./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/heap-manipulation/merge_sort-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version cf1a7837 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_1f4415f5-109d-4842-a95f-f8a92e4fddac/bin/utaipan-verify-NcY6lQBIFX/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f4415f5-109d-4842-a95f-f8a92e4fddac/bin/utaipan-verify-NcY6lQBIFX/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f4415f5-109d-4842-a95f-f8a92e4fddac/bin/utaipan-verify-NcY6lQBIFX/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f4415f5-109d-4842-a95f-f8a92e4fddac/bin/utaipan-verify-NcY6lQBIFX/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/heap-manipulation/merge_sort-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f4415f5-109d-4842-a95f-f8a92e4fddac/bin/utaipan-verify-NcY6lQBIFX/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f4415f5-109d-4842-a95f-f8a92e4fddac/bin/utaipan-verify-NcY6lQBIFX --witnessprinter.witness.filename witness --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 e47f94c757882803b8e19e21a897c3f5ab1653c3391e3b246153a1c416bdab7c --- Real Ultimate output --- This is Ultimate 0.2.3-dev-cf1a783 [2023-11-12 01:02:19,759 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-12 01:02:19,876 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f4415f5-109d-4842-a95f-f8a92e4fddac/bin/utaipan-verify-NcY6lQBIFX/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2023-11-12 01:02:19,883 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-12 01:02:19,884 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-12 01:02:19,922 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-12 01:02:19,923 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-12 01:02:19,924 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-12 01:02:19,925 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-12 01:02:19,930 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-12 01:02:19,930 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-12 01:02:19,932 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-12 01:02:19,932 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-12 01:02:19,934 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-12 01:02:19,934 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-12 01:02:19,935 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-12 01:02:19,935 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-12 01:02:19,936 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-12 01:02:19,936 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-12 01:02:19,936 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-12 01:02:19,937 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-12 01:02:19,937 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-12 01:02:19,938 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-12 01:02:19,939 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-12 01:02:19,939 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-12 01:02:19,940 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-12 01:02:19,940 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-12 01:02:19,941 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-12 01:02:19,941 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-12 01:02:19,941 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-11-12 01:02:19,943 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-11-12 01:02:19,943 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-11-12 01:02:19,943 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-12 01:02:19,943 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-12 01:02:19,944 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-12 01:02:19,944 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-12 01:02:19,944 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-12 01:02:19,944 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-12 01:02:19,945 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-12 01:02:19,945 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-12 01:02:19,945 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-12 01:02:19,946 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-12 01:02:19,946 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-12 01:02:19,946 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-12 01:02:19,947 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-12 01:02:19,947 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-12 01:02:19,947 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_1f4415f5-109d-4842-a95f-f8a92e4fddac/bin/utaipan-verify-NcY6lQBIFX/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f4415f5-109d-4842-a95f-f8a92e4fddac/bin/utaipan-verify-NcY6lQBIFX Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e47f94c757882803b8e19e21a897c3f5ab1653c3391e3b246153a1c416bdab7c [2023-11-12 01:02:20,280 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-12 01:02:20,303 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-12 01:02:20,305 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-12 01:02:20,307 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-12 01:02:20,307 INFO L274 PluginConnector]: CDTParser initialized [2023-11-12 01:02:20,309 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f4415f5-109d-4842-a95f-f8a92e4fddac/bin/utaipan-verify-NcY6lQBIFX/../../sv-benchmarks/c/heap-manipulation/merge_sort-2.i [2023-11-12 01:02:23,514 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-12 01:02:23,856 INFO L384 CDTParser]: Found 1 translation units. [2023-11-12 01:02:23,863 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f4415f5-109d-4842-a95f-f8a92e4fddac/sv-benchmarks/c/heap-manipulation/merge_sort-2.i [2023-11-12 01:02:23,885 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f4415f5-109d-4842-a95f-f8a92e4fddac/bin/utaipan-verify-NcY6lQBIFX/data/fc6c223a8/a76cc2d7a7fb4de9960a1aa350f530db/FLAGdcf974114 [2023-11-12 01:02:23,899 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f4415f5-109d-4842-a95f-f8a92e4fddac/bin/utaipan-verify-NcY6lQBIFX/data/fc6c223a8/a76cc2d7a7fb4de9960a1aa350f530db [2023-11-12 01:02:23,902 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-12 01:02:23,903 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-12 01:02:23,905 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-12 01:02:23,905 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-12 01:02:23,912 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-12 01:02:23,912 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 01:02:23" (1/1) ... [2023-11-12 01:02:23,913 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2998eb0a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 01:02:23, skipping insertion in model container [2023-11-12 01:02:23,914 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 01:02:23" (1/1) ... [2023-11-12 01:02:23,976 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-12 01:02:24,347 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-12 01:02:24,361 INFO L202 MainTranslator]: Completed pre-run [2023-11-12 01:02:24,443 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-12 01:02:24,479 INFO L206 MainTranslator]: Completed translation [2023-11-12 01:02:24,480 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 01:02:24 WrapperNode [2023-11-12 01:02:24,480 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-12 01:02:24,482 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-12 01:02:24,483 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-12 01:02:24,483 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-12 01:02:24,492 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 01:02:24" (1/1) ... [2023-11-12 01:02:24,524 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 01:02:24" (1/1) ... [2023-11-12 01:02:24,582 INFO L138 Inliner]: procedures = 125, calls = 84, calls flagged for inlining = 7, calls inlined = 7, statements flattened = 304 [2023-11-12 01:02:24,586 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-12 01:02:24,589 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-12 01:02:24,589 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-12 01:02:24,590 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-12 01:02:24,604 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 01:02:24" (1/1) ... [2023-11-12 01:02:24,604 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 01:02:24" (1/1) ... [2023-11-12 01:02:24,615 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 01:02:24" (1/1) ... [2023-11-12 01:02:24,621 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 01:02:24" (1/1) ... [2023-11-12 01:02:24,641 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 01:02:24" (1/1) ... [2023-11-12 01:02:24,655 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 01:02:24" (1/1) ... [2023-11-12 01:02:24,658 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 01:02:24" (1/1) ... [2023-11-12 01:02:24,660 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 01:02:24" (1/1) ... [2023-11-12 01:02:24,673 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-12 01:02:24,674 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-12 01:02:24,674 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-12 01:02:24,675 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-12 01:02:24,676 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 01:02:24" (1/1) ... [2023-11-12 01:02:24,683 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-12 01:02:24,695 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f4415f5-109d-4842-a95f-f8a92e4fddac/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 01:02:24,724 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f4415f5-109d-4842-a95f-f8a92e4fddac/bin/utaipan-verify-NcY6lQBIFX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-12 01:02:24,762 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f4415f5-109d-4842-a95f-f8a92e4fddac/bin/utaipan-verify-NcY6lQBIFX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-12 01:02:24,781 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-12 01:02:24,781 INFO L130 BoogieDeclarations]: Found specification of procedure merge_single_node [2023-11-12 01:02:24,781 INFO L138 BoogieDeclarations]: Found implementation of procedure merge_single_node [2023-11-12 01:02:24,781 INFO L130 BoogieDeclarations]: Found specification of procedure fail [2023-11-12 01:02:24,782 INFO L138 BoogieDeclarations]: Found implementation of procedure fail [2023-11-12 01:02:24,782 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-12 01:02:24,782 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-12 01:02:24,782 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-12 01:02:24,784 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-12 01:02:24,784 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-11-12 01:02:24,785 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-11-12 01:02:24,785 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-12 01:02:24,785 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-12 01:02:24,786 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-12 01:02:24,786 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-12 01:02:24,967 INFO L236 CfgBuilder]: Building ICFG [2023-11-12 01:02:24,969 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-12 01:02:25,765 INFO L277 CfgBuilder]: Performing block encoding [2023-11-12 01:02:25,868 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-12 01:02:25,868 INFO L302 CfgBuilder]: Removed 33 assume(true) statements. [2023-11-12 01:02:25,872 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 01:02:25 BoogieIcfgContainer [2023-11-12 01:02:25,873 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-12 01:02:25,875 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-12 01:02:25,876 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-12 01:02:25,879 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-12 01:02:25,880 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.11 01:02:23" (1/3) ... [2023-11-12 01:02:25,881 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@410575b1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 01:02:25, skipping insertion in model container [2023-11-12 01:02:25,881 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 01:02:24" (2/3) ... [2023-11-12 01:02:25,883 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@410575b1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 01:02:25, skipping insertion in model container [2023-11-12 01:02:25,884 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 01:02:25" (3/3) ... [2023-11-12 01:02:25,887 INFO L112 eAbstractionObserver]: Analyzing ICFG merge_sort-2.i [2023-11-12 01:02:25,906 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-12 01:02:25,906 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 105 error locations. [2023-11-12 01:02:25,973 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-12 01:02:25,980 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;@4a0cb805, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-12 01:02:25,980 INFO L358 AbstractCegarLoop]: Starting to check reachability of 105 error locations. [2023-11-12 01:02:25,989 INFO L276 IsEmpty]: Start isEmpty. Operand has 233 states, 110 states have (on average 2.481818181818182) internal successors, (273), 230 states have internal predecessors, (273), 15 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (15), 14 states have call predecessors, (15), 15 states have call successors, (15) [2023-11-12 01:02:25,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2023-11-12 01:02:25,995 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 01:02:25,996 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2023-11-12 01:02:25,996 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [failErr0ASSERT_VIOLATIONMEMORY_LEAK, merge_single_nodeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, merge_single_nodeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 102 more)] === [2023-11-12 01:02:26,001 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 01:02:26,002 INFO L85 PathProgramCache]: Analyzing trace with hash 18591439, now seen corresponding path program 1 times [2023-11-12 01:02:26,010 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 01:02:26,010 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [57850721] [2023-11-12 01:02:26,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 01:02:26,011 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 01:02:26,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 01:02:26,225 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 01:02:26,226 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 01:02:26,226 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [57850721] [2023-11-12 01:02:26,227 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [57850721] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 01:02:26,227 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 01:02:26,227 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-12 01:02:26,229 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1596713818] [2023-11-12 01:02:26,230 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 01:02:26,234 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 01:02:26,234 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 01:02:26,263 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 01:02:26,263 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 01:02:26,266 INFO L87 Difference]: Start difference. First operand has 233 states, 110 states have (on average 2.481818181818182) internal successors, (273), 230 states have internal predecessors, (273), 15 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (15), 14 states have call predecessors, (15), 15 states have call successors, (15) Second operand has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 01:02:26,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 01:02:26,594 INFO L93 Difference]: Finished difference Result 229 states and 254 transitions. [2023-11-12 01:02:26,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 01:02:26,600 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2023-11-12 01:02:26,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 01:02:26,613 INFO L225 Difference]: With dead ends: 229 [2023-11-12 01:02:26,613 INFO L226 Difference]: Without dead ends: 228 [2023-11-12 01:02:26,615 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 [2023-11-12 01:02:26,619 INFO L413 NwaCegarLoop]: 218 mSDtfsCounter, 8 mSDsluCounter, 144 mSDsCounter, 0 mSdLazyCounter, 136 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 362 SdHoareTripleChecker+Invalid, 138 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 136 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-12 01:02:26,620 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 362 Invalid, 138 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 136 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-12 01:02:26,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2023-11-12 01:02:26,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 228. [2023-11-12 01:02:26,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 228 states, 109 states have (on average 2.165137614678899) internal successors, (236), 225 states have internal predecessors, (236), 15 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-12 01:02:26,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 228 states to 228 states and 253 transitions. [2023-11-12 01:02:26,675 INFO L78 Accepts]: Start accepts. Automaton has 228 states and 253 transitions. Word has length 4 [2023-11-12 01:02:26,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 01:02:26,676 INFO L495 AbstractCegarLoop]: Abstraction has 228 states and 253 transitions. [2023-11-12 01:02:26,676 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 01:02:26,676 INFO L276 IsEmpty]: Start isEmpty. Operand 228 states and 253 transitions. [2023-11-12 01:02:26,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2023-11-12 01:02:26,676 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 01:02:26,677 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2023-11-12 01:02:26,677 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-12 01:02:26,677 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [failErr0ASSERT_VIOLATIONMEMORY_LEAK, merge_single_nodeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, merge_single_nodeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 102 more)] === [2023-11-12 01:02:26,678 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 01:02:26,678 INFO L85 PathProgramCache]: Analyzing trace with hash 18591440, now seen corresponding path program 1 times [2023-11-12 01:02:26,678 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 01:02:26,679 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1792217305] [2023-11-12 01:02:26,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 01:02:26,679 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 01:02:26,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 01:02:26,794 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 01:02:26,794 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 01:02:26,795 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1792217305] [2023-11-12 01:02:26,795 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1792217305] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 01:02:26,795 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 01:02:26,796 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-12 01:02:26,796 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [338725436] [2023-11-12 01:02:26,796 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 01:02:26,797 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 01:02:26,798 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 01:02:26,798 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 01:02:26,799 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 01:02:26,799 INFO L87 Difference]: Start difference. First operand 228 states and 253 transitions. Second operand has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 01:02:27,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 01:02:27,024 INFO L93 Difference]: Finished difference Result 226 states and 251 transitions. [2023-11-12 01:02:27,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 01:02:27,027 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2023-11-12 01:02:27,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 01:02:27,029 INFO L225 Difference]: With dead ends: 226 [2023-11-12 01:02:27,029 INFO L226 Difference]: Without dead ends: 226 [2023-11-12 01:02:27,030 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 [2023-11-12 01:02:27,032 INFO L413 NwaCegarLoop]: 218 mSDtfsCounter, 6 mSDsluCounter, 151 mSDsCounter, 0 mSdLazyCounter, 125 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 369 SdHoareTripleChecker+Invalid, 127 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 125 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-12 01:02:27,032 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 369 Invalid, 127 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 125 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-12 01:02:27,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2023-11-12 01:02:27,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 226. [2023-11-12 01:02:27,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 226 states, 109 states have (on average 2.146788990825688) internal successors, (234), 223 states have internal predecessors, (234), 15 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-12 01:02:27,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 251 transitions. [2023-11-12 01:02:27,050 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 251 transitions. Word has length 4 [2023-11-12 01:02:27,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 01:02:27,050 INFO L495 AbstractCegarLoop]: Abstraction has 226 states and 251 transitions. [2023-11-12 01:02:27,051 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 01:02:27,051 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 251 transitions. [2023-11-12 01:02:27,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2023-11-12 01:02:27,051 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 01:02:27,052 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2023-11-12 01:02:27,052 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-12 01:02:27,052 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr89ASSERT_VIOLATIONMEMORY_LEAK === [failErr0ASSERT_VIOLATIONMEMORY_LEAK, merge_single_nodeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, merge_single_nodeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 102 more)] === [2023-11-12 01:02:27,053 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 01:02:27,053 INFO L85 PathProgramCache]: Analyzing trace with hash 575789128, now seen corresponding path program 1 times [2023-11-12 01:02:27,053 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 01:02:27,054 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [892940626] [2023-11-12 01:02:27,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 01:02:27,054 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 01:02:27,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 01:02:27,082 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 01:02:27,083 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 01:02:27,083 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [892940626] [2023-11-12 01:02:27,083 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [892940626] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 01:02:27,084 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 01:02:27,084 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-12 01:02:27,084 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [209960477] [2023-11-12 01:02:27,084 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 01:02:27,085 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 01:02:27,085 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 01:02:27,086 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 01:02:27,086 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 01:02:27,086 INFO L87 Difference]: Start difference. First operand 226 states and 251 transitions. Second operand has 3 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 01:02:27,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 01:02:27,357 INFO L93 Difference]: Finished difference Result 351 states and 395 transitions. [2023-11-12 01:02:27,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 01:02:27,358 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2023-11-12 01:02:27,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 01:02:27,363 INFO L225 Difference]: With dead ends: 351 [2023-11-12 01:02:27,363 INFO L226 Difference]: Without dead ends: 350 [2023-11-12 01:02:27,364 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 01:02:27,375 INFO L413 NwaCegarLoop]: 182 mSDtfsCounter, 125 mSDsluCounter, 133 mSDsCounter, 0 mSdLazyCounter, 186 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 125 SdHoareTripleChecker+Valid, 315 SdHoareTripleChecker+Invalid, 186 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 186 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-12 01:02:27,376 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [125 Valid, 315 Invalid, 186 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 186 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-12 01:02:27,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 350 states. [2023-11-12 01:02:27,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 350 to 229. [2023-11-12 01:02:27,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 229 states, 112 states have (on average 2.125) internal successors, (238), 226 states have internal predecessors, (238), 15 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-12 01:02:27,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 255 transitions. [2023-11-12 01:02:27,408 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 255 transitions. Word has length 5 [2023-11-12 01:02:27,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 01:02:27,408 INFO L495 AbstractCegarLoop]: Abstraction has 229 states and 255 transitions. [2023-11-12 01:02:27,409 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 01:02:27,409 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 255 transitions. [2023-11-12 01:02:27,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2023-11-12 01:02:27,410 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 01:02:27,410 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2023-11-12 01:02:27,410 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-12 01:02:27,411 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [failErr0ASSERT_VIOLATIONMEMORY_LEAK, merge_single_nodeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, merge_single_nodeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 102 more)] === [2023-11-12 01:02:27,412 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 01:02:27,412 INFO L85 PathProgramCache]: Analyzing trace with hash 687031293, now seen corresponding path program 1 times [2023-11-12 01:02:27,412 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 01:02:27,413 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [86965908] [2023-11-12 01:02:27,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 01:02:27,414 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 01:02:27,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 01:02:27,571 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 01:02:27,571 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 01:02:27,572 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [86965908] [2023-11-12 01:02:27,572 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [86965908] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 01:02:27,572 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 01:02:27,572 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-12 01:02:27,573 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [555255691] [2023-11-12 01:02:27,573 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 01:02:27,573 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 01:02:27,573 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 01:02:27,574 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 01:02:27,574 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 01:02:27,575 INFO L87 Difference]: Start difference. First operand 229 states and 255 transitions. Second operand has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 01:02:27,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 01:02:27,752 INFO L93 Difference]: Finished difference Result 227 states and 253 transitions. [2023-11-12 01:02:27,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 01:02:27,753 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2023-11-12 01:02:27,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 01:02:27,754 INFO L225 Difference]: With dead ends: 227 [2023-11-12 01:02:27,754 INFO L226 Difference]: Without dead ends: 227 [2023-11-12 01:02:27,755 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 [2023-11-12 01:02:27,766 INFO L413 NwaCegarLoop]: 216 mSDtfsCounter, 3 mSDsluCounter, 144 mSDsCounter, 0 mSdLazyCounter, 134 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 360 SdHoareTripleChecker+Invalid, 135 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 134 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-12 01:02:27,767 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 360 Invalid, 135 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 134 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-12 01:02:27,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2023-11-12 01:02:27,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 227. [2023-11-12 01:02:27,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 227 states, 112 states have (on average 2.107142857142857) internal successors, (236), 224 states have internal predecessors, (236), 15 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-12 01:02:27,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 253 transitions. [2023-11-12 01:02:27,788 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 253 transitions. Word has length 6 [2023-11-12 01:02:27,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 01:02:27,789 INFO L495 AbstractCegarLoop]: Abstraction has 227 states and 253 transitions. [2023-11-12 01:02:27,789 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 01:02:27,789 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 253 transitions. [2023-11-12 01:02:27,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2023-11-12 01:02:27,789 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 01:02:27,789 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2023-11-12 01:02:27,790 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-12 01:02:27,790 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [failErr0ASSERT_VIOLATIONMEMORY_LEAK, merge_single_nodeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, merge_single_nodeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 102 more)] === [2023-11-12 01:02:27,790 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 01:02:27,790 INFO L85 PathProgramCache]: Analyzing trace with hash 687031294, now seen corresponding path program 1 times [2023-11-12 01:02:27,791 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 01:02:27,791 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [863231799] [2023-11-12 01:02:27,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 01:02:27,791 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 01:02:27,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 01:02:27,915 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 01:02:27,915 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 01:02:27,915 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [863231799] [2023-11-12 01:02:27,915 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [863231799] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 01:02:27,916 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 01:02:27,916 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-12 01:02:27,916 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1074276347] [2023-11-12 01:02:27,916 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 01:02:27,916 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 01:02:27,917 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 01:02:27,917 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 01:02:27,917 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 01:02:27,917 INFO L87 Difference]: Start difference. First operand 227 states and 253 transitions. Second operand has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 01:02:28,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 01:02:28,089 INFO L93 Difference]: Finished difference Result 225 states and 251 transitions. [2023-11-12 01:02:28,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 01:02:28,089 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2023-11-12 01:02:28,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 01:02:28,091 INFO L225 Difference]: With dead ends: 225 [2023-11-12 01:02:28,091 INFO L226 Difference]: Without dead ends: 225 [2023-11-12 01:02:28,091 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 [2023-11-12 01:02:28,092 INFO L413 NwaCegarLoop]: 216 mSDtfsCounter, 1 mSDsluCounter, 151 mSDsCounter, 0 mSdLazyCounter, 125 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 367 SdHoareTripleChecker+Invalid, 126 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 125 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-12 01:02:28,093 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 367 Invalid, 126 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 125 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-12 01:02:28,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2023-11-12 01:02:28,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 225. [2023-11-12 01:02:28,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 225 states, 112 states have (on average 2.0892857142857144) internal successors, (234), 222 states have internal predecessors, (234), 15 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-12 01:02:28,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225 states to 225 states and 251 transitions. [2023-11-12 01:02:28,102 INFO L78 Accepts]: Start accepts. Automaton has 225 states and 251 transitions. Word has length 6 [2023-11-12 01:02:28,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 01:02:28,102 INFO L495 AbstractCegarLoop]: Abstraction has 225 states and 251 transitions. [2023-11-12 01:02:28,102 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 01:02:28,103 INFO L276 IsEmpty]: Start isEmpty. Operand 225 states and 251 transitions. [2023-11-12 01:02:28,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2023-11-12 01:02:28,103 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 01:02:28,103 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-11-12 01:02:28,103 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-12 01:02:28,104 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [failErr0ASSERT_VIOLATIONMEMORY_LEAK, merge_single_nodeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, merge_single_nodeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 102 more)] === [2023-11-12 01:02:28,104 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 01:02:28,104 INFO L85 PathProgramCache]: Analyzing trace with hash -717808542, now seen corresponding path program 1 times [2023-11-12 01:02:28,105 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 01:02:28,105 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1833408902] [2023-11-12 01:02:28,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 01:02:28,105 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 01:02:28,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 01:02:28,136 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 01:02:28,136 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 01:02:28,136 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1833408902] [2023-11-12 01:02:28,136 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1833408902] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 01:02:28,136 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 01:02:28,136 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-12 01:02:28,137 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1072089251] [2023-11-12 01:02:28,137 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 01:02:28,137 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 01:02:28,137 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 01:02:28,138 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 01:02:28,138 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 01:02:28,138 INFO L87 Difference]: Start difference. First operand 225 states and 251 transitions. Second operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 01:02:28,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 01:02:28,226 INFO L93 Difference]: Finished difference Result 231 states and 255 transitions. [2023-11-12 01:02:28,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 01:02:28,227 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2023-11-12 01:02:28,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 01:02:28,228 INFO L225 Difference]: With dead ends: 231 [2023-11-12 01:02:28,228 INFO L226 Difference]: Without dead ends: 230 [2023-11-12 01:02:28,229 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 [2023-11-12 01:02:28,230 INFO L413 NwaCegarLoop]: 217 mSDtfsCounter, 5 mSDsluCounter, 202 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 419 SdHoareTripleChecker+Invalid, 74 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-12 01:02:28,230 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 419 Invalid, 74 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-12 01:02:28,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2023-11-12 01:02:28,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 224. [2023-11-12 01:02:28,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 224 states, 111 states have (on average 2.09009009009009) internal successors, (232), 221 states have internal predecessors, (232), 15 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-12 01:02:28,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 249 transitions. [2023-11-12 01:02:28,239 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 249 transitions. Word has length 7 [2023-11-12 01:02:28,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 01:02:28,239 INFO L495 AbstractCegarLoop]: Abstraction has 224 states and 249 transitions. [2023-11-12 01:02:28,239 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 01:02:28,239 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 249 transitions. [2023-11-12 01:02:28,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-11-12 01:02:28,240 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 01:02:28,240 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 01:02:28,240 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-12 01:02:28,240 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr89ASSERT_VIOLATIONMEMORY_LEAK === [failErr0ASSERT_VIOLATIONMEMORY_LEAK, merge_single_nodeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, merge_single_nodeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 102 more)] === [2023-11-12 01:02:28,241 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 01:02:28,241 INFO L85 PathProgramCache]: Analyzing trace with hash -1692249795, now seen corresponding path program 1 times [2023-11-12 01:02:28,241 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 01:02:28,241 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1774039479] [2023-11-12 01:02:28,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 01:02:28,242 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 01:02:28,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 01:02:28,312 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 01:02:28,312 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 01:02:28,312 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1774039479] [2023-11-12 01:02:28,313 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1774039479] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 01:02:28,313 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 01:02:28,313 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-12 01:02:28,313 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [71063067] [2023-11-12 01:02:28,313 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 01:02:28,314 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-12 01:02:28,314 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 01:02:28,314 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-12 01:02:28,314 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-12 01:02:28,315 INFO L87 Difference]: Start difference. First operand 224 states and 249 transitions. Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 01:02:28,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 01:02:28,507 INFO L93 Difference]: Finished difference Result 355 states and 395 transitions. [2023-11-12 01:02:28,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-12 01:02:28,508 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2023-11-12 01:02:28,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 01:02:28,510 INFO L225 Difference]: With dead ends: 355 [2023-11-12 01:02:28,510 INFO L226 Difference]: Without dead ends: 355 [2023-11-12 01:02:28,511 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-12 01:02:28,511 INFO L413 NwaCegarLoop]: 204 mSDtfsCounter, 199 mSDsluCounter, 347 mSDsCounter, 0 mSdLazyCounter, 131 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 201 SdHoareTripleChecker+Valid, 551 SdHoareTripleChecker+Invalid, 132 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 131 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-12 01:02:28,512 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [201 Valid, 551 Invalid, 132 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 131 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-12 01:02:28,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 355 states. [2023-11-12 01:02:28,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 355 to 224. [2023-11-12 01:02:28,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 224 states, 111 states have (on average 2.081081081081081) internal successors, (231), 221 states have internal predecessors, (231), 15 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-12 01:02:28,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 248 transitions. [2023-11-12 01:02:28,524 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 248 transitions. Word has length 11 [2023-11-12 01:02:28,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 01:02:28,524 INFO L495 AbstractCegarLoop]: Abstraction has 224 states and 248 transitions. [2023-11-12 01:02:28,525 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 01:02:28,525 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 248 transitions. [2023-11-12 01:02:28,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2023-11-12 01:02:28,525 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 01:02:28,526 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 01:02:28,526 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-12 01:02:28,526 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [failErr0ASSERT_VIOLATIONMEMORY_LEAK, merge_single_nodeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, merge_single_nodeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 102 more)] === [2023-11-12 01:02:28,527 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 01:02:28,527 INFO L85 PathProgramCache]: Analyzing trace with hash 1540172823, now seen corresponding path program 1 times [2023-11-12 01:02:28,527 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 01:02:28,527 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [752912492] [2023-11-12 01:02:28,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 01:02:28,527 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 01:02:28,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 01:02:28,650 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 01:02:28,650 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 01:02:28,650 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [752912492] [2023-11-12 01:02:28,650 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [752912492] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 01:02:28,651 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 01:02:28,651 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-12 01:02:28,651 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [727246216] [2023-11-12 01:02:28,651 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 01:02:28,651 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-12 01:02:28,651 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 01:02:28,652 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-12 01:02:28,652 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-12 01:02:28,652 INFO L87 Difference]: Start difference. First operand 224 states and 248 transitions. Second operand has 5 states, 4 states have (on average 3.25) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 01:02:29,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 01:02:29,074 INFO L93 Difference]: Finished difference Result 280 states and 313 transitions. [2023-11-12 01:02:29,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-12 01:02:29,075 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.25) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2023-11-12 01:02:29,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 01:02:29,077 INFO L225 Difference]: With dead ends: 280 [2023-11-12 01:02:29,078 INFO L226 Difference]: Without dead ends: 280 [2023-11-12 01:02:29,078 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-11-12 01:02:29,079 INFO L413 NwaCegarLoop]: 142 mSDtfsCounter, 208 mSDsluCounter, 241 mSDsCounter, 0 mSdLazyCounter, 429 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 210 SdHoareTripleChecker+Valid, 383 SdHoareTripleChecker+Invalid, 447 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 429 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-12 01:02:29,079 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [210 Valid, 383 Invalid, 447 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 429 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-12 01:02:29,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 280 states. [2023-11-12 01:02:29,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 280 to 217. [2023-11-12 01:02:29,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 217 states, 113 states have (on average 2.0) internal successors, (226), 214 states have internal predecessors, (226), 15 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-12 01:02:29,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 243 transitions. [2023-11-12 01:02:29,088 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 243 transitions. Word has length 13 [2023-11-12 01:02:29,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 01:02:29,089 INFO L495 AbstractCegarLoop]: Abstraction has 217 states and 243 transitions. [2023-11-12 01:02:29,089 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.25) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 01:02:29,089 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 243 transitions. [2023-11-12 01:02:29,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2023-11-12 01:02:29,090 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 01:02:29,090 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 01:02:29,090 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-12 01:02:29,090 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [failErr0ASSERT_VIOLATIONMEMORY_LEAK, merge_single_nodeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, merge_single_nodeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 102 more)] === [2023-11-12 01:02:29,091 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 01:02:29,091 INFO L85 PathProgramCache]: Analyzing trace with hash 1540172824, now seen corresponding path program 1 times [2023-11-12 01:02:29,091 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 01:02:29,091 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [26782081] [2023-11-12 01:02:29,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 01:02:29,092 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 01:02:29,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 01:02:29,286 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 01:02:29,286 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 01:02:29,286 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [26782081] [2023-11-12 01:02:29,286 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [26782081] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 01:02:29,286 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 01:02:29,286 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-12 01:02:29,287 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [10411491] [2023-11-12 01:02:29,287 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 01:02:29,287 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-12 01:02:29,287 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 01:02:29,288 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-12 01:02:29,288 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-12 01:02:29,288 INFO L87 Difference]: Start difference. First operand 217 states and 243 transitions. Second operand has 5 states, 4 states have (on average 3.25) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 01:02:29,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 01:02:29,740 INFO L93 Difference]: Finished difference Result 327 states and 368 transitions. [2023-11-12 01:02:29,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-12 01:02:29,741 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.25) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2023-11-12 01:02:29,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 01:02:29,743 INFO L225 Difference]: With dead ends: 327 [2023-11-12 01:02:29,743 INFO L226 Difference]: Without dead ends: 327 [2023-11-12 01:02:29,744 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-11-12 01:02:29,745 INFO L413 NwaCegarLoop]: 158 mSDtfsCounter, 207 mSDsluCounter, 314 mSDsCounter, 0 mSdLazyCounter, 430 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 207 SdHoareTripleChecker+Valid, 472 SdHoareTripleChecker+Invalid, 442 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 430 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-12 01:02:29,745 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [207 Valid, 472 Invalid, 442 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 430 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-12 01:02:29,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 327 states. [2023-11-12 01:02:29,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 327 to 261. [2023-11-12 01:02:29,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 261 states, 157 states have (on average 1.8853503184713376) internal successors, (296), 258 states have internal predecessors, (296), 15 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-12 01:02:29,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 261 states to 261 states and 313 transitions. [2023-11-12 01:02:29,754 INFO L78 Accepts]: Start accepts. Automaton has 261 states and 313 transitions. Word has length 13 [2023-11-12 01:02:29,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 01:02:29,755 INFO L495 AbstractCegarLoop]: Abstraction has 261 states and 313 transitions. [2023-11-12 01:02:29,755 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.25) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 01:02:29,755 INFO L276 IsEmpty]: Start isEmpty. Operand 261 states and 313 transitions. [2023-11-12 01:02:29,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2023-11-12 01:02:29,756 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 01:02:29,756 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 01:02:29,756 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-11-12 01:02:29,757 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting failErr0ASSERT_VIOLATIONMEMORY_LEAK === [failErr0ASSERT_VIOLATIONMEMORY_LEAK, merge_single_nodeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, merge_single_nodeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 102 more)] === [2023-11-12 01:02:29,757 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 01:02:29,757 INFO L85 PathProgramCache]: Analyzing trace with hash -1646831455, now seen corresponding path program 1 times [2023-11-12 01:02:29,757 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 01:02:29,758 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [392944382] [2023-11-12 01:02:29,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 01:02:29,758 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 01:02:29,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 01:02:29,849 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 01:02:29,849 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 01:02:29,849 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [392944382] [2023-11-12 01:02:29,849 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [392944382] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 01:02:29,849 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 01:02:29,850 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-12 01:02:29,850 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1958657224] [2023-11-12 01:02:29,850 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 01:02:29,850 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-12 01:02:29,851 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 01:02:29,851 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-12 01:02:29,851 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-12 01:02:29,852 INFO L87 Difference]: Start difference. First operand 261 states and 313 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 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) [2023-11-12 01:02:30,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 01:02:30,093 INFO L93 Difference]: Finished difference Result 378 states and 423 transitions. [2023-11-12 01:02:30,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-12 01:02:30,094 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 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 15 [2023-11-12 01:02:30,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 01:02:30,096 INFO L225 Difference]: With dead ends: 378 [2023-11-12 01:02:30,096 INFO L226 Difference]: Without dead ends: 378 [2023-11-12 01:02:30,097 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-11-12 01:02:30,098 INFO L413 NwaCegarLoop]: 188 mSDtfsCounter, 263 mSDsluCounter, 505 mSDsCounter, 0 mSdLazyCounter, 203 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 265 SdHoareTripleChecker+Valid, 693 SdHoareTripleChecker+Invalid, 205 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 203 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-12 01:02:30,099 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [265 Valid, 693 Invalid, 205 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 203 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-12 01:02:30,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 378 states. [2023-11-12 01:02:30,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 378 to 260. [2023-11-12 01:02:30,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 260 states, 157 states have (on average 1.8662420382165605) internal successors, (293), 257 states have internal predecessors, (293), 14 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-12 01:02:30,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 260 states to 260 states and 309 transitions. [2023-11-12 01:02:30,110 INFO L78 Accepts]: Start accepts. Automaton has 260 states and 309 transitions. Word has length 15 [2023-11-12 01:02:30,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 01:02:30,110 INFO L495 AbstractCegarLoop]: Abstraction has 260 states and 309 transitions. [2023-11-12 01:02:30,111 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 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) [2023-11-12 01:02:30,111 INFO L276 IsEmpty]: Start isEmpty. Operand 260 states and 309 transitions. [2023-11-12 01:02:30,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2023-11-12 01:02:30,111 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 01:02:30,112 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 01:02:30,112 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-11-12 01:02:30,114 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting failErr0ASSERT_VIOLATIONMEMORY_LEAK === [failErr0ASSERT_VIOLATIONMEMORY_LEAK, merge_single_nodeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, merge_single_nodeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 102 more)] === [2023-11-12 01:02:30,115 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 01:02:30,115 INFO L85 PathProgramCache]: Analyzing trace with hash -106089943, now seen corresponding path program 1 times [2023-11-12 01:02:30,115 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 01:02:30,115 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [567383119] [2023-11-12 01:02:30,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 01:02:30,115 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 01:02:30,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 01:02:30,253 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-12 01:02:30,253 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 01:02:30,254 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [567383119] [2023-11-12 01:02:30,254 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [567383119] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 01:02:30,254 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 01:02:30,254 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-12 01:02:30,254 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1219683029] [2023-11-12 01:02:30,254 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 01:02:30,255 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-12 01:02:30,255 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 01:02:30,255 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-12 01:02:30,256 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-12 01:02:30,256 INFO L87 Difference]: Start difference. First operand 260 states and 309 transitions. Second operand has 5 states, 5 states have (on average 4.0) internal successors, (20), 5 states have internal predecessors, (20), 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) [2023-11-12 01:02:30,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 01:02:30,489 INFO L93 Difference]: Finished difference Result 259 states and 306 transitions. [2023-11-12 01:02:30,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-12 01:02:30,489 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 5 states have internal predecessors, (20), 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 22 [2023-11-12 01:02:30,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 01:02:30,491 INFO L225 Difference]: With dead ends: 259 [2023-11-12 01:02:30,491 INFO L226 Difference]: Without dead ends: 259 [2023-11-12 01:02:30,491 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-12 01:02:30,492 INFO L413 NwaCegarLoop]: 191 mSDtfsCounter, 18 mSDsluCounter, 497 mSDsCounter, 0 mSdLazyCounter, 221 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 688 SdHoareTripleChecker+Invalid, 221 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 221 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-12 01:02:30,492 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 688 Invalid, 221 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 221 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-12 01:02:30,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 259 states. [2023-11-12 01:02:30,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 259 to 259. [2023-11-12 01:02:30,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 259 states, 157 states have (on average 1.8535031847133758) internal successors, (291), 256 states have internal predecessors, (291), 13 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-12 01:02:30,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 259 states to 259 states and 306 transitions. [2023-11-12 01:02:30,501 INFO L78 Accepts]: Start accepts. Automaton has 259 states and 306 transitions. Word has length 22 [2023-11-12 01:02:30,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 01:02:30,501 INFO L495 AbstractCegarLoop]: Abstraction has 259 states and 306 transitions. [2023-11-12 01:02:30,502 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 5 states have internal predecessors, (20), 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) [2023-11-12 01:02:30,502 INFO L276 IsEmpty]: Start isEmpty. Operand 259 states and 306 transitions. [2023-11-12 01:02:30,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2023-11-12 01:02:30,504 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 01:02:30,504 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 01:02:30,504 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-11-12 01:02:30,504 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting failErr0ASSERT_VIOLATIONMEMORY_LEAK === [failErr0ASSERT_VIOLATIONMEMORY_LEAK, merge_single_nodeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, merge_single_nodeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 102 more)] === [2023-11-12 01:02:30,505 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 01:02:30,505 INFO L85 PathProgramCache]: Analyzing trace with hash -1151872909, now seen corresponding path program 1 times [2023-11-12 01:02:30,505 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 01:02:30,505 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [175965525] [2023-11-12 01:02:30,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 01:02:30,505 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 01:02:30,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 01:02:30,634 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-12 01:02:30,635 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 01:02:30,635 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [175965525] [2023-11-12 01:02:30,635 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [175965525] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 01:02:30,635 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 01:02:30,636 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-12 01:02:30,636 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1896270164] [2023-11-12 01:02:30,636 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 01:02:30,636 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-12 01:02:30,637 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 01:02:30,638 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-12 01:02:30,638 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-12 01:02:30,638 INFO L87 Difference]: Start difference. First operand 259 states and 306 transitions. Second operand has 5 states, 5 states have (on average 4.0) internal successors, (20), 5 states have internal predecessors, (20), 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) [2023-11-12 01:02:30,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 01:02:30,880 INFO L93 Difference]: Finished difference Result 258 states and 303 transitions. [2023-11-12 01:02:30,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-12 01:02:30,881 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 5 states have internal predecessors, (20), 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 22 [2023-11-12 01:02:30,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 01:02:30,883 INFO L225 Difference]: With dead ends: 258 [2023-11-12 01:02:30,883 INFO L226 Difference]: Without dead ends: 258 [2023-11-12 01:02:30,883 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-12 01:02:30,884 INFO L413 NwaCegarLoop]: 188 mSDtfsCounter, 19 mSDsluCounter, 490 mSDsCounter, 0 mSdLazyCounter, 222 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 678 SdHoareTripleChecker+Invalid, 222 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 222 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-12 01:02:30,884 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 678 Invalid, 222 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 222 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-12 01:02:30,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 258 states. [2023-11-12 01:02:30,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 258 to 258. [2023-11-12 01:02:30,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 258 states, 157 states have (on average 1.8407643312101911) internal successors, (289), 255 states have internal predecessors, (289), 12 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-12 01:02:30,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 258 states to 258 states and 303 transitions. [2023-11-12 01:02:30,894 INFO L78 Accepts]: Start accepts. Automaton has 258 states and 303 transitions. Word has length 22 [2023-11-12 01:02:30,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 01:02:30,894 INFO L495 AbstractCegarLoop]: Abstraction has 258 states and 303 transitions. [2023-11-12 01:02:30,894 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 5 states have internal predecessors, (20), 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) [2023-11-12 01:02:30,894 INFO L276 IsEmpty]: Start isEmpty. Operand 258 states and 303 transitions. [2023-11-12 01:02:30,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2023-11-12 01:02:30,897 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 01:02:30,897 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 01:02:30,897 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-11-12 01:02:30,898 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr26REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [failErr0ASSERT_VIOLATIONMEMORY_LEAK, merge_single_nodeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, merge_single_nodeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 102 more)] === [2023-11-12 01:02:30,898 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 01:02:30,898 INFO L85 PathProgramCache]: Analyzing trace with hash -1484462606, now seen corresponding path program 1 times [2023-11-12 01:02:30,898 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 01:02:30,898 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1002965159] [2023-11-12 01:02:30,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 01:02:30,899 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 01:02:30,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 01:02:31,189 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 01:02:31,190 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 01:02:31,190 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1002965159] [2023-11-12 01:02:31,190 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1002965159] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 01:02:31,190 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 01:02:31,191 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-12 01:02:31,191 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [43805005] [2023-11-12 01:02:31,191 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 01:02:31,192 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-12 01:02:31,192 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 01:02:31,193 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-12 01:02:31,193 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2023-11-12 01:02:31,193 INFO L87 Difference]: Start difference. First operand 258 states and 303 transitions. Second operand has 8 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 8 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 01:02:31,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 01:02:31,780 INFO L93 Difference]: Finished difference Result 307 states and 341 transitions. [2023-11-12 01:02:31,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-12 01:02:31,780 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 8 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2023-11-12 01:02:31,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 01:02:31,782 INFO L225 Difference]: With dead ends: 307 [2023-11-12 01:02:31,782 INFO L226 Difference]: Without dead ends: 307 [2023-11-12 01:02:31,783 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2023-11-12 01:02:31,783 INFO L413 NwaCegarLoop]: 161 mSDtfsCounter, 172 mSDsluCounter, 656 mSDsCounter, 0 mSdLazyCounter, 749 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 172 SdHoareTripleChecker+Valid, 817 SdHoareTripleChecker+Invalid, 754 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 749 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-12 01:02:31,784 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [172 Valid, 817 Invalid, 754 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 749 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-12 01:02:31,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 307 states. [2023-11-12 01:02:31,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 307 to 259. [2023-11-12 01:02:31,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 259 states, 158 states have (on average 1.8417721518987342) internal successors, (291), 256 states have internal predecessors, (291), 12 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-12 01:02:31,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 259 states to 259 states and 305 transitions. [2023-11-12 01:02:31,798 INFO L78 Accepts]: Start accepts. Automaton has 259 states and 305 transitions. Word has length 24 [2023-11-12 01:02:31,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 01:02:31,799 INFO L495 AbstractCegarLoop]: Abstraction has 259 states and 305 transitions. [2023-11-12 01:02:31,800 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 8 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 01:02:31,800 INFO L276 IsEmpty]: Start isEmpty. Operand 259 states and 305 transitions. [2023-11-12 01:02:31,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2023-11-12 01:02:31,804 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 01:02:31,804 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 01:02:31,804 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-11-12 01:02:31,805 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr27REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [failErr0ASSERT_VIOLATIONMEMORY_LEAK, merge_single_nodeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, merge_single_nodeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 102 more)] === [2023-11-12 01:02:31,805 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 01:02:31,805 INFO L85 PathProgramCache]: Analyzing trace with hash -1484462605, now seen corresponding path program 1 times [2023-11-12 01:02:31,806 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 01:02:31,806 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1294811601] [2023-11-12 01:02:31,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 01:02:31,806 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 01:02:31,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 01:02:32,274 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 01:02:32,275 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 01:02:32,275 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1294811601] [2023-11-12 01:02:32,275 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1294811601] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 01:02:32,275 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 01:02:32,276 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-11-12 01:02:32,276 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2080753771] [2023-11-12 01:02:32,276 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 01:02:32,276 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-12 01:02:32,276 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 01:02:32,277 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-12 01:02:32,277 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2023-11-12 01:02:32,277 INFO L87 Difference]: Start difference. First operand 259 states and 305 transitions. Second operand has 9 states, 8 states have (on average 3.0) internal successors, (24), 9 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 01:02:33,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 01:02:33,024 INFO L93 Difference]: Finished difference Result 315 states and 349 transitions. [2023-11-12 01:02:33,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-12 01:02:33,024 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 3.0) internal successors, (24), 9 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2023-11-12 01:02:33,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 01:02:33,026 INFO L225 Difference]: With dead ends: 315 [2023-11-12 01:02:33,027 INFO L226 Difference]: Without dead ends: 315 [2023-11-12 01:02:33,027 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2023-11-12 01:02:33,028 INFO L413 NwaCegarLoop]: 155 mSDtfsCounter, 181 mSDsluCounter, 616 mSDsCounter, 0 mSdLazyCounter, 800 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 181 SdHoareTripleChecker+Valid, 771 SdHoareTripleChecker+Invalid, 803 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 800 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-12 01:02:33,028 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [181 Valid, 771 Invalid, 803 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 800 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-12 01:02:33,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 315 states. [2023-11-12 01:02:33,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 315 to 259. [2023-11-12 01:02:33,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 259 states, 158 states have (on average 1.8354430379746836) internal successors, (290), 256 states have internal predecessors, (290), 12 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-12 01:02:33,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 259 states to 259 states and 304 transitions. [2023-11-12 01:02:33,037 INFO L78 Accepts]: Start accepts. Automaton has 259 states and 304 transitions. Word has length 24 [2023-11-12 01:02:33,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 01:02:33,038 INFO L495 AbstractCegarLoop]: Abstraction has 259 states and 304 transitions. [2023-11-12 01:02:33,038 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 3.0) internal successors, (24), 9 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 01:02:33,038 INFO L276 IsEmpty]: Start isEmpty. Operand 259 states and 304 transitions. [2023-11-12 01:02:33,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-11-12 01:02:33,039 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 01:02:33,039 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 01:02:33,039 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-11-12 01:02:33,039 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting failErr0ASSERT_VIOLATIONMEMORY_LEAK === [failErr0ASSERT_VIOLATIONMEMORY_LEAK, merge_single_nodeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, merge_single_nodeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 102 more)] === [2023-11-12 01:02:33,040 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 01:02:33,040 INFO L85 PathProgramCache]: Analyzing trace with hash 1232961035, now seen corresponding path program 1 times [2023-11-12 01:02:33,040 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 01:02:33,040 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1514777559] [2023-11-12 01:02:33,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 01:02:33,041 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 01:02:33,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 01:02:33,214 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 01:02:33,214 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 01:02:33,214 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1514777559] [2023-11-12 01:02:33,214 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1514777559] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 01:02:33,215 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 01:02:33,215 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-12 01:02:33,215 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [675247047] [2023-11-12 01:02:33,215 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 01:02:33,215 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-12 01:02:33,216 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 01:02:33,216 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-12 01:02:33,216 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-11-12 01:02:33,217 INFO L87 Difference]: Start difference. First operand 259 states and 304 transitions. Second operand has 7 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 7 states have internal predecessors, (24), 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) [2023-11-12 01:02:33,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 01:02:33,579 INFO L93 Difference]: Finished difference Result 317 states and 350 transitions. [2023-11-12 01:02:33,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-12 01:02:33,580 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 7 states have internal predecessors, (24), 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 25 [2023-11-12 01:02:33,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 01:02:33,582 INFO L225 Difference]: With dead ends: 317 [2023-11-12 01:02:33,582 INFO L226 Difference]: Without dead ends: 317 [2023-11-12 01:02:33,582 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2023-11-12 01:02:33,583 INFO L413 NwaCegarLoop]: 175 mSDtfsCounter, 184 mSDsluCounter, 771 mSDsCounter, 0 mSdLazyCounter, 393 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 184 SdHoareTripleChecker+Valid, 946 SdHoareTripleChecker+Invalid, 393 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 393 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-12 01:02:33,583 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [184 Valid, 946 Invalid, 393 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 393 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-12 01:02:33,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 317 states. [2023-11-12 01:02:33,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 317 to 259. [2023-11-12 01:02:33,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 259 states, 158 states have (on average 1.8291139240506329) internal successors, (289), 256 states have internal predecessors, (289), 12 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-12 01:02:33,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 259 states to 259 states and 303 transitions. [2023-11-12 01:02:33,592 INFO L78 Accepts]: Start accepts. Automaton has 259 states and 303 transitions. Word has length 25 [2023-11-12 01:02:33,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 01:02:33,592 INFO L495 AbstractCegarLoop]: Abstraction has 259 states and 303 transitions. [2023-11-12 01:02:33,592 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 7 states have internal predecessors, (24), 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) [2023-11-12 01:02:33,592 INFO L276 IsEmpty]: Start isEmpty. Operand 259 states and 303 transitions. [2023-11-12 01:02:33,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-11-12 01:02:33,593 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 01:02:33,593 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 01:02:33,593 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-11-12 01:02:33,594 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting failErr0ASSERT_VIOLATIONMEMORY_LEAK === [failErr0ASSERT_VIOLATIONMEMORY_LEAK, merge_single_nodeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, merge_single_nodeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 102 more)] === [2023-11-12 01:02:33,594 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 01:02:33,594 INFO L85 PathProgramCache]: Analyzing trace with hash 1708976670, now seen corresponding path program 1 times [2023-11-12 01:02:33,595 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 01:02:33,595 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1387137301] [2023-11-12 01:02:33,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 01:02:33,595 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 01:02:33,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 01:02:33,776 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 01:02:33,777 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 01:02:33,777 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1387137301] [2023-11-12 01:02:33,777 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1387137301] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 01:02:33,777 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 01:02:33,777 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-12 01:02:33,777 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [309976787] [2023-11-12 01:02:33,778 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 01:02:33,778 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-12 01:02:33,778 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 01:02:33,779 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-12 01:02:33,779 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-11-12 01:02:33,779 INFO L87 Difference]: Start difference. First operand 259 states and 303 transitions. Second operand has 7 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 7 states have internal predecessors, (24), 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) [2023-11-12 01:02:34,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 01:02:34,124 INFO L93 Difference]: Finished difference Result 316 states and 348 transitions. [2023-11-12 01:02:34,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-12 01:02:34,125 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 7 states have internal predecessors, (24), 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 25 [2023-11-12 01:02:34,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 01:02:34,127 INFO L225 Difference]: With dead ends: 316 [2023-11-12 01:02:34,127 INFO L226 Difference]: Without dead ends: 316 [2023-11-12 01:02:34,128 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2023-11-12 01:02:34,128 INFO L413 NwaCegarLoop]: 175 mSDtfsCounter, 182 mSDsluCounter, 771 mSDsCounter, 0 mSdLazyCounter, 393 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 182 SdHoareTripleChecker+Valid, 946 SdHoareTripleChecker+Invalid, 393 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 393 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-12 01:02:34,129 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [182 Valid, 946 Invalid, 393 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 393 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-12 01:02:34,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 316 states. [2023-11-12 01:02:34,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 316 to 259. [2023-11-12 01:02:34,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 259 states, 158 states have (on average 1.8227848101265822) internal successors, (288), 256 states have internal predecessors, (288), 12 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-12 01:02:34,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 259 states to 259 states and 302 transitions. [2023-11-12 01:02:34,138 INFO L78 Accepts]: Start accepts. Automaton has 259 states and 302 transitions. Word has length 25 [2023-11-12 01:02:34,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 01:02:34,138 INFO L495 AbstractCegarLoop]: Abstraction has 259 states and 302 transitions. [2023-11-12 01:02:34,138 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 7 states have internal predecessors, (24), 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) [2023-11-12 01:02:34,138 INFO L276 IsEmpty]: Start isEmpty. Operand 259 states and 302 transitions. [2023-11-12 01:02:34,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2023-11-12 01:02:34,139 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 01:02:34,139 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 01:02:34,139 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-11-12 01:02:34,140 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr16REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [failErr0ASSERT_VIOLATIONMEMORY_LEAK, merge_single_nodeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, merge_single_nodeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 102 more)] === [2023-11-12 01:02:34,140 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 01:02:34,140 INFO L85 PathProgramCache]: Analyzing trace with hash 609027988, now seen corresponding path program 1 times [2023-11-12 01:02:34,140 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 01:02:34,141 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1021622891] [2023-11-12 01:02:34,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 01:02:34,141 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 01:02:34,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 01:02:34,398 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 01:02:34,398 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 01:02:34,399 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1021622891] [2023-11-12 01:02:34,399 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1021622891] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 01:02:34,399 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 01:02:34,399 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-12 01:02:34,399 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1426718142] [2023-11-12 01:02:34,400 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 01:02:34,400 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-12 01:02:34,400 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 01:02:34,401 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-12 01:02:34,401 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2023-11-12 01:02:34,401 INFO L87 Difference]: Start difference. First operand 259 states and 302 transitions. Second operand has 8 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 8 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 01:02:34,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 01:02:34,972 INFO L93 Difference]: Finished difference Result 303 states and 335 transitions. [2023-11-12 01:02:34,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-12 01:02:34,973 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 8 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2023-11-12 01:02:34,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 01:02:34,975 INFO L225 Difference]: With dead ends: 303 [2023-11-12 01:02:34,975 INFO L226 Difference]: Without dead ends: 303 [2023-11-12 01:02:34,975 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2023-11-12 01:02:34,976 INFO L413 NwaCegarLoop]: 161 mSDtfsCounter, 164 mSDsluCounter, 656 mSDsCounter, 0 mSdLazyCounter, 749 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 164 SdHoareTripleChecker+Valid, 817 SdHoareTripleChecker+Invalid, 754 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 749 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-12 01:02:34,976 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [164 Valid, 817 Invalid, 754 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 749 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-12 01:02:34,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 303 states. [2023-11-12 01:02:34,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 303 to 259. [2023-11-12 01:02:34,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 259 states, 158 states have (on average 1.8164556962025316) internal successors, (287), 256 states have internal predecessors, (287), 12 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-12 01:02:34,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 259 states to 259 states and 301 transitions. [2023-11-12 01:02:34,985 INFO L78 Accepts]: Start accepts. Automaton has 259 states and 301 transitions. Word has length 24 [2023-11-12 01:02:34,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 01:02:34,985 INFO L495 AbstractCegarLoop]: Abstraction has 259 states and 301 transitions. [2023-11-12 01:02:34,985 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 8 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 01:02:34,985 INFO L276 IsEmpty]: Start isEmpty. Operand 259 states and 301 transitions. [2023-11-12 01:02:34,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2023-11-12 01:02:34,986 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 01:02:34,986 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 01:02:34,986 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2023-11-12 01:02:34,987 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr17REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [failErr0ASSERT_VIOLATIONMEMORY_LEAK, merge_single_nodeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, merge_single_nodeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 102 more)] === [2023-11-12 01:02:34,987 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 01:02:34,987 INFO L85 PathProgramCache]: Analyzing trace with hash 609027989, now seen corresponding path program 1 times [2023-11-12 01:02:34,987 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 01:02:34,987 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2046669186] [2023-11-12 01:02:34,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 01:02:34,988 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 01:02:35,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 01:02:35,379 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 01:02:35,380 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 01:02:35,380 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2046669186] [2023-11-12 01:02:35,380 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2046669186] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 01:02:35,380 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 01:02:35,380 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-11-12 01:02:35,380 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [545741944] [2023-11-12 01:02:35,381 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 01:02:35,381 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-12 01:02:35,381 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 01:02:35,382 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-12 01:02:35,382 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2023-11-12 01:02:35,382 INFO L87 Difference]: Start difference. First operand 259 states and 301 transitions. Second operand has 9 states, 8 states have (on average 3.0) internal successors, (24), 9 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 01:02:36,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 01:02:36,008 INFO L93 Difference]: Finished difference Result 311 states and 343 transitions. [2023-11-12 01:02:36,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-12 01:02:36,009 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 3.0) internal successors, (24), 9 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2023-11-12 01:02:36,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 01:02:36,011 INFO L225 Difference]: With dead ends: 311 [2023-11-12 01:02:36,011 INFO L226 Difference]: Without dead ends: 311 [2023-11-12 01:02:36,011 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2023-11-12 01:02:36,012 INFO L413 NwaCegarLoop]: 155 mSDtfsCounter, 174 mSDsluCounter, 540 mSDsCounter, 0 mSdLazyCounter, 648 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 174 SdHoareTripleChecker+Valid, 695 SdHoareTripleChecker+Invalid, 651 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 648 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-12 01:02:36,012 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [174 Valid, 695 Invalid, 651 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 648 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-12 01:02:36,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 311 states. [2023-11-12 01:02:36,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 311 to 259. [2023-11-12 01:02:36,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 259 states, 158 states have (on average 1.8101265822784811) internal successors, (286), 256 states have internal predecessors, (286), 12 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-12 01:02:36,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 259 states to 259 states and 300 transitions. [2023-11-12 01:02:36,022 INFO L78 Accepts]: Start accepts. Automaton has 259 states and 300 transitions. Word has length 24 [2023-11-12 01:02:36,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 01:02:36,022 INFO L495 AbstractCegarLoop]: Abstraction has 259 states and 300 transitions. [2023-11-12 01:02:36,023 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 3.0) internal successors, (24), 9 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 01:02:36,023 INFO L276 IsEmpty]: Start isEmpty. Operand 259 states and 300 transitions. [2023-11-12 01:02:36,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2023-11-12 01:02:36,023 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 01:02:36,024 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 01:02:36,024 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2023-11-12 01:02:36,025 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting failErr0ASSERT_VIOLATIONMEMORY_LEAK === [failErr0ASSERT_VIOLATIONMEMORY_LEAK, merge_single_nodeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, merge_single_nodeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 102 more)] === [2023-11-12 01:02:36,026 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 01:02:36,026 INFO L85 PathProgramCache]: Analyzing trace with hash -615117672, now seen corresponding path program 1 times [2023-11-12 01:02:36,026 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 01:02:36,026 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1631281107] [2023-11-12 01:02:36,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 01:02:36,027 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 01:02:36,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 01:02:36,550 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 01:02:36,550 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 01:02:36,550 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1631281107] [2023-11-12 01:02:36,550 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1631281107] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 01:02:36,551 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 01:02:36,551 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-11-12 01:02:36,551 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1309963915] [2023-11-12 01:02:36,551 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 01:02:36,552 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-12 01:02:36,552 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 01:02:36,552 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-12 01:02:36,553 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2023-11-12 01:02:36,553 INFO L87 Difference]: Start difference. First operand 259 states and 300 transitions. Second operand has 9 states, 9 states have (on average 3.111111111111111) internal successors, (28), 9 states have internal predecessors, (28), 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) [2023-11-12 01:02:37,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 01:02:37,218 INFO L93 Difference]: Finished difference Result 313 states and 344 transitions. [2023-11-12 01:02:37,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-12 01:02:37,219 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.111111111111111) internal successors, (28), 9 states have internal predecessors, (28), 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 29 [2023-11-12 01:02:37,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 01:02:37,221 INFO L225 Difference]: With dead ends: 313 [2023-11-12 01:02:37,222 INFO L226 Difference]: Without dead ends: 313 [2023-11-12 01:02:37,222 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2023-11-12 01:02:37,223 INFO L413 NwaCegarLoop]: 175 mSDtfsCounter, 173 mSDsluCounter, 1028 mSDsCounter, 0 mSdLazyCounter, 604 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 173 SdHoareTripleChecker+Valid, 1203 SdHoareTripleChecker+Invalid, 607 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 604 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-12 01:02:37,223 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [173 Valid, 1203 Invalid, 607 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 604 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-12 01:02:37,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 313 states. [2023-11-12 01:02:37,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 313 to 260. [2023-11-12 01:02:37,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 260 states, 159 states have (on average 1.8050314465408805) internal successors, (287), 257 states have internal predecessors, (287), 12 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-12 01:02:37,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 260 states to 260 states and 301 transitions. [2023-11-12 01:02:37,232 INFO L78 Accepts]: Start accepts. Automaton has 260 states and 301 transitions. Word has length 29 [2023-11-12 01:02:37,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 01:02:37,232 INFO L495 AbstractCegarLoop]: Abstraction has 260 states and 301 transitions. [2023-11-12 01:02:37,232 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.111111111111111) internal successors, (28), 9 states have internal predecessors, (28), 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) [2023-11-12 01:02:37,233 INFO L276 IsEmpty]: Start isEmpty. Operand 260 states and 301 transitions. [2023-11-12 01:02:37,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2023-11-12 01:02:37,233 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 01:02:37,233 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 01:02:37,233 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2023-11-12 01:02:37,234 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting failErr0ASSERT_VIOLATIONMEMORY_LEAK === [failErr0ASSERT_VIOLATIONMEMORY_LEAK, merge_single_nodeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, merge_single_nodeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 102 more)] === [2023-11-12 01:02:37,234 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 01:02:37,234 INFO L85 PathProgramCache]: Analyzing trace with hash 2069257835, now seen corresponding path program 1 times [2023-11-12 01:02:37,235 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 01:02:37,235 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [463105184] [2023-11-12 01:02:37,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 01:02:37,235 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 01:02:37,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 01:02:37,695 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 01:02:37,696 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 01:02:37,696 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [463105184] [2023-11-12 01:02:37,696 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [463105184] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 01:02:37,696 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 01:02:37,696 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-11-12 01:02:37,697 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1260876179] [2023-11-12 01:02:37,697 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 01:02:37,697 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-12 01:02:37,697 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 01:02:37,698 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-12 01:02:37,698 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2023-11-12 01:02:37,698 INFO L87 Difference]: Start difference. First operand 260 states and 301 transitions. Second operand has 9 states, 9 states have (on average 3.111111111111111) internal successors, (28), 9 states have internal predecessors, (28), 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) [2023-11-12 01:02:38,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 01:02:38,391 INFO L93 Difference]: Finished difference Result 312 states and 342 transitions. [2023-11-12 01:02:38,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-12 01:02:38,392 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.111111111111111) internal successors, (28), 9 states have internal predecessors, (28), 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 29 [2023-11-12 01:02:38,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 01:02:38,394 INFO L225 Difference]: With dead ends: 312 [2023-11-12 01:02:38,394 INFO L226 Difference]: Without dead ends: 312 [2023-11-12 01:02:38,395 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2023-11-12 01:02:38,396 INFO L413 NwaCegarLoop]: 175 mSDtfsCounter, 171 mSDsluCounter, 1028 mSDsCounter, 0 mSdLazyCounter, 604 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 171 SdHoareTripleChecker+Valid, 1203 SdHoareTripleChecker+Invalid, 607 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 604 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-12 01:02:38,396 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [171 Valid, 1203 Invalid, 607 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 604 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-12 01:02:38,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 312 states. [2023-11-12 01:02:38,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 312 to 260. [2023-11-12 01:02:38,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 260 states, 159 states have (on average 1.79874213836478) internal successors, (286), 257 states have internal predecessors, (286), 12 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-12 01:02:38,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 260 states to 260 states and 300 transitions. [2023-11-12 01:02:38,406 INFO L78 Accepts]: Start accepts. Automaton has 260 states and 300 transitions. Word has length 29 [2023-11-12 01:02:38,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 01:02:38,406 INFO L495 AbstractCegarLoop]: Abstraction has 260 states and 300 transitions. [2023-11-12 01:02:38,407 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.111111111111111) internal successors, (28), 9 states have internal predecessors, (28), 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) [2023-11-12 01:02:38,407 INFO L276 IsEmpty]: Start isEmpty. Operand 260 states and 300 transitions. [2023-11-12 01:02:38,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2023-11-12 01:02:38,407 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 01:02:38,408 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 01:02:38,408 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2023-11-12 01:02:38,408 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [failErr0ASSERT_VIOLATIONMEMORY_LEAK, merge_single_nodeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, merge_single_nodeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 102 more)] === [2023-11-12 01:02:38,409 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 01:02:38,409 INFO L85 PathProgramCache]: Analyzing trace with hash -1596074747, now seen corresponding path program 1 times [2023-11-12 01:02:38,409 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 01:02:38,409 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [987855436] [2023-11-12 01:02:38,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 01:02:38,410 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 01:02:38,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 01:02:38,805 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 01:02:38,805 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 01:02:38,805 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [987855436] [2023-11-12 01:02:38,806 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [987855436] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 01:02:38,806 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1236705182] [2023-11-12 01:02:38,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 01:02:38,806 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 01:02:38,806 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f4415f5-109d-4842-a95f-f8a92e4fddac/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 01:02:38,810 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f4415f5-109d-4842-a95f-f8a92e4fddac/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 01:02:38,830 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f4415f5-109d-4842-a95f-f8a92e4fddac/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-12 01:02:38,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 01:02:38,960 INFO L262 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 28 conjunts are in the unsatisfiable core [2023-11-12 01:02:38,966 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 01:02:39,061 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-12 01:02:39,066 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-12 01:02:39,169 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 01:02:39,169 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 01:02:39,420 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 01:02:39,420 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1236705182] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 01:02:39,420 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1282916005] [2023-11-12 01:02:39,443 INFO L159 IcfgInterpreter]: Started Sifa with 26 locations of interest [2023-11-12 01:02:39,443 INFO L166 IcfgInterpreter]: Building call graph [2023-11-12 01:02:39,447 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-12 01:02:39,452 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-12 01:02:39,453 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-12 01:02:46,280 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-12 01:02:48,760 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '11373#(and (or (and (= |ULTIMATE.start_inspect_before_~shape#1.base| |ULTIMATE.start_inspect_before_#in~shape#1.base|) (= |ULTIMATE.start_main_~data~0#1.base| |ULTIMATE.start_inspect_before_#in~shape#1.base|) (= 0 |ULTIMATE.start_inspect_before_~shape#1.offset|) (not (= |ULTIMATE.start_main_~data~0#1.base| 0))) (exists ((|v_ULTIMATE.start_inspect_before_~shape#1.base_43| Int) (|v_ULTIMATE.start_inspect_before_~shape#1.offset_35| Int)) (and (= |ULTIMATE.start_inspect_before_~shape#1.offset| (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_inspect_before_~shape#1.base_43|) (+ |v_ULTIMATE.start_inspect_before_~shape#1.offset_35| 4))) (= |ULTIMATE.start_inspect_before_~shape#1.base| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_inspect_before_~shape#1.base_43|) (+ |v_ULTIMATE.start_inspect_before_~shape#1.offset_35| 4))) (<= (+ |v_ULTIMATE.start_inspect_before_~shape#1.offset_35| 8) (select |#length| |v_ULTIMATE.start_inspect_before_~shape#1.base_43|)) (<= 0 |v_ULTIMATE.start_inspect_before_~shape#1.offset_35|) (= (select |#valid| |v_ULTIMATE.start_inspect_before_~shape#1.base_43|) 1)))) (<= 1 |#StackHeapBarrier|) (not (= (select |#valid| |ULTIMATE.start_inspect_before_~shape#1.base|) 1)) (= 0 |ULTIMATE.start_main_~data~0#1.offset|) (= |ULTIMATE.start_inspect_before_#in~shape#1.offset| 0))' at error location [2023-11-12 01:02:48,760 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-12 01:02:48,760 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 01:02:48,760 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6, 7] total 14 [2023-11-12 01:02:48,760 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1182325466] [2023-11-12 01:02:48,761 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 01:02:48,761 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-12 01:02:48,761 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 01:02:48,762 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-12 01:02:48,762 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=997, Unknown=1, NotChecked=0, Total=1122 [2023-11-12 01:02:48,763 INFO L87 Difference]: Start difference. First operand 260 states and 300 transitions. Second operand has 15 states, 15 states have (on average 3.6) internal successors, (54), 14 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 01:02:49,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 01:02:49,440 INFO L93 Difference]: Finished difference Result 357 states and 406 transitions. [2023-11-12 01:02:49,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-12 01:02:49,441 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.6) internal successors, (54), 14 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2023-11-12 01:02:49,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 01:02:49,443 INFO L225 Difference]: With dead ends: 357 [2023-11-12 01:02:49,443 INFO L226 Difference]: Without dead ends: 357 [2023-11-12 01:02:49,444 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 58 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 333 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=138, Invalid=1121, Unknown=1, NotChecked=0, Total=1260 [2023-11-12 01:02:49,445 INFO L413 NwaCegarLoop]: 180 mSDtfsCounter, 196 mSDsluCounter, 1482 mSDsCounter, 0 mSdLazyCounter, 685 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 196 SdHoareTripleChecker+Valid, 1662 SdHoareTripleChecker+Invalid, 687 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 685 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-12 01:02:49,445 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [196 Valid, 1662 Invalid, 687 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 685 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-12 01:02:49,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 357 states. [2023-11-12 01:02:49,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 357 to 271. [2023-11-12 01:02:49,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 271 states, 170 states have (on average 1.7529411764705882) internal successors, (298), 268 states have internal predecessors, (298), 12 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-12 01:02:49,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 271 states to 271 states and 312 transitions. [2023-11-12 01:02:49,455 INFO L78 Accepts]: Start accepts. Automaton has 271 states and 312 transitions. Word has length 28 [2023-11-12 01:02:49,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 01:02:49,455 INFO L495 AbstractCegarLoop]: Abstraction has 271 states and 312 transitions. [2023-11-12 01:02:49,456 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.6) internal successors, (54), 14 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 01:02:49,456 INFO L276 IsEmpty]: Start isEmpty. Operand 271 states and 312 transitions. [2023-11-12 01:02:49,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2023-11-12 01:02:49,457 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 01:02:49,457 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 01:02:49,474 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f4415f5-109d-4842-a95f-f8a92e4fddac/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-12 01:02:49,663 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f4415f5-109d-4842-a95f-f8a92e4fddac/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2023-11-12 01:02:49,664 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr30REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [failErr0ASSERT_VIOLATIONMEMORY_LEAK, merge_single_nodeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, merge_single_nodeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 102 more)] === [2023-11-12 01:02:49,665 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 01:02:49,665 INFO L85 PathProgramCache]: Analyzing trace with hash 62568740, now seen corresponding path program 1 times [2023-11-12 01:02:49,665 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 01:02:49,665 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [142961955] [2023-11-12 01:02:49,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 01:02:49,666 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 01:02:49,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 01:02:49,751 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-12 01:02:49,752 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 01:02:49,752 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [142961955] [2023-11-12 01:02:49,752 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [142961955] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 01:02:49,753 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 01:02:49,753 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-12 01:02:49,753 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1875396010] [2023-11-12 01:02:49,753 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 01:02:49,754 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-12 01:02:49,754 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 01:02:49,754 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-12 01:02:49,755 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-12 01:02:49,755 INFO L87 Difference]: Start difference. First operand 271 states and 312 transitions. Second operand has 4 states, 3 states have (on average 10.0) internal successors, (30), 4 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 01:02:50,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 01:02:50,141 INFO L93 Difference]: Finished difference Result 324 states and 374 transitions. [2023-11-12 01:02:50,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-12 01:02:50,144 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 10.0) internal successors, (30), 4 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2023-11-12 01:02:50,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 01:02:50,146 INFO L225 Difference]: With dead ends: 324 [2023-11-12 01:02:50,146 INFO L226 Difference]: Without dead ends: 324 [2023-11-12 01:02:50,146 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-12 01:02:50,147 INFO L413 NwaCegarLoop]: 148 mSDtfsCounter, 257 mSDsluCounter, 138 mSDsCounter, 0 mSdLazyCounter, 256 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 259 SdHoareTripleChecker+Valid, 286 SdHoareTripleChecker+Invalid, 278 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 256 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-12 01:02:50,147 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [259 Valid, 286 Invalid, 278 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 256 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-12 01:02:50,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 324 states. [2023-11-12 01:02:50,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 324 to 271. [2023-11-12 01:02:50,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 271 states, 172 states have (on average 1.744186046511628) internal successors, (300), 268 states have internal predecessors, (300), 12 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-12 01:02:50,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 271 states to 271 states and 314 transitions. [2023-11-12 01:02:50,159 INFO L78 Accepts]: Start accepts. Automaton has 271 states and 314 transitions. Word has length 31 [2023-11-12 01:02:50,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 01:02:50,159 INFO L495 AbstractCegarLoop]: Abstraction has 271 states and 314 transitions. [2023-11-12 01:02:50,160 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 10.0) internal successors, (30), 4 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 01:02:50,160 INFO L276 IsEmpty]: Start isEmpty. Operand 271 states and 314 transitions. [2023-11-12 01:02:50,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2023-11-12 01:02:50,160 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 01:02:50,161 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 01:02:50,161 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2023-11-12 01:02:50,161 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr31REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [failErr0ASSERT_VIOLATIONMEMORY_LEAK, merge_single_nodeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, merge_single_nodeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 102 more)] === [2023-11-12 01:02:50,161 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 01:02:50,162 INFO L85 PathProgramCache]: Analyzing trace with hash 62568741, now seen corresponding path program 1 times [2023-11-12 01:02:50,162 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 01:02:50,162 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [657152389] [2023-11-12 01:02:50,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 01:02:50,162 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 01:02:50,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 01:02:50,351 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 01:02:50,351 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 01:02:50,352 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [657152389] [2023-11-12 01:02:50,352 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [657152389] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 01:02:50,352 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 01:02:50,352 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-12 01:02:50,352 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [118528915] [2023-11-12 01:02:50,352 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 01:02:50,353 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-12 01:02:50,353 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 01:02:50,353 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-12 01:02:50,354 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-12 01:02:50,354 INFO L87 Difference]: Start difference. First operand 271 states and 314 transitions. Second operand has 5 states, 4 states have (on average 7.75) internal successors, (31), 5 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 01:02:50,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 01:02:50,832 INFO L93 Difference]: Finished difference Result 311 states and 344 transitions. [2023-11-12 01:02:50,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-12 01:02:50,832 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 7.75) internal successors, (31), 5 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2023-11-12 01:02:50,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 01:02:50,834 INFO L225 Difference]: With dead ends: 311 [2023-11-12 01:02:50,834 INFO L226 Difference]: Without dead ends: 311 [2023-11-12 01:02:50,835 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-11-12 01:02:50,835 INFO L413 NwaCegarLoop]: 158 mSDtfsCounter, 106 mSDsluCounter, 313 mSDsCounter, 0 mSdLazyCounter, 406 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 471 SdHoareTripleChecker+Invalid, 410 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 406 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-12 01:02:50,836 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [106 Valid, 471 Invalid, 410 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 406 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-12 01:02:50,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 311 states. [2023-11-12 01:02:50,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 311 to 276. [2023-11-12 01:02:50,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 276 states, 177 states have (on average 1.734463276836158) internal successors, (307), 273 states have internal predecessors, (307), 12 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-12 01:02:50,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 276 states to 276 states and 321 transitions. [2023-11-12 01:02:50,844 INFO L78 Accepts]: Start accepts. Automaton has 276 states and 321 transitions. Word has length 31 [2023-11-12 01:02:50,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 01:02:50,845 INFO L495 AbstractCegarLoop]: Abstraction has 276 states and 321 transitions. [2023-11-12 01:02:50,845 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 7.75) internal successors, (31), 5 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 01:02:50,845 INFO L276 IsEmpty]: Start isEmpty. Operand 276 states and 321 transitions. [2023-11-12 01:02:50,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2023-11-12 01:02:50,846 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 01:02:50,846 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 01:02:50,846 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2023-11-12 01:02:50,846 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr28REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [failErr0ASSERT_VIOLATIONMEMORY_LEAK, merge_single_nodeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, merge_single_nodeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 102 more)] === [2023-11-12 01:02:50,847 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 01:02:50,847 INFO L85 PathProgramCache]: Analyzing trace with hash 1939954021, now seen corresponding path program 1 times [2023-11-12 01:02:50,847 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 01:02:50,847 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [721794076] [2023-11-12 01:02:50,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 01:02:50,848 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 01:02:50,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 01:02:50,937 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 01:02:50,938 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 01:02:50,938 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [721794076] [2023-11-12 01:02:50,938 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [721794076] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 01:02:50,938 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 01:02:50,938 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-12 01:02:50,938 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1762146489] [2023-11-12 01:02:50,939 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 01:02:50,941 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-12 01:02:50,941 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 01:02:50,942 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-12 01:02:50,942 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-12 01:02:50,942 INFO L87 Difference]: Start difference. First operand 276 states and 321 transitions. Second operand has 5 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 01:02:51,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 01:02:51,225 INFO L93 Difference]: Finished difference Result 426 states and 474 transitions. [2023-11-12 01:02:51,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-12 01:02:51,225 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2023-11-12 01:02:51,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 01:02:51,228 INFO L225 Difference]: With dead ends: 426 [2023-11-12 01:02:51,228 INFO L226 Difference]: Without dead ends: 426 [2023-11-12 01:02:51,229 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-11-12 01:02:51,229 INFO L413 NwaCegarLoop]: 191 mSDtfsCounter, 281 mSDsluCounter, 556 mSDsCounter, 0 mSdLazyCounter, 201 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 283 SdHoareTripleChecker+Valid, 747 SdHoareTripleChecker+Invalid, 205 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 201 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-12 01:02:51,230 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [283 Valid, 747 Invalid, 205 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 201 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-12 01:02:51,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 426 states. [2023-11-12 01:02:51,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 426 to 276. [2023-11-12 01:02:51,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 276 states, 177 states have (on average 1.728813559322034) internal successors, (306), 273 states have internal predecessors, (306), 12 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-12 01:02:51,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 276 states to 276 states and 320 transitions. [2023-11-12 01:02:51,240 INFO L78 Accepts]: Start accepts. Automaton has 276 states and 320 transitions. Word has length 32 [2023-11-12 01:02:51,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 01:02:51,240 INFO L495 AbstractCegarLoop]: Abstraction has 276 states and 320 transitions. [2023-11-12 01:02:51,241 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 01:02:51,241 INFO L276 IsEmpty]: Start isEmpty. Operand 276 states and 320 transitions. [2023-11-12 01:02:51,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2023-11-12 01:02:51,241 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 01:02:51,242 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 01:02:51,242 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2023-11-12 01:02:51,242 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr67REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [failErr0ASSERT_VIOLATIONMEMORY_LEAK, merge_single_nodeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, merge_single_nodeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 102 more)] === [2023-11-12 01:02:51,242 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 01:02:51,243 INFO L85 PathProgramCache]: Analyzing trace with hash 1065265, now seen corresponding path program 1 times [2023-11-12 01:02:51,243 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 01:02:51,243 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1269412673] [2023-11-12 01:02:51,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 01:02:51,243 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 01:02:51,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 01:02:51,314 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-12 01:02:51,314 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 01:02:51,314 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1269412673] [2023-11-12 01:02:51,315 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1269412673] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 01:02:51,315 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 01:02:51,315 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-12 01:02:51,315 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [984486823] [2023-11-12 01:02:51,315 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 01:02:51,316 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-12 01:02:51,316 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 01:02:51,316 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-12 01:02:51,317 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-12 01:02:51,317 INFO L87 Difference]: Start difference. First operand 276 states and 320 transitions. Second operand has 4 states, 3 states have (on average 10.666666666666666) internal successors, (32), 4 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 01:02:51,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 01:02:51,643 INFO L93 Difference]: Finished difference Result 325 states and 373 transitions. [2023-11-12 01:02:51,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-12 01:02:51,644 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 10.666666666666666) internal successors, (32), 4 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2023-11-12 01:02:51,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 01:02:51,646 INFO L225 Difference]: With dead ends: 325 [2023-11-12 01:02:51,646 INFO L226 Difference]: Without dead ends: 325 [2023-11-12 01:02:51,647 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-12 01:02:51,647 INFO L413 NwaCegarLoop]: 148 mSDtfsCounter, 176 mSDsluCounter, 151 mSDsCounter, 0 mSdLazyCounter, 266 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 178 SdHoareTripleChecker+Valid, 299 SdHoareTripleChecker+Invalid, 274 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 266 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-12 01:02:51,647 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [178 Valid, 299 Invalid, 274 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 266 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-12 01:02:51,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 325 states. [2023-11-12 01:02:51,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 325 to 273. [2023-11-12 01:02:51,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 273 states, 177 states have (on average 1.694915254237288) internal successors, (300), 270 states have internal predecessors, (300), 12 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-12 01:02:51,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 273 states to 273 states and 314 transitions. [2023-11-12 01:02:51,657 INFO L78 Accepts]: Start accepts. Automaton has 273 states and 314 transitions. Word has length 33 [2023-11-12 01:02:51,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 01:02:51,657 INFO L495 AbstractCegarLoop]: Abstraction has 273 states and 314 transitions. [2023-11-12 01:02:51,657 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 10.666666666666666) internal successors, (32), 4 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 01:02:51,657 INFO L276 IsEmpty]: Start isEmpty. Operand 273 states and 314 transitions. [2023-11-12 01:02:51,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2023-11-12 01:02:51,658 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 01:02:51,658 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 01:02:51,658 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2023-11-12 01:02:51,659 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr68REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [failErr0ASSERT_VIOLATIONMEMORY_LEAK, merge_single_nodeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, merge_single_nodeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 102 more)] === [2023-11-12 01:02:51,659 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 01:02:51,659 INFO L85 PathProgramCache]: Analyzing trace with hash 1065266, now seen corresponding path program 1 times [2023-11-12 01:02:51,659 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 01:02:51,659 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [350989694] [2023-11-12 01:02:51,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 01:02:51,660 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 01:02:51,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 01:02:51,810 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 01:02:51,810 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 01:02:51,810 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [350989694] [2023-11-12 01:02:51,811 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [350989694] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 01:02:51,811 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 01:02:51,811 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-12 01:02:51,811 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [66660050] [2023-11-12 01:02:51,811 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 01:02:51,812 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-12 01:02:51,812 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 01:02:51,812 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-12 01:02:51,812 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-12 01:02:51,813 INFO L87 Difference]: Start difference. First operand 273 states and 314 transitions. Second operand has 5 states, 4 states have (on average 8.25) internal successors, (33), 5 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 01:02:52,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 01:02:52,263 INFO L93 Difference]: Finished difference Result 302 states and 334 transitions. [2023-11-12 01:02:52,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-12 01:02:52,264 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 8.25) internal successors, (33), 5 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2023-11-12 01:02:52,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 01:02:52,266 INFO L225 Difference]: With dead ends: 302 [2023-11-12 01:02:52,266 INFO L226 Difference]: Without dead ends: 302 [2023-11-12 01:02:52,266 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-11-12 01:02:52,267 INFO L413 NwaCegarLoop]: 157 mSDtfsCounter, 115 mSDsluCounter, 303 mSDsCounter, 0 mSdLazyCounter, 405 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 115 SdHoareTripleChecker+Valid, 460 SdHoareTripleChecker+Invalid, 409 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 405 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-12 01:02:52,267 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [115 Valid, 460 Invalid, 409 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 405 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-12 01:02:52,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 302 states. [2023-11-12 01:02:52,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 302 to 273. [2023-11-12 01:02:52,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 273 states, 177 states have (on average 1.6779661016949152) internal successors, (297), 270 states have internal predecessors, (297), 12 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-12 01:02:52,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 273 states to 273 states and 311 transitions. [2023-11-12 01:02:52,276 INFO L78 Accepts]: Start accepts. Automaton has 273 states and 311 transitions. Word has length 33 [2023-11-12 01:02:52,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 01:02:52,277 INFO L495 AbstractCegarLoop]: Abstraction has 273 states and 311 transitions. [2023-11-12 01:02:52,277 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 8.25) internal successors, (33), 5 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 01:02:52,277 INFO L276 IsEmpty]: Start isEmpty. Operand 273 states and 311 transitions. [2023-11-12 01:02:52,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2023-11-12 01:02:52,278 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 01:02:52,278 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 01:02:52,278 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2023-11-12 01:02:52,278 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [failErr0ASSERT_VIOLATIONMEMORY_LEAK, merge_single_nodeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, merge_single_nodeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 102 more)] === [2023-11-12 01:02:52,279 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 01:02:52,279 INFO L85 PathProgramCache]: Analyzing trace with hash 646191216, now seen corresponding path program 2 times [2023-11-12 01:02:52,279 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 01:02:52,279 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1279084087] [2023-11-12 01:02:52,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 01:02:52,280 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 01:02:52,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 01:02:52,903 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 01:02:52,903 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 01:02:52,903 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1279084087] [2023-11-12 01:02:52,904 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1279084087] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 01:02:52,904 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [880438784] [2023-11-12 01:02:52,904 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-12 01:02:52,904 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 01:02:52,904 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f4415f5-109d-4842-a95f-f8a92e4fddac/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 01:02:52,911 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f4415f5-109d-4842-a95f-f8a92e4fddac/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 01:02:52,934 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f4415f5-109d-4842-a95f-f8a92e4fddac/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-12 01:02:53,106 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-11-12 01:02:53,106 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-12 01:02:53,109 INFO L262 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 34 conjunts are in the unsatisfiable core [2023-11-12 01:02:53,112 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 01:02:53,117 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 [2023-11-12 01:02:53,153 INFO L322 Elim1Store]: treesize reduction 20, result has 33.3 percent of original size [2023-11-12 01:02:53,153 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 16 [2023-11-12 01:02:53,176 INFO L322 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2023-11-12 01:02:53,177 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 [2023-11-12 01:02:53,219 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-12 01:02:53,441 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2023-11-12 01:02:53,461 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 10 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 01:02:53,461 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 01:02:53,615 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2023-11-12 01:02:53,628 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 24 treesize of output 20 [2023-11-12 01:02:53,824 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 01:02:53,825 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [880438784] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 01:02:53,825 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1944940755] [2023-11-12 01:02:53,828 INFO L159 IcfgInterpreter]: Started Sifa with 26 locations of interest [2023-11-12 01:02:53,828 INFO L166 IcfgInterpreter]: Building call graph [2023-11-12 01:02:53,828 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-12 01:02:53,829 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-12 01:02:53,829 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-12 01:02:59,836 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-12 01:03:04,425 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '15339#(and (<= 1 |#StackHeapBarrier|) (not (= (select |#valid| |ULTIMATE.start_inspect_before_~shape#1.base|) 1)) (= 0 |ULTIMATE.start_main_~data~0#1.offset|) (or (exists ((|v_ULTIMATE.start_inspect_before_~shape#1.offset_40| Int) (|v_ULTIMATE.start_inspect_before_~shape#1.base_49| Int)) (and (= (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_inspect_before_~shape#1.base_49|) (+ |v_ULTIMATE.start_inspect_before_~shape#1.offset_40| 4)) |ULTIMATE.start_inspect_before_~shape#1.offset|) (= |ULTIMATE.start_inspect_before_~shape#1.base| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_inspect_before_~shape#1.base_49|) (+ |v_ULTIMATE.start_inspect_before_~shape#1.offset_40| 4))) (= (select |#valid| |v_ULTIMATE.start_inspect_before_~shape#1.base_49|) 1) (<= (+ |v_ULTIMATE.start_inspect_before_~shape#1.offset_40| 8) (select |#length| |v_ULTIMATE.start_inspect_before_~shape#1.base_49|)) (<= 0 |v_ULTIMATE.start_inspect_before_~shape#1.offset_40|))) (and (= |ULTIMATE.start_inspect_before_~shape#1.base| |ULTIMATE.start_inspect_before_#in~shape#1.base|) (= |ULTIMATE.start_main_~data~0#1.base| |ULTIMATE.start_inspect_before_#in~shape#1.base|) (= 0 |ULTIMATE.start_inspect_before_~shape#1.offset|) (not (= |ULTIMATE.start_inspect_before_~shape#1.base| 0)))) (= |ULTIMATE.start_inspect_before_#in~shape#1.offset| 0))' at error location [2023-11-12 01:03:04,425 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-12 01:03:04,426 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 01:03:04,426 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 9] total 20 [2023-11-12 01:03:04,426 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1770570921] [2023-11-12 01:03:04,426 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 01:03:04,427 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-11-12 01:03:04,427 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 01:03:04,428 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-11-12 01:03:04,429 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=1392, Unknown=2, NotChecked=0, Total=1560 [2023-11-12 01:03:04,429 INFO L87 Difference]: Start difference. First operand 273 states and 311 transitions. Second operand has 21 states, 20 states have (on average 4.45) internal successors, (89), 21 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 01:03:06,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 01:03:06,026 INFO L93 Difference]: Finished difference Result 390 states and 442 transitions. [2023-11-12 01:03:06,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-12 01:03:06,027 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 4.45) internal successors, (89), 21 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2023-11-12 01:03:06,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 01:03:06,029 INFO L225 Difference]: With dead ends: 390 [2023-11-12 01:03:06,029 INFO L226 Difference]: Without dead ends: 390 [2023-11-12 01:03:06,030 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 71 SyntacticMatches, 3 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 650 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=232, Invalid=1928, Unknown=2, NotChecked=0, Total=2162 [2023-11-12 01:03:06,031 INFO L413 NwaCegarLoop]: 180 mSDtfsCounter, 791 mSDsluCounter, 1420 mSDsCounter, 0 mSdLazyCounter, 1716 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 793 SdHoareTripleChecker+Valid, 1600 SdHoareTripleChecker+Invalid, 1738 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 1716 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2023-11-12 01:03:06,031 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [793 Valid, 1600 Invalid, 1738 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 1716 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2023-11-12 01:03:06,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 390 states. [2023-11-12 01:03:06,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 390 to 274. [2023-11-12 01:03:06,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 274 states, 178 states have (on average 1.6797752808988764) internal successors, (299), 271 states have internal predecessors, (299), 12 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-12 01:03:06,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 274 states to 274 states and 313 transitions. [2023-11-12 01:03:06,040 INFO L78 Accepts]: Start accepts. Automaton has 274 states and 313 transitions. Word has length 34 [2023-11-12 01:03:06,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 01:03:06,041 INFO L495 AbstractCegarLoop]: Abstraction has 274 states and 313 transitions. [2023-11-12 01:03:06,041 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 4.45) internal successors, (89), 21 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 01:03:06,041 INFO L276 IsEmpty]: Start isEmpty. Operand 274 states and 313 transitions. [2023-11-12 01:03:06,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2023-11-12 01:03:06,042 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 01:03:06,042 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 01:03:06,053 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f4415f5-109d-4842-a95f-f8a92e4fddac/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-11-12 01:03:06,249 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f4415f5-109d-4842-a95f-f8a92e4fddac/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2023-11-12 01:03:06,249 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [failErr0ASSERT_VIOLATIONMEMORY_LEAK, merge_single_nodeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, merge_single_nodeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 102 more)] === [2023-11-12 01:03:06,250 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 01:03:06,250 INFO L85 PathProgramCache]: Analyzing trace with hash 646191217, now seen corresponding path program 1 times [2023-11-12 01:03:06,250 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 01:03:06,251 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [107593480] [2023-11-12 01:03:06,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 01:03:06,251 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 01:03:06,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 01:03:07,120 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 01:03:07,120 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 01:03:07,120 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [107593480] [2023-11-12 01:03:07,120 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [107593480] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 01:03:07,120 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1430244807] [2023-11-12 01:03:07,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 01:03:07,121 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 01:03:07,121 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f4415f5-109d-4842-a95f-f8a92e4fddac/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 01:03:07,123 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f4415f5-109d-4842-a95f-f8a92e4fddac/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 01:03:07,146 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f4415f5-109d-4842-a95f-f8a92e4fddac/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-12 01:03:07,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 01:03:07,307 INFO L262 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 51 conjunts are in the unsatisfiable core [2023-11-12 01:03:07,312 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 01:03:07,318 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 [2023-11-12 01:03:07,391 INFO L322 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2023-11-12 01:03:07,391 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 [2023-11-12 01:03:07,416 INFO L322 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2023-11-12 01:03:07,417 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2023-11-12 01:03:07,482 INFO L322 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2023-11-12 01:03:07,483 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 1 case distinctions, treesize of input 14 treesize of output 13 [2023-11-12 01:03:07,511 INFO L322 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2023-11-12 01:03:07,515 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 18 [2023-11-12 01:03:07,564 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-12 01:03:07,623 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 20 [2023-11-12 01:03:07,636 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7