./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/list-simple/sll2c_insert_equal.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version e7bb482b 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_de17d194-ef21-4328-9a6c-031bf441d0e9/bin/utaipan-verify-FOvIYxoinp/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de17d194-ef21-4328-9a6c-031bf441d0e9/bin/utaipan-verify-FOvIYxoinp/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de17d194-ef21-4328-9a6c-031bf441d0e9/bin/utaipan-verify-FOvIYxoinp/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de17d194-ef21-4328-9a6c-031bf441d0e9/bin/utaipan-verify-FOvIYxoinp/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/list-simple/sll2c_insert_equal.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de17d194-ef21-4328-9a6c-031bf441d0e9/bin/utaipan-verify-FOvIYxoinp/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de17d194-ef21-4328-9a6c-031bf441d0e9/bin/utaipan-verify-FOvIYxoinp --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 8eaca07dd267d84d5b5f55ad6096951e873362e33b975be77e0f552bdb4e3bcb --- Real Ultimate output --- This is Ultimate 0.2.3-dev-e7bb482 [2023-11-06 20:30:28,910 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-06 20:30:29,054 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de17d194-ef21-4328-9a6c-031bf441d0e9/bin/utaipan-verify-FOvIYxoinp/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2023-11-06 20:30:29,066 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-06 20:30:29,067 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-06 20:30:29,118 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-06 20:30:29,119 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-06 20:30:29,120 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-06 20:30:29,122 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-06 20:30:29,128 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-06 20:30:29,129 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-06 20:30:29,131 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-06 20:30:29,132 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-06 20:30:29,134 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-06 20:30:29,135 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-06 20:30:29,137 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-06 20:30:29,138 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-06 20:30:29,138 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-06 20:30:29,139 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-06 20:30:29,140 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-06 20:30:29,140 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-06 20:30:29,141 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-06 20:30:29,142 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-06 20:30:29,143 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-06 20:30:29,144 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-06 20:30:29,145 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-06 20:30:29,145 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-06 20:30:29,146 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-06 20:30:29,147 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-06 20:30:29,147 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-11-06 20:30:29,149 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-11-06 20:30:29,150 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-11-06 20:30:29,150 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-06 20:30:29,150 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-06 20:30:29,151 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-06 20:30:29,151 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-06 20:30:29,152 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-06 20:30:29,152 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-06 20:30:29,153 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-06 20:30:29,153 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 20:30:29,154 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-06 20:30:29,154 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-06 20:30:29,155 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-06 20:30:29,155 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-06 20:30:29,156 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-06 20:30:29,156 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-06 20:30:29,157 INFO L153 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de17d194-ef21-4328-9a6c-031bf441d0e9/bin/utaipan-verify-FOvIYxoinp/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de17d194-ef21-4328-9a6c-031bf441d0e9/bin/utaipan-verify-FOvIYxoinp Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8eaca07dd267d84d5b5f55ad6096951e873362e33b975be77e0f552bdb4e3bcb [2023-11-06 20:30:29,584 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-06 20:30:29,620 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-06 20:30:29,623 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-06 20:30:29,625 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-06 20:30:29,627 INFO L274 PluginConnector]: CDTParser initialized [2023-11-06 20:30:29,629 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de17d194-ef21-4328-9a6c-031bf441d0e9/bin/utaipan-verify-FOvIYxoinp/../../sv-benchmarks/c/list-simple/sll2c_insert_equal.i [2023-11-06 20:30:33,030 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-06 20:30:33,366 INFO L384 CDTParser]: Found 1 translation units. [2023-11-06 20:30:33,367 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de17d194-ef21-4328-9a6c-031bf441d0e9/sv-benchmarks/c/list-simple/sll2c_insert_equal.i [2023-11-06 20:30:33,387 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de17d194-ef21-4328-9a6c-031bf441d0e9/bin/utaipan-verify-FOvIYxoinp/data/c5fab0a5c/d1c35f812c16480d90b9df906deb66da/FLAG17e67d72e [2023-11-06 20:30:33,410 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de17d194-ef21-4328-9a6c-031bf441d0e9/bin/utaipan-verify-FOvIYxoinp/data/c5fab0a5c/d1c35f812c16480d90b9df906deb66da [2023-11-06 20:30:33,413 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-06 20:30:33,415 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-06 20:30:33,416 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-06 20:30:33,417 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-06 20:30:33,428 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-06 20:30:33,429 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 08:30:33" (1/1) ... [2023-11-06 20:30:33,430 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@30c9c89d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 08:30:33, skipping insertion in model container [2023-11-06 20:30:33,430 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 08:30:33" (1/1) ... [2023-11-06 20:30:33,501 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-06 20:30:33,902 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 20:30:33,913 INFO L202 MainTranslator]: Completed pre-run [2023-11-06 20:30:33,963 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 20:30:34,002 INFO L206 MainTranslator]: Completed translation [2023-11-06 20:30:34,002 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 08:30:34 WrapperNode [2023-11-06 20:30:34,002 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-06 20:30:34,004 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-06 20:30:34,004 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-06 20:30:34,004 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-06 20:30:34,013 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 08:30:34" (1/1) ... [2023-11-06 20:30:34,030 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 08:30:34" (1/1) ... [2023-11-06 20:30:34,067 INFO L138 Inliner]: procedures = 127, calls = 44, calls flagged for inlining = 7, calls inlined = 7, statements flattened = 152 [2023-11-06 20:30:34,071 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-06 20:30:34,072 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-06 20:30:34,072 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-06 20:30:34,073 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-06 20:30:34,083 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 08:30:34" (1/1) ... [2023-11-06 20:30:34,089 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 08:30:34" (1/1) ... [2023-11-06 20:30:34,098 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 08:30:34" (1/1) ... [2023-11-06 20:30:34,101 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 08:30:34" (1/1) ... [2023-11-06 20:30:34,135 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 08:30:34" (1/1) ... [2023-11-06 20:30:34,140 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 08:30:34" (1/1) ... [2023-11-06 20:30:34,146 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 08:30:34" (1/1) ... [2023-11-06 20:30:34,161 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 08:30:34" (1/1) ... [2023-11-06 20:30:34,166 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-06 20:30:34,167 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-06 20:30:34,168 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-06 20:30:34,168 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-06 20:30:34,169 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 08:30:34" (1/1) ... [2023-11-06 20:30:34,183 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 20:30:34,199 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de17d194-ef21-4328-9a6c-031bf441d0e9/bin/utaipan-verify-FOvIYxoinp/z3 [2023-11-06 20:30:34,227 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de17d194-ef21-4328-9a6c-031bf441d0e9/bin/utaipan-verify-FOvIYxoinp/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-06 20:30:34,253 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de17d194-ef21-4328-9a6c-031bf441d0e9/bin/utaipan-verify-FOvIYxoinp/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-06 20:30:34,281 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-06 20:30:34,281 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-06 20:30:34,282 INFO L130 BoogieDeclarations]: Found specification of procedure node_create [2023-11-06 20:30:34,282 INFO L138 BoogieDeclarations]: Found implementation of procedure node_create [2023-11-06 20:30:34,282 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-06 20:30:34,282 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-06 20:30:34,282 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-06 20:30:34,283 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-11-06 20:30:34,285 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-11-06 20:30:34,285 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-06 20:30:34,286 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2023-11-06 20:30:34,286 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-06 20:30:34,286 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-06 20:30:34,286 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-06 20:30:34,475 INFO L236 CfgBuilder]: Building ICFG [2023-11-06 20:30:34,478 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-06 20:30:35,176 INFO L277 CfgBuilder]: Performing block encoding [2023-11-06 20:30:35,271 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-06 20:30:35,272 INFO L302 CfgBuilder]: Removed 4 assume(true) statements. [2023-11-06 20:30:35,277 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 08:30:35 BoogieIcfgContainer [2023-11-06 20:30:35,277 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-06 20:30:35,281 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-06 20:30:35,282 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-06 20:30:35,286 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-06 20:30:35,286 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 08:30:33" (1/3) ... [2023-11-06 20:30:35,288 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@52f3e06c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 08:30:35, skipping insertion in model container [2023-11-06 20:30:35,288 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 08:30:34" (2/3) ... [2023-11-06 20:30:35,291 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@52f3e06c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 08:30:35, skipping insertion in model container [2023-11-06 20:30:35,291 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 08:30:35" (3/3) ... [2023-11-06 20:30:35,293 INFO L112 eAbstractionObserver]: Analyzing ICFG sll2c_insert_equal.i [2023-11-06 20:30:35,318 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-06 20:30:35,319 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 52 error locations. [2023-11-06 20:30:35,387 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-06 20:30:35,396 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;@37674b9b, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-06 20:30:35,396 INFO L358 AbstractCegarLoop]: Starting to check reachability of 52 error locations. [2023-11-06 20:30:35,402 INFO L276 IsEmpty]: Start isEmpty. Operand has 108 states, 51 states have (on average 2.2549019607843137) internal successors, (115), 103 states have internal predecessors, (115), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-06 20:30:35,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2023-11-06 20:30:35,410 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 20:30:35,411 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2023-11-06 20:30:35,412 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting node_createErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2023-11-06 20:30:35,422 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 20:30:35,422 INFO L85 PathProgramCache]: Analyzing trace with hash 233449416, now seen corresponding path program 1 times [2023-11-06 20:30:35,434 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-06 20:30:35,434 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2062302685] [2023-11-06 20:30:35,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 20:30:35,435 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 20:30:35,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 20:30:35,702 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 20:30:35,703 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-06 20:30:35,704 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2062302685] [2023-11-06 20:30:35,704 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2062302685] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 20:30:35,705 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 20:30:35,705 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-06 20:30:35,707 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1739494343] [2023-11-06 20:30:35,708 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 20:30:35,712 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 20:30:35,713 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-06 20:30:35,744 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 20:30:35,744 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 20:30:35,747 INFO L87 Difference]: Start difference. First operand has 108 states, 51 states have (on average 2.2549019607843137) internal successors, (115), 103 states have internal predecessors, (115), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 20:30:35,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 20:30:35,897 INFO L93 Difference]: Finished difference Result 105 states and 115 transitions. [2023-11-06 20:30:35,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 20:30:35,900 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), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2023-11-06 20:30:35,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 20:30:35,909 INFO L225 Difference]: With dead ends: 105 [2023-11-06 20:30:35,909 INFO L226 Difference]: Without dead ends: 103 [2023-11-06 20:30:35,911 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 [2023-11-06 20:30:35,914 INFO L413 NwaCegarLoop]: 93 mSDtfsCounter, 6 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 146 SdHoareTripleChecker+Invalid, 77 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 76 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-06 20:30:35,916 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 146 Invalid, 77 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 76 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-06 20:30:35,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2023-11-06 20:30:35,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 103. [2023-11-06 20:30:35,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 49 states have (on average 2.163265306122449) internal successors, (106), 98 states have internal predecessors, (106), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-06 20:30:35,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 112 transitions. [2023-11-06 20:30:35,960 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 112 transitions. Word has length 5 [2023-11-06 20:30:35,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 20:30:35,961 INFO L495 AbstractCegarLoop]: Abstraction has 103 states and 112 transitions. [2023-11-06 20:30:35,961 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), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 20:30:35,962 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 112 transitions. [2023-11-06 20:30:35,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2023-11-06 20:30:35,962 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 20:30:35,962 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2023-11-06 20:30:35,963 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-06 20:30:35,963 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting node_createErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2023-11-06 20:30:35,964 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 20:30:35,964 INFO L85 PathProgramCache]: Analyzing trace with hash 233449417, now seen corresponding path program 1 times [2023-11-06 20:30:35,964 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-06 20:30:35,964 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [448221778] [2023-11-06 20:30:35,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 20:30:35,965 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 20:30:35,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 20:30:36,091 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 20:30:36,091 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-06 20:30:36,092 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [448221778] [2023-11-06 20:30:36,092 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [448221778] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 20:30:36,092 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 20:30:36,093 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-06 20:30:36,093 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [652005563] [2023-11-06 20:30:36,093 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 20:30:36,095 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 20:30:36,095 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-06 20:30:36,096 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 20:30:36,096 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 20:30:36,097 INFO L87 Difference]: Start difference. First operand 103 states and 112 transitions. Second operand has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 20:30:36,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 20:30:36,247 INFO L93 Difference]: Finished difference Result 101 states and 110 transitions. [2023-11-06 20:30:36,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 20:30:36,249 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), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2023-11-06 20:30:36,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 20:30:36,252 INFO L225 Difference]: With dead ends: 101 [2023-11-06 20:30:36,253 INFO L226 Difference]: Without dead ends: 101 [2023-11-06 20:30:36,257 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 [2023-11-06 20:30:36,264 INFO L413 NwaCegarLoop]: 92 mSDtfsCounter, 2 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 151 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-06 20:30:36,265 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 151 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-06 20:30:36,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2023-11-06 20:30:36,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 101. [2023-11-06 20:30:36,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 49 states have (on average 2.122448979591837) internal successors, (104), 96 states have internal predecessors, (104), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-06 20:30:36,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 110 transitions. [2023-11-06 20:30:36,276 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 110 transitions. Word has length 5 [2023-11-06 20:30:36,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 20:30:36,277 INFO L495 AbstractCegarLoop]: Abstraction has 101 states and 110 transitions. [2023-11-06 20:30:36,277 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), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 20:30:36,277 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 110 transitions. [2023-11-06 20:30:36,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-11-06 20:30:36,278 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 20:30:36,278 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 20:30:36,278 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-06 20:30:36,278 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2023-11-06 20:30:36,279 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 20:30:36,279 INFO L85 PathProgramCache]: Analyzing trace with hash 17800506, now seen corresponding path program 1 times [2023-11-06 20:30:36,279 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-06 20:30:36,280 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [894616737] [2023-11-06 20:30:36,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 20:30:36,280 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 20:30:36,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 20:30:36,563 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 20:30:36,563 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-06 20:30:36,564 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [894616737] [2023-11-06 20:30:36,564 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [894616737] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 20:30:36,564 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 20:30:36,564 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-06 20:30:36,565 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [137794207] [2023-11-06 20:30:36,565 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 20:30:36,565 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 20:30:36,566 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-06 20:30:36,566 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 20:30:36,567 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 20:30:36,568 INFO L87 Difference]: Start difference. First operand 101 states and 110 transitions. Second operand has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-06 20:30:36,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 20:30:36,635 INFO L93 Difference]: Finished difference Result 102 states and 111 transitions. [2023-11-06 20:30:36,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 20:30:36,636 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 10 [2023-11-06 20:30:36,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 20:30:36,642 INFO L225 Difference]: With dead ends: 102 [2023-11-06 20:30:36,643 INFO L226 Difference]: Without dead ends: 102 [2023-11-06 20:30:36,643 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 20:30:36,652 INFO L413 NwaCegarLoop]: 93 mSDtfsCounter, 4 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 180 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-06 20:30:36,657 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 180 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-06 20:30:36,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2023-11-06 20:30:36,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 102. [2023-11-06 20:30:36,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 50 states have (on average 2.1) internal successors, (105), 97 states have internal predecessors, (105), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-06 20:30:36,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 111 transitions. [2023-11-06 20:30:36,676 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 111 transitions. Word has length 10 [2023-11-06 20:30:36,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 20:30:36,677 INFO L495 AbstractCegarLoop]: Abstraction has 102 states and 111 transitions. [2023-11-06 20:30:36,678 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-06 20:30:36,678 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 111 transitions. [2023-11-06 20:30:36,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2023-11-06 20:30:36,679 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 20:30:36,679 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 20:30:36,679 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-06 20:30:36,680 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2023-11-06 20:30:36,681 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 20:30:36,681 INFO L85 PathProgramCache]: Analyzing trace with hash 1859873841, now seen corresponding path program 1 times [2023-11-06 20:30:36,682 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-06 20:30:36,682 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1124715078] [2023-11-06 20:30:36,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 20:30:36,682 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 20:30:36,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 20:30:36,906 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-06 20:30:36,906 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-06 20:30:36,906 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1124715078] [2023-11-06 20:30:36,906 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1124715078] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 20:30:36,907 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 20:30:36,907 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-06 20:30:36,907 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1971404340] [2023-11-06 20:30:36,907 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 20:30:36,908 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-06 20:30:36,908 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-06 20:30:36,909 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-06 20:30:36,910 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-06 20:30:36,911 INFO L87 Difference]: Start difference. First operand 102 states and 111 transitions. Second operand has 6 states, 4 states have (on average 2.75) internal successors, (11), 5 states have internal predecessors, (11), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-06 20:30:37,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 20:30:37,181 INFO L93 Difference]: Finished difference Result 101 states and 110 transitions. [2023-11-06 20:30:37,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-06 20:30:37,183 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 4 states have (on average 2.75) internal successors, (11), 5 states have internal predecessors, (11), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 17 [2023-11-06 20:30:37,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 20:30:37,184 INFO L225 Difference]: With dead ends: 101 [2023-11-06 20:30:37,185 INFO L226 Difference]: Without dead ends: 101 [2023-11-06 20:30:37,185 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-11-06 20:30:37,193 INFO L413 NwaCegarLoop]: 89 mSDtfsCounter, 3 mSDsluCounter, 204 mSDsCounter, 0 mSdLazyCounter, 244 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 293 SdHoareTripleChecker+Invalid, 245 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 244 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-06 20:30:37,194 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 293 Invalid, 245 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 244 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-06 20:30:37,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2023-11-06 20:30:37,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 101. [2023-11-06 20:30:37,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 50 states have (on average 2.08) internal successors, (104), 96 states have internal predecessors, (104), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-06 20:30:37,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 110 transitions. [2023-11-06 20:30:37,209 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 110 transitions. Word has length 17 [2023-11-06 20:30:37,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 20:30:37,210 INFO L495 AbstractCegarLoop]: Abstraction has 101 states and 110 transitions. [2023-11-06 20:30:37,210 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 4 states have (on average 2.75) internal successors, (11), 5 states have internal predecessors, (11), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-06 20:30:37,210 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 110 transitions. [2023-11-06 20:30:37,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2023-11-06 20:30:37,211 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 20:30:37,211 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 20:30:37,211 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-06 20:30:37,212 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2023-11-06 20:30:37,212 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 20:30:37,213 INFO L85 PathProgramCache]: Analyzing trace with hash 1859873842, now seen corresponding path program 1 times [2023-11-06 20:30:37,213 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-06 20:30:37,213 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1461847013] [2023-11-06 20:30:37,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 20:30:37,213 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 20:30:37,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 20:30:37,499 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 20:30:37,500 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-06 20:30:37,500 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1461847013] [2023-11-06 20:30:37,500 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1461847013] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 20:30:37,500 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 20:30:37,501 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-06 20:30:37,501 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [23726107] [2023-11-06 20:30:37,501 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 20:30:37,501 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-06 20:30:37,502 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-06 20:30:37,502 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-06 20:30:37,503 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-06 20:30:37,503 INFO L87 Difference]: Start difference. First operand 101 states and 110 transitions. Second operand has 6 states, 4 states have (on average 3.25) internal successors, (13), 5 states have internal predecessors, (13), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-06 20:30:37,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 20:30:37,719 INFO L93 Difference]: Finished difference Result 100 states and 109 transitions. [2023-11-06 20:30:37,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-06 20:30:37,720 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 4 states have (on average 3.25) internal successors, (13), 5 states have internal predecessors, (13), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 17 [2023-11-06 20:30:37,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 20:30:37,721 INFO L225 Difference]: With dead ends: 100 [2023-11-06 20:30:37,721 INFO L226 Difference]: Without dead ends: 100 [2023-11-06 20:30:37,722 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-11-06 20:30:37,723 INFO L413 NwaCegarLoop]: 89 mSDtfsCounter, 1 mSDsluCounter, 228 mSDsCounter, 0 mSdLazyCounter, 216 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 317 SdHoareTripleChecker+Invalid, 216 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 216 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-06 20:30:37,723 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 317 Invalid, 216 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 216 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-06 20:30:37,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2023-11-06 20:30:37,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 100. [2023-11-06 20:30:37,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 50 states have (on average 2.06) internal successors, (103), 95 states have internal predecessors, (103), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-06 20:30:37,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 109 transitions. [2023-11-06 20:30:37,730 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 109 transitions. Word has length 17 [2023-11-06 20:30:37,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 20:30:37,731 INFO L495 AbstractCegarLoop]: Abstraction has 100 states and 109 transitions. [2023-11-06 20:30:37,731 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 4 states have (on average 3.25) internal successors, (13), 5 states have internal predecessors, (13), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-06 20:30:37,731 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 109 transitions. [2023-11-06 20:30:37,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-11-06 20:30:37,732 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 20:30:37,732 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 20:30:37,732 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-06 20:30:37,733 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2023-11-06 20:30:37,733 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 20:30:37,733 INFO L85 PathProgramCache]: Analyzing trace with hash 632569201, now seen corresponding path program 1 times [2023-11-06 20:30:37,733 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-06 20:30:37,734 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [173055785] [2023-11-06 20:30:37,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 20:30:37,734 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 20:30:37,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 20:30:38,048 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 20:30:38,049 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-06 20:30:38,049 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [173055785] [2023-11-06 20:30:38,049 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [173055785] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 20:30:38,049 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [390709873] [2023-11-06 20:30:38,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 20:30:38,050 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 20:30:38,051 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de17d194-ef21-4328-9a6c-031bf441d0e9/bin/utaipan-verify-FOvIYxoinp/z3 [2023-11-06 20:30:38,055 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de17d194-ef21-4328-9a6c-031bf441d0e9/bin/utaipan-verify-FOvIYxoinp/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 20:30:38,067 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de17d194-ef21-4328-9a6c-031bf441d0e9/bin/utaipan-verify-FOvIYxoinp/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-06 20:30:38,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 20:30:38,210 INFO L262 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 23 conjunts are in the unsatisfiable core [2023-11-06 20:30:38,219 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 20:30:38,275 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-11-06 20:30:38,366 INFO L322 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2023-11-06 20:30:38,367 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 13 [2023-11-06 20:30:38,448 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 20:30:38,448 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 20:30:38,851 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 20:30:38,851 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [390709873] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 20:30:38,851 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [336664980] [2023-11-06 20:30:38,875 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2023-11-06 20:30:38,875 INFO L166 IcfgInterpreter]: Building call graph [2023-11-06 20:30:38,879 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-06 20:30:38,884 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-06 20:30:38,885 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-06 20:30:40,639 INFO L197 IcfgInterpreter]: Interpreting procedure node_create with input of size 59 for LOIs [2023-11-06 20:30:40,769 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-06 20:30:42,903 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1278#(and (not (= (select |#valid| |ULTIMATE.start_sll_circular_create_~last~0#1.base|) 1)) (<= 1 |#StackHeapBarrier|) (= |ULTIMATE.start_sll_circular_create_#in~data#1| 1) (= |ULTIMATE.start_sll_circular_create_~head~0#1.offset| 0) (= |ULTIMATE.start_sll_circular_create_~last~0#1.offset| 0) (<= |ULTIMATE.start_sll_circular_create_~len#1| 1) (= |ULTIMATE.start_main_~data~0#1| 1) (= |ULTIMATE.start_main_~#s~0#1.offset| 0) (= |ULTIMATE.start_main_~len~0#1| 2) (= 2 |ULTIMATE.start_sll_circular_create_#in~len#1|) (<= 2 |ULTIMATE.start_main_~#s~0#1.base|) (= |ULTIMATE.start_sll_circular_create_~data#1| 1))' at error location [2023-11-06 20:30:42,904 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-06 20:30:42,904 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 20:30:42,904 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 10] total 17 [2023-11-06 20:30:42,905 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1995726964] [2023-11-06 20:30:42,905 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 20:30:42,905 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-11-06 20:30:42,905 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-06 20:30:42,906 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-11-06 20:30:42,907 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=749, Unknown=0, NotChecked=0, Total=870 [2023-11-06 20:30:42,908 INFO L87 Difference]: Start difference. First operand 100 states and 109 transitions. Second operand has 18 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 2 states have call successors, (3), 3 states have call predecessors, (3), 4 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2023-11-06 20:30:43,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 20:30:43,396 INFO L93 Difference]: Finished difference Result 99 states and 108 transitions. [2023-11-06 20:30:43,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-06 20:30:43,396 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 2 states have call successors, (3), 3 states have call predecessors, (3), 4 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 19 [2023-11-06 20:30:43,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 20:30:43,397 INFO L225 Difference]: With dead ends: 99 [2023-11-06 20:30:43,397 INFO L226 Difference]: Without dead ends: 99 [2023-11-06 20:30:43,398 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 243 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=133, Invalid=797, Unknown=0, NotChecked=0, Total=930 [2023-11-06 20:30:43,399 INFO L413 NwaCegarLoop]: 85 mSDtfsCounter, 6 mSDsluCounter, 476 mSDsCounter, 0 mSdLazyCounter, 565 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 561 SdHoareTripleChecker+Invalid, 574 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 565 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-06 20:30:43,399 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 561 Invalid, 574 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 565 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-06 20:30:43,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2023-11-06 20:30:43,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 99. [2023-11-06 20:30:43,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 50 states have (on average 2.04) internal successors, (102), 94 states have internal predecessors, (102), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-06 20:30:43,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 108 transitions. [2023-11-06 20:30:43,407 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 108 transitions. Word has length 19 [2023-11-06 20:30:43,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 20:30:43,408 INFO L495 AbstractCegarLoop]: Abstraction has 99 states and 108 transitions. [2023-11-06 20:30:43,408 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 2 states have call successors, (3), 3 states have call predecessors, (3), 4 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2023-11-06 20:30:43,408 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 108 transitions. [2023-11-06 20:30:43,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-11-06 20:30:43,409 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 20:30:43,409 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 20:30:43,419 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de17d194-ef21-4328-9a6c-031bf441d0e9/bin/utaipan-verify-FOvIYxoinp/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-06 20:30:43,618 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de17d194-ef21-4328-9a6c-031bf441d0e9/bin/utaipan-verify-FOvIYxoinp/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-11-06 20:30:43,619 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2023-11-06 20:30:43,619 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 20:30:43,619 INFO L85 PathProgramCache]: Analyzing trace with hash 632569202, now seen corresponding path program 1 times [2023-11-06 20:30:43,620 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-06 20:30:43,620 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1694015190] [2023-11-06 20:30:43,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 20:30:43,620 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 20:30:43,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 20:30:43,992 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 20:30:43,992 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-06 20:30:43,993 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1694015190] [2023-11-06 20:30:43,993 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1694015190] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 20:30:43,993 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1411196068] [2023-11-06 20:30:43,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 20:30:43,993 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 20:30:43,993 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de17d194-ef21-4328-9a6c-031bf441d0e9/bin/utaipan-verify-FOvIYxoinp/z3 [2023-11-06 20:30:43,994 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de17d194-ef21-4328-9a6c-031bf441d0e9/bin/utaipan-verify-FOvIYxoinp/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 20:30:44,005 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de17d194-ef21-4328-9a6c-031bf441d0e9/bin/utaipan-verify-FOvIYxoinp/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-06 20:30:44,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 20:30:44,123 INFO L262 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 35 conjunts are in the unsatisfiable core [2023-11-06 20:30:44,126 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 20:30:44,134 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-11-06 20:30:44,379 INFO L322 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2023-11-06 20:30:44,379 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 15 [2023-11-06 20:30:44,399 INFO L322 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-11-06 20:30:44,399 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2023-11-06 20:30:44,481 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 20:30:44,482 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 20:30:44,714 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1411196068] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 20:30:44,715 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2084148003] [2023-11-06 20:30:44,717 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2023-11-06 20:30:44,718 INFO L166 IcfgInterpreter]: Building call graph [2023-11-06 20:30:44,718 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-06 20:30:44,718 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-06 20:30:44,718 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-06 20:30:45,772 INFO L197 IcfgInterpreter]: Interpreting procedure node_create with input of size 59 for LOIs [2023-11-06 20:30:45,894 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-06 20:30:48,326 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1579#(and (<= 1 |#StackHeapBarrier|) (= |ULTIMATE.start_sll_circular_create_#in~data#1| 1) (= |ULTIMATE.start_sll_circular_create_~head~0#1.offset| 0) (= |ULTIMATE.start_sll_circular_create_~last~0#1.offset| 0) (<= (select |#length| |ULTIMATE.start_sll_circular_create_~last~0#1.base|) 3) (<= |ULTIMATE.start_sll_circular_create_~len#1| 1) (= |ULTIMATE.start_main_~data~0#1| 1) (= |ULTIMATE.start_main_~#s~0#1.offset| 0) (= |ULTIMATE.start_main_~len~0#1| 2) (= 2 |ULTIMATE.start_sll_circular_create_#in~len#1|) (<= 2 |ULTIMATE.start_main_~#s~0#1.base|) (= |ULTIMATE.start_sll_circular_create_~data#1| 1))' at error location [2023-11-06 20:30:48,327 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-06 20:30:48,327 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 20:30:48,327 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 17 [2023-11-06 20:30:48,327 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1831132574] [2023-11-06 20:30:48,327 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 20:30:48,328 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-11-06 20:30:48,328 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-06 20:30:48,329 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-11-06 20:30:48,329 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=888, Unknown=0, NotChecked=0, Total=992 [2023-11-06 20:30:48,330 INFO L87 Difference]: Start difference. First operand 99 states and 108 transitions. Second operand has 18 states, 13 states have (on average 2.230769230769231) internal successors, (29), 13 states have internal predecessors, (29), 3 states have call successors, (3), 3 states have call predecessors, (3), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2023-11-06 20:30:49,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 20:30:49,306 INFO L93 Difference]: Finished difference Result 100 states and 110 transitions. [2023-11-06 20:30:49,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-06 20:30:49,307 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 13 states have (on average 2.230769230769231) internal successors, (29), 13 states have internal predecessors, (29), 3 states have call successors, (3), 3 states have call predecessors, (3), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) Word has length 19 [2023-11-06 20:30:49,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 20:30:49,308 INFO L225 Difference]: With dead ends: 100 [2023-11-06 20:30:49,308 INFO L226 Difference]: Without dead ends: 100 [2023-11-06 20:30:49,309 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 173 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=144, Invalid=1188, Unknown=0, NotChecked=0, Total=1332 [2023-11-06 20:30:49,310 INFO L413 NwaCegarLoop]: 84 mSDtfsCounter, 4 mSDsluCounter, 720 mSDsCounter, 0 mSdLazyCounter, 848 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 804 SdHoareTripleChecker+Invalid, 853 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 848 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-11-06 20:30:49,310 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 804 Invalid, 853 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 848 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-11-06 20:30:49,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2023-11-06 20:30:49,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 98. [2023-11-06 20:30:49,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 50 states have (on average 2.02) internal successors, (101), 93 states have internal predecessors, (101), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-06 20:30:49,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 107 transitions. [2023-11-06 20:30:49,318 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 107 transitions. Word has length 19 [2023-11-06 20:30:49,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 20:30:49,318 INFO L495 AbstractCegarLoop]: Abstraction has 98 states and 107 transitions. [2023-11-06 20:30:49,318 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 13 states have (on average 2.230769230769231) internal successors, (29), 13 states have internal predecessors, (29), 3 states have call successors, (3), 3 states have call predecessors, (3), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2023-11-06 20:30:49,318 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 107 transitions. [2023-11-06 20:30:49,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-11-06 20:30:49,319 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 20:30:49,320 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 20:30:49,335 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de17d194-ef21-4328-9a6c-031bf441d0e9/bin/utaipan-verify-FOvIYxoinp/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-06 20:30:49,526 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de17d194-ef21-4328-9a6c-031bf441d0e9/bin/utaipan-verify-FOvIYxoinp/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 20:30:49,527 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2023-11-06 20:30:49,527 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 20:30:49,527 INFO L85 PathProgramCache]: Analyzing trace with hash -18651199, now seen corresponding path program 1 times [2023-11-06 20:30:49,527 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-06 20:30:49,528 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1993418978] [2023-11-06 20:30:49,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 20:30:49,528 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 20:30:49,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 20:30:50,181 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-06 20:30:50,181 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-06 20:30:50,181 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1993418978] [2023-11-06 20:30:50,181 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1993418978] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 20:30:50,181 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1713844360] [2023-11-06 20:30:50,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 20:30:50,182 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 20:30:50,182 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de17d194-ef21-4328-9a6c-031bf441d0e9/bin/utaipan-verify-FOvIYxoinp/z3 [2023-11-06 20:30:50,184 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de17d194-ef21-4328-9a6c-031bf441d0e9/bin/utaipan-verify-FOvIYxoinp/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 20:30:50,219 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de17d194-ef21-4328-9a6c-031bf441d0e9/bin/utaipan-verify-FOvIYxoinp/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-06 20:30:50,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 20:30:50,353 INFO L262 TraceCheckSpWp]: Trace formula consists of 328 conjuncts, 31 conjunts are in the unsatisfiable core [2023-11-06 20:30:50,358 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 20:30:50,361 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-11-06 20:30:50,409 INFO L322 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2023-11-06 20:30:50,409 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 13 [2023-11-06 20:30:50,484 WARN L861 $PredicateComparison]: unable to prove that (exists ((|node_create_~temp~0#1.base| Int)) (= |c_#valid| (store |c_old(#valid)| |node_create_~temp~0#1.base| 1))) is different from true [2023-11-06 20:30:50,509 INFO L322 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2023-11-06 20:30:50,509 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 22 [2023-11-06 20:30:50,635 INFO L322 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2023-11-06 20:30:50,635 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 14 [2023-11-06 20:30:50,654 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 8 not checked. [2023-11-06 20:30:50,654 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 20:30:51,307 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 8 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-06 20:30:51,307 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1713844360] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 20:30:51,307 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2118991723] [2023-11-06 20:30:51,310 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2023-11-06 20:30:51,310 INFO L166 IcfgInterpreter]: Building call graph [2023-11-06 20:30:51,311 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-06 20:30:51,311 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-06 20:30:51,311 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-06 20:30:52,510 INFO L197 IcfgInterpreter]: Interpreting procedure node_create with input of size 6 for LOIs [2023-11-06 20:30:52,532 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-06 20:30:55,418 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1978#(and (= |ULTIMATE.start_sll_circular_insert_~snd_to_last~0#1.offset| 0) (<= 1 |#StackHeapBarrier|) (= |ULTIMATE.start_sll_circular_insert_~new_node~0#1.offset| 0) (= |ULTIMATE.start_sll_circular_insert_#in~head#1.offset| 0) (= |ULTIMATE.start_sll_circular_insert_#in~index#1| 1) (= |ULTIMATE.start_sll_circular_insert_~index#1| 1) (or (and (exists ((|v_#memory_$Pointer$.base_135| (Array Int (Array Int Int)))) (= |#memory_$Pointer$.base| (store |v_#memory_$Pointer$.base_135| |ULTIMATE.start_sll_circular_insert_~new_node~0#1.base| (store (store (select |v_#memory_$Pointer$.base_135| |ULTIMATE.start_sll_circular_insert_~new_node~0#1.base|) 0 0) 4 (select (select |#memory_$Pointer$.base| |ULTIMATE.start_sll_circular_insert_~new_node~0#1.base|) 4))))) (not (= |ULTIMATE.start_sll_circular_insert_~new_node~0#1.base| 0)) (<= (+ |ULTIMATE.start_sll_circular_insert_~new_node~0#1.base| 1) |#StackHeapBarrier|) (exists ((|v_#length_125| (Array Int Int))) (= |#length| (store |v_#length_125| |ULTIMATE.start_sll_circular_insert_~new_node~0#1.base| 8))) (= (select |#valid| |ULTIMATE.start_sll_circular_insert_~new_node~0#1.base|) 1) (exists ((|v_#memory_$Pointer$.offset_135| (Array Int (Array Int Int)))) (= |#memory_$Pointer$.offset| (store |v_#memory_$Pointer$.offset_135| |ULTIMATE.start_sll_circular_insert_~new_node~0#1.base| (store (store (select |v_#memory_$Pointer$.offset_135| |ULTIMATE.start_sll_circular_insert_~new_node~0#1.base|) 0 0) 4 (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_sll_circular_insert_~new_node~0#1.base|) 4))))) (= |ULTIMATE.start_sll_circular_insert_~head#1.base| |ULTIMATE.start_sll_circular_insert_#in~head#1.base|) (exists ((|v_#valid_155| (Array Int Int))) (and (= |#valid| (store |v_#valid_155| |ULTIMATE.start_sll_circular_insert_~new_node~0#1.base| 1)) (= 0 (select |v_#valid_155| |ULTIMATE.start_sll_circular_insert_~new_node~0#1.base|)))) (<= 8 (select |#length| |ULTIMATE.start_sll_circular_insert_~new_node~0#1.base|)) (exists ((|v_#memory_$Pointer$.offset_139| (Array Int (Array Int Int))) (|v_old(#valid)_AFTER_CALL_30| (Array Int Int)) (|v_#memory_int_115| (Array Int (Array Int Int))) (|v_#memory_$Pointer$.base_139| (Array Int (Array Int Int))) (|v_old(#length)_AFTER_CALL_30| (Array Int Int)) (|v_#memory_int_BEFORE_CALL_50| (Array Int (Array Int Int))) (|v_ULTIMATE.start_sll_circular_create_~last~0#1.base_18| Int)) (and (<= 4 (select |v_old(#length)_AFTER_CALL_30| |v_ULTIMATE.start_sll_circular_create_~last~0#1.base_18|)) (= (select (select (store |v_#memory_$Pointer$.base_139| |v_ULTIMATE.start_sll_circular_create_~last~0#1.base_18| (store (select |v_#memory_$Pointer$.base_139| |v_ULTIMATE.start_sll_circular_create_~last~0#1.base_18|) 0 |ULTIMATE.start_sll_circular_create_#res#1.base|)) |ULTIMATE.start_main_~#s~0#1.base|) 0) |ULTIMATE.start_sll_circular_create_#res#1.base|) (= (select (select (store |v_#memory_$Pointer$.offset_139| |v_ULTIMATE.start_sll_circular_create_~last~0#1.base_18| (store (select |v_#memory_$Pointer$.offset_139| |v_ULTIMATE.start_sll_circular_create_~last~0#1.base_18|) 0 0)) |ULTIMATE.start_main_~#s~0#1.base|) 0) 0) (= (select |v_old(#valid)_AFTER_CALL_30| |v_ULTIMATE.start_sll_circular_create_~last~0#1.base_18|) 1) (= (store |v_#memory_int_115| |v_ULTIMATE.start_sll_circular_create_~last~0#1.base_18| (store (select |v_#memory_int_115| |v_ULTIMATE.start_sll_circular_create_~last~0#1.base_18|) 0 (select (select |v_#memory_int_BEFORE_CALL_50| |v_ULTIMATE.start_sll_circular_create_~last~0#1.base_18|) 0))) |v_#memory_int_BEFORE_CALL_50|))) (exists ((|v_#memory_int_111| (Array Int (Array Int Int))) (|v_#memory_int_112| (Array Int (Array Int Int)))) (and (= |#memory_int| (store |v_#memory_int_112| |ULTIMATE.start_sll_circular_insert_~new_node~0#1.base| (store (select |v_#memory_int_112| |ULTIMATE.start_sll_circular_insert_~new_node~0#1.base|) 4 1))) (= (store |v_#memory_int_111| |ULTIMATE.start_sll_circular_insert_~new_node~0#1.base| (store (select |v_#memory_int_111| |ULTIMATE.start_sll_circular_insert_~new_node~0#1.base|) 0 (select (select |v_#memory_int_112| |ULTIMATE.start_sll_circular_insert_~new_node~0#1.base|) 0))) |v_#memory_int_112|))) (= |ULTIMATE.start_sll_circular_insert_#in~head#1.base| |ULTIMATE.start_main_~#s~0#1.base|)) (and (exists ((|v_#memory_$Pointer$.base_135| (Array Int (Array Int Int)))) (= |#memory_$Pointer$.base| (store |v_#memory_$Pointer$.base_135| |ULTIMATE.start_sll_circular_insert_~new_node~0#1.base| (store (store (select |v_#memory_$Pointer$.base_135| |ULTIMATE.start_sll_circular_insert_~new_node~0#1.base|) 0 0) 4 (select (select |#memory_$Pointer$.base| |ULTIMATE.start_sll_circular_insert_~new_node~0#1.base|) 4))))) (not (= |ULTIMATE.start_sll_circular_insert_~new_node~0#1.base| 0)) (<= (+ |ULTIMATE.start_sll_circular_insert_~new_node~0#1.base| 1) |#StackHeapBarrier|) (exists ((|v_#length_125| (Array Int Int))) (= |#length| (store |v_#length_125| |ULTIMATE.start_sll_circular_insert_~new_node~0#1.base| 8))) (= (select |#valid| |ULTIMATE.start_sll_circular_insert_~new_node~0#1.base|) 1) (exists ((|v_#memory_$Pointer$.offset_135| (Array Int (Array Int Int)))) (= |#memory_$Pointer$.offset| (store |v_#memory_$Pointer$.offset_135| |ULTIMATE.start_sll_circular_insert_~new_node~0#1.base| (store (store (select |v_#memory_$Pointer$.offset_135| |ULTIMATE.start_sll_circular_insert_~new_node~0#1.base|) 0 0) 4 (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_sll_circular_insert_~new_node~0#1.base|) 4))))) (= |ULTIMATE.start_sll_circular_insert_~head#1.base| |ULTIMATE.start_sll_circular_insert_#in~head#1.base|) (exists ((|v_#memory_$Pointer$.offset_139| (Array Int (Array Int Int))) (|v_old(#valid)_AFTER_CALL_31| (Array Int Int)) (|v_#memory_int_115| (Array Int (Array Int Int))) (|v_#memory_$Pointer$.base_139| (Array Int (Array Int Int))) (|v_#memory_int_BEFORE_CALL_52| (Array Int (Array Int Int))) (|v_#length_BEFORE_CALL_54| (Array Int Int)) (|v_ULTIMATE.start_sll_circular_create_~last~0#1.base_18| Int)) (and (= 1 (select |v_old(#valid)_AFTER_CALL_31| |v_ULTIMATE.start_sll_circular_create_~last~0#1.base_18|)) (= (select (select (store |v_#memory_$Pointer$.base_139| |v_ULTIMATE.start_sll_circular_create_~last~0#1.base_18| (store (select |v_#memory_$Pointer$.base_139| |v_ULTIMATE.start_sll_circular_create_~last~0#1.base_18|) 0 |ULTIMATE.start_sll_circular_create_#res#1.base|)) |ULTIMATE.start_main_~#s~0#1.base|) 0) |ULTIMATE.start_sll_circular_create_#res#1.base|) (<= 4 (select |v_#length_BEFORE_CALL_54| |v_ULTIMATE.start_sll_circular_create_~last~0#1.base_18|)) (= (select (select (store |v_#memory_$Pointer$.offset_139| |v_ULTIMATE.start_sll_circular_create_~last~0#1.base_18| (store (select |v_#memory_$Pointer$.offset_139| |v_ULTIMATE.start_sll_circular_create_~last~0#1.base_18|) 0 0)) |ULTIMATE.start_main_~#s~0#1.base|) 0) 0) (= (store |v_#memory_int_115| |v_ULTIMATE.start_sll_circular_create_~last~0#1.base_18| (store (select |v_#memory_int_115| |v_ULTIMATE.start_sll_circular_create_~last~0#1.base_18|) 0 (select (select |v_#memory_int_BEFORE_CALL_52| |v_ULTIMATE.start_sll_circular_create_~last~0#1.base_18|) 0))) |v_#memory_int_BEFORE_CALL_52|))) (exists ((|v_#valid_155| (Array Int Int))) (and (= |#valid| (store |v_#valid_155| |ULTIMATE.start_sll_circular_insert_~new_node~0#1.base| 1)) (= 0 (select |v_#valid_155| |ULTIMATE.start_sll_circular_insert_~new_node~0#1.base|)))) (<= 8 (select |#length| |ULTIMATE.start_sll_circular_insert_~new_node~0#1.base|)) (exists ((|v_#memory_int_111| (Array Int (Array Int Int))) (|v_#memory_int_112| (Array Int (Array Int Int)))) (and (= |#memory_int| (store |v_#memory_int_112| |ULTIMATE.start_sll_circular_insert_~new_node~0#1.base| (store (select |v_#memory_int_112| |ULTIMATE.start_sll_circular_insert_~new_node~0#1.base|) 4 1))) (= (store |v_#memory_int_111| |ULTIMATE.start_sll_circular_insert_~new_node~0#1.base| (store (select |v_#memory_int_111| |ULTIMATE.start_sll_circular_insert_~new_node~0#1.base|) 0 (select (select |v_#memory_int_112| |ULTIMATE.start_sll_circular_insert_~new_node~0#1.base|) 0))) |v_#memory_int_112|))) (= |ULTIMATE.start_sll_circular_insert_#in~head#1.base| |ULTIMATE.start_main_~#s~0#1.base|))) (= |ULTIMATE.start_sll_circular_create_#res#1.offset| 0) (= |ULTIMATE.start_sll_circular_insert_~snd_to_last~0#1.base| 0) (= |ULTIMATE.start_main_~data~0#1| 1) (= |ULTIMATE.start_sll_circular_insert_~head#1.offset| 0) (<= 2 |ULTIMATE.start_sll_circular_insert_#in~head#1.base|) (= |ULTIMATE.start_main_~#s~0#1.offset| 0) (= |ULTIMATE.start_main_~len~0#1| 2) (= 1 |ULTIMATE.start_sll_circular_insert_~data#1|) (<= 2 |ULTIMATE.start_sll_circular_insert_~head#1.base|) (= |ULTIMATE.start_sll_circular_insert_#in~data#1| 1) (not (= (select |#valid| |ULTIMATE.start_sll_circular_insert_~head#1.base|) 1)) (<= 2 |ULTIMATE.start_main_~#s~0#1.base|))' at error location [2023-11-06 20:30:55,418 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-06 20:30:55,418 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 20:30:55,418 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 9] total 21 [2023-11-06 20:30:55,419 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [554586225] [2023-11-06 20:30:55,419 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 20:30:55,419 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-11-06 20:30:55,419 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-06 20:30:55,420 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-11-06 20:30:55,421 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=1190, Unknown=5, NotChecked=70, Total=1406 [2023-11-06 20:30:55,421 INFO L87 Difference]: Start difference. First operand 98 states and 107 transitions. Second operand has 23 states, 17 states have (on average 2.9411764705882355) internal successors, (50), 20 states have internal predecessors, (50), 4 states have call successors, (8), 2 states have call predecessors, (8), 8 states have return successors, (9), 6 states have call predecessors, (9), 4 states have call successors, (9) [2023-11-06 20:30:56,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 20:30:56,062 INFO L93 Difference]: Finished difference Result 107 states and 117 transitions. [2023-11-06 20:30:56,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-06 20:30:56,062 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 17 states have (on average 2.9411764705882355) internal successors, (50), 20 states have internal predecessors, (50), 4 states have call successors, (8), 2 states have call predecessors, (8), 8 states have return successors, (9), 6 states have call predecessors, (9), 4 states have call successors, (9) Word has length 27 [2023-11-06 20:30:56,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 20:30:56,063 INFO L225 Difference]: With dead ends: 107 [2023-11-06 20:30:56,064 INFO L226 Difference]: Without dead ends: 107 [2023-11-06 20:30:56,065 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 50 SyntacticMatches, 8 SemanticMatches, 39 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 489 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=178, Invalid=1380, Unknown=6, NotChecked=76, Total=1640 [2023-11-06 20:30:56,065 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 119 mSDsluCounter, 347 mSDsCounter, 0 mSdLazyCounter, 617 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 119 SdHoareTripleChecker+Valid, 387 SdHoareTripleChecker+Invalid, 739 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 617 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 112 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-06 20:30:56,066 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [119 Valid, 387 Invalid, 739 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 617 Invalid, 0 Unknown, 112 Unchecked, 0.5s Time] [2023-11-06 20:30:56,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2023-11-06 20:30:56,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 90. [2023-11-06 20:30:56,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 50 states have (on average 1.86) internal successors, (93), 85 states have internal predecessors, (93), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-06 20:30:56,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 99 transitions. [2023-11-06 20:30:56,080 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 99 transitions. Word has length 27 [2023-11-06 20:30:56,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 20:30:56,081 INFO L495 AbstractCegarLoop]: Abstraction has 90 states and 99 transitions. [2023-11-06 20:30:56,081 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 17 states have (on average 2.9411764705882355) internal successors, (50), 20 states have internal predecessors, (50), 4 states have call successors, (8), 2 states have call predecessors, (8), 8 states have return successors, (9), 6 states have call predecessors, (9), 4 states have call successors, (9) [2023-11-06 20:30:56,081 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 99 transitions. [2023-11-06 20:30:56,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-11-06 20:30:56,082 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 20:30:56,083 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 20:30:56,096 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de17d194-ef21-4328-9a6c-031bf441d0e9/bin/utaipan-verify-FOvIYxoinp/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-06 20:30:56,289 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de17d194-ef21-4328-9a6c-031bf441d0e9/bin/utaipan-verify-FOvIYxoinp/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 20:30:56,289 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2023-11-06 20:30:56,290 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 20:30:56,290 INFO L85 PathProgramCache]: Analyzing trace with hash -18651198, now seen corresponding path program 1 times [2023-11-06 20:30:56,290 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-06 20:30:56,290 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [77064050] [2023-11-06 20:30:56,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 20:30:56,290 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 20:30:56,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 20:30:57,032 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 20:30:57,032 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-06 20:30:57,032 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [77064050] [2023-11-06 20:30:57,032 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [77064050] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 20:30:57,032 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [393933092] [2023-11-06 20:30:57,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 20:30:57,033 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 20:30:57,033 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de17d194-ef21-4328-9a6c-031bf441d0e9/bin/utaipan-verify-FOvIYxoinp/z3 [2023-11-06 20:30:57,039 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de17d194-ef21-4328-9a6c-031bf441d0e9/bin/utaipan-verify-FOvIYxoinp/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 20:30:57,063 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de17d194-ef21-4328-9a6c-031bf441d0e9/bin/utaipan-verify-FOvIYxoinp/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-06 20:30:57,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 20:30:57,205 INFO L262 TraceCheckSpWp]: Trace formula consists of 328 conjuncts, 26 conjunts are in the unsatisfiable core [2023-11-06 20:30:57,208 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 20:30:57,218 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-06 20:30:57,227 INFO L351 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 5 treesize of output 3 [2023-11-06 20:30:57,236 WARN L861 $PredicateComparison]: unable to prove that (exists ((|node_create_~temp~0#1.base| Int)) (and (<= (+ |node_create_~temp~0#1.base| 1) |c_#StackHeapBarrier|) (= (store |c_old(#length)| |node_create_~temp~0#1.base| (select |c_#length| |node_create_~temp~0#1.base|)) |c_#length|))) is different from true [2023-11-06 20:30:57,270 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 20:30:57,271 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2023-11-06 20:30:57,299 INFO L351 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 5 treesize of output 3 [2023-11-06 20:30:57,334 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 20:30:57,335 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2023-11-06 20:30:57,401 INFO L351 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 5 treesize of output 3 [2023-11-06 20:30:57,435 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 20:30:57,436 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2023-11-06 20:30:57,443 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-11-06 20:30:57,443 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 20:30:57,443 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [393933092] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 20:30:57,444 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-06 20:30:57,444 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [12] total 14 [2023-11-06 20:30:57,444 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1918748189] [2023-11-06 20:30:57,444 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 20:30:57,445 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-06 20:30:57,445 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-06 20:30:57,445 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-06 20:30:57,446 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=170, Unknown=1, NotChecked=26, Total=240 [2023-11-06 20:30:57,446 INFO L87 Difference]: Start difference. First operand 90 states and 99 transitions. Second operand has 7 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-11-06 20:30:57,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 20:30:57,621 INFO L93 Difference]: Finished difference Result 85 states and 94 transitions. [2023-11-06 20:30:57,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-06 20:30:57,621 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 27 [2023-11-06 20:30:57,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 20:30:57,622 INFO L225 Difference]: With dead ends: 85 [2023-11-06 20:30:57,622 INFO L226 Difference]: Without dead ends: 85 [2023-11-06 20:30:57,623 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=49, Invalid=194, Unknown=1, NotChecked=28, Total=272 [2023-11-06 20:30:57,623 INFO L413 NwaCegarLoop]: 59 mSDtfsCounter, 30 mSDsluCounter, 129 mSDsCounter, 0 mSdLazyCounter, 150 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 188 SdHoareTripleChecker+Invalid, 269 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 150 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 115 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-06 20:30:57,624 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 188 Invalid, 269 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 150 Invalid, 0 Unknown, 115 Unchecked, 0.1s Time] [2023-11-06 20:30:57,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2023-11-06 20:30:57,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 85. [2023-11-06 20:30:57,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 50 states have (on average 1.76) internal successors, (88), 80 states have internal predecessors, (88), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-06 20:30:57,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 94 transitions. [2023-11-06 20:30:57,628 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 94 transitions. Word has length 27 [2023-11-06 20:30:57,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 20:30:57,629 INFO L495 AbstractCegarLoop]: Abstraction has 85 states and 94 transitions. [2023-11-06 20:30:57,629 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-11-06 20:30:57,629 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 94 transitions. [2023-11-06 20:30:57,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2023-11-06 20:30:57,630 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 20:30:57,631 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 20:30:57,637 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de17d194-ef21-4328-9a6c-031bf441d0e9/bin/utaipan-verify-FOvIYxoinp/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-06 20:30:57,837 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de17d194-ef21-4328-9a6c-031bf441d0e9/bin/utaipan-verify-FOvIYxoinp/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2023-11-06 20:30:57,837 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2023-11-06 20:30:57,838 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 20:30:57,838 INFO L85 PathProgramCache]: Analyzing trace with hash -743752931, now seen corresponding path program 1 times [2023-11-06 20:30:57,838 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-06 20:30:57,838 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1760135069] [2023-11-06 20:30:57,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 20:30:57,838 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 20:30:57,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat