./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/list-simple/dll2c_insert_equal.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 0e0057cc 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_b62b4a07-e63f-4215-baf5-c7486d71be4e/bin/utaipan-verify-SwPr7d2a91/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b62b4a07-e63f-4215-baf5-c7486d71be4e/bin/utaipan-verify-SwPr7d2a91/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b62b4a07-e63f-4215-baf5-c7486d71be4e/bin/utaipan-verify-SwPr7d2a91/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b62b4a07-e63f-4215-baf5-c7486d71be4e/bin/utaipan-verify-SwPr7d2a91/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/list-simple/dll2c_insert_equal.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b62b4a07-e63f-4215-baf5-c7486d71be4e/bin/utaipan-verify-SwPr7d2a91/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b62b4a07-e63f-4215-baf5-c7486d71be4e/bin/utaipan-verify-SwPr7d2a91 --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 535caea86e22f289c2fcb0364594f5e7b1dfaabfa814e56099346e6a240c0067 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-25 00:09:58,039 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-25 00:09:58,162 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b62b4a07-e63f-4215-baf5-c7486d71be4e/bin/utaipan-verify-SwPr7d2a91/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2023-11-25 00:09:58,173 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-25 00:09:58,173 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-25 00:09:58,215 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-25 00:09:58,216 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-25 00:09:58,217 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-25 00:09:58,218 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-25 00:09:58,222 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-25 00:09:58,223 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-25 00:09:58,223 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-25 00:09:58,224 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-25 00:09:58,225 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-25 00:09:58,226 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-25 00:09:58,226 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-25 00:09:58,226 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-25 00:09:58,227 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-25 00:09:58,227 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-25 00:09:58,228 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-25 00:09:58,228 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-25 00:09:58,229 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-25 00:09:58,229 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-25 00:09:58,230 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-25 00:09:58,231 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-25 00:09:58,231 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-25 00:09:58,231 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-25 00:09:58,232 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-25 00:09:58,232 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-25 00:09:58,233 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-11-25 00:09:58,234 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-11-25 00:09:58,235 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-11-25 00:09:58,235 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-25 00:09:58,235 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-25 00:09:58,236 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-25 00:09:58,236 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-25 00:09:58,236 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-25 00:09:58,236 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-25 00:09:58,236 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-25 00:09:58,237 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-25 00:09:58,237 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-25 00:09:58,237 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-25 00:09:58,238 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-25 00:09:58,238 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-25 00:09:58,238 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-25 00:09:58,239 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-25 00:09:58,239 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-25 00:09:58,239 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-25 00:09:58,239 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_b62b4a07-e63f-4215-baf5-c7486d71be4e/bin/utaipan-verify-SwPr7d2a91/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b62b4a07-e63f-4215-baf5-c7486d71be4e/bin/utaipan-verify-SwPr7d2a91 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 535caea86e22f289c2fcb0364594f5e7b1dfaabfa814e56099346e6a240c0067 [2023-11-25 00:09:58,550 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-25 00:09:58,583 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-25 00:09:58,586 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-25 00:09:58,588 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-25 00:09:58,588 INFO L274 PluginConnector]: CDTParser initialized [2023-11-25 00:09:58,590 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b62b4a07-e63f-4215-baf5-c7486d71be4e/bin/utaipan-verify-SwPr7d2a91/../../sv-benchmarks/c/list-simple/dll2c_insert_equal.i [2023-11-25 00:10:01,884 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-25 00:10:02,159 INFO L384 CDTParser]: Found 1 translation units. [2023-11-25 00:10:02,160 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b62b4a07-e63f-4215-baf5-c7486d71be4e/sv-benchmarks/c/list-simple/dll2c_insert_equal.i [2023-11-25 00:10:02,194 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b62b4a07-e63f-4215-baf5-c7486d71be4e/bin/utaipan-verify-SwPr7d2a91/data/609c94c97/aa5f97c21432479c819bbd41a89b8a14/FLAG97176ae3a [2023-11-25 00:10:02,211 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b62b4a07-e63f-4215-baf5-c7486d71be4e/bin/utaipan-verify-SwPr7d2a91/data/609c94c97/aa5f97c21432479c819bbd41a89b8a14 [2023-11-25 00:10:02,215 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-25 00:10:02,217 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-25 00:10:02,226 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-25 00:10:02,226 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-25 00:10:02,232 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-25 00:10:02,233 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 12:10:02" (1/1) ... [2023-11-25 00:10:02,234 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2a6150fc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:10:02, skipping insertion in model container [2023-11-25 00:10:02,235 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 12:10:02" (1/1) ... [2023-11-25 00:10:02,282 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-25 00:10:02,649 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-25 00:10:02,667 INFO L202 MainTranslator]: Completed pre-run [2023-11-25 00:10:02,754 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-25 00:10:02,792 INFO L206 MainTranslator]: Completed translation [2023-11-25 00:10:02,792 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:10:02 WrapperNode [2023-11-25 00:10:02,793 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-25 00:10:02,794 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-25 00:10:02,794 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-25 00:10:02,794 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-25 00:10:02,802 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:10:02" (1/1) ... [2023-11-25 00:10:02,838 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:10:02" (1/1) ... [2023-11-25 00:10:02,883 INFO L138 Inliner]: procedures = 127, calls = 54, calls flagged for inlining = 7, calls inlined = 7, statements flattened = 165 [2023-11-25 00:10:02,884 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-25 00:10:02,884 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-25 00:10:02,885 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-25 00:10:02,885 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-25 00:10:02,895 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:10:02" (1/1) ... [2023-11-25 00:10:02,896 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:10:02" (1/1) ... [2023-11-25 00:10:02,915 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:10:02" (1/1) ... [2023-11-25 00:10:02,921 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:10:02" (1/1) ... [2023-11-25 00:10:02,931 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:10:02" (1/1) ... [2023-11-25 00:10:02,941 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:10:02" (1/1) ... [2023-11-25 00:10:02,946 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:10:02" (1/1) ... [2023-11-25 00:10:02,954 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:10:02" (1/1) ... [2023-11-25 00:10:02,958 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-25 00:10:02,961 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-25 00:10:02,961 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-25 00:10:02,962 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-25 00:10:02,976 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:10:02" (1/1) ... [2023-11-25 00:10:02,988 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-25 00:10:03,003 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b62b4a07-e63f-4215-baf5-c7486d71be4e/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-25 00:10:03,019 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b62b4a07-e63f-4215-baf5-c7486d71be4e/bin/utaipan-verify-SwPr7d2a91/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-25 00:10:03,046 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b62b4a07-e63f-4215-baf5-c7486d71be4e/bin/utaipan-verify-SwPr7d2a91/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-25 00:10:03,081 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-25 00:10:03,082 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-25 00:10:03,082 INFO L130 BoogieDeclarations]: Found specification of procedure node_create [2023-11-25 00:10:03,083 INFO L138 BoogieDeclarations]: Found implementation of procedure node_create [2023-11-25 00:10:03,083 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-25 00:10:03,083 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-25 00:10:03,085 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-25 00:10:03,085 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-11-25 00:10:03,086 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-11-25 00:10:03,086 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-25 00:10:03,087 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2023-11-25 00:10:03,087 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-25 00:10:03,087 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-25 00:10:03,087 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-25 00:10:03,282 INFO L241 CfgBuilder]: Building ICFG [2023-11-25 00:10:03,285 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-25 00:10:03,932 INFO L282 CfgBuilder]: Performing block encoding [2023-11-25 00:10:03,993 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-25 00:10:03,993 INFO L309 CfgBuilder]: Removed 4 assume(true) statements. [2023-11-25 00:10:03,995 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 12:10:03 BoogieIcfgContainer [2023-11-25 00:10:03,995 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-25 00:10:03,998 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-25 00:10:03,998 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-25 00:10:04,002 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-25 00:10:04,003 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 12:10:02" (1/3) ... [2023-11-25 00:10:04,004 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4d1ac571 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 12:10:04, skipping insertion in model container [2023-11-25 00:10:04,004 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:10:02" (2/3) ... [2023-11-25 00:10:04,005 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4d1ac571 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 12:10:04, skipping insertion in model container [2023-11-25 00:10:04,005 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 12:10:03" (3/3) ... [2023-11-25 00:10:04,006 INFO L112 eAbstractionObserver]: Analyzing ICFG dll2c_insert_equal.i [2023-11-25 00:10:04,028 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-25 00:10:04,029 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 72 error locations. [2023-11-25 00:10:04,091 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-25 00:10:04,098 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;@5fe12392, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-25 00:10:04,098 INFO L358 AbstractCegarLoop]: Starting to check reachability of 72 error locations. [2023-11-25 00:10:04,103 INFO L276 IsEmpty]: Start isEmpty. Operand has 140 states, 63 states have (on average 2.3492063492063493) internal successors, (148), 135 states have internal predecessors, (148), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-25 00:10:04,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2023-11-25 00:10:04,109 INFO L187 NwaCegarLoop]: Found error trace [2023-11-25 00:10:04,110 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2023-11-25 00:10:04,111 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting node_createErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 69 more)] === [2023-11-25 00:10:04,117 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-25 00:10:04,117 INFO L85 PathProgramCache]: Analyzing trace with hash 275251153, now seen corresponding path program 1 times [2023-11-25 00:10:04,128 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-25 00:10:04,129 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [928840169] [2023-11-25 00:10:04,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-25 00:10:04,130 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-25 00:10:04,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-25 00:10:04,426 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-25 00:10:04,427 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-25 00:10:04,428 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [928840169] [2023-11-25 00:10:04,429 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [928840169] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-25 00:10:04,429 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-25 00:10:04,429 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-25 00:10:04,431 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [67418312] [2023-11-25 00:10:04,432 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-25 00:10:04,437 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-25 00:10:04,437 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-25 00:10:04,469 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-25 00:10:04,469 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-25 00:10:04,472 INFO L87 Difference]: Start difference. First operand has 140 states, 63 states have (on average 2.3492063492063493) internal successors, (148), 135 states have internal predecessors, (148), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-25 00:10:04,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-25 00:10:04,702 INFO L93 Difference]: Finished difference Result 136 states and 147 transitions. [2023-11-25 00:10:04,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-25 00:10:04,705 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2023-11-25 00:10:04,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-25 00:10:04,719 INFO L225 Difference]: With dead ends: 136 [2023-11-25 00:10:04,719 INFO L226 Difference]: Without dead ends: 134 [2023-11-25 00:10:04,721 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 [2023-11-25 00:10:04,728 INFO L413 NwaCegarLoop]: 122 mSDtfsCounter, 8 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 97 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 187 SdHoareTripleChecker+Invalid, 99 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 97 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-25 00:10:04,730 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 187 Invalid, 99 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 97 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-25 00:10:04,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2023-11-25 00:10:04,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 134. [2023-11-25 00:10:04,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 61 states have (on average 2.262295081967213) internal successors, (138), 129 states have internal predecessors, (138), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-25 00:10:04,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 144 transitions. [2023-11-25 00:10:04,778 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 144 transitions. Word has length 5 [2023-11-25 00:10:04,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-25 00:10:04,779 INFO L495 AbstractCegarLoop]: Abstraction has 134 states and 144 transitions. [2023-11-25 00:10:04,779 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-25 00:10:04,779 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 144 transitions. [2023-11-25 00:10:04,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2023-11-25 00:10:04,780 INFO L187 NwaCegarLoop]: Found error trace [2023-11-25 00:10:04,780 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2023-11-25 00:10:04,780 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-25 00:10:04,781 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting node_createErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 69 more)] === [2023-11-25 00:10:04,781 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-25 00:10:04,782 INFO L85 PathProgramCache]: Analyzing trace with hash 275251154, now seen corresponding path program 1 times [2023-11-25 00:10:04,782 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-25 00:10:04,782 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [759746281] [2023-11-25 00:10:04,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-25 00:10:04,783 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-25 00:10:04,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-25 00:10:04,906 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-25 00:10:04,907 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-25 00:10:04,912 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [759746281] [2023-11-25 00:10:04,913 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [759746281] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-25 00:10:04,913 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-25 00:10:04,913 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-25 00:10:04,914 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1489403593] [2023-11-25 00:10:04,914 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-25 00:10:04,915 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-25 00:10:04,915 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-25 00:10:04,916 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-25 00:10:04,916 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-25 00:10:04,917 INFO L87 Difference]: Start difference. First operand 134 states and 144 transitions. Second operand has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-25 00:10:05,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-25 00:10:05,097 INFO L93 Difference]: Finished difference Result 131 states and 141 transitions. [2023-11-25 00:10:05,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-25 00:10:05,097 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2023-11-25 00:10:05,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-25 00:10:05,105 INFO L225 Difference]: With dead ends: 131 [2023-11-25 00:10:05,105 INFO L226 Difference]: Without dead ends: 131 [2023-11-25 00:10:05,106 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 [2023-11-25 00:10:05,109 INFO L413 NwaCegarLoop]: 121 mSDtfsCounter, 3 mSDsluCounter, 71 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 192 SdHoareTripleChecker+Invalid, 87 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-25 00:10:05,112 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 192 Invalid, 87 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 85 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-25 00:10:05,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2023-11-25 00:10:05,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 131. [2023-11-25 00:10:05,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 61 states have (on average 2.2131147540983607) internal successors, (135), 126 states have internal predecessors, (135), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-25 00:10:05,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 141 transitions. [2023-11-25 00:10:05,138 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 141 transitions. Word has length 5 [2023-11-25 00:10:05,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-25 00:10:05,139 INFO L495 AbstractCegarLoop]: Abstraction has 131 states and 141 transitions. [2023-11-25 00:10:05,139 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-25 00:10:05,139 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 141 transitions. [2023-11-25 00:10:05,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-11-25 00:10:05,141 INFO L187 NwaCegarLoop]: Found error trace [2023-11-25 00:10:05,141 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-25 00:10:05,142 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-25 00:10:05,142 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 69 more)] === [2023-11-25 00:10:05,143 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-25 00:10:05,143 INFO L85 PathProgramCache]: Analyzing trace with hash -741544138, now seen corresponding path program 1 times [2023-11-25 00:10:05,144 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-25 00:10:05,144 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [116094832] [2023-11-25 00:10:05,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-25 00:10:05,146 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-25 00:10:05,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-25 00:10:05,432 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-25 00:10:05,432 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-25 00:10:05,432 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [116094832] [2023-11-25 00:10:05,433 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [116094832] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-25 00:10:05,433 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-25 00:10:05,433 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-25 00:10:05,434 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1791796868] [2023-11-25 00:10:05,434 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-25 00:10:05,435 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-25 00:10:05,436 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-25 00:10:05,438 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-25 00:10:05,442 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-25 00:10:05,443 INFO L87 Difference]: Start difference. First operand 131 states and 141 transitions. Second operand has 6 states, 4 states have (on average 2.25) internal successors, (9), 5 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-25 00:10:05,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-25 00:10:05,762 INFO L93 Difference]: Finished difference Result 135 states and 147 transitions. [2023-11-25 00:10:05,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-25 00:10:05,763 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 4 states have (on average 2.25) internal successors, (9), 5 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2023-11-25 00:10:05,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-25 00:10:05,765 INFO L225 Difference]: With dead ends: 135 [2023-11-25 00:10:05,766 INFO L226 Difference]: Without dead ends: 135 [2023-11-25 00:10:05,766 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-11-25 00:10:05,768 INFO L413 NwaCegarLoop]: 117 mSDtfsCounter, 7 mSDsluCounter, 247 mSDsCounter, 0 mSdLazyCounter, 330 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 364 SdHoareTripleChecker+Invalid, 332 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 330 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-25 00:10:05,768 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 364 Invalid, 332 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 330 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-25 00:10:05,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2023-11-25 00:10:05,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 133. [2023-11-25 00:10:05,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 63 states have (on average 2.2063492063492065) internal successors, (139), 128 states have internal predecessors, (139), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-25 00:10:05,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 145 transitions. [2023-11-25 00:10:05,783 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 145 transitions. Word has length 11 [2023-11-25 00:10:05,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-25 00:10:05,783 INFO L495 AbstractCegarLoop]: Abstraction has 133 states and 145 transitions. [2023-11-25 00:10:05,784 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 4 states have (on average 2.25) internal successors, (9), 5 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-25 00:10:05,784 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 145 transitions. [2023-11-25 00:10:05,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-11-25 00:10:05,784 INFO L187 NwaCegarLoop]: Found error trace [2023-11-25 00:10:05,785 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-25 00:10:05,785 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-25 00:10:05,785 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 69 more)] === [2023-11-25 00:10:05,785 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-25 00:10:05,786 INFO L85 PathProgramCache]: Analyzing trace with hash -741544137, now seen corresponding path program 1 times [2023-11-25 00:10:05,786 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-25 00:10:05,786 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [410655056] [2023-11-25 00:10:05,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-25 00:10:05,786 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-25 00:10:05,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-25 00:10:05,850 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-25 00:10:05,850 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-25 00:10:05,851 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [410655056] [2023-11-25 00:10:05,851 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [410655056] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-25 00:10:05,851 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-25 00:10:05,851 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-25 00:10:05,852 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [201538282] [2023-11-25 00:10:05,852 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-25 00:10:05,852 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-25 00:10:05,853 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-25 00:10:05,853 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-25 00:10:05,853 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-25 00:10:05,854 INFO L87 Difference]: Start difference. First operand 133 states and 145 transitions. Second operand has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-25 00:10:05,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-25 00:10:05,899 INFO L93 Difference]: Finished difference Result 132 states and 142 transitions. [2023-11-25 00:10:05,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-25 00:10:05,900 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2023-11-25 00:10:05,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-25 00:10:05,901 INFO L225 Difference]: With dead ends: 132 [2023-11-25 00:10:05,901 INFO L226 Difference]: Without dead ends: 132 [2023-11-25 00:10:05,902 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-25 00:10:05,904 INFO L413 NwaCegarLoop]: 122 mSDtfsCounter, 10 mSDsluCounter, 110 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 232 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-25 00:10:05,905 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 232 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-25 00:10:05,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2023-11-25 00:10:05,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 132. [2023-11-25 00:10:05,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132 states, 62 states have (on average 2.193548387096774) internal successors, (136), 127 states have internal predecessors, (136), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-25 00:10:05,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 142 transitions. [2023-11-25 00:10:05,915 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 142 transitions. Word has length 11 [2023-11-25 00:10:05,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-25 00:10:05,915 INFO L495 AbstractCegarLoop]: Abstraction has 132 states and 142 transitions. [2023-11-25 00:10:05,916 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-25 00:10:05,916 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 142 transitions. [2023-11-25 00:10:05,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-11-25 00:10:05,917 INFO L187 NwaCegarLoop]: Found error trace [2023-11-25 00:10:05,917 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-25 00:10:05,917 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-25 00:10:05,917 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 69 more)] === [2023-11-25 00:10:05,918 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-25 00:10:05,918 INFO L85 PathProgramCache]: Analyzing trace with hash 226617439, now seen corresponding path program 1 times [2023-11-25 00:10:05,919 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-25 00:10:05,919 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1960533928] [2023-11-25 00:10:05,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-25 00:10:05,919 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-25 00:10:05,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-25 00:10:06,092 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-25 00:10:06,092 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-25 00:10:06,092 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1960533928] [2023-11-25 00:10:06,092 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1960533928] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-25 00:10:06,093 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-25 00:10:06,093 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-25 00:10:06,093 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [357943726] [2023-11-25 00:10:06,093 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-25 00:10:06,095 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-25 00:10:06,096 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-25 00:10:06,096 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-25 00:10:06,097 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-25 00:10:06,097 INFO L87 Difference]: Start difference. First operand 132 states and 142 transitions. Second operand has 6 states, 4 states have (on average 3.25) internal successors, (13), 5 states have internal predecessors, (13), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-25 00:10:06,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-25 00:10:06,387 INFO L93 Difference]: Finished difference Result 131 states and 141 transitions. [2023-11-25 00:10:06,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-25 00:10:06,388 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 4 states have (on average 3.25) internal successors, (13), 5 states have internal predecessors, (13), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 19 [2023-11-25 00:10:06,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-25 00:10:06,389 INFO L225 Difference]: With dead ends: 131 [2023-11-25 00:10:06,389 INFO L226 Difference]: Without dead ends: 131 [2023-11-25 00:10:06,389 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-11-25 00:10:06,390 INFO L413 NwaCegarLoop]: 114 mSDtfsCounter, 9 mSDsluCounter, 245 mSDsCounter, 0 mSdLazyCounter, 326 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 359 SdHoareTripleChecker+Invalid, 327 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 326 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-25 00:10:06,391 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 359 Invalid, 327 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 326 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-25 00:10:06,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2023-11-25 00:10:06,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 131. [2023-11-25 00:10:06,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 62 states have (on average 2.1774193548387095) internal successors, (135), 126 states have internal predecessors, (135), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-25 00:10:06,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 141 transitions. [2023-11-25 00:10:06,399 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 141 transitions. Word has length 19 [2023-11-25 00:10:06,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-25 00:10:06,399 INFO L495 AbstractCegarLoop]: Abstraction has 131 states and 141 transitions. [2023-11-25 00:10:06,399 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 4 states have (on average 3.25) internal successors, (13), 5 states have internal predecessors, (13), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-25 00:10:06,400 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 141 transitions. [2023-11-25 00:10:06,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-11-25 00:10:06,400 INFO L187 NwaCegarLoop]: Found error trace [2023-11-25 00:10:06,400 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-25 00:10:06,401 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-25 00:10:06,401 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 69 more)] === [2023-11-25 00:10:06,401 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-25 00:10:06,401 INFO L85 PathProgramCache]: Analyzing trace with hash 226617440, now seen corresponding path program 1 times [2023-11-25 00:10:06,402 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-25 00:10:06,402 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [371076555] [2023-11-25 00:10:06,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-25 00:10:06,402 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-25 00:10:06,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-25 00:10:06,645 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-25 00:10:06,645 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-25 00:10:06,646 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [371076555] [2023-11-25 00:10:06,646 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [371076555] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-25 00:10:06,646 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-25 00:10:06,647 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-25 00:10:06,651 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [473859674] [2023-11-25 00:10:06,651 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-25 00:10:06,652 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-25 00:10:06,652 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-25 00:10:06,652 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-25 00:10:06,653 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-25 00:10:06,653 INFO L87 Difference]: Start difference. First operand 131 states and 141 transitions. Second operand has 6 states, 4 states have (on average 3.75) internal successors, (15), 5 states have internal predecessors, (15), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-25 00:10:06,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-25 00:10:06,913 INFO L93 Difference]: Finished difference Result 130 states and 140 transitions. [2023-11-25 00:10:06,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-25 00:10:06,914 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 4 states have (on average 3.75) internal successors, (15), 5 states have internal predecessors, (15), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 19 [2023-11-25 00:10:06,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-25 00:10:06,915 INFO L225 Difference]: With dead ends: 130 [2023-11-25 00:10:06,915 INFO L226 Difference]: Without dead ends: 130 [2023-11-25 00:10:06,915 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-11-25 00:10:06,916 INFO L413 NwaCegarLoop]: 114 mSDtfsCounter, 7 mSDsluCounter, 269 mSDsCounter, 0 mSdLazyCounter, 298 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 383 SdHoareTripleChecker+Invalid, 298 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 298 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-25 00:10:06,916 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 383 Invalid, 298 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 298 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-25 00:10:06,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2023-11-25 00:10:06,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 130. [2023-11-25 00:10:06,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130 states, 62 states have (on average 2.161290322580645) internal successors, (134), 125 states have internal predecessors, (134), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-25 00:10:06,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 140 transitions. [2023-11-25 00:10:06,924 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 140 transitions. Word has length 19 [2023-11-25 00:10:06,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-25 00:10:06,924 INFO L495 AbstractCegarLoop]: Abstraction has 130 states and 140 transitions. [2023-11-25 00:10:06,925 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 4 states have (on average 3.75) internal successors, (15), 5 states have internal predecessors, (15), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-25 00:10:06,925 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 140 transitions. [2023-11-25 00:10:06,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2023-11-25 00:10:06,929 INFO L187 NwaCegarLoop]: Found error trace [2023-11-25 00:10:06,929 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-25 00:10:06,929 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-25 00:10:06,930 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 69 more)] === [2023-11-25 00:10:06,930 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-25 00:10:06,930 INFO L85 PathProgramCache]: Analyzing trace with hash -1263973504, now seen corresponding path program 1 times [2023-11-25 00:10:06,930 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-25 00:10:06,930 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [411669229] [2023-11-25 00:10:06,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-25 00:10:06,931 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-25 00:10:06,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-25 00:10:07,281 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-25 00:10:07,282 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-25 00:10:07,282 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [411669229] [2023-11-25 00:10:07,282 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [411669229] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-25 00:10:07,282 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [802693992] [2023-11-25 00:10:07,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-25 00:10:07,282 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-25 00:10:07,283 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b62b4a07-e63f-4215-baf5-c7486d71be4e/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-25 00:10:07,288 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b62b4a07-e63f-4215-baf5-c7486d71be4e/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-25 00:10:07,296 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b62b4a07-e63f-4215-baf5-c7486d71be4e/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-25 00:10:07,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-25 00:10:07,519 INFO L262 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 21 conjunts are in the unsatisfiable core [2023-11-25 00:10:07,525 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-25 00:10:07,588 INFO L378 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 [2023-11-25 00:10:07,670 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2023-11-25 00:10:07,670 INFO L378 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 [2023-11-25 00:10:07,732 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-25 00:10:07,733 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-25 00:10:08,119 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-25 00:10:08,120 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [802693992] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-25 00:10:08,120 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [146692921] [2023-11-25 00:10:08,144 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2023-11-25 00:10:08,144 INFO L166 IcfgInterpreter]: Building call graph [2023-11-25 00:10:08,149 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-25 00:10:08,155 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-25 00:10:08,156 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-25 00:10:09,972 INFO L197 IcfgInterpreter]: Interpreting procedure node_create with input of size 155 for LOIs [2023-11-25 00:10:10,967 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-25 00:10:29,679 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1900#(and (= (select |#valid| |ULTIMATE.start_dll_circular_create_~new_head~0#1.base|) 1) (<= 1 |#StackHeapBarrier|) (= |ULTIMATE.start_dll_circular_create_#in~data#1| 1) (= |ULTIMATE.start_dll_circular_create_~head~0#1.offset| 0) (= |ULTIMATE.start_dll_circular_create_#in~len#1| 2) (= 2 |ULTIMATE.start_dll_circular_create_~len#1|) (= |ULTIMATE.start_main_~data~0#1| 1) (<= 4 (select |#length| |ULTIMATE.start_dll_circular_create_~new_head~0#1.base|)) (exists ((|v_#memory_$Pointer$.base_121| (Array Int (Array Int Int)))) (= |#memory_$Pointer$.base| (store |v_#memory_$Pointer$.base_121| |ULTIMATE.start_dll_circular_create_~new_head~0#1.base| (store (select |v_#memory_$Pointer$.base_121| |ULTIMATE.start_dll_circular_create_~new_head~0#1.base|) 0 |ULTIMATE.start_dll_circular_create_~head~0#1.base|)))) (exists ((|v_#memory_$Pointer$.offset_121| (Array Int (Array Int Int)))) (= |#memory_$Pointer$.offset| (store |v_#memory_$Pointer$.offset_121| |ULTIMATE.start_dll_circular_create_~new_head~0#1.base| (store (select |v_#memory_$Pointer$.offset_121| |ULTIMATE.start_dll_circular_create_~new_head~0#1.base|) 0 0)))) (= |ULTIMATE.start_main_~#s~0#1.offset| 0) (= |ULTIMATE.start_main_~len~0#1| 2) (= |ULTIMATE.start_dll_circular_create_~last~0#1.offset| 0) (exists ((|v_#memory_int_97| (Array Int (Array Int Int)))) (= |#memory_int| (store |v_#memory_int_97| |ULTIMATE.start_dll_circular_create_~new_head~0#1.base| (store (select |v_#memory_int_97| |ULTIMATE.start_dll_circular_create_~new_head~0#1.base|) 0 (select (select |#memory_int| |ULTIMATE.start_dll_circular_create_~new_head~0#1.base|) 0))))) (not (= |ULTIMATE.start_dll_circular_create_~head~0#1.base| 0)) (= |ULTIMATE.start_dll_circular_create_~new_head~0#1.offset| 0) (<= 2 |ULTIMATE.start_main_~#s~0#1.base|) (not (= (select |#valid| |ULTIMATE.start_dll_circular_create_~head~0#1.base|) 1)) (= |ULTIMATE.start_dll_circular_create_~data#1| 1))' at error location [2023-11-25 00:10:29,679 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-25 00:10:29,679 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-25 00:10:29,679 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 10] total 17 [2023-11-25 00:10:29,680 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1919280661] [2023-11-25 00:10:29,680 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-25 00:10:29,680 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-11-25 00:10:29,681 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-25 00:10:29,681 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-11-25 00:10:29,682 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=793, Unknown=4, NotChecked=0, Total=930 [2023-11-25 00:10:29,683 INFO L87 Difference]: Start difference. First operand 130 states and 140 transitions. Second operand has 18 states, 13 states have (on average 2.230769230769231) internal successors, (29), 13 states have internal predecessors, (29), 2 states have call successors, (3), 3 states have call predecessors, (3), 4 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2023-11-25 00:10:30,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-25 00:10:30,342 INFO L93 Difference]: Finished difference Result 137 states and 149 transitions. [2023-11-25 00:10:30,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-25 00:10:30,343 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 13 states have (on average 2.230769230769231) internal successors, (29), 13 states have internal predecessors, (29), 2 states have call successors, (3), 3 states have call predecessors, (3), 4 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 21 [2023-11-25 00:10:30,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-25 00:10:30,344 INFO L225 Difference]: With dead ends: 137 [2023-11-25 00:10:30,344 INFO L226 Difference]: Without dead ends: 137 [2023-11-25 00:10:30,345 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 266 ImplicationChecksByTransitivity, 19.0s TimeCoverageRelationStatistics Valid=145, Invalid=843, Unknown=4, NotChecked=0, Total=992 [2023-11-25 00:10:30,346 INFO L413 NwaCegarLoop]: 111 mSDtfsCounter, 11 mSDsluCounter, 459 mSDsCounter, 0 mSdLazyCounter, 660 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 570 SdHoareTripleChecker+Invalid, 682 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 660 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-25 00:10:30,347 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 570 Invalid, 682 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 660 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-25 00:10:30,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2023-11-25 00:10:30,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 135. [2023-11-25 00:10:30,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 66 states have (on average 2.121212121212121) internal successors, (140), 129 states have internal predecessors, (140), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-11-25 00:10:30,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 148 transitions. [2023-11-25 00:10:30,355 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 148 transitions. Word has length 21 [2023-11-25 00:10:30,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-25 00:10:30,355 INFO L495 AbstractCegarLoop]: Abstraction has 135 states and 148 transitions. [2023-11-25 00:10:30,356 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 13 states have (on average 2.230769230769231) internal successors, (29), 13 states have internal predecessors, (29), 2 states have call successors, (3), 3 states have call predecessors, (3), 4 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2023-11-25 00:10:30,356 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 148 transitions. [2023-11-25 00:10:30,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2023-11-25 00:10:30,357 INFO L187 NwaCegarLoop]: Found error trace [2023-11-25 00:10:30,357 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-25 00:10:30,364 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b62b4a07-e63f-4215-baf5-c7486d71be4e/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-11-25 00:10:30,564 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b62b4a07-e63f-4215-baf5-c7486d71be4e/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-25 00:10:30,565 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 69 more)] === [2023-11-25 00:10:30,565 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-25 00:10:30,565 INFO L85 PathProgramCache]: Analyzing trace with hash -1263973503, now seen corresponding path program 1 times [2023-11-25 00:10:30,566 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-25 00:10:30,566 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1425508252] [2023-11-25 00:10:30,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-25 00:10:30,566 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-25 00:10:30,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-25 00:10:31,094 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-25 00:10:31,094 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-25 00:10:31,095 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1425508252] [2023-11-25 00:10:31,095 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1425508252] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-25 00:10:31,095 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [371395716] [2023-11-25 00:10:31,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-25 00:10:31,095 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-25 00:10:31,095 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b62b4a07-e63f-4215-baf5-c7486d71be4e/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-25 00:10:31,100 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b62b4a07-e63f-4215-baf5-c7486d71be4e/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-25 00:10:31,109 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b62b4a07-e63f-4215-baf5-c7486d71be4e/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-25 00:10:31,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-25 00:10:31,236 INFO L262 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 32 conjunts are in the unsatisfiable core [2023-11-25 00:10:31,242 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-25 00:10:31,249 INFO L378 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 [2023-11-25 00:10:31,387 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-11-25 00:10:31,388 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2023-11-25 00:10:31,396 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2023-11-25 00:10:31,430 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-25 00:10:31,430 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-25 00:10:31,589 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [371395716] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-25 00:10:31,589 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [595734189] [2023-11-25 00:10:31,593 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2023-11-25 00:10:31,593 INFO L166 IcfgInterpreter]: Building call graph [2023-11-25 00:10:31,593 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-25 00:10:31,594 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-25 00:10:31,594 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-25 00:10:32,561 INFO L197 IcfgInterpreter]: Interpreting procedure node_create with input of size 155 for LOIs [2023-11-25 00:10:33,272 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-25 00:10:51,367 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2278#(and (= (select |#valid| |ULTIMATE.start_dll_circular_create_~new_head~0#1.base|) 1) (<= 1 |#StackHeapBarrier|) (= |ULTIMATE.start_dll_circular_create_#in~data#1| 1) (= |ULTIMATE.start_dll_circular_create_~head~0#1.offset| 0) (<= (select |#length| |ULTIMATE.start_dll_circular_create_~head~0#1.base|) 7) (= |ULTIMATE.start_dll_circular_create_#in~len#1| 2) (= 2 |ULTIMATE.start_dll_circular_create_~len#1|) (= |ULTIMATE.start_main_~data~0#1| 1) (<= 4 (select |#length| |ULTIMATE.start_dll_circular_create_~new_head~0#1.base|)) (= |ULTIMATE.start_main_~#s~0#1.offset| 0) (exists ((|v_#memory_int_111| (Array Int (Array Int Int)))) (= |#memory_int| (store |v_#memory_int_111| |ULTIMATE.start_dll_circular_create_~new_head~0#1.base| (store (select |v_#memory_int_111| |ULTIMATE.start_dll_circular_create_~new_head~0#1.base|) 0 (select (select |#memory_int| |ULTIMATE.start_dll_circular_create_~new_head~0#1.base|) 0))))) (= |ULTIMATE.start_main_~len~0#1| 2) (exists ((|v_#memory_$Pointer$.base_135| (Array Int (Array Int Int)))) (= (store |v_#memory_$Pointer$.base_135| |ULTIMATE.start_dll_circular_create_~new_head~0#1.base| (store (select |v_#memory_$Pointer$.base_135| |ULTIMATE.start_dll_circular_create_~new_head~0#1.base|) 0 |ULTIMATE.start_dll_circular_create_~head~0#1.base|)) |#memory_$Pointer$.base|)) (= |ULTIMATE.start_dll_circular_create_~last~0#1.offset| 0) (not (= |ULTIMATE.start_dll_circular_create_~head~0#1.base| 0)) (= |ULTIMATE.start_dll_circular_create_~new_head~0#1.offset| 0) (<= 2 |ULTIMATE.start_main_~#s~0#1.base|) (exists ((|v_#memory_$Pointer$.offset_135| (Array Int (Array Int Int)))) (= |#memory_$Pointer$.offset| (store |v_#memory_$Pointer$.offset_135| |ULTIMATE.start_dll_circular_create_~new_head~0#1.base| (store (select |v_#memory_$Pointer$.offset_135| |ULTIMATE.start_dll_circular_create_~new_head~0#1.base|) 0 0)))) (= |ULTIMATE.start_dll_circular_create_~data#1| 1))' at error location [2023-11-25 00:10:51,367 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-25 00:10:51,368 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-25 00:10:51,368 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 13 [2023-11-25 00:10:51,368 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [722933951] [2023-11-25 00:10:51,368 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-25 00:10:51,369 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-25 00:10:51,369 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-25 00:10:51,370 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-25 00:10:51,370 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=703, Unknown=8, NotChecked=0, Total=812 [2023-11-25 00:10:51,371 INFO L87 Difference]: Start difference. First operand 135 states and 148 transitions. Second operand has 14 states, 10 states have (on average 2.4) internal successors, (24), 11 states have internal predecessors, (24), 2 states have call successors, (2), 2 states have call predecessors, (2), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2023-11-25 00:10:52,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-25 00:10:52,297 INFO L93 Difference]: Finished difference Result 137 states and 149 transitions. [2023-11-25 00:10:52,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-25 00:10:52,298 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 10 states have (on average 2.4) internal successors, (24), 11 states have internal predecessors, (24), 2 states have call successors, (2), 2 states have call predecessors, (2), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 21 [2023-11-25 00:10:52,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-25 00:10:52,299 INFO L225 Difference]: With dead ends: 137 [2023-11-25 00:10:52,299 INFO L226 Difference]: Without dead ends: 137 [2023-11-25 00:10:52,300 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 18.5s TimeCoverageRelationStatistics Valid=123, Invalid=799, Unknown=8, NotChecked=0, Total=930 [2023-11-25 00:10:52,301 INFO L413 NwaCegarLoop]: 112 mSDtfsCounter, 5 mSDsluCounter, 503 mSDsCounter, 0 mSdLazyCounter, 902 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 615 SdHoareTripleChecker+Invalid, 907 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 902 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-11-25 00:10:52,301 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 615 Invalid, 907 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 902 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-11-25 00:10:52,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2023-11-25 00:10:52,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 135. [2023-11-25 00:10:52,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 66 states have (on average 2.106060606060606) internal successors, (139), 129 states have internal predecessors, (139), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-11-25 00:10:52,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 147 transitions. [2023-11-25 00:10:52,307 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 147 transitions. Word has length 21 [2023-11-25 00:10:52,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-25 00:10:52,308 INFO L495 AbstractCegarLoop]: Abstraction has 135 states and 147 transitions. [2023-11-25 00:10:52,308 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 10 states have (on average 2.4) internal successors, (24), 11 states have internal predecessors, (24), 2 states have call successors, (2), 2 states have call predecessors, (2), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2023-11-25 00:10:52,308 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 147 transitions. [2023-11-25 00:10:52,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2023-11-25 00:10:52,309 INFO L187 NwaCegarLoop]: Found error trace [2023-11-25 00:10:52,309 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-25 00:10:52,324 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b62b4a07-e63f-4215-baf5-c7486d71be4e/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-25 00:10:52,524 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b62b4a07-e63f-4215-baf5-c7486d71be4e/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-25 00:10:52,525 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 69 more)] === [2023-11-25 00:10:52,525 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-25 00:10:52,525 INFO L85 PathProgramCache]: Analyzing trace with hash 797369494, now seen corresponding path program 1 times [2023-11-25 00:10:52,526 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-25 00:10:52,526 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1270104890] [2023-11-25 00:10:52,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-25 00:10:52,526 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-25 00:10:52,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-25 00:10:52,666 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-25 00:10:52,667 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-25 00:10:52,667 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1270104890] [2023-11-25 00:10:52,667 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1270104890] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-25 00:10:52,667 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [295535274] [2023-11-25 00:10:52,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-25 00:10:52,668 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-25 00:10:52,668 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b62b4a07-e63f-4215-baf5-c7486d71be4e/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-25 00:10:52,669 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b62b4a07-e63f-4215-baf5-c7486d71be4e/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-25 00:10:52,680 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b62b4a07-e63f-4215-baf5-c7486d71be4e/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-25 00:10:52,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-25 00:10:52,835 INFO L262 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-25 00:10:52,838 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-25 00:10:52,856 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-25 00:10:52,856 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-25 00:10:52,894 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-25 00:10:52,894 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [295535274] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-25 00:10:52,894 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1794207466] [2023-11-25 00:10:52,897 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2023-11-25 00:10:52,898 INFO L166 IcfgInterpreter]: Building call graph [2023-11-25 00:10:52,898 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-25 00:10:52,898 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-25 00:10:52,898 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-25 00:10:53,753 INFO L197 IcfgInterpreter]: Interpreting procedure node_create with input of size 59 for LOIs [2023-11-25 00:10:53,858 INFO L180 IcfgInterpreter]: Interpretation finished