./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/termination-15/cstrncat_reverse_alloca.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 38b53e6a Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f37157a-f649-4666-b806-a2dac3550f3b/bin/utaipan-ByfvJB40ur/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f37157a-f649-4666-b806-a2dac3550f3b/bin/utaipan-ByfvJB40ur/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f37157a-f649-4666-b806-a2dac3550f3b/bin/utaipan-ByfvJB40ur/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f37157a-f649-4666-b806-a2dac3550f3b/bin/utaipan-ByfvJB40ur/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/termination-15/cstrncat_reverse_alloca.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f37157a-f649-4666-b806-a2dac3550f3b/bin/utaipan-ByfvJB40ur/config/svcomp-DerefFreeMemtrack-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f37157a-f649-4666-b806-a2dac3550f3b/bin/utaipan-ByfvJB40ur --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash bccafd118bd3a0a83ff8db4cf42e66a78381136beaa46d7482d6d8b6c55b738f --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-38b53e6 [2022-11-25 23:35:41,108 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-25 23:35:41,111 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-25 23:35:41,154 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-25 23:35:41,163 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-25 23:35:41,167 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-25 23:35:41,169 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-25 23:35:41,172 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-25 23:35:41,174 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-25 23:35:41,179 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-25 23:35:41,180 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-25 23:35:41,182 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-25 23:35:41,183 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-25 23:35:41,185 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-25 23:35:41,187 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-25 23:35:41,189 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-25 23:35:41,191 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-25 23:35:41,192 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-25 23:35:41,194 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-25 23:35:41,201 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-25 23:35:41,214 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-25 23:35:41,216 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-25 23:35:41,218 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-25 23:35:41,219 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-25 23:35:41,228 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-25 23:35:41,229 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-25 23:35:41,230 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-25 23:35:41,232 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-25 23:35:41,232 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-25 23:35:41,234 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-25 23:35:41,235 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-25 23:35:41,236 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-25 23:35:41,237 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-25 23:35:41,240 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-25 23:35:41,241 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-25 23:35:41,241 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-25 23:35:41,242 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-25 23:35:41,242 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-25 23:35:41,242 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-25 23:35:41,244 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-25 23:35:41,244 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-25 23:35:41,245 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f37157a-f649-4666-b806-a2dac3550f3b/bin/utaipan-ByfvJB40ur/config/svcomp-DerefFreeMemtrack-64bit-Taipan_Default.epf [2022-11-25 23:35:41,285 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-25 23:35:41,285 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-25 23:35:41,286 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-25 23:35:41,286 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-25 23:35:41,287 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-25 23:35:41,288 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-25 23:35:41,288 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-25 23:35:41,288 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-25 23:35:41,288 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-25 23:35:41,289 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-25 23:35:41,290 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-25 23:35:41,290 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-25 23:35:41,290 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-25 23:35:41,290 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-25 23:35:41,291 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-25 23:35:41,291 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-25 23:35:41,291 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-25 23:35:41,291 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-25 23:35:41,292 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-25 23:35:41,292 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-25 23:35:41,293 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-25 23:35:41,293 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-25 23:35:41,293 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-25 23:35:41,293 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-25 23:35:41,294 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-11-25 23:35:41,294 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-11-25 23:35:41,294 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-11-25 23:35:41,295 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-25 23:35:41,295 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-25 23:35:41,295 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-25 23:35:41,296 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-25 23:35:41,296 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-25 23:35:41,296 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 23:35:41,296 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-25 23:35:41,296 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-25 23:35:41,297 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-25 23:35:41,297 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-25 23:35:41,297 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-25 23:35:41,297 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-25 23:35:41,298 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_2f37157a-f649-4666-b806-a2dac3550f3b/bin/utaipan-ByfvJB40ur/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f37157a-f649-4666-b806-a2dac3550f3b/bin/utaipan-ByfvJB40ur Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> bccafd118bd3a0a83ff8db4cf42e66a78381136beaa46d7482d6d8b6c55b738f [2022-11-25 23:35:41,567 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-25 23:35:41,639 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-25 23:35:41,643 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-25 23:35:41,644 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-25 23:35:41,658 INFO L275 PluginConnector]: CDTParser initialized [2022-11-25 23:35:41,660 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f37157a-f649-4666-b806-a2dac3550f3b/bin/utaipan-ByfvJB40ur/../../sv-benchmarks/c/termination-15/cstrncat_reverse_alloca.i [2022-11-25 23:35:44,716 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-25 23:35:44,976 INFO L351 CDTParser]: Found 1 translation units. [2022-11-25 23:35:44,977 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f37157a-f649-4666-b806-a2dac3550f3b/sv-benchmarks/c/termination-15/cstrncat_reverse_alloca.i [2022-11-25 23:35:44,987 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f37157a-f649-4666-b806-a2dac3550f3b/bin/utaipan-ByfvJB40ur/data/91556f848/0c95b6cc8d7f4ac1806efa332474a5fb/FLAGbb2206b4a [2022-11-25 23:35:45,002 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f37157a-f649-4666-b806-a2dac3550f3b/bin/utaipan-ByfvJB40ur/data/91556f848/0c95b6cc8d7f4ac1806efa332474a5fb [2022-11-25 23:35:45,005 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-25 23:35:45,006 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-25 23:35:45,008 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-25 23:35:45,008 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-25 23:35:45,012 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-25 23:35:45,013 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 11:35:45" (1/1) ... [2022-11-25 23:35:45,014 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7353f88 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:35:45, skipping insertion in model container [2022-11-25 23:35:45,014 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 11:35:45" (1/1) ... [2022-11-25 23:35:45,022 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-25 23:35:45,051 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-25 23:35:45,403 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 23:35:45,415 INFO L203 MainTranslator]: Completed pre-run [2022-11-25 23:35:45,455 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 23:35:45,485 INFO L208 MainTranslator]: Completed translation [2022-11-25 23:35:45,486 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:35:45 WrapperNode [2022-11-25 23:35:45,486 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-25 23:35:45,487 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-25 23:35:45,487 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-25 23:35:45,487 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-25 23:35:45,495 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:35:45" (1/1) ... [2022-11-25 23:35:45,507 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:35:45" (1/1) ... [2022-11-25 23:35:45,529 INFO L138 Inliner]: procedures = 152, calls = 16, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 87 [2022-11-25 23:35:45,530 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-25 23:35:45,530 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-25 23:35:45,530 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-25 23:35:45,531 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-25 23:35:45,540 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:35:45" (1/1) ... [2022-11-25 23:35:45,540 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:35:45" (1/1) ... [2022-11-25 23:35:45,542 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:35:45" (1/1) ... [2022-11-25 23:35:45,543 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:35:45" (1/1) ... [2022-11-25 23:35:45,548 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:35:45" (1/1) ... [2022-11-25 23:35:45,553 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:35:45" (1/1) ... [2022-11-25 23:35:45,554 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:35:45" (1/1) ... [2022-11-25 23:35:45,555 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:35:45" (1/1) ... [2022-11-25 23:35:45,557 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-25 23:35:45,558 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-25 23:35:45,558 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-25 23:35:45,558 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-25 23:35:45,559 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:35:45" (1/1) ... [2022-11-25 23:35:45,566 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 23:35:45,577 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f37157a-f649-4666-b806-a2dac3550f3b/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:35:45,592 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f37157a-f649-4666-b806-a2dac3550f3b/bin/utaipan-ByfvJB40ur/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-25 23:35:45,603 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f37157a-f649-4666-b806-a2dac3550f3b/bin/utaipan-ByfvJB40ur/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-25 23:35:45,633 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-25 23:35:45,633 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-25 23:35:45,633 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-25 23:35:45,639 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-25 23:35:45,640 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-25 23:35:45,641 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-25 23:35:45,722 INFO L235 CfgBuilder]: Building ICFG [2022-11-25 23:35:45,724 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-25 23:35:46,081 INFO L276 CfgBuilder]: Performing block encoding [2022-11-25 23:35:46,140 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-25 23:35:46,140 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2022-11-25 23:35:46,143 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 11:35:46 BoogieIcfgContainer [2022-11-25 23:35:46,143 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-25 23:35:46,145 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-25 23:35:46,145 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-25 23:35:46,148 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-25 23:35:46,149 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 11:35:45" (1/3) ... [2022-11-25 23:35:46,149 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@356c94fb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 11:35:46, skipping insertion in model container [2022-11-25 23:35:46,150 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:35:45" (2/3) ... [2022-11-25 23:35:46,150 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@356c94fb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 11:35:46, skipping insertion in model container [2022-11-25 23:35:46,150 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 11:35:46" (3/3) ... [2022-11-25 23:35:46,152 INFO L112 eAbstractionObserver]: Analyzing ICFG cstrncat_reverse_alloca.i [2022-11-25 23:35:46,171 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-25 23:35:46,171 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 15 error locations. [2022-11-25 23:35:46,218 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-25 23:35:46,225 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;@40bc4e89, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-25 23:35:46,225 INFO L358 AbstractCegarLoop]: Starting to check reachability of 15 error locations. [2022-11-25 23:35:46,230 INFO L276 IsEmpty]: Start isEmpty. Operand has 32 states, 16 states have (on average 2.375) internal successors, (38), 31 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:35:46,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-11-25 23:35:46,236 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:35:46,237 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-11-25 23:35:46,237 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-11-25 23:35:46,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:35:46,243 INFO L85 PathProgramCache]: Analyzing trace with hash 128615, now seen corresponding path program 1 times [2022-11-25 23:35:46,253 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:35:46,254 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1949300141] [2022-11-25 23:35:46,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:35:46,255 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:35:46,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:35:46,416 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:35:46,416 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:35:46,417 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1949300141] [2022-11-25 23:35:46,417 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1949300141] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 23:35:46,418 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 23:35:46,418 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-25 23:35:46,419 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [572678416] [2022-11-25 23:35:46,420 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 23:35:46,424 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 23:35:46,425 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:35:46,476 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 23:35:46,479 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 23:35:46,481 INFO L87 Difference]: Start difference. First operand has 32 states, 16 states have (on average 2.375) internal successors, (38), 31 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:35:46,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:35:46,570 INFO L93 Difference]: Finished difference Result 33 states and 37 transitions. [2022-11-25 23:35:46,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 23:35:46,573 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3 [2022-11-25 23:35:46,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:35:46,580 INFO L225 Difference]: With dead ends: 33 [2022-11-25 23:35:46,585 INFO L226 Difference]: Without dead ends: 31 [2022-11-25 23:35:46,588 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 23:35:46,592 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 1 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-25 23:35:46,595 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 46 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-25 23:35:46,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2022-11-25 23:35:46,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2022-11-25 23:35:46,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 16 states have (on average 2.125) internal successors, (34), 30 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:35:46,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 34 transitions. [2022-11-25 23:35:46,633 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 34 transitions. Word has length 3 [2022-11-25 23:35:46,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:35:46,633 INFO L495 AbstractCegarLoop]: Abstraction has 31 states and 34 transitions. [2022-11-25 23:35:46,634 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:35:46,634 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 34 transitions. [2022-11-25 23:35:46,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-11-25 23:35:46,634 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:35:46,635 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-11-25 23:35:46,635 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-25 23:35:46,635 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-11-25 23:35:46,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:35:46,636 INFO L85 PathProgramCache]: Analyzing trace with hash 128615, now seen corresponding path program 1 times [2022-11-25 23:35:46,637 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:35:46,637 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [565298464] [2022-11-25 23:35:46,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:35:46,637 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:35:46,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:35:46,911 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:35:46,912 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:35:46,912 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [565298464] [2022-11-25 23:35:46,912 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [565298464] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 23:35:46,913 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 23:35:46,913 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-25 23:35:46,913 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1711291140] [2022-11-25 23:35:46,916 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 23:35:46,917 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 23:35:46,917 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:35:46,918 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 23:35:46,922 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 23:35:46,922 INFO L87 Difference]: Start difference. First operand 31 states and 34 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) [2022-11-25 23:35:46,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:35:46,966 INFO L93 Difference]: Finished difference Result 30 states and 33 transitions. [2022-11-25 23:35:46,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 23:35:46,967 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 [2022-11-25 23:35:46,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:35:46,967 INFO L225 Difference]: With dead ends: 30 [2022-11-25 23:35:46,968 INFO L226 Difference]: Without dead ends: 30 [2022-11-25 23:35:46,968 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 [2022-11-25 23:35:46,970 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 28 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-25 23:35:46,970 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 17 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-25 23:35:46,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2022-11-25 23:35:46,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2022-11-25 23:35:46,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 16 states have (on average 2.0625) internal successors, (33), 29 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:35:46,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 33 transitions. [2022-11-25 23:35:46,975 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 33 transitions. Word has length 3 [2022-11-25 23:35:46,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:35:46,976 INFO L495 AbstractCegarLoop]: Abstraction has 30 states and 33 transitions. [2022-11-25 23:35:46,976 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) [2022-11-25 23:35:46,976 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 33 transitions. [2022-11-25 23:35:46,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-11-25 23:35:46,977 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:35:46,977 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-11-25 23:35:46,977 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-25 23:35:46,978 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-11-25 23:35:46,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:35:46,978 INFO L85 PathProgramCache]: Analyzing trace with hash 128616, now seen corresponding path program 1 times [2022-11-25 23:35:46,979 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:35:46,979 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [684624618] [2022-11-25 23:35:46,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:35:46,980 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:35:47,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:35:47,336 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:35:47,337 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:35:47,337 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [684624618] [2022-11-25 23:35:47,337 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [684624618] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 23:35:47,337 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 23:35:47,338 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-25 23:35:47,338 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [141607914] [2022-11-25 23:35:47,338 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 23:35:47,338 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-25 23:35:47,339 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:35:47,339 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-25 23:35:47,340 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-25 23:35:47,340 INFO L87 Difference]: Start difference. First operand 30 states and 33 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) [2022-11-25 23:35:47,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:35:47,393 INFO L93 Difference]: Finished difference Result 29 states and 32 transitions. [2022-11-25 23:35:47,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-25 23:35:47,394 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 [2022-11-25 23:35:47,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:35:47,395 INFO L225 Difference]: With dead ends: 29 [2022-11-25 23:35:47,395 INFO L226 Difference]: Without dead ends: 29 [2022-11-25 23:35:47,396 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-25 23:35:47,397 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 34 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-25 23:35:47,398 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 40 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-25 23:35:47,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2022-11-25 23:35:47,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2022-11-25 23:35:47,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 16 states have (on average 2.0) internal successors, (32), 28 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:35:47,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 32 transitions. [2022-11-25 23:35:47,402 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 32 transitions. Word has length 3 [2022-11-25 23:35:47,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:35:47,403 INFO L495 AbstractCegarLoop]: Abstraction has 29 states and 32 transitions. [2022-11-25 23:35:47,403 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) [2022-11-25 23:35:47,404 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 32 transitions. [2022-11-25 23:35:47,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-11-25 23:35:47,404 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:35:47,404 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-11-25 23:35:47,405 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-25 23:35:47,405 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-11-25 23:35:47,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:35:47,406 INFO L85 PathProgramCache]: Analyzing trace with hash 3987064, now seen corresponding path program 1 times [2022-11-25 23:35:47,406 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:35:47,406 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [106325488] [2022-11-25 23:35:47,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:35:47,407 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:35:47,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:35:47,492 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:35:47,493 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:35:47,493 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [106325488] [2022-11-25 23:35:47,493 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [106325488] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 23:35:47,494 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 23:35:47,494 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-25 23:35:47,494 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1363856256] [2022-11-25 23:35:47,494 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 23:35:47,495 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 23:35:47,495 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:35:47,496 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 23:35:47,496 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 23:35:47,496 INFO L87 Difference]: Start difference. First operand 29 states and 32 transitions. Second operand has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:35:47,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:35:47,526 INFO L93 Difference]: Finished difference Result 28 states and 31 transitions. [2022-11-25 23:35:47,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 23:35:47,527 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2022-11-25 23:35:47,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:35:47,528 INFO L225 Difference]: With dead ends: 28 [2022-11-25 23:35:47,528 INFO L226 Difference]: Without dead ends: 28 [2022-11-25 23:35:47,529 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 [2022-11-25 23:35:47,530 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 25 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-25 23:35:47,531 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 16 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-25 23:35:47,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2022-11-25 23:35:47,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2022-11-25 23:35:47,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 16 states have (on average 1.9375) internal successors, (31), 27 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:35:47,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 31 transitions. [2022-11-25 23:35:47,535 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 31 transitions. Word has length 4 [2022-11-25 23:35:47,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:35:47,536 INFO L495 AbstractCegarLoop]: Abstraction has 28 states and 31 transitions. [2022-11-25 23:35:47,536 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:35:47,536 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 31 transitions. [2022-11-25 23:35:47,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-11-25 23:35:47,537 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:35:47,537 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-11-25 23:35:47,537 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-25 23:35:47,538 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-11-25 23:35:47,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:35:47,538 INFO L85 PathProgramCache]: Analyzing trace with hash 3987065, now seen corresponding path program 1 times [2022-11-25 23:35:47,539 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:35:47,539 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1498900866] [2022-11-25 23:35:47,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:35:47,539 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:35:47,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:35:47,753 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:35:47,753 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:35:47,754 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1498900866] [2022-11-25 23:35:47,754 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1498900866] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 23:35:47,754 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 23:35:47,755 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-25 23:35:47,755 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1046798497] [2022-11-25 23:35:47,756 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 23:35:47,757 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-25 23:35:47,757 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:35:47,758 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-25 23:35:47,758 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-25 23:35:47,759 INFO L87 Difference]: Start difference. First operand 28 states and 31 transitions. Second operand has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:35:47,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:35:47,826 INFO L93 Difference]: Finished difference Result 27 states and 30 transitions. [2022-11-25 23:35:47,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-25 23:35:47,827 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2022-11-25 23:35:47,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:35:47,831 INFO L225 Difference]: With dead ends: 27 [2022-11-25 23:35:47,832 INFO L226 Difference]: Without dead ends: 27 [2022-11-25 23:35:47,832 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-25 23:35:47,836 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 29 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-25 23:35:47,839 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 39 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-25 23:35:47,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2022-11-25 23:35:47,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2022-11-25 23:35:47,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 16 states have (on average 1.875) internal successors, (30), 26 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:35:47,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 30 transitions. [2022-11-25 23:35:47,847 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 30 transitions. Word has length 4 [2022-11-25 23:35:47,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:35:47,847 INFO L495 AbstractCegarLoop]: Abstraction has 27 states and 30 transitions. [2022-11-25 23:35:47,847 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:35:47,848 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 30 transitions. [2022-11-25 23:35:47,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-11-25 23:35:47,848 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:35:47,848 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-11-25 23:35:47,849 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-25 23:35:47,849 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-11-25 23:35:47,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:35:47,850 INFO L85 PathProgramCache]: Analyzing trace with hash 123601006, now seen corresponding path program 1 times [2022-11-25 23:35:47,850 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:35:47,850 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1315976771] [2022-11-25 23:35:47,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:35:47,851 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:35:47,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:35:47,919 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:35:47,920 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:35:47,920 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1315976771] [2022-11-25 23:35:47,920 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1315976771] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 23:35:47,920 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 23:35:47,920 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-25 23:35:47,921 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [173178603] [2022-11-25 23:35:47,921 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 23:35:47,921 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-25 23:35:47,921 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:35:47,923 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-25 23:35:47,923 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-25 23:35:47,924 INFO L87 Difference]: Start difference. First operand 27 states and 30 transitions. Second operand has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 4 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:35:47,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:35:47,975 INFO L93 Difference]: Finished difference Result 23 states and 26 transitions. [2022-11-25 23:35:47,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-25 23:35:47,976 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 4 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2022-11-25 23:35:47,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:35:47,976 INFO L225 Difference]: With dead ends: 23 [2022-11-25 23:35:47,976 INFO L226 Difference]: Without dead ends: 23 [2022-11-25 23:35:47,976 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 [2022-11-25 23:35:47,977 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 38 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-25 23:35:47,978 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 10 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-25 23:35:47,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2022-11-25 23:35:47,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2022-11-25 23:35:47,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 16 states have (on average 1.625) internal successors, (26), 22 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:35:47,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 26 transitions. [2022-11-25 23:35:47,980 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 26 transitions. Word has length 5 [2022-11-25 23:35:47,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:35:47,981 INFO L495 AbstractCegarLoop]: Abstraction has 23 states and 26 transitions. [2022-11-25 23:35:47,981 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 4 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:35:47,981 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 26 transitions. [2022-11-25 23:35:47,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-11-25 23:35:47,981 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:35:47,981 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-11-25 23:35:47,982 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-25 23:35:47,982 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-11-25 23:35:47,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:35:47,982 INFO L85 PathProgramCache]: Analyzing trace with hash 123601007, now seen corresponding path program 1 times [2022-11-25 23:35:47,983 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:35:47,983 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1388212565] [2022-11-25 23:35:47,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:35:47,983 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:35:48,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:35:48,502 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:35:48,503 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:35:48,503 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1388212565] [2022-11-25 23:35:48,503 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1388212565] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 23:35:48,503 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 23:35:48,503 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-25 23:35:48,503 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [783928046] [2022-11-25 23:35:48,504 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 23:35:48,504 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-25 23:35:48,505 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:35:48,505 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-25 23:35:48,505 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-25 23:35:48,506 INFO L87 Difference]: Start difference. First operand 23 states and 26 transitions. Second operand has 5 states, 4 states have (on average 1.25) internal successors, (5), 4 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:35:48,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:35:48,624 INFO L93 Difference]: Finished difference Result 38 states and 44 transitions. [2022-11-25 23:35:48,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-25 23:35:48,625 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 1.25) internal successors, (5), 4 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2022-11-25 23:35:48,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:35:48,627 INFO L225 Difference]: With dead ends: 38 [2022-11-25 23:35:48,627 INFO L226 Difference]: Without dead ends: 38 [2022-11-25 23:35:48,627 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-11-25 23:35:48,630 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 59 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-25 23:35:48,630 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [59 Valid, 31 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-25 23:35:48,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2022-11-25 23:35:48,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 33. [2022-11-25 23:35:48,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 26 states have (on average 1.6153846153846154) internal successors, (42), 32 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:35:48,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 42 transitions. [2022-11-25 23:35:48,642 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 42 transitions. Word has length 5 [2022-11-25 23:35:48,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:35:48,642 INFO L495 AbstractCegarLoop]: Abstraction has 33 states and 42 transitions. [2022-11-25 23:35:48,642 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 1.25) internal successors, (5), 4 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:35:48,642 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 42 transitions. [2022-11-25 23:35:48,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-25 23:35:48,643 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:35:48,643 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-25 23:35:48,643 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-25 23:35:48,644 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-11-25 23:35:48,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:35:48,644 INFO L85 PathProgramCache]: Analyzing trace with hash -1478517080, now seen corresponding path program 1 times [2022-11-25 23:35:48,644 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:35:48,645 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1599464764] [2022-11-25 23:35:48,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:35:48,645 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:35:48,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:35:48,968 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:35:48,968 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:35:48,968 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1599464764] [2022-11-25 23:35:48,968 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1599464764] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 23:35:48,969 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1551187822] [2022-11-25 23:35:48,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:35:48,969 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:35:48,969 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f37157a-f649-4666-b806-a2dac3550f3b/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:35:48,972 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f37157a-f649-4666-b806-a2dac3550f3b/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 23:35:48,982 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f37157a-f649-4666-b806-a2dac3550f3b/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-25 23:35:49,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:35:49,073 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 37 conjunts are in the unsatisfiable core [2022-11-25 23:35:49,079 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:35:49,144 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-11-25 23:35:49,168 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-25 23:35:49,206 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-25 23:35:49,238 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 23:35:49,239 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 15 treesize of output 15 [2022-11-25 23:35:49,292 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:35:49,293 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:35:49,363 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 8 treesize of output 6 [2022-11-25 23:35:49,446 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 23:35:49,447 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 19 [2022-11-25 23:35:49,457 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 23:35:49,457 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 30 treesize of output 30 [2022-11-25 23:35:49,475 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:35:49,476 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1551187822] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 23:35:49,476 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1168349624] [2022-11-25 23:35:49,495 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-11-25 23:35:49,495 INFO L166 IcfgInterpreter]: Building call graph [2022-11-25 23:35:49,501 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-25 23:35:49,507 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-25 23:35:49,507 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-25 23:35:49,607 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:35:49,612 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:35:49,613 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2022-11-25 23:35:49,654 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-25 23:35:49,746 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:35:49,747 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 24 [2022-11-25 23:35:50,145 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-25 23:35:51,237 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '529#(and (<= |ULTIMATE.start_cstrncat_~s2#1.offset| 2147483645) (<= 0 |ULTIMATE.start_cstrncat_~s~0#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.offset|) (<= |ULTIMATE.start_cstrncat_~s~0#1.offset| 2147483645) (<= |ULTIMATE.start_main_~n~0#1| 2147483646) (= |ULTIMATE.start_main_#t~malloc217#1.offset| 0) (or (not (<= 0 |ULTIMATE.start_cstrncat_~s~0#1.offset|)) (not (<= (+ |ULTIMATE.start_cstrncat_~s~0#1.offset| 1) (select |#length| |ULTIMATE.start_cstrncat_~s~0#1.base|)))) (<= 0 |ULTIMATE.start_cstrncat_~s1#1.base|) (<= |ULTIMATE.start_main_~nondetString2~0#1.offset| 2147483645) (<= 1 |ULTIMATE.start_cstrncat_~n#1|) (<= 0 |ULTIMATE.start_main_#t~malloc217#1.base|) (= |ULTIMATE.start_main_#t~malloc216#1.offset| 0) (<= 0 |ULTIMATE.start_cstrncat_#in~s1#1.base|) (<= |ULTIMATE.start_main_~length2~0#1| 2147483646) (<= 0 |ULTIMATE.start_cstrncat_#in~s2#1.offset|) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.base|) (<= |ULTIMATE.start_cstrncat_#in~s1#1.offset| 2147483645) (<= 0 (+ 2147483645 |ULTIMATE.start_cstrncat_~s~0#1.offset|)) (<= 1 |ULTIMATE.start_main_~length2~0#1|) (<= 0 (+ 2147483645 |ULTIMATE.start_cstrncat_#in~s1#1.offset|)) (<= 0 |ULTIMATE.start_cstrncat_~s2#1.base|) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= 1 |ULTIMATE.start_main_~n~0#1|) (<= 0 |ULTIMATE.start_main_#t~malloc216#1.base|) (<= |ULTIMATE.start_cstrncat_#in~n#1| 2147483646) (<= |ULTIMATE.start_cstrncat_~s1#1.offset| 2147483645) (<= |ULTIMATE.start_cstrncat_#in~s2#1.offset| 2147483645) (<= 0 |ULTIMATE.start_cstrncat_~s2#1.offset|) (= |#NULL.offset| 0) (<= 0 (+ 2147483645 |ULTIMATE.start_main_~nondetString1~0#1.offset|)) (<= |ULTIMATE.start_cstrncat_~n#1| 2147483646) (<= 0 (+ 2147483645 |ULTIMATE.start_cstrncat_~s1#1.offset|)) (<= 1 |ULTIMATE.start_cstrncat_#in~n#1|) (<= 0 |ULTIMATE.start_cstrncat_#in~s2#1.base|) (<= 0 |#StackHeapBarrier|) (<= 2 |ULTIMATE.start_main_~length1~0#1|) (<= |ULTIMATE.start_main_~nondetString1~0#1.offset| 2147483645) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.base|) (= |#NULL.base| 0))' at error location [2022-11-25 23:35:51,237 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-25 23:35:51,237 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 23:35:51,237 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2022-11-25 23:35:51,238 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [700867145] [2022-11-25 23:35:51,238 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 23:35:51,238 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-25 23:35:51,238 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:35:51,239 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-25 23:35:51,239 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=285, Unknown=4, NotChecked=0, Total=342 [2022-11-25 23:35:51,239 INFO L87 Difference]: Start difference. First operand 33 states and 42 transitions. Second operand has 13 states, 12 states have (on average 1.3333333333333333) internal successors, (16), 13 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) [2022-11-25 23:35:51,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:35:51,633 INFO L93 Difference]: Finished difference Result 80 states and 93 transitions. [2022-11-25 23:35:51,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-25 23:35:51,634 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 1.3333333333333333) internal successors, (16), 13 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) Word has length 7 [2022-11-25 23:35:51,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:35:51,636 INFO L225 Difference]: With dead ends: 80 [2022-11-25 23:35:51,636 INFO L226 Difference]: Without dead ends: 80 [2022-11-25 23:35:51,636 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 6 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=120, Invalid=526, Unknown=4, NotChecked=0, Total=650 [2022-11-25 23:35:51,637 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 125 mSDsluCounter, 124 mSDsCounter, 0 mSdLazyCounter, 192 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 125 SdHoareTripleChecker+Valid, 141 SdHoareTripleChecker+Invalid, 213 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 192 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-25 23:35:51,637 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [125 Valid, 141 Invalid, 213 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 192 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-25 23:35:51,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2022-11-25 23:35:51,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 27. [2022-11-25 23:35:51,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 26 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:35:51,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 34 transitions. [2022-11-25 23:35:51,641 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 34 transitions. Word has length 7 [2022-11-25 23:35:51,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:35:51,641 INFO L495 AbstractCegarLoop]: Abstraction has 27 states and 34 transitions. [2022-11-25 23:35:51,641 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 1.3333333333333333) internal successors, (16), 13 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) [2022-11-25 23:35:51,642 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 34 transitions. [2022-11-25 23:35:51,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-25 23:35:51,642 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:35:51,642 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 23:35:51,655 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f37157a-f649-4666-b806-a2dac3550f3b/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-25 23:35:51,849 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f37157a-f649-4666-b806-a2dac3550f3b/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:35:51,849 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-11-25 23:35:51,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:35:51,850 INFO L85 PathProgramCache]: Analyzing trace with hash 779214776, now seen corresponding path program 1 times [2022-11-25 23:35:51,850 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:35:51,850 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [695635737] [2022-11-25 23:35:51,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:35:51,850 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:35:51,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:35:51,908 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:35:51,908 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:35:51,908 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [695635737] [2022-11-25 23:35:51,909 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [695635737] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 23:35:51,909 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 23:35:51,909 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-25 23:35:51,909 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1156472254] [2022-11-25 23:35:51,909 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 23:35:51,909 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-25 23:35:51,910 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:35:51,910 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-25 23:35:51,910 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-25 23:35:51,910 INFO L87 Difference]: Start difference. First operand 27 states and 34 transitions. Second operand has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:35:51,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:35:51,945 INFO L93 Difference]: Finished difference Result 27 states and 34 transitions. [2022-11-25 23:35:51,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-25 23:35:51,946 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-11-25 23:35:51,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:35:51,946 INFO L225 Difference]: With dead ends: 27 [2022-11-25 23:35:51,947 INFO L226 Difference]: Without dead ends: 27 [2022-11-25 23:35:51,947 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 [2022-11-25 23:35:51,948 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 17 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-25 23:35:51,948 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 22 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-25 23:35:51,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2022-11-25 23:35:51,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 26. [2022-11-25 23:35:51,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 25 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:35:51,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 32 transitions. [2022-11-25 23:35:51,957 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 32 transitions. Word has length 9 [2022-11-25 23:35:51,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:35:51,958 INFO L495 AbstractCegarLoop]: Abstraction has 26 states and 32 transitions. [2022-11-25 23:35:51,958 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:35:51,958 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 32 transitions. [2022-11-25 23:35:51,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-25 23:35:51,959 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:35:51,959 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 23:35:51,959 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-25 23:35:51,960 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-11-25 23:35:51,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:35:51,960 INFO L85 PathProgramCache]: Analyzing trace with hash 779214777, now seen corresponding path program 1 times [2022-11-25 23:35:51,960 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:35:51,961 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1437776356] [2022-11-25 23:35:51,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:35:51,961 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:35:51,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:35:52,327 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:35:52,327 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:35:52,328 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1437776356] [2022-11-25 23:35:52,328 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1437776356] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 23:35:52,328 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 23:35:52,328 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-25 23:35:52,328 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1763686591] [2022-11-25 23:35:52,328 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 23:35:52,329 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-25 23:35:52,329 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:35:52,329 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-25 23:35:52,329 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-25 23:35:52,329 INFO L87 Difference]: Start difference. First operand 26 states and 32 transitions. Second operand has 6 states, 5 states have (on average 1.8) internal successors, (9), 5 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:35:52,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:35:52,460 INFO L93 Difference]: Finished difference Result 39 states and 47 transitions. [2022-11-25 23:35:52,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-25 23:35:52,460 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 1.8) internal successors, (9), 5 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-11-25 23:35:52,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:35:52,461 INFO L225 Difference]: With dead ends: 39 [2022-11-25 23:35:52,461 INFO L226 Difference]: Without dead ends: 39 [2022-11-25 23:35:52,461 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2022-11-25 23:35:52,462 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 51 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-25 23:35:52,462 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [51 Valid, 37 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-25 23:35:52,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2022-11-25 23:35:52,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 31. [2022-11-25 23:35:52,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 27 states have (on average 1.4444444444444444) internal successors, (39), 30 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:35:52,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 39 transitions. [2022-11-25 23:35:52,465 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 39 transitions. Word has length 9 [2022-11-25 23:35:52,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:35:52,465 INFO L495 AbstractCegarLoop]: Abstraction has 31 states and 39 transitions. [2022-11-25 23:35:52,465 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 1.8) internal successors, (9), 5 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:35:52,465 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 39 transitions. [2022-11-25 23:35:52,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-25 23:35:52,466 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:35:52,466 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 23:35:52,466 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-11-25 23:35:52,466 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-11-25 23:35:52,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:35:52,467 INFO L85 PathProgramCache]: Analyzing trace with hash -291219936, now seen corresponding path program 1 times [2022-11-25 23:35:52,467 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:35:52,467 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1208259926] [2022-11-25 23:35:52,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:35:52,467 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:35:52,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:35:52,574 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:35:52,575 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:35:52,575 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1208259926] [2022-11-25 23:35:52,575 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1208259926] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 23:35:52,575 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 23:35:52,575 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-25 23:35:52,575 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1656684203] [2022-11-25 23:35:52,576 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 23:35:52,576 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-25 23:35:52,576 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:35:52,577 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-25 23:35:52,577 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-25 23:35:52,577 INFO L87 Difference]: Start difference. First operand 31 states and 39 transitions. Second operand has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:35:52,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:35:52,626 INFO L93 Difference]: Finished difference Result 33 states and 38 transitions. [2022-11-25 23:35:52,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-25 23:35:52,627 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-11-25 23:35:52,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:35:52,628 INFO L225 Difference]: With dead ends: 33 [2022-11-25 23:35:52,628 INFO L226 Difference]: Without dead ends: 33 [2022-11-25 23:35:52,628 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-25 23:35:52,629 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 49 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-25 23:35:52,629 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [49 Valid, 38 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-25 23:35:52,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2022-11-25 23:35:52,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 26. [2022-11-25 23:35:52,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 22 states have (on average 1.3636363636363635) internal successors, (30), 25 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:35:52,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 30 transitions. [2022-11-25 23:35:52,634 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 30 transitions. Word has length 13 [2022-11-25 23:35:52,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:35:52,635 INFO L495 AbstractCegarLoop]: Abstraction has 26 states and 30 transitions. [2022-11-25 23:35:52,635 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:35:52,635 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 30 transitions. [2022-11-25 23:35:52,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-25 23:35:52,636 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:35:52,636 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 23:35:52,636 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-11-25 23:35:52,636 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-11-25 23:35:52,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:35:52,637 INFO L85 PathProgramCache]: Analyzing trace with hash -161943338, now seen corresponding path program 1 times [2022-11-25 23:35:52,637 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:35:52,637 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [445956531] [2022-11-25 23:35:52,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:35:52,638 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:35:52,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:35:53,093 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:35:53,093 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:35:53,093 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [445956531] [2022-11-25 23:35:53,093 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [445956531] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 23:35:53,093 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1755681764] [2022-11-25 23:35:53,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:35:53,094 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:35:53,094 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f37157a-f649-4666-b806-a2dac3550f3b/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:35:53,095 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f37157a-f649-4666-b806-a2dac3550f3b/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 23:35:53,118 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f37157a-f649-4666-b806-a2dac3550f3b/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-25 23:35:53,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:35:53,178 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 33 conjunts are in the unsatisfiable core [2022-11-25 23:35:53,180 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:35:53,193 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-25 23:35:53,258 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 23:35:53,259 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 17 treesize of output 17 [2022-11-25 23:35:53,364 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:35:53,364 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:35:53,505 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 23:35:53,506 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 20 treesize of output 24 [2022-11-25 23:35:53,607 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 10 treesize of output 8 [2022-11-25 23:35:53,609 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 [2022-11-25 23:35:53,616 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:35:53,617 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1755681764] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 23:35:53,617 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [324306930] [2022-11-25 23:35:53,621 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2022-11-25 23:35:53,621 INFO L166 IcfgInterpreter]: Building call graph [2022-11-25 23:35:53,622 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-25 23:35:53,622 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-25 23:35:53,622 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-25 23:35:53,684 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:35:53,687 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:35:53,688 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2022-11-25 23:35:53,721 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-25 23:35:53,777 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:35:53,778 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 29 [2022-11-25 23:35:54,028 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:35:54,029 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:35:54,032 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:35:54,032 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:35:54,055 INFO L321 Elim1Store]: treesize reduction 58, result has 18.3 percent of original size [2022-11-25 23:35:54,055 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 51 treesize of output 52 [2022-11-25 23:35:54,293 INFO L321 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2022-11-25 23:35:54,294 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 [2022-11-25 23:35:54,512 INFO L321 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2022-11-25 23:35:54,512 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 [2022-11-25 23:35:54,633 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-25 23:35:57,182 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '963#(and (<= |ULTIMATE.start_cstrncat_#t~post207#1.offset| 2147483645) (<= 0 |ULTIMATE.start_cstrncat_~s~0#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.offset|) (<= |ULTIMATE.start_cstrncat_~s~0#1.offset| 2147483645) (<= |ULTIMATE.start_cstrncat_~s2#1.offset| 2147483644) (<= |ULTIMATE.start_main_~n~0#1| 2147483646) (= |ULTIMATE.start_main_#t~malloc217#1.offset| 0) (<= 0 |ULTIMATE.start_cstrncat_~s1#1.base|) (<= 0 |ULTIMATE.start_cstrncat_#in~s1#1.offset|) (<= |ULTIMATE.start_main_~nondetString2~0#1.offset| 2147483645) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.offset|) (<= 0 |ULTIMATE.start_main_#t~malloc217#1.base|) (= |ULTIMATE.start_main_#t~malloc216#1.offset| 0) (<= 0 |ULTIMATE.start_cstrncat_#in~s1#1.base|) (<= |ULTIMATE.start_main_~length2~0#1| 2147483646) (<= 0 |ULTIMATE.start_cstrncat_#in~s2#1.offset|) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.base|) (<= |ULTIMATE.start_cstrncat_#in~s1#1.offset| 2147483645) (<= 0 |ULTIMATE.start_cstrncat_~s1#1.offset|) (<= 1 |ULTIMATE.start_main_~length2~0#1|) (<= 0 |ULTIMATE.start_cstrncat_~s2#1.base|) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= 0 |ULTIMATE.start_cstrncat_#t~post207#1.base|) (<= 1 |ULTIMATE.start_main_~n~0#1|) (<= 0 |ULTIMATE.start_main_#t~malloc216#1.base|) (<= |ULTIMATE.start_cstrncat_#in~n#1| 2147483646) (or (not (<= (+ |ULTIMATE.start_cstrncat_#t~post207#1.offset| 1) (select |#length| |ULTIMATE.start_cstrncat_#t~post207#1.base|))) (not (<= 0 |ULTIMATE.start_cstrncat_#t~post207#1.offset|))) (<= |ULTIMATE.start_cstrncat_~s1#1.offset| 2147483645) (<= |ULTIMATE.start_cstrncat_#in~s2#1.offset| 2147483645) (= |#NULL.offset| 0) (<= |ULTIMATE.start_cstrncat_~n#1| 2147483646) (<= 1 |ULTIMATE.start_cstrncat_#in~n#1|) (<= 0 |ULTIMATE.start_cstrncat_#in~s2#1.base|) (<= 0 |#StackHeapBarrier|) (<= 2 |ULTIMATE.start_main_~length1~0#1|) (<= |ULTIMATE.start_main_~nondetString1~0#1.offset| 2147483645) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.base|) (= |#NULL.base| 0))' at error location [2022-11-25 23:35:57,183 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-25 23:35:57,183 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 23:35:57,183 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 17 [2022-11-25 23:35:57,183 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [204101293] [2022-11-25 23:35:57,183 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 23:35:57,184 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-25 23:35:57,184 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:35:57,186 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-25 23:35:57,186 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=712, Unknown=0, NotChecked=0, Total=812 [2022-11-25 23:35:57,188 INFO L87 Difference]: Start difference. First operand 26 states and 30 transitions. Second operand has 18 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:35:57,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:35:57,515 INFO L93 Difference]: Finished difference Result 41 states and 49 transitions. [2022-11-25 23:35:57,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-25 23:35:57,516 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-11-25 23:35:57,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:35:57,516 INFO L225 Difference]: With dead ends: 41 [2022-11-25 23:35:57,516 INFO L226 Difference]: Without dead ends: 41 [2022-11-25 23:35:57,517 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 252 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=122, Invalid=808, Unknown=0, NotChecked=0, Total=930 [2022-11-25 23:35:57,518 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 49 mSDsluCounter, 113 mSDsCounter, 0 mSdLazyCounter, 230 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 133 SdHoareTripleChecker+Invalid, 236 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 230 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-25 23:35:57,518 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [49 Valid, 133 Invalid, 236 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 230 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-25 23:35:57,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2022-11-25 23:35:57,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 30. [2022-11-25 23:35:57,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 26 states have (on average 1.3846153846153846) internal successors, (36), 29 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:35:57,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 36 transitions. [2022-11-25 23:35:57,520 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 36 transitions. Word has length 14 [2022-11-25 23:35:57,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:35:57,520 INFO L495 AbstractCegarLoop]: Abstraction has 30 states and 36 transitions. [2022-11-25 23:35:57,521 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:35:57,521 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 36 transitions. [2022-11-25 23:35:57,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-25 23:35:57,521 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:35:57,521 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 23:35:57,531 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f37157a-f649-4666-b806-a2dac3550f3b/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-11-25 23:35:57,726 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f37157a-f649-4666-b806-a2dac3550f3b/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:35:57,727 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-11-25 23:35:57,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:35:57,727 INFO L85 PathProgramCache]: Analyzing trace with hash -726438748, now seen corresponding path program 1 times [2022-11-25 23:35:57,727 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:35:57,728 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1520183319] [2022-11-25 23:35:57,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:35:57,728 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:35:57,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:35:57,894 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:35:57,894 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:35:57,894 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1520183319] [2022-11-25 23:35:57,894 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1520183319] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 23:35:57,895 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 23:35:57,895 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-25 23:35:57,895 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1973962607] [2022-11-25 23:35:57,895 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 23:35:57,895 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-25 23:35:57,895 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:35:57,896 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-25 23:35:57,896 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-25 23:35:57,897 INFO L87 Difference]: Start difference. First operand 30 states and 36 transitions. Second operand has 4 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:35:57,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:35:57,923 INFO L93 Difference]: Finished difference Result 29 states and 35 transitions. [2022-11-25 23:35:57,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-25 23:35:57,924 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-11-25 23:35:57,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:35:57,925 INFO L225 Difference]: With dead ends: 29 [2022-11-25 23:35:57,925 INFO L226 Difference]: Without dead ends: 24 [2022-11-25 23:35:57,925 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 [2022-11-25 23:35:57,926 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 8 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-25 23:35:57,926 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 24 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-25 23:35:57,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2022-11-25 23:35:57,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2022-11-25 23:35:57,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 21 states have (on average 1.2857142857142858) internal successors, (27), 23 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:35:57,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 27 transitions. [2022-11-25 23:35:57,934 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 27 transitions. Word has length 15 [2022-11-25 23:35:57,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:35:57,934 INFO L495 AbstractCegarLoop]: Abstraction has 24 states and 27 transitions. [2022-11-25 23:35:57,934 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:35:57,935 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 27 transitions. [2022-11-25 23:35:57,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-25 23:35:57,935 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:35:57,935 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 23:35:57,935 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-11-25 23:35:57,936 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-11-25 23:35:57,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:35:57,937 INFO L85 PathProgramCache]: Analyzing trace with hash -725276184, now seen corresponding path program 1 times [2022-11-25 23:35:57,937 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:35:57,937 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1333258130] [2022-11-25 23:35:57,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:35:57,937 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:35:57,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:35:58,171 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:35:58,172 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:35:58,172 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1333258130] [2022-11-25 23:35:58,172 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1333258130] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 23:35:58,172 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [768030011] [2022-11-25 23:35:58,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:35:58,172 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:35:58,172 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f37157a-f649-4666-b806-a2dac3550f3b/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:35:58,173 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f37157a-f649-4666-b806-a2dac3550f3b/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 23:35:58,194 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f37157a-f649-4666-b806-a2dac3550f3b/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-25 23:35:58,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:35:58,261 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 32 conjunts are in the unsatisfiable core [2022-11-25 23:35:58,263 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:35:58,369 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:35:58,369 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:35:58,530 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 8 treesize of output 6 [2022-11-25 23:35:58,590 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:35:58,591 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [768030011] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 23:35:58,591 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [175209419] [2022-11-25 23:35:58,594 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2022-11-25 23:35:58,594 INFO L166 IcfgInterpreter]: Building call graph [2022-11-25 23:35:58,594 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-25 23:35:58,595 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-25 23:35:58,595 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-25 23:35:58,661 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:35:58,665 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:35:58,666 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2022-11-25 23:35:58,693 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-25 23:35:58,764 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:35:58,765 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2022-11-25 23:35:58,987 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:35:58,988 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:35:58,991 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:35:58,992 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:35:59,015 INFO L321 Elim1Store]: treesize reduction 33, result has 17.5 percent of original size [2022-11-25 23:35:59,019 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 40 treesize of output 41 [2022-11-25 23:35:59,227 INFO L321 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2022-11-25 23:35:59,227 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 [2022-11-25 23:35:59,429 INFO L321 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2022-11-25 23:35:59,429 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 [2022-11-25 23:35:59,535 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-25 23:36:02,014 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1207#(and (<= |ULTIMATE.start_cstrncat_#t~post207#1.offset| 2147483645) (<= 0 |ULTIMATE.start_cstrncat_~s~0#1.base|) (<= (+ |ULTIMATE.start_cstrncat_#t~post207#1.offset| 1) (select |#length| |ULTIMATE.start_cstrncat_#t~post207#1.base|)) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.offset|) (<= |ULTIMATE.start_cstrncat_~s~0#1.offset| 2147483645) (<= |ULTIMATE.start_cstrncat_~s2#1.offset| 2147483644) (<= |ULTIMATE.start_main_~n~0#1| 2147483646) (= |ULTIMATE.start_main_#t~malloc217#1.offset| 0) (or (not (<= 0 |ULTIMATE.start_cstrncat_~s~0#1.offset|)) (not (<= (+ |ULTIMATE.start_cstrncat_~s~0#1.offset| 1) (select |#length| |ULTIMATE.start_cstrncat_~s~0#1.base|)))) (<= 0 |ULTIMATE.start_cstrncat_~s1#1.base|) (<= 0 |ULTIMATE.start_cstrncat_#in~s1#1.offset|) (<= |ULTIMATE.start_main_~nondetString2~0#1.offset| 2147483645) (= (select |#valid| |ULTIMATE.start_cstrncat_#t~post207#1.base|) 1) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.offset|) (<= 0 |ULTIMATE.start_main_#t~malloc217#1.base|) (= |ULTIMATE.start_main_#t~malloc216#1.offset| 0) (<= 0 |ULTIMATE.start_cstrncat_#in~s1#1.base|) (<= |ULTIMATE.start_main_~length2~0#1| 2147483646) (<= 0 |ULTIMATE.start_cstrncat_#in~s2#1.offset|) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.base|) (<= |ULTIMATE.start_cstrncat_#in~s1#1.offset| 2147483645) (<= 0 |ULTIMATE.start_cstrncat_~s1#1.offset|) (= (select (select |#memory_int| |ULTIMATE.start_cstrncat_#t~post207#1.base|) |ULTIMATE.start_cstrncat_#t~post207#1.offset|) |ULTIMATE.start_cstrncat_#t~mem208#1|) (<= 1 |ULTIMATE.start_main_~length2~0#1|) (<= 0 |ULTIMATE.start_cstrncat_~s2#1.base|) (<= 0 |ULTIMATE.start_cstrncat_#t~post207#1.offset|) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= 0 |ULTIMATE.start_cstrncat_#t~post207#1.base|) (<= 1 |ULTIMATE.start_main_~n~0#1|) (<= 0 |ULTIMATE.start_main_#t~malloc216#1.base|) (<= |ULTIMATE.start_cstrncat_#in~n#1| 2147483646) (<= |ULTIMATE.start_cstrncat_~s1#1.offset| 2147483645) (<= |ULTIMATE.start_cstrncat_#in~s2#1.offset| 2147483645) (= |#NULL.offset| 0) (<= |ULTIMATE.start_cstrncat_~n#1| 2147483646) (<= 1 |ULTIMATE.start_cstrncat_#in~n#1|) (<= 0 |ULTIMATE.start_cstrncat_#in~s2#1.base|) (<= 0 |#StackHeapBarrier|) (<= 2 |ULTIMATE.start_main_~length1~0#1|) (<= |ULTIMATE.start_main_~nondetString1~0#1.offset| 2147483645) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.base|) (= |#NULL.base| 0))' at error location [2022-11-25 23:36:02,014 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-25 23:36:02,014 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 23:36:02,014 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 16 [2022-11-25 23:36:02,014 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [759247775] [2022-11-25 23:36:02,015 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 23:36:02,015 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-11-25 23:36:02,015 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:36:02,016 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-11-25 23:36:02,016 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=635, Unknown=0, NotChecked=0, Total=756 [2022-11-25 23:36:02,016 INFO L87 Difference]: Start difference. First operand 24 states and 27 transitions. Second operand has 17 states, 16 states have (on average 2.0) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:36:02,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:36:02,442 INFO L93 Difference]: Finished difference Result 43 states and 49 transitions. [2022-11-25 23:36:02,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-25 23:36:02,443 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 2.0) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-11-25 23:36:02,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:36:02,443 INFO L225 Difference]: With dead ends: 43 [2022-11-25 23:36:02,443 INFO L226 Difference]: Without dead ends: 43 [2022-11-25 23:36:02,444 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 303 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=227, Invalid=1033, Unknown=0, NotChecked=0, Total=1260 [2022-11-25 23:36:02,445 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 61 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 188 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 194 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 188 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-25 23:36:02,445 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [61 Valid, 64 Invalid, 194 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 188 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-25 23:36:02,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2022-11-25 23:36:02,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 39. [2022-11-25 23:36:02,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 36 states have (on average 1.2777777777777777) internal successors, (46), 38 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:36:02,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 46 transitions. [2022-11-25 23:36:02,447 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 46 transitions. Word has length 15 [2022-11-25 23:36:02,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:36:02,448 INFO L495 AbstractCegarLoop]: Abstraction has 39 states and 46 transitions. [2022-11-25 23:36:02,448 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 2.0) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:36:02,448 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 46 transitions. [2022-11-25 23:36:02,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-25 23:36:02,449 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:36:02,449 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 23:36:02,462 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f37157a-f649-4666-b806-a2dac3550f3b/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-25 23:36:02,649 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f37157a-f649-4666-b806-a2dac3550f3b/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-11-25 23:36:02,649 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-11-25 23:36:02,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:36:02,650 INFO L85 PathProgramCache]: Analyzing trace with hash -725267148, now seen corresponding path program 1 times [2022-11-25 23:36:02,650 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:36:02,650 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1417708972] [2022-11-25 23:36:02,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:36:02,651 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:36:02,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:36:03,058 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:36:03,058 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:36:03,058 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1417708972] [2022-11-25 23:36:03,058 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1417708972] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 23:36:03,058 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [797301119] [2022-11-25 23:36:03,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:36:03,059 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:36:03,059 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f37157a-f649-4666-b806-a2dac3550f3b/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:36:03,060 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f37157a-f649-4666-b806-a2dac3550f3b/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 23:36:03,082 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f37157a-f649-4666-b806-a2dac3550f3b/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-25 23:36:03,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:36:03,147 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 48 conjunts are in the unsatisfiable core [2022-11-25 23:36:03,149 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:36:03,212 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-25 23:36:03,364 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 23:36:03,365 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 15 treesize of output 15 [2022-11-25 23:36:03,494 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:36:03,494 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:36:03,736 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 8 treesize of output 6 [2022-11-25 23:36:03,794 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 10 treesize of output 8 [2022-11-25 23:36:03,799 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 [2022-11-25 23:36:03,873 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:36:03,873 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [797301119] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 23:36:03,873 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [698790053] [2022-11-25 23:36:03,875 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2022-11-25 23:36:03,876 INFO L166 IcfgInterpreter]: Building call graph [2022-11-25 23:36:03,876 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-25 23:36:03,876 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-25 23:36:03,876 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-25 23:36:03,923 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:36:03,928 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:36:03,929 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2022-11-25 23:36:03,966 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-25 23:36:04,022 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:36:04,023 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 24 treesize of output 23 [2022-11-25 23:36:04,246 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:36:04,247 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:36:04,249 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:36:04,269 INFO L321 Elim1Store]: treesize reduction 37, result has 15.9 percent of original size [2022-11-25 23:36:04,269 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 45 treesize of output 46 [2022-11-25 23:36:04,557 INFO L321 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2022-11-25 23:36:04,557 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 [2022-11-25 23:36:04,796 INFO L321 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2022-11-25 23:36:04,797 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 [2022-11-25 23:36:05,040 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-25 23:36:07,629 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1422#(and (<= 0 |ULTIMATE.start_cstrncat_~s~0#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.offset|) (<= |ULTIMATE.start_cstrncat_~s~0#1.offset| 2147483645) (<= |ULTIMATE.start_cstrncat_~s2#1.offset| 2147483644) (<= |ULTIMATE.start_main_~n~0#1| 2147483646) (= |ULTIMATE.start_main_#t~malloc217#1.offset| 0) (or (not (<= 0 |ULTIMATE.start_cstrncat_~s~0#1.offset|)) (not (<= (+ |ULTIMATE.start_cstrncat_~s~0#1.offset| 1) (select |#length| |ULTIMATE.start_cstrncat_~s~0#1.base|)))) (<= 0 |ULTIMATE.start_cstrncat_~s1#1.base|) (<= 0 |ULTIMATE.start_cstrncat_#in~s1#1.offset|) (<= |ULTIMATE.start_main_~nondetString2~0#1.offset| 2147483645) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.offset|) (<= 0 |ULTIMATE.start_main_#t~malloc217#1.base|) (= |ULTIMATE.start_main_#t~malloc216#1.offset| 0) (<= 0 |ULTIMATE.start_cstrncat_#in~s1#1.base|) (<= |ULTIMATE.start_main_~length2~0#1| 2147483646) (<= 0 |ULTIMATE.start_cstrncat_#in~s2#1.offset|) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.base|) (<= |ULTIMATE.start_cstrncat_#in~s1#1.offset| 2147483645) (<= 0 |ULTIMATE.start_cstrncat_~s1#1.offset|) (<= 1 |ULTIMATE.start_main_~length2~0#1|) (<= 0 |ULTIMATE.start_cstrncat_~s2#1.base|) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= 1 |ULTIMATE.start_main_~n~0#1|) (<= 0 |ULTIMATE.start_main_#t~malloc216#1.base|) (<= |ULTIMATE.start_cstrncat_#in~n#1| 2147483646) (<= |ULTIMATE.start_cstrncat_~s1#1.offset| 2147483645) (<= |ULTIMATE.start_cstrncat_#in~s2#1.offset| 2147483645) (= |#NULL.offset| 0) (<= |ULTIMATE.start_cstrncat_~n#1| 2147483646) (<= 1 |ULTIMATE.start_cstrncat_#in~n#1|) (<= 0 |ULTIMATE.start_cstrncat_#in~s2#1.base|) (<= 0 |#StackHeapBarrier|) (<= 2 |ULTIMATE.start_main_~length1~0#1|) (<= |ULTIMATE.start_main_~nondetString1~0#1.offset| 2147483645) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.base|) (= |#NULL.base| 0))' at error location [2022-11-25 23:36:07,629 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-25 23:36:07,629 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 23:36:07,629 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 21 [2022-11-25 23:36:07,629 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1498252351] [2022-11-25 23:36:07,629 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 23:36:07,630 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-11-25 23:36:07,630 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:36:07,630 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-11-25 23:36:07,631 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=933, Unknown=0, NotChecked=0, Total=1056 [2022-11-25 23:36:07,631 INFO L87 Difference]: Start difference. First operand 39 states and 46 transitions. Second operand has 22 states, 21 states have (on average 1.8571428571428572) internal successors, (39), 22 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:36:08,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:36:08,528 INFO L93 Difference]: Finished difference Result 48 states and 56 transitions. [2022-11-25 23:36:08,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-25 23:36:08,529 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 1.8571428571428572) internal successors, (39), 22 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-11-25 23:36:08,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:36:08,529 INFO L225 Difference]: With dead ends: 48 [2022-11-25 23:36:08,530 INFO L226 Difference]: Without dead ends: 47 [2022-11-25 23:36:08,530 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 372 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=224, Invalid=1498, Unknown=0, NotChecked=0, Total=1722 [2022-11-25 23:36:08,531 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 43 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 197 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 210 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 197 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-25 23:36:08,531 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 49 Invalid, 210 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 197 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-25 23:36:08,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2022-11-25 23:36:08,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 44. [2022-11-25 23:36:08,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 41 states have (on average 1.2682926829268293) internal successors, (52), 43 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:36:08,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 52 transitions. [2022-11-25 23:36:08,533 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 52 transitions. Word has length 15 [2022-11-25 23:36:08,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:36:08,533 INFO L495 AbstractCegarLoop]: Abstraction has 44 states and 52 transitions. [2022-11-25 23:36:08,533 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 1.8571428571428572) internal successors, (39), 22 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:36:08,534 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 52 transitions. [2022-11-25 23:36:08,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-11-25 23:36:08,534 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:36:08,534 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 23:36:08,552 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f37157a-f649-4666-b806-a2dac3550f3b/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-25 23:36:08,752 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f37157a-f649-4666-b806-a2dac3550f3b/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-11-25 23:36:08,752 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-11-25 23:36:08,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:36:08,752 INFO L85 PathProgramCache]: Analyzing trace with hash -716892959, now seen corresponding path program 1 times [2022-11-25 23:36:08,752 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:36:08,753 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1826965842] [2022-11-25 23:36:08,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:36:08,753 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:36:08,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-25 23:36:08,778 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-25 23:36:08,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-25 23:36:08,837 INFO L130 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2022-11-25 23:36:08,837 INFO L360 BasicCegarLoop]: Counterexample is feasible [2022-11-25 23:36:08,839 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (14 of 15 remaining) [2022-11-25 23:36:08,840 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (13 of 15 remaining) [2022-11-25 23:36:08,841 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (12 of 15 remaining) [2022-11-25 23:36:08,841 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (11 of 15 remaining) [2022-11-25 23:36:08,841 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 15 remaining) [2022-11-25 23:36:08,842 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 15 remaining) [2022-11-25 23:36:08,842 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 15 remaining) [2022-11-25 23:36:08,842 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 15 remaining) [2022-11-25 23:36:08,842 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 15 remaining) [2022-11-25 23:36:08,842 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 15 remaining) [2022-11-25 23:36:08,843 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 15 remaining) [2022-11-25 23:36:08,843 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 15 remaining) [2022-11-25 23:36:08,843 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 15 remaining) [2022-11-25 23:36:08,843 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 15 remaining) [2022-11-25 23:36:08,843 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK (0 of 15 remaining) [2022-11-25 23:36:08,844 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-11-25 23:36:08,847 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 23:36:08,853 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-11-25 23:36:08,908 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 25.11 11:36:08 BoogieIcfgContainer [2022-11-25 23:36:08,908 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-11-25 23:36:08,909 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-11-25 23:36:08,909 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-11-25 23:36:08,910 INFO L275 PluginConnector]: Witness Printer initialized [2022-11-25 23:36:08,910 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 11:35:46" (3/4) ... [2022-11-25 23:36:08,912 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2022-11-25 23:36:08,974 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f37157a-f649-4666-b806-a2dac3550f3b/bin/utaipan-ByfvJB40ur/witness.graphml [2022-11-25 23:36:08,974 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-11-25 23:36:08,976 INFO L158 Benchmark]: Toolchain (without parser) took 23968.83ms. Allocated memory was 146.8MB in the beginning and 255.9MB in the end (delta: 109.1MB). Free memory was 112.4MB in the beginning and 203.0MB in the end (delta: -90.6MB). Peak memory consumption was 18.5MB. Max. memory is 16.1GB. [2022-11-25 23:36:08,977 INFO L158 Benchmark]: CDTParser took 0.19ms. Allocated memory is still 113.2MB. Free memory is still 87.2MB. There was no memory consumed. Max. memory is 16.1GB. [2022-11-25 23:36:08,977 INFO L158 Benchmark]: CACSL2BoogieTranslator took 478.42ms. Allocated memory is still 146.8MB. Free memory was 111.8MB in the beginning and 94.1MB in the end (delta: 17.7MB). Peak memory consumption was 18.9MB. Max. memory is 16.1GB. [2022-11-25 23:36:08,978 INFO L158 Benchmark]: Boogie Procedure Inliner took 42.93ms. Allocated memory is still 146.8MB. Free memory was 94.1MB in the beginning and 92.0MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-11-25 23:36:08,978 INFO L158 Benchmark]: Boogie Preprocessor took 26.78ms. Allocated memory is still 146.8MB. Free memory was 92.0MB in the beginning and 90.8MB in the end (delta: 1.2MB). There was no memory consumed. Max. memory is 16.1GB. [2022-11-25 23:36:08,978 INFO L158 Benchmark]: RCFGBuilder took 585.32ms. Allocated memory is still 146.8MB. Free memory was 90.8MB in the beginning and 108.0MB in the end (delta: -17.2MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2022-11-25 23:36:08,979 INFO L158 Benchmark]: TraceAbstraction took 22763.17ms. Allocated memory was 146.8MB in the beginning and 255.9MB in the end (delta: 109.1MB). Free memory was 107.0MB in the beginning and 206.1MB in the end (delta: -99.2MB). Peak memory consumption was 14.0MB. Max. memory is 16.1GB. [2022-11-25 23:36:08,979 INFO L158 Benchmark]: Witness Printer took 65.84ms. Allocated memory is still 255.9MB. Free memory was 206.1MB in the beginning and 203.0MB in the end (delta: 3.2MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-11-25 23:36:08,981 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.19ms. Allocated memory is still 113.2MB. Free memory is still 87.2MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 478.42ms. Allocated memory is still 146.8MB. Free memory was 111.8MB in the beginning and 94.1MB in the end (delta: 17.7MB). Peak memory consumption was 18.9MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 42.93ms. Allocated memory is still 146.8MB. Free memory was 94.1MB in the beginning and 92.0MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 26.78ms. Allocated memory is still 146.8MB. Free memory was 92.0MB in the beginning and 90.8MB in the end (delta: 1.2MB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 585.32ms. Allocated memory is still 146.8MB. Free memory was 90.8MB in the beginning and 108.0MB in the end (delta: -17.2MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * TraceAbstraction took 22763.17ms. Allocated memory was 146.8MB in the beginning and 255.9MB in the end (delta: 109.1MB). Free memory was 107.0MB in the beginning and 206.1MB in the end (delta: -99.2MB). Peak memory consumption was 14.0MB. Max. memory is 16.1GB. * Witness Printer took 65.84ms. Allocated memory is still 255.9MB. Free memory was 206.1MB in the beginning and 203.0MB in the end (delta: 3.2MB). 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 - CounterExampleResult [Line: -1]: pointer dereference may fail pointer dereference may fail We found a FailurePath: [L378] int length1 = __VERIFIER_nondet_int(); [L379] int length2 = __VERIFIER_nondet_int(); [L380] int n = __VERIFIER_nondet_int(); [L381] COND FALSE !(length1 < 1) [L384] COND FALSE !(length2 < 1) [L387] COND FALSE !(n < 1) VAL [length1=5, length2=2, n=3] [L390] COND FALSE !(length1 < n || length1 - n < length2) [L391] char* nondetString1 = (char*) __builtin_alloca(length1 * sizeof(char)); [L392] char* nondetString2 = (char*) __builtin_alloca(length2 * sizeof(char)); VAL [__builtin_alloca(length1 * sizeof(char))={6:0}, __builtin_alloca(length2 * sizeof(char))={4:0}, length1=5, length2=2, n=3, nondetString1={6:0}, nondetString2={4:0}] [L393] nondetString1[0] = '\0' VAL [__builtin_alloca(length1 * sizeof(char))={6:0}, __builtin_alloca(length2 * sizeof(char))={4:0}, length1=5, length2=2, n=3, nondetString1={6:0}, nondetString2={4:0}] [L394] nondetString2[0] = '\0' [L395] nondetString1 += length1 - n - 1 [L396] nondetString2 += length2 - 1 [L397] CALL cstrncat(nondetString1, nondetString2, n) [L366] char *s = s1; VAL [\old(n)=3, n=3, s={6:1}, s1={6:1}, s1={6:1}, s2={4:1}, s2={4:1}] [L367] EXPR \read(*s) VAL [\old(n)=3, \read(*s)=7, n=3, s={6:1}, s1={6:1}, s1={6:1}, s2={4:1}, s2={4:1}] [L367] COND TRUE *s != '\0' [L368] s-- VAL [\old(n)=3, n=3, s={6:0}, s1={6:1}, s1={6:1}, s2={4:1}, s2={4:1}] [L367] EXPR \read(*s) VAL [\old(n)=3, \read(*s)=0, n=3, s={6:0}, s1={6:1}, s1={6:1}, s2={4:1}, s2={4:1}] [L367] COND FALSE !(*s != '\0') [L369] n != 0 && (*s = *s2--) != '\0' [L369] EXPR s2-- VAL [\old(n)=3, n=3, n != 0 && (*s = *s2--) != '\0'=1, s={6:0}, s1={6:1}, s1={6:1}, s2={4:0}, s2={4:1}, s2--={4:1}s2--=8] [L369] EXPR *s = *s2-- [L369] n != 0 && (*s = *s2--) != '\0' VAL [\old(n)=3, n=3, n != 0 && (*s = *s2--) != '\0'=1, s={6:0}, s1={6:1}, s1={6:1}, s2={4:0}, s2={4:1}, s2--={4:1}s2--=8] [L369] COND TRUE n != 0 && (*s = *s2--) != '\0' [L370] n-- [L371] s-- VAL [\old(n)=3, n=2, s={6:-1}, s1={6:1}, s1={6:1}, s2={4:0}, s2={4:1}] [L369] n != 0 && (*s = *s2--) != '\0' [L369] EXPR s2-- VAL [\old(n)=3, n=2, n != 0 && (*s = *s2--) != '\0'=1, s={6:-1}, s1={6:1}, s1={6:1}, s2={4:1}, s2={4:-1}, s2--={4:0}s2--=0] [L369] *s = *s2-- - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 377]: Unable to prove that all allocated memory was freed Unable to prove that all allocated memory was freed Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 32 locations, 15 error locations. Started 1 CEGAR loops. OverallTime: 22.6s, OverallIterations: 16, TraceHistogramMax: 2, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 2.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 617 SdHoareTripleChecker+Valid, 1.2s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 617 mSDsluCounter, 707 SdHoareTripleChecker+Invalid, 1.0s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 465 mSDsCounter, 62 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 1097 IncrementalHoareTripleChecker+Invalid, 1159 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 62 mSolverCounterUnsat, 242 mSDtfsCounter, 1097 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 243 GetRequests, 77 SyntacticMatches, 4 SemanticMatches, 162 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1062 ImplicationChecksByTransitivity, 11.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=44occurred in iteration=15, InterpolantAutomatonStates: 95, 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, 15 MinimizatonAttempts, 92 StatesRemovedByMinimization, 8 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.4s SatisfiabilityAnalysisTime, 5.2s InterpolantComputationTime, 192 NumberOfCodeBlocks, 192 NumberOfCodeBlocksAsserted, 20 NumberOfCheckSat, 203 ConstructedInterpolants, 10 QuantifiedInterpolants, 2281 SizeOfPredicates, 67 NumberOfNonLiveVariables, 568 ConjunctsInSsa, 150 ConjunctsInUnsatCore, 23 InterpolantComputations, 11 PerfectInterpolantSequences, 4/33 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! [2022-11-25 23:36:09,010 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f37157a-f649-4666-b806-a2dac3550f3b/bin/utaipan-ByfvJB40ur/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE(valid-deref)