./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 e7bb482b Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_828e8a66-d2e0-459b-b20e-9d98d253c54e/bin/utaipan-verify-FOvIYxoinp/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_828e8a66-d2e0-459b-b20e-9d98d253c54e/bin/utaipan-verify-FOvIYxoinp/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_828e8a66-d2e0-459b-b20e-9d98d253c54e/bin/utaipan-verify-FOvIYxoinp/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_828e8a66-d2e0-459b-b20e-9d98d253c54e/bin/utaipan-verify-FOvIYxoinp/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/list-simple/dll2c_insert_equal.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_828e8a66-d2e0-459b-b20e-9d98d253c54e/bin/utaipan-verify-FOvIYxoinp/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_828e8a66-d2e0-459b-b20e-9d98d253c54e/bin/utaipan-verify-FOvIYxoinp --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 535caea86e22f289c2fcb0364594f5e7b1dfaabfa814e56099346e6a240c0067 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-e7bb482 [2023-11-06 21:01:34,033 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-06 21:01:34,166 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_828e8a66-d2e0-459b-b20e-9d98d253c54e/bin/utaipan-verify-FOvIYxoinp/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2023-11-06 21:01:34,178 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-06 21:01:34,180 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-06 21:01:34,223 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-06 21:01:34,224 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-06 21:01:34,225 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-06 21:01:34,226 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-06 21:01:34,232 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-06 21:01:34,233 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-06 21:01:34,234 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-06 21:01:34,235 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-06 21:01:34,237 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-06 21:01:34,238 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-06 21:01:34,239 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-06 21:01:34,239 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-06 21:01:34,240 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-06 21:01:34,240 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-06 21:01:34,241 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-06 21:01:34,242 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-06 21:01:34,242 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-06 21:01:34,243 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-06 21:01:34,244 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-06 21:01:34,245 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-06 21:01:34,246 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-06 21:01:34,246 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-06 21:01:34,247 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-06 21:01:34,248 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-06 21:01:34,248 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-11-06 21:01:34,250 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-11-06 21:01:34,250 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-11-06 21:01:34,251 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-06 21:01:34,251 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-06 21:01:34,251 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-06 21:01:34,252 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-06 21:01:34,252 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-06 21:01:34,252 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-06 21:01:34,253 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-06 21:01:34,253 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 21:01:34,254 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-06 21:01:34,254 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-06 21:01:34,255 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-06 21:01:34,255 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-06 21:01:34,256 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-06 21:01:34,256 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-06 21:01:34,256 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_828e8a66-d2e0-459b-b20e-9d98d253c54e/bin/utaipan-verify-FOvIYxoinp/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_828e8a66-d2e0-459b-b20e-9d98d253c54e/bin/utaipan-verify-FOvIYxoinp Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 535caea86e22f289c2fcb0364594f5e7b1dfaabfa814e56099346e6a240c0067 [2023-11-06 21:01:34,566 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-06 21:01:34,589 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-06 21:01:34,592 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-06 21:01:34,593 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-06 21:01:34,594 INFO L274 PluginConnector]: CDTParser initialized [2023-11-06 21:01:34,595 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_828e8a66-d2e0-459b-b20e-9d98d253c54e/bin/utaipan-verify-FOvIYxoinp/../../sv-benchmarks/c/list-simple/dll2c_insert_equal.i [2023-11-06 21:01:37,720 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-06 21:01:38,055 INFO L384 CDTParser]: Found 1 translation units. [2023-11-06 21:01:38,062 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_828e8a66-d2e0-459b-b20e-9d98d253c54e/sv-benchmarks/c/list-simple/dll2c_insert_equal.i [2023-11-06 21:01:38,082 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_828e8a66-d2e0-459b-b20e-9d98d253c54e/bin/utaipan-verify-FOvIYxoinp/data/b2aad54d3/6054e51210194cb581c501ad6daf6252/FLAG420e4f7c8 [2023-11-06 21:01:38,096 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_828e8a66-d2e0-459b-b20e-9d98d253c54e/bin/utaipan-verify-FOvIYxoinp/data/b2aad54d3/6054e51210194cb581c501ad6daf6252 [2023-11-06 21:01:38,099 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-06 21:01:38,101 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-06 21:01:38,108 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-06 21:01:38,108 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-06 21:01:38,120 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-06 21:01:38,121 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 09:01:38" (1/1) ... [2023-11-06 21:01:38,122 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@48841332 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:01:38, skipping insertion in model container [2023-11-06 21:01:38,122 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 09:01:38" (1/1) ... [2023-11-06 21:01:38,189 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-06 21:01:38,520 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 21:01:38,537 INFO L202 MainTranslator]: Completed pre-run [2023-11-06 21:01:38,628 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 21:01:38,661 INFO L206 MainTranslator]: Completed translation [2023-11-06 21:01:38,662 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:01:38 WrapperNode [2023-11-06 21:01:38,662 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-06 21:01:38,663 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-06 21:01:38,664 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-06 21:01:38,664 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-06 21:01:38,672 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:01:38" (1/1) ... [2023-11-06 21:01:38,708 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:01:38" (1/1) ... [2023-11-06 21:01:38,753 INFO L138 Inliner]: procedures = 127, calls = 54, calls flagged for inlining = 7, calls inlined = 7, statements flattened = 165 [2023-11-06 21:01:38,753 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-06 21:01:38,755 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-06 21:01:38,755 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-06 21:01:38,755 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-06 21:01:38,766 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:01:38" (1/1) ... [2023-11-06 21:01:38,767 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:01:38" (1/1) ... [2023-11-06 21:01:38,778 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:01:38" (1/1) ... [2023-11-06 21:01:38,778 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:01:38" (1/1) ... [2023-11-06 21:01:38,804 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:01:38" (1/1) ... [2023-11-06 21:01:38,823 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:01:38" (1/1) ... [2023-11-06 21:01:38,825 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:01:38" (1/1) ... [2023-11-06 21:01:38,827 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:01:38" (1/1) ... [2023-11-06 21:01:38,831 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-06 21:01:38,832 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-06 21:01:38,832 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-06 21:01:38,832 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-06 21:01:38,835 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:01:38" (1/1) ... [2023-11-06 21:01:38,841 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 21:01:38,856 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_828e8a66-d2e0-459b-b20e-9d98d253c54e/bin/utaipan-verify-FOvIYxoinp/z3 [2023-11-06 21:01:38,871 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_828e8a66-d2e0-459b-b20e-9d98d253c54e/bin/utaipan-verify-FOvIYxoinp/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-06 21:01:38,886 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_828e8a66-d2e0-459b-b20e-9d98d253c54e/bin/utaipan-verify-FOvIYxoinp/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-06 21:01:38,920 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-06 21:01:38,920 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-06 21:01:38,921 INFO L130 BoogieDeclarations]: Found specification of procedure node_create [2023-11-06 21:01:38,921 INFO L138 BoogieDeclarations]: Found implementation of procedure node_create [2023-11-06 21:01:38,921 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-06 21:01:38,921 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-06 21:01:38,922 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-06 21:01:38,922 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-11-06 21:01:38,924 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-11-06 21:01:38,924 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-06 21:01:38,925 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2023-11-06 21:01:38,925 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-06 21:01:38,925 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-06 21:01:38,926 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-06 21:01:39,085 INFO L236 CfgBuilder]: Building ICFG [2023-11-06 21:01:39,087 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-06 21:01:39,684 INFO L277 CfgBuilder]: Performing block encoding [2023-11-06 21:01:39,759 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-06 21:01:39,759 INFO L302 CfgBuilder]: Removed 4 assume(true) statements. [2023-11-06 21:01:39,763 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 09:01:39 BoogieIcfgContainer [2023-11-06 21:01:39,764 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-06 21:01:39,768 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-06 21:01:39,769 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-06 21:01:39,772 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-06 21:01:39,773 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 09:01:38" (1/3) ... [2023-11-06 21:01:39,775 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@121c7cff and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 09:01:39, skipping insertion in model container [2023-11-06 21:01:39,776 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:01:38" (2/3) ... [2023-11-06 21:01:39,778 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@121c7cff and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 09:01:39, skipping insertion in model container [2023-11-06 21:01:39,778 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 09:01:39" (3/3) ... [2023-11-06 21:01:39,781 INFO L112 eAbstractionObserver]: Analyzing ICFG dll2c_insert_equal.i [2023-11-06 21:01:39,802 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-06 21:01:39,803 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 72 error locations. [2023-11-06 21:01:39,854 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-06 21:01:39,862 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;@7d23e208, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-06 21:01:39,862 INFO L358 AbstractCegarLoop]: Starting to check reachability of 72 error locations. [2023-11-06 21:01:39,866 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) [2023-11-06 21:01:39,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2023-11-06 21:01:39,872 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:01:39,873 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2023-11-06 21:01:39,874 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)] === [2023-11-06 21:01:39,878 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:01:39,879 INFO L85 PathProgramCache]: Analyzing trace with hash 273404111, now seen corresponding path program 1 times [2023-11-06 21:01:39,890 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-06 21:01:39,891 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1652473585] [2023-11-06 21:01:39,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:01:39,892 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:01:40,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:01:40,133 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:01:40,133 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-06 21:01:40,134 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1652473585] [2023-11-06 21:01:40,134 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1652473585] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 21:01:40,135 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 21:01:40,135 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-06 21:01:40,137 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [570866050] [2023-11-06 21:01:40,138 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 21:01:40,142 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 21:01:40,143 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-06 21:01:40,176 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 21:01:40,176 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 21:01:40,179 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) [2023-11-06 21:01:40,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 21:01:40,440 INFO L93 Difference]: Finished difference Result 136 states and 147 transitions. [2023-11-06 21:01:40,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 21:01:40,443 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2023-11-06 21:01:40,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 21:01:40,455 INFO L225 Difference]: With dead ends: 136 [2023-11-06 21:01:40,455 INFO L226 Difference]: Without dead ends: 134 [2023-11-06 21:01:40,457 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 21:01:40,464 INFO L413 NwaCegarLoop]: 122 mSDtfsCounter, 8 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 97 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s 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 [2023-11-06 21:01:40,465 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] [2023-11-06 21:01:40,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2023-11-06 21:01:40,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 134. [2023-11-06 21:01:40,521 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) [2023-11-06 21:01:40,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 144 transitions. [2023-11-06 21:01:40,535 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 144 transitions. Word has length 5 [2023-11-06 21:01:40,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 21:01:40,536 INFO L495 AbstractCegarLoop]: Abstraction has 134 states and 144 transitions. [2023-11-06 21:01:40,536 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:01:40,536 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 144 transitions. [2023-11-06 21:01:40,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2023-11-06 21:01:40,537 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:01:40,537 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2023-11-06 21:01:40,537 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-06 21:01:40,538 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)] === [2023-11-06 21:01:40,539 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:01:40,539 INFO L85 PathProgramCache]: Analyzing trace with hash 273404112, now seen corresponding path program 1 times [2023-11-06 21:01:40,540 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-06 21:01:40,541 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [79101281] [2023-11-06 21:01:40,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:01:40,541 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:01:40,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:01:40,775 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:01:40,775 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-06 21:01:40,775 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [79101281] [2023-11-06 21:01:40,776 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [79101281] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 21:01:40,776 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 21:01:40,776 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-06 21:01:40,777 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [878032151] [2023-11-06 21:01:40,777 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 21:01:40,778 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 21:01:40,778 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-06 21:01:40,779 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 21:01:40,779 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 21:01:40,780 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) [2023-11-06 21:01:40,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 21:01:40,942 INFO L93 Difference]: Finished difference Result 131 states and 141 transitions. [2023-11-06 21:01:40,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 21:01:40,943 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2023-11-06 21:01:40,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 21:01:40,944 INFO L225 Difference]: With dead ends: 131 [2023-11-06 21:01:40,945 INFO L226 Difference]: Without dead ends: 131 [2023-11-06 21:01:40,945 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 21:01:40,947 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 [2023-11-06 21:01:40,948 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] [2023-11-06 21:01:40,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2023-11-06 21:01:40,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 131. [2023-11-06 21:01:40,957 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) [2023-11-06 21:01:40,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 141 transitions. [2023-11-06 21:01:40,959 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 141 transitions. Word has length 5 [2023-11-06 21:01:40,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 21:01:40,960 INFO L495 AbstractCegarLoop]: Abstraction has 131 states and 141 transitions. [2023-11-06 21:01:40,960 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:01:40,960 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 141 transitions. [2023-11-06 21:01:40,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-11-06 21:01:40,961 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:01:40,961 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:01:40,961 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-06 21:01:40,962 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)] === [2023-11-06 21:01:40,962 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:01:40,962 INFO L85 PathProgramCache]: Analyzing trace with hash -1450920405, now seen corresponding path program 1 times [2023-11-06 21:01:40,963 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-06 21:01:40,963 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [460851656] [2023-11-06 21:01:40,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:01:40,964 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:01:40,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:01:41,182 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:01:41,183 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-06 21:01:41,183 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [460851656] [2023-11-06 21:01:41,185 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [460851656] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 21:01:41,185 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 21:01:41,185 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-06 21:01:41,187 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [127754084] [2023-11-06 21:01:41,187 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 21:01:41,188 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-06 21:01:41,188 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-06 21:01:41,189 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-06 21:01:41,190 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-06 21:01:41,191 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) [2023-11-06 21:01:41,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 21:01:41,497 INFO L93 Difference]: Finished difference Result 135 states and 147 transitions. [2023-11-06 21:01:41,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-06 21:01:41,498 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 [2023-11-06 21:01:41,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 21:01:41,501 INFO L225 Difference]: With dead ends: 135 [2023-11-06 21:01:41,501 INFO L226 Difference]: Without dead ends: 135 [2023-11-06 21:01:41,502 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-11-06 21:01:41,503 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 [2023-11-06 21:01:41,504 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] [2023-11-06 21:01:41,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2023-11-06 21:01:41,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 133. [2023-11-06 21:01:41,524 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) [2023-11-06 21:01:41,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 145 transitions. [2023-11-06 21:01:41,526 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 145 transitions. Word has length 11 [2023-11-06 21:01:41,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 21:01:41,526 INFO L495 AbstractCegarLoop]: Abstraction has 133 states and 145 transitions. [2023-11-06 21:01:41,526 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) [2023-11-06 21:01:41,526 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 145 transitions. [2023-11-06 21:01:41,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-11-06 21:01:41,527 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:01:41,527 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:01:41,527 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-06 21:01:41,528 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)] === [2023-11-06 21:01:41,528 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:01:41,528 INFO L85 PathProgramCache]: Analyzing trace with hash -1450920404, now seen corresponding path program 1 times [2023-11-06 21:01:41,528 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-06 21:01:41,529 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1255858536] [2023-11-06 21:01:41,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:01:41,529 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:01:41,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:01:41,652 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:01:41,652 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-06 21:01:41,653 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1255858536] [2023-11-06 21:01:41,653 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1255858536] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 21:01:41,653 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 21:01:41,653 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-06 21:01:41,654 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [836170096] [2023-11-06 21:01:41,654 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 21:01:41,654 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 21:01:41,655 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-06 21:01:41,656 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 21:01:41,656 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 21:01:41,656 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) [2023-11-06 21:01:41,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 21:01:41,704 INFO L93 Difference]: Finished difference Result 132 states and 142 transitions. [2023-11-06 21:01:41,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 21:01:41,705 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 [2023-11-06 21:01:41,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 21:01:41,707 INFO L225 Difference]: With dead ends: 132 [2023-11-06 21:01:41,707 INFO L226 Difference]: Without dead ends: 132 [2023-11-06 21:01:41,707 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 21:01:41,714 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 [2023-11-06 21:01:41,715 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] [2023-11-06 21:01:41,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2023-11-06 21:01:41,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 132. [2023-11-06 21:01:41,728 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) [2023-11-06 21:01:41,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 142 transitions. [2023-11-06 21:01:41,729 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 142 transitions. Word has length 11 [2023-11-06 21:01:41,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 21:01:41,730 INFO L495 AbstractCegarLoop]: Abstraction has 132 states and 142 transitions. [2023-11-06 21:01:41,730 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) [2023-11-06 21:01:41,730 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 142 transitions. [2023-11-06 21:01:41,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-11-06 21:01:41,731 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:01:41,731 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:01:41,731 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-06 21:01:41,732 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)] === [2023-11-06 21:01:41,732 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:01:41,732 INFO L85 PathProgramCache]: Analyzing trace with hash 260952829, now seen corresponding path program 1 times [2023-11-06 21:01:41,732 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-06 21:01:41,736 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [777935801] [2023-11-06 21:01:41,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:01:41,736 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:01:41,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:01:41,912 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-06 21:01:41,913 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-06 21:01:41,913 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [777935801] [2023-11-06 21:01:41,913 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [777935801] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 21:01:41,913 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 21:01:41,913 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-06 21:01:41,914 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [663414086] [2023-11-06 21:01:41,914 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 21:01:41,916 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-06 21:01:41,916 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-06 21:01:41,917 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-06 21:01:41,917 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-06 21:01:41,917 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) [2023-11-06 21:01:42,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 21:01:42,212 INFO L93 Difference]: Finished difference Result 131 states and 141 transitions. [2023-11-06 21:01:42,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-06 21:01:42,213 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 [2023-11-06 21:01:42,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 21:01:42,214 INFO L225 Difference]: With dead ends: 131 [2023-11-06 21:01:42,214 INFO L226 Difference]: Without dead ends: 131 [2023-11-06 21:01:42,214 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-11-06 21:01:42,215 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 [2023-11-06 21:01:42,216 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] [2023-11-06 21:01:42,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2023-11-06 21:01:42,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 131. [2023-11-06 21:01:42,222 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) [2023-11-06 21:01:42,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 141 transitions. [2023-11-06 21:01:42,223 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 141 transitions. Word has length 19 [2023-11-06 21:01:42,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 21:01:42,224 INFO L495 AbstractCegarLoop]: Abstraction has 131 states and 141 transitions. [2023-11-06 21:01:42,224 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 4 states have (on average 3.25) internal successors, (13), 5 states have internal predecessors, (13), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-06 21:01:42,224 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 141 transitions. [2023-11-06 21:01:42,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-11-06 21:01:42,243 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:01:42,243 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:01:42,243 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-06 21:01:42,243 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)] === [2023-11-06 21:01:42,244 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:01:42,244 INFO L85 PathProgramCache]: Analyzing trace with hash 260952830, now seen corresponding path program 1 times [2023-11-06 21:01:42,244 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-06 21:01:42,245 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2013903693] [2023-11-06 21:01:42,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:01:42,245 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:01:42,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:01:42,571 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 21:01:42,571 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-06 21:01:42,571 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2013903693] [2023-11-06 21:01:42,572 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2013903693] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 21:01:42,572 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 21:01:42,572 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-06 21:01:42,572 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [879508054] [2023-11-06 21:01:42,573 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 21:01:42,578 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-06 21:01:42,578 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-06 21:01:42,579 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-06 21:01:42,579 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-06 21:01:42,580 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) [2023-11-06 21:01:42,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 21:01:42,855 INFO L93 Difference]: Finished difference Result 130 states and 140 transitions. [2023-11-06 21:01:42,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-06 21:01:42,855 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 [2023-11-06 21:01:42,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 21:01:42,856 INFO L225 Difference]: With dead ends: 130 [2023-11-06 21:01:42,857 INFO L226 Difference]: Without dead ends: 130 [2023-11-06 21:01:42,857 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-11-06 21:01:42,858 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 [2023-11-06 21:01:42,858 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] [2023-11-06 21:01:42,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2023-11-06 21:01:42,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 130. [2023-11-06 21:01:42,863 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) [2023-11-06 21:01:42,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 140 transitions. [2023-11-06 21:01:42,864 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 140 transitions. Word has length 19 [2023-11-06 21:01:42,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 21:01:42,864 INFO L495 AbstractCegarLoop]: Abstraction has 130 states and 140 transitions. [2023-11-06 21:01:42,864 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) [2023-11-06 21:01:42,865 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 140 transitions. [2023-11-06 21:01:42,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2023-11-06 21:01:42,865 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:01:42,866 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:01:42,866 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-06 21:01:42,866 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)] === [2023-11-06 21:01:42,866 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:01:42,867 INFO L85 PathProgramCache]: Analyzing trace with hash 1667565214, now seen corresponding path program 1 times [2023-11-06 21:01:42,867 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-06 21:01:42,867 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [18700251] [2023-11-06 21:01:42,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:01:42,867 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:01:42,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:01:43,125 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:01:43,126 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-06 21:01:43,126 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [18700251] [2023-11-06 21:01:43,126 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [18700251] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 21:01:43,126 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1324368793] [2023-11-06 21:01:43,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:01:43,127 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:01:43,127 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_828e8a66-d2e0-459b-b20e-9d98d253c54e/bin/utaipan-verify-FOvIYxoinp/z3 [2023-11-06 21:01:43,133 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_828e8a66-d2e0-459b-b20e-9d98d253c54e/bin/utaipan-verify-FOvIYxoinp/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 21:01:43,171 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_828e8a66-d2e0-459b-b20e-9d98d253c54e/bin/utaipan-verify-FOvIYxoinp/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-06 21:01:43,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:01:43,292 INFO L262 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 21 conjunts are in the unsatisfiable core [2023-11-06 21:01:43,298 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:01:43,346 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-11-06 21:01:43,416 INFO L322 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2023-11-06 21:01:43,417 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 13 [2023-11-06 21:01:43,481 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:01:43,481 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 21:01:43,789 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:01:43,790 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1324368793] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 21:01:43,790 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1223790652] [2023-11-06 21:01:43,813 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2023-11-06 21:01:43,814 INFO L166 IcfgInterpreter]: Building call graph [2023-11-06 21:01:43,819 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-06 21:01:43,825 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-06 21:01:43,825 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-06 21:01:45,428 INFO L197 IcfgInterpreter]: Interpreting procedure node_create with input of size 155 for LOIs [2023-11-06 21:01:46,313 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-06 21:01:59,869 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) (exists ((|v_#memory_$Pointer$.base_119| (Array Int (Array Int Int)))) (= |#memory_$Pointer$.base| (store |v_#memory_$Pointer$.base_119| |ULTIMATE.start_dll_circular_create_~new_head~0#1.base| (store (select |v_#memory_$Pointer$.base_119| |ULTIMATE.start_dll_circular_create_~new_head~0#1.base|) 0 |ULTIMATE.start_dll_circular_create_~head~0#1.base|)))) (= 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) (= |ULTIMATE.start_main_~len~0#1| 2) (= |ULTIMATE.start_dll_circular_create_~last~0#1.offset| 0) (not (= |ULTIMATE.start_dll_circular_create_~head~0#1.base| 0)) (exists ((|v_#memory_int_93| (Array Int (Array Int Int)))) (= |#memory_int| (store |v_#memory_int_93| |ULTIMATE.start_dll_circular_create_~new_head~0#1.base| (store (select |v_#memory_int_93| |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_dll_circular_create_~new_head~0#1.offset| 0) (exists ((|v_#memory_$Pointer$.offset_119| (Array Int (Array Int Int)))) (= |#memory_$Pointer$.offset| (store |v_#memory_$Pointer$.offset_119| |ULTIMATE.start_dll_circular_create_~new_head~0#1.base| (store (select |v_#memory_$Pointer$.offset_119| |ULTIMATE.start_dll_circular_create_~new_head~0#1.base|) 0 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 [2023-11-06 21:01:59,869 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-06 21:01:59,869 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 21:01:59,870 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 10] total 17 [2023-11-06 21:01:59,870 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [638494514] [2023-11-06 21:01:59,870 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 21:01:59,871 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-11-06 21:01:59,871 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-06 21:01:59,871 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-11-06 21:01:59,872 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=793, Unknown=4, NotChecked=0, Total=930 [2023-11-06 21:01:59,873 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) [2023-11-06 21:02:00,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 21:02:00,485 INFO L93 Difference]: Finished difference Result 137 states and 149 transitions. [2023-11-06 21:02:00,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-06 21:02:00,486 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 [2023-11-06 21:02:00,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 21:02:00,487 INFO L225 Difference]: With dead ends: 137 [2023-11-06 21:02:00,487 INFO L226 Difference]: Without dead ends: 137 [2023-11-06 21:02:00,488 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 267 ImplicationChecksByTransitivity, 13.8s TimeCoverageRelationStatistics Valid=145, Invalid=843, Unknown=4, NotChecked=0, Total=992 [2023-11-06 21:02:00,489 INFO L413 NwaCegarLoop]: 111 mSDtfsCounter, 11 mSDsluCounter, 459 mSDsCounter, 0 mSdLazyCounter, 660 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s 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, 0.5s IncrementalHoareTripleChecker+Time [2023-11-06 21:02:00,489 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 570 Invalid, 682 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 660 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-06 21:02:00,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2023-11-06 21:02:00,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 135. [2023-11-06 21:02:00,501 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) [2023-11-06 21:02:00,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 148 transitions. [2023-11-06 21:02:00,504 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 148 transitions. Word has length 21 [2023-11-06 21:02:00,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 21:02:00,505 INFO L495 AbstractCegarLoop]: Abstraction has 135 states and 148 transitions. [2023-11-06 21:02:00,505 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) [2023-11-06 21:02:00,505 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 148 transitions. [2023-11-06 21:02:00,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2023-11-06 21:02:00,507 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:02:00,507 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:02:00,522 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_828e8a66-d2e0-459b-b20e-9d98d253c54e/bin/utaipan-verify-FOvIYxoinp/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-06 21:02:00,722 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_828e8a66-d2e0-459b-b20e-9d98d253c54e/bin/utaipan-verify-FOvIYxoinp/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:02:00,722 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)] === [2023-11-06 21:02:00,723 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:02:00,723 INFO L85 PathProgramCache]: Analyzing trace with hash 1667565215, now seen corresponding path program 1 times [2023-11-06 21:02:00,723 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-06 21:02:00,723 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [583681327] [2023-11-06 21:02:00,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:02:00,723 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:02:00,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:02:01,307 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:02:01,307 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-06 21:02:01,307 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [583681327] [2023-11-06 21:02:01,307 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [583681327] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 21:02:01,307 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [150792766] [2023-11-06 21:02:01,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:02:01,308 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:02:01,308 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_828e8a66-d2e0-459b-b20e-9d98d253c54e/bin/utaipan-verify-FOvIYxoinp/z3 [2023-11-06 21:02:01,310 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_828e8a66-d2e0-459b-b20e-9d98d253c54e/bin/utaipan-verify-FOvIYxoinp/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 21:02:01,332 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_828e8a66-d2e0-459b-b20e-9d98d253c54e/bin/utaipan-verify-FOvIYxoinp/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-06 21:02:01,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:02:01,450 INFO L262 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 32 conjunts are in the unsatisfiable core [2023-11-06 21:02:01,454 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:02:01,461 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-11-06 21:02:01,581 INFO L322 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-11-06 21:02:01,581 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2023-11-06 21:02:01,588 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2023-11-06 21:02:01,622 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:02:01,622 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 21:02:01,787 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [150792766] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 21:02:01,788 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [869961130] [2023-11-06 21:02:01,795 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2023-11-06 21:02:01,795 INFO L166 IcfgInterpreter]: Building call graph [2023-11-06 21:02:01,796 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-06 21:02:01,796 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-06 21:02:01,796 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-06 21:02:02,776 INFO L197 IcfgInterpreter]: Interpreting procedure node_create with input of size 155 for LOIs [2023-11-06 21:02:03,468 INFO L180 IcfgInterpreter]: Interpretation finished