#in~dst#1.base|) (= (+ |ULTIMATE.start_stpcpy_#t~post3#1.offset| 1) |ULTIMATE.start_stpcpy_~src#1.offset|) (<= |ULTIMATE.start_main_~out~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_#t~malloc8#1.base|) (<= |ULTIMATE.start_stpcpy_#in~src#1.offset| 0) (<= |ULTIMATE.start_main_~in_len~0#1| 2147483647) (<= |ULTIMATE.start_main_~out_len~0#1| 2147483647) (= |ULTIMATE.start_stpcpy_#t~post2#1.base| |ULTIMATE.start_stpcpy_~dst#1.base|) (<= 0 |ULTIMATE.start_stpcpy_#t~post2#1.base|) (<= |ULTIMATE.start_stpcpy_#in~dst#1.offset| 0) (= |ULTIMATE.start_main_#t~malloc6#1.offset| 0) (<= 0 |ULTIMATE.start_main_~in~0#1.base|) (<= 1 |ULTIMATE.start_stpcpy_#t~post2#1.offset|) (<= |ULTIMATE.start_main_~in~0#1.offset| 0) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_#t~malloc6#1.base|) (<= 0 |ULTIMATE.start_main_~out~0#1.base|) (<= 0 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_stpcpy_#in~dst#1.offset|) (<= 1 |ULTIMATE.start_main_~in_len~0#1|) (= |ULTIMATE.start_stpcpy_~dst#1.offset| (+ |ULTIMATE.start_stpcpy_#t~post2#1.offset| 1)) (<= 0 |ULTIMATE.start_main_~out~0#1.offset|) (<= 1 |ULTIMATE.start_stpcpy_#t~post3#1.offset|) (= |#NULL.base| 0) (<= 1 |ULTIMATE.start_main_~out_len~0#1|))' at error location [2022-11-19 07:44:53,002 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 07:44:53,002 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 07:44:53,002 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 16, 16] total 41 [2022-11-19 07:44:53,002 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2080886138] [2022-11-19 07:44:53,003 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 07:44:53,003 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-11-19 07:44:53,003 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:44:53,004 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-11-19 07:44:53,011 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=2249, Unknown=9, NotChecked=0, Total=2450 [2022-11-19 07:44:53,011 INFO L87 Difference]: Start difference. First operand 19 states and 19 transitions. Second operand has 42 states, 41 states have (on average 1.1951219512195121) internal successors, (49), 42 states have internal predecessors, (49), 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) [2022-11-19 07:44:54,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:44:54,777 INFO L93 Difference]: Finished difference Result 18 states and 18 transitions. [2022-11-19 07:44:54,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-19 07:44:54,778 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 41 states have (on average 1.1951219512195121) internal successors, (49), 42 states have internal predecessors, (49), 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 18 [2022-11-19 07:44:54,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:44:54,778 INFO L225 Difference]: With dead ends: 18 [2022-11-19 07:44:54,778 INFO L226 Difference]: Without dead ends: 0 [2022-11-19 07:44:54,781 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1061 ImplicationChecksByTransitivity, 8.6s TimeCoverageRelationStatistics Valid=377, Invalid=3904, Unknown=9, NotChecked=0, Total=4290 [2022-11-19 07:44:54,782 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 3 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 107 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 63 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 07:44:54,782 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 1 Invalid, 107 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 41 Invalid, 0 Unknown, 63 Unchecked, 0.1s Time] [2022-11-19 07:44:54,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-11-19 07:44:54,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-11-19 07:44:54,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 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) [2022-11-19 07:44:54,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-11-19 07:44:54,784 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 18 [2022-11-19 07:44:54,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:44:54,784 INFO L495 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-11-19 07:44:54,784 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 41 states have (on average 1.1951219512195121) internal successors, (49), 42 states have internal predecessors, (49), 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) [2022-11-19 07:44:54,784 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-11-19 07:44:54,784 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-11-19 07:44:54,787 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 7 remaining) [2022-11-19 07:44:54,788 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 7 remaining) [2022-11-19 07:44:54,788 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 7 remaining) [2022-11-19 07:44:54,788 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 7 remaining) [2022-11-19 07:44:54,789 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 7 remaining) [2022-11-19 07:44:54,789 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 7 remaining) [2022-11-19 07:44:54,789 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK (0 of 7 remaining) [2022-11-19 07:44:54,796 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1ad590c-19e8-4ed1-abf2-791c3f1297ed/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-19 07:44:54,996 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1ad590c-19e8-4ed1-abf2-791c3f1297ed/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:44:55,000 INFO L444 BasicCegarLoop]: Path program histogram: [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:44:55,003 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-11-19 07:44:55,007 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 19.11 07:44:55 BoogieIcfgContainer [2022-11-19 07:44:55,007 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-11-19 07:44:55,008 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-11-19 07:44:55,008 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-11-19 07:44:55,008 INFO L275 PluginConnector]: Witness Printer initialized [2022-11-19 07:44:55,009 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:44:08" (3/4) ... [2022-11-19 07:44:55,013 INFO L137 WitnessPrinter]: Generating witness for correct program [2022-11-19 07:44:55,024 INFO L915 BoogieBacktranslator]: Reduced CFG by removing 16 nodes and edges [2022-11-19 07:44:55,025 INFO L915 BoogieBacktranslator]: Reduced CFG by removing 5 nodes and edges [2022-11-19 07:44:55,025 INFO L915 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2022-11-19 07:44:55,025 INFO L915 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2022-11-19 07:44:55,059 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1ad590c-19e8-4ed1-abf2-791c3f1297ed/bin/utaipan-I9t0OCRTmS/witness.graphml [2022-11-19 07:44:55,060 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-11-19 07:44:55,060 INFO L158 Benchmark]: Toolchain (without parser) took 48123.71ms. Allocated memory was 115.3MB in the beginning and 243.3MB in the end (delta: 127.9MB). Free memory was 70.8MB in the beginning and 119.6MB in the end (delta: -48.8MB). Peak memory consumption was 79.3MB. Max. memory is 16.1GB. [2022-11-19 07:44:55,060 INFO L158 Benchmark]: CDTParser took 0.39ms. Allocated memory is still 115.3MB. Free memory is still 87.8MB. There was no memory consumed. Max. memory is 16.1GB. [2022-11-19 07:44:55,061 INFO L158 Benchmark]: CACSL2BoogieTranslator took 625.91ms. Allocated memory is still 115.3MB. Free memory was 70.6MB in the beginning and 83.1MB in the end (delta: -12.5MB). Peak memory consumption was 8.6MB. Max. memory is 16.1GB. [2022-11-19 07:44:55,062 INFO L158 Benchmark]: Boogie Procedure Inliner took 85.43ms. Allocated memory is still 115.3MB. Free memory was 83.1MB in the beginning and 81.3MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-11-19 07:44:55,063 INFO L158 Benchmark]: Boogie Preprocessor took 65.45ms. Allocated memory is still 115.3MB. Free memory was 81.3MB in the beginning and 80.1MB in the end (delta: 1.2MB). There was no memory consumed. Max. memory is 16.1GB. [2022-11-19 07:44:55,063 INFO L158 Benchmark]: RCFGBuilder took 525.82ms. Allocated memory is still 115.3MB. Free memory was 80.1MB in the beginning and 67.6MB in the end (delta: 12.5MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2022-11-19 07:44:55,064 INFO L158 Benchmark]: TraceAbstraction took 46761.32ms. Allocated memory was 115.3MB in the beginning and 243.3MB in the end (delta: 127.9MB). Free memory was 66.7MB in the beginning and 121.4MB in the end (delta: -54.7MB). Peak memory consumption was 74.7MB. Max. memory is 16.1GB. [2022-11-19 07:44:55,064 INFO L158 Benchmark]: Witness Printer took 51.74ms. Allocated memory is still 243.3MB. Free memory was 121.4MB in the beginning and 119.6MB in the end (delta: 1.8MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-11-19 07:44:55,067 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.39ms. Allocated memory is still 115.3MB. Free memory is still 87.8MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 625.91ms. Allocated memory is still 115.3MB. Free memory was 70.6MB in the beginning and 83.1MB in the end (delta: -12.5MB). Peak memory consumption was 8.6MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 85.43ms. Allocated memory is still 115.3MB. Free memory was 83.1MB in the beginning and 81.3MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 65.45ms. Allocated memory is still 115.3MB. Free memory was 81.3MB in the beginning and 80.1MB in the end (delta: 1.2MB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 525.82ms. Allocated memory is still 115.3MB. Free memory was 80.1MB in the beginning and 67.6MB in the end (delta: 12.5MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * TraceAbstraction took 46761.32ms. Allocated memory was 115.3MB in the beginning and 243.3MB in the end (delta: 127.9MB). Free memory was 66.7MB in the beginning and 121.4MB in the end (delta: -54.7MB). Peak memory consumption was 74.7MB. Max. memory is 16.1GB. * Witness Printer took 51.74ms. Allocated memory is still 243.3MB. Free memory was 121.4MB in the beginning and 119.6MB in the end (delta: 1.8MB). Peak memory consumption was 2.1MB. 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 - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 510]: all allocated memory was freed For all program executions holds that all allocated memory was freed at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 18 locations, 7 error locations. Started 1 CEGAR loops. OverallTime: 46.6s, OverallIterations: 13, TraceHistogramMax: 4, PathProgramHistogramMax: 3, EmptinessCheckTime: 0.0s, AutomataDifference: 6.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 165 SdHoareTripleChecker+Valid, 0.9s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 165 mSDsluCounter, 159 SdHoareTripleChecker+Invalid, 0.8s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 180 IncrementalHoareTripleChecker+Unchecked, 80 mSDsCounter, 30 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 585 IncrementalHoareTripleChecker+Invalid, 795 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 30 mSolverCounterUnsat, 79 mSDtfsCounter, 585 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 266 GetRequests, 53 SyntacticMatches, 4 SemanticMatches, 209 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2089 ImplicationChecksByTransitivity, 28.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=19occurred in iteration=9, 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, 13 MinimizatonAttempts, 14 StatesRemovedByMinimization, 6 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.4s SatisfiabilityAnalysisTime, 13.8s InterpolantComputationTime, 156 NumberOfCodeBlocks, 156 NumberOfCodeBlocksAsserted, 20 NumberOfCheckSat, 188 ConstructedInterpolants, 38 QuantifiedInterpolants, 3920 SizeOfPredicates, 86 NumberOfNonLiveVariables, 587 ConjunctsInSsa, 249 ConjunctsInUnsatCore, 21 InterpolantComputations, 9 PerfectInterpolantSequences, 6/93 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 - AllSpecificationsHoldResult: All specifications hold 7 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2022-11-19 07:44:55,092 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1ad590c-19e8-4ed1-abf2-791c3f1297ed/bin/utaipan-I9t0OCRTmS/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 Result: TRUE