./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/list-simple/dll2c_insert_unequal.i --full-output --architecture 32bit


--------------------------------------------------------------------------------


Checking for memory safety (deref-memtrack)
Using default analysis
Version 4fc63b2a
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_ab040f40-2a7a-4cbd-aaa7-1b9b6d19f78c/bin/utaipan-verify-DbMuA5NWw2/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab040f40-2a7a-4cbd-aaa7-1b9b6d19f78c/bin/utaipan-verify-DbMuA5NWw2/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab040f40-2a7a-4cbd-aaa7-1b9b6d19f78c/bin/utaipan-verify-DbMuA5NWw2/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab040f40-2a7a-4cbd-aaa7-1b9b6d19f78c/bin/utaipan-verify-DbMuA5NWw2/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/list-simple/dll2c_insert_unequal.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab040f40-2a7a-4cbd-aaa7-1b9b6d19f78c/bin/utaipan-verify-DbMuA5NWw2/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab040f40-2a7a-4cbd-aaa7-1b9b6d19f78c/bin/utaipan-verify-DbMuA5NWw2 --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 1b81f923e96224472f8219a473f794261ff02356a47c6b09b527f0fc600725a8
--- Real Ultimate output ---
This is Ultimate 0.2.5-dev-4fc63b2
[2024-11-02 12:38:44,004 INFO  L188        SettingsManager]: Resetting all preferences to default values...
[2024-11-02 12:38:44,083 INFO  L114        SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab040f40-2a7a-4cbd-aaa7-1b9b6d19f78c/bin/utaipan-verify-DbMuA5NWw2/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf
[2024-11-02 12:38:44,092 WARN  L101        SettingsManager]: Preference file contains the following unknown settings:
[2024-11-02 12:38:44,093 WARN  L103        SettingsManager]:   * de.uni_freiburg.informatik.ultimate.core.Log level for class
[2024-11-02 12:38:44,128 INFO  L130        SettingsManager]: Preferences different from defaults after loading the file:
[2024-11-02 12:38:44,129 INFO  L151        SettingsManager]: Preferences of UltimateCore differ from their defaults:
[2024-11-02 12:38:44,129 INFO  L153        SettingsManager]:  * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR;
[2024-11-02 12:38:44,130 INFO  L151        SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults:
[2024-11-02 12:38:44,130 INFO  L153        SettingsManager]:  * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS
[2024-11-02 12:38:44,130 INFO  L153        SettingsManager]:  * User list type=DISABLED
[2024-11-02 12:38:44,131 INFO  L151        SettingsManager]: Preferences of Abstract Interpretation differ from their defaults:
[2024-11-02 12:38:44,131 INFO  L153        SettingsManager]:  * Explicit value domain=true
[2024-11-02 12:38:44,134 INFO  L153        SettingsManager]:  * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain
[2024-11-02 12:38:44,135 INFO  L153        SettingsManager]:  * Octagon Domain=false
[2024-11-02 12:38:44,135 INFO  L153        SettingsManager]:  * Abstract domain=CompoundDomain
[2024-11-02 12:38:44,135 INFO  L153        SettingsManager]:  * Check feasibility of abstract posts with an SMT solver=true
[2024-11-02 12:38:44,135 INFO  L153        SettingsManager]:  * Use the RCFG-of-the-future interface=true
[2024-11-02 12:38:44,136 INFO  L153        SettingsManager]:  * Interval Domain=false
[2024-11-02 12:38:44,136 INFO  L151        SettingsManager]: Preferences of Sifa differ from their defaults:
[2024-11-02 12:38:44,136 INFO  L153        SettingsManager]:  * Call Summarizer=TopInputCallSummarizer
[2024-11-02 12:38:44,138 INFO  L153        SettingsManager]:  * Simplification Technique=POLY_PAC
[2024-11-02 12:38:44,138 INFO  L151        SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults:
[2024-11-02 12:38:44,139 INFO  L153        SettingsManager]:  * Create parallel compositions if possible=false
[2024-11-02 12:38:44,139 INFO  L151        SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults:
[2024-11-02 12:38:44,139 INFO  L153        SettingsManager]:  * sizeof long=4
[2024-11-02 12:38:44,140 INFO  L153        SettingsManager]:  * Overapproximate operations on floating types=true
[2024-11-02 12:38:44,140 INFO  L153        SettingsManager]:  * sizeof POINTER=4
[2024-11-02 12:38:44,140 INFO  L153        SettingsManager]:  * Check division by zero=IGNORE
[2024-11-02 12:38:44,141 INFO  L153        SettingsManager]:  * Check for the main procedure if all allocated memory was freed=true
[2024-11-02 12:38:44,141 INFO  L153        SettingsManager]:  * Bitprecise bitfields=true
[2024-11-02 12:38:44,141 INFO  L153        SettingsManager]:  * SV-COMP memtrack compatibility mode=true
[2024-11-02 12:38:44,142 INFO  L153        SettingsManager]:  * If two pointers are subtracted or compared they have the same base address=IGNORE
[2024-11-02 12:38:44,142 INFO  L153        SettingsManager]:  * Adapt memory model on pointer casts if necessary=true
[2024-11-02 12:38:44,143 INFO  L153        SettingsManager]:  * Allow undefined functions=false
[2024-11-02 12:38:44,143 INFO  L153        SettingsManager]:  * Check unreachability of reach_error function=false
[2024-11-02 12:38:44,144 INFO  L153        SettingsManager]:  * sizeof long double=12
[2024-11-02 12:38:44,145 INFO  L153        SettingsManager]:  * Use constant arrays=true
[2024-11-02 12:38:44,145 INFO  L151        SettingsManager]: Preferences of RCFGBuilder differ from their defaults:
[2024-11-02 12:38:44,145 INFO  L153        SettingsManager]:  * Only consider context switches at boundaries of atomic blocks=true
[2024-11-02 12:38:44,145 INFO  L153        SettingsManager]:  * SMT solver=External_DefaultMode
[2024-11-02 12:38:44,146 INFO  L153        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2024-11-02 12:38:44,146 INFO  L151        SettingsManager]: Preferences of TraceAbstraction differ from their defaults:
[2024-11-02 12:38:44,146 INFO  L153        SettingsManager]:  * Compute Interpolants along a Counterexample=FPandBP
[2024-11-02 12:38:44,147 INFO  L153        SettingsManager]:  * Trace refinement strategy=SIFA_TAIPAN
[2024-11-02 12:38:44,147 INFO  L153        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2024-11-02 12:38:44,147 INFO  L153        SettingsManager]:  * Apply one-shot large block encoding in concurrent analysis=false
[2024-11-02 12:38:44,148 INFO  L153        SettingsManager]:  * Trace refinement exception blacklist=NONE
[2024-11-02 12:38:44,148 INFO  L153        SettingsManager]:  * SMT solver=External_ModelsAndUnsatCoreMode
[2024-11-02 12:38:44,148 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_ab040f40-2a7a-4cbd-aaa7-1b9b6d19f78c/bin/utaipan-verify-DbMuA5NWw2/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_ab040f40-2a7a-4cbd-aaa7-1b9b6d19f78c/bin/utaipan-verify-DbMuA5NWw2
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 -> 1b81f923e96224472f8219a473f794261ff02356a47c6b09b527f0fc600725a8
[2024-11-02 12:38:44,427 INFO  L75    nceAwareModelManager]: Repository-Root is: /tmp
[2024-11-02 12:38:44,459 INFO  L261   ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized
[2024-11-02 12:38:44,464 INFO  L217   ainManager$Toolchain]: [Toolchain 1]: Toolchain selected.
[2024-11-02 12:38:44,465 INFO  L270        PluginConnector]: Initializing CDTParser...
[2024-11-02 12:38:44,466 INFO  L274        PluginConnector]: CDTParser initialized
[2024-11-02 12:38:44,468 INFO  L431   ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab040f40-2a7a-4cbd-aaa7-1b9b6d19f78c/bin/utaipan-verify-DbMuA5NWw2/../../sv-benchmarks/c/list-simple/dll2c_insert_unequal.i
Unable to find full path for "g++"
[2024-11-02 12:38:46,480 INFO  L533              CDTParser]: Created temporary CDT project at NULL
[2024-11-02 12:38:46,775 INFO  L384              CDTParser]: Found 1 translation units.
[2024-11-02 12:38:46,775 INFO  L180              CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab040f40-2a7a-4cbd-aaa7-1b9b6d19f78c/sv-benchmarks/c/list-simple/dll2c_insert_unequal.i
[2024-11-02 12:38:46,793 INFO  L427              CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab040f40-2a7a-4cbd-aaa7-1b9b6d19f78c/bin/utaipan-verify-DbMuA5NWw2/data/80f8ff2f3/1a948dd4b31b482bab97909a76d238d0/FLAGaec006639
[2024-11-02 12:38:47,066 INFO  L435              CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab040f40-2a7a-4cbd-aaa7-1b9b6d19f78c/bin/utaipan-verify-DbMuA5NWw2/data/80f8ff2f3/1a948dd4b31b482bab97909a76d238d0
[2024-11-02 12:38:47,068 INFO  L299   ainManager$Toolchain]: ####################### [Toolchain 1] #######################
[2024-11-02 12:38:47,069 INFO  L133        ToolchainWalker]: Walking toolchain with 6 elements.
[2024-11-02 12:38:47,074 INFO  L112        PluginConnector]: ------------------------CACSL2BoogieTranslator----------------------------
[2024-11-02 12:38:47,076 INFO  L270        PluginConnector]: Initializing CACSL2BoogieTranslator...
[2024-11-02 12:38:47,083 INFO  L274        PluginConnector]: CACSL2BoogieTranslator initialized
[2024-11-02 12:38:47,088 INFO  L184        PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 12:38:47" (1/1) ...
[2024-11-02 12:38:47,089 INFO  L204        PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@73c73654 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:38:47, skipping insertion in model container
[2024-11-02 12:38:47,089 INFO  L184        PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 12:38:47" (1/1) ...
[2024-11-02 12:38:47,140 INFO  L175         MainTranslator]: Built tables and reachable declarations
[2024-11-02 12:38:47,582 INFO  L210          PostProcessor]: Analyzing one entry point: main
[2024-11-02 12:38:47,596 INFO  L200         MainTranslator]: Completed pre-run
[2024-11-02 12:38:47,666 INFO  L210          PostProcessor]: Analyzing one entry point: main
[2024-11-02 12:38:47,703 INFO  L204         MainTranslator]: Completed translation
[2024-11-02 12:38:47,704 INFO  L201        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:38:47 WrapperNode
[2024-11-02 12:38:47,704 INFO  L131        PluginConnector]: ------------------------ END CACSL2BoogieTranslator----------------------------
[2024-11-02 12:38:47,705 INFO  L112        PluginConnector]: ------------------------Boogie Procedure Inliner----------------------------
[2024-11-02 12:38:47,705 INFO  L270        PluginConnector]: Initializing Boogie Procedure Inliner...
[2024-11-02 12:38:47,705 INFO  L274        PluginConnector]: Boogie Procedure Inliner initialized
[2024-11-02 12:38:47,712 INFO  L184        PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:38:47" (1/1) ...
[2024-11-02 12:38:47,726 INFO  L184        PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:38:47" (1/1) ...
[2024-11-02 12:38:47,753 INFO  L138                Inliner]: procedures = 127, calls = 59, calls flagged for inlining = 7, calls inlined = 7, statements flattened = 195
[2024-11-02 12:38:47,754 INFO  L131        PluginConnector]: ------------------------ END Boogie Procedure Inliner----------------------------
[2024-11-02 12:38:47,754 INFO  L112        PluginConnector]: ------------------------Boogie Preprocessor----------------------------
[2024-11-02 12:38:47,755 INFO  L270        PluginConnector]: Initializing Boogie Preprocessor...
[2024-11-02 12:38:47,755 INFO  L274        PluginConnector]: Boogie Preprocessor initialized
[2024-11-02 12:38:47,764 INFO  L184        PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:38:47" (1/1) ...
[2024-11-02 12:38:47,765 INFO  L184        PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:38:47" (1/1) ...
[2024-11-02 12:38:47,769 INFO  L184        PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:38:47" (1/1) ...
[2024-11-02 12:38:47,769 INFO  L184        PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:38:47" (1/1) ...
[2024-11-02 12:38:47,779 INFO  L184        PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:38:47" (1/1) ...
[2024-11-02 12:38:47,786 INFO  L184        PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:38:47" (1/1) ...
[2024-11-02 12:38:47,788 INFO  L184        PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:38:47" (1/1) ...
[2024-11-02 12:38:47,790 INFO  L184        PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:38:47" (1/1) ...
[2024-11-02 12:38:47,793 INFO  L131        PluginConnector]: ------------------------ END Boogie Preprocessor----------------------------
[2024-11-02 12:38:47,794 INFO  L112        PluginConnector]: ------------------------RCFGBuilder----------------------------
[2024-11-02 12:38:47,795 INFO  L270        PluginConnector]: Initializing RCFGBuilder...
[2024-11-02 12:38:47,795 INFO  L274        PluginConnector]: RCFGBuilder initialized
[2024-11-02 12:38:47,796 INFO  L184        PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:38:47" (1/1) ...
[2024-11-02 12:38:47,810 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2024-11-02 12:38:47,830 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab040f40-2a7a-4cbd-aaa7-1b9b6d19f78c/bin/utaipan-verify-DbMuA5NWw2/z3
[2024-11-02 12:38:47,843 INFO  L229       MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab040f40-2a7a-4cbd-aaa7-1b9b6d19f78c/bin/utaipan-verify-DbMuA5NWw2/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null)
[2024-11-02 12:38:47,846 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab040f40-2a7a-4cbd-aaa7-1b9b6d19f78c/bin/utaipan-verify-DbMuA5NWw2/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process
[2024-11-02 12:38:47,874 INFO  L130     BoogieDeclarations]: Found specification of procedure read~int
[2024-11-02 12:38:47,874 INFO  L130     BoogieDeclarations]: Found specification of procedure write~int
[2024-11-02 12:38:47,874 INFO  L130     BoogieDeclarations]: Found specification of procedure node_create
[2024-11-02 12:38:47,874 INFO  L138     BoogieDeclarations]: Found implementation of procedure node_create
[2024-11-02 12:38:47,874 INFO  L130     BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap
[2024-11-02 12:38:47,875 INFO  L130     BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit
[2024-11-02 12:38:47,875 INFO  L130     BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack
[2024-11-02 12:38:47,875 INFO  L130     BoogieDeclarations]: Found specification of procedure write~$Pointer$
[2024-11-02 12:38:47,875 INFO  L130     BoogieDeclarations]: Found specification of procedure read~$Pointer$
[2024-11-02 12:38:47,875 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc
[2024-11-02 12:38:47,875 INFO  L130     BoogieDeclarations]: Found specification of procedure write~init~$Pointer$
[2024-11-02 12:38:47,876 INFO  L130     BoogieDeclarations]: Found specification of procedure write~init~int
[2024-11-02 12:38:47,876 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.start
[2024-11-02 12:38:47,876 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.start
[2024-11-02 12:38:48,035 INFO  L238             CfgBuilder]: Building ICFG
[2024-11-02 12:38:48,037 INFO  L264             CfgBuilder]: Building CFG for each procedure with an implementation
[2024-11-02 12:38:48,702 INFO  L?                        ?]: Removed 197 outVars from TransFormulas that were not future-live.
[2024-11-02 12:38:48,702 INFO  L287             CfgBuilder]: Performing block encoding
[2024-11-02 12:38:48,789 INFO  L311             CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start)
[2024-11-02 12:38:48,789 INFO  L316             CfgBuilder]: Removed 5 assume(true) statements.
[2024-11-02 12:38:48,790 INFO  L201        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 12:38:48 BoogieIcfgContainer
[2024-11-02 12:38:48,790 INFO  L131        PluginConnector]: ------------------------ END RCFGBuilder----------------------------
[2024-11-02 12:38:48,796 INFO  L112        PluginConnector]: ------------------------TraceAbstraction----------------------------
[2024-11-02 12:38:48,796 INFO  L270        PluginConnector]: Initializing TraceAbstraction...
[2024-11-02 12:38:48,804 INFO  L274        PluginConnector]: TraceAbstraction initialized
[2024-11-02 12:38:48,804 INFO  L184        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.11 12:38:47" (1/3) ...
[2024-11-02 12:38:48,805 INFO  L204        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4e732f51 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 12:38:48, skipping insertion in model container
[2024-11-02 12:38:48,805 INFO  L184        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:38:47" (2/3) ...
[2024-11-02 12:38:48,806 INFO  L204        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4e732f51 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 12:38:48, skipping insertion in model container
[2024-11-02 12:38:48,806 INFO  L184        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 12:38:48" (3/3) ...
[2024-11-02 12:38:48,807 INFO  L112   eAbstractionObserver]: Analyzing ICFG dll2c_insert_unequal.i
[2024-11-02 12:38:48,831 INFO  L214   ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION
[2024-11-02 12:38:48,831 INFO  L154   ceAbstractionStarter]: Applying trace abstraction to program that has 82 error locations.
[2024-11-02 12:38:48,896 INFO  L332      AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ========
[2024-11-02 12:38:48,903 INFO  L333      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, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=None, 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;@46776a18, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms]
[2024-11-02 12:38:48,903 INFO  L334      AbstractCegarLoop]: Starting to check reachability of 82 error locations.
[2024-11-02 12:38:48,907 INFO  L276                IsEmpty]: Start isEmpty. Operand  has 158 states, 71 states have (on average 2.3943661971830985) internal successors, (170), 153 states have internal predecessors, (170), 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)
[2024-11-02 12:38:48,914 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 6
[2024-11-02 12:38:48,915 INFO  L207           NwaCegarLoop]: Found error trace
[2024-11-02 12:38:48,915 INFO  L215           NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1]
[2024-11-02 12:38:48,916 INFO  L396      AbstractCegarLoop]: === Iteration 1 === Targeting node_createErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 79 more)] ===
[2024-11-02 12:38:48,921 INFO  L157       PredicateUnifier]: Initialized classic predicate unifier
[2024-11-02 12:38:48,922 INFO  L85        PathProgramCache]: Analyzing trace with hash 314316090, now seen corresponding path program 1 times
[2024-11-02 12:38:48,933 INFO  L118   FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN
[2024-11-02 12:38:48,933 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [375938347]
[2024-11-02 12:38:48,933 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2024-11-02 12:38:48,934 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2024-11-02 12:38:49,048 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2024-11-02 12:38:49,212 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2024-11-02 12:38:49,213 INFO  L136   FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace
[2024-11-02 12:38:49,213 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [375938347]
[2024-11-02 12:38:49,214 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [375938347] provided 1 perfect and 0 imperfect interpolant sequences
[2024-11-02 12:38:49,214 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2024-11-02 12:38:49,214 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2
[2024-11-02 12:38:49,216 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1749909404]
[2024-11-02 12:38:49,217 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2024-11-02 12:38:49,221 INFO  L548      AbstractCegarLoop]: INTERPOLANT automaton has 3 states
[2024-11-02 12:38:49,222 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN
[2024-11-02 12:38:49,255 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2024-11-02 12:38:49,257 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2024-11-02 12:38:49,260 INFO  L87              Difference]: Start difference. First operand  has 158 states, 71 states have (on average 2.3943661971830985) internal successors, (170), 153 states have internal predecessors, (170), 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)
[2024-11-02 12:38:49,557 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2024-11-02 12:38:49,557 INFO  L93              Difference]: Finished difference Result 154 states and 168 transitions.
[2024-11-02 12:38:49,559 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2024-11-02 12:38:49,560 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
[2024-11-02 12:38:49,561 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2024-11-02 12:38:49,572 INFO  L225             Difference]: With dead ends: 154
[2024-11-02 12:38:49,573 INFO  L226             Difference]: Without dead ends: 152
[2024-11-02 12:38:49,575 INFO  L431           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
[2024-11-02 12:38:49,580 INFO  L432           NwaCegarLoop]: 141 mSDtfsCounter, 2 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 111 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 221 SdHoareTripleChecker+Invalid, 113 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 111 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time
[2024-11-02 12:38:49,584 INFO  L433           NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 221 Invalid, 113 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 111 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time]
[2024-11-02 12:38:49,606 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 152 states.
[2024-11-02 12:38:49,635 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 152.
[2024-11-02 12:38:49,637 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 152 states, 69 states have (on average 2.3043478260869565) internal successors, (159), 147 states have internal predecessors, (159), 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)
[2024-11-02 12:38:49,640 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 165 transitions.
[2024-11-02 12:38:49,641 INFO  L78                 Accepts]: Start accepts. Automaton has 152 states and 165 transitions. Word has length 5
[2024-11-02 12:38:49,643 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2024-11-02 12:38:49,643 INFO  L471      AbstractCegarLoop]: Abstraction has 152 states and 165 transitions.
[2024-11-02 12:38:49,644 INFO  L472      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)
[2024-11-02 12:38:49,644 INFO  L276                IsEmpty]: Start isEmpty. Operand 152 states and 165 transitions.
[2024-11-02 12:38:49,644 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 6
[2024-11-02 12:38:49,644 INFO  L207           NwaCegarLoop]: Found error trace
[2024-11-02 12:38:49,644 INFO  L215           NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1]
[2024-11-02 12:38:49,645 WARN  L453      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0
[2024-11-02 12:38:49,646 INFO  L396      AbstractCegarLoop]: === Iteration 2 === Targeting node_createErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 79 more)] ===
[2024-11-02 12:38:49,648 INFO  L157       PredicateUnifier]: Initialized classic predicate unifier
[2024-11-02 12:38:49,648 INFO  L85        PathProgramCache]: Analyzing trace with hash 314316091, now seen corresponding path program 1 times
[2024-11-02 12:38:49,648 INFO  L118   FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN
[2024-11-02 12:38:49,648 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1347355351]
[2024-11-02 12:38:49,649 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2024-11-02 12:38:49,650 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2024-11-02 12:38:49,692 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2024-11-02 12:38:49,834 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2024-11-02 12:38:49,834 INFO  L136   FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace
[2024-11-02 12:38:49,835 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1347355351]
[2024-11-02 12:38:49,835 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1347355351] provided 1 perfect and 0 imperfect interpolant sequences
[2024-11-02 12:38:49,835 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2024-11-02 12:38:49,836 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2
[2024-11-02 12:38:49,836 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [568686690]
[2024-11-02 12:38:49,836 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2024-11-02 12:38:49,837 INFO  L548      AbstractCegarLoop]: INTERPOLANT automaton has 3 states
[2024-11-02 12:38:49,837 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN
[2024-11-02 12:38:49,838 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2024-11-02 12:38:49,838 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2024-11-02 12:38:49,838 INFO  L87              Difference]: Start difference. First operand 152 states and 165 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)
[2024-11-02 12:38:50,004 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2024-11-02 12:38:50,004 INFO  L93              Difference]: Finished difference Result 149 states and 162 transitions.
[2024-11-02 12:38:50,005 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2024-11-02 12:38:50,005 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
[2024-11-02 12:38:50,005 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2024-11-02 12:38:50,007 INFO  L225             Difference]: With dead ends: 149
[2024-11-02 12:38:50,007 INFO  L226             Difference]: Without dead ends: 149
[2024-11-02 12:38:50,007 INFO  L431           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
[2024-11-02 12:38:50,008 INFO  L432           NwaCegarLoop]: 140 mSDtfsCounter, 2 mSDsluCounter, 85 mSDsCounter, 0 mSdLazyCounter, 95 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 225 SdHoareTripleChecker+Invalid, 97 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 95 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2024-11-02 12:38:50,009 INFO  L433           NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 225 Invalid, 97 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 95 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2024-11-02 12:38:50,010 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 149 states.
[2024-11-02 12:38:50,016 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 149.
[2024-11-02 12:38:50,017 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 149 states, 69 states have (on average 2.260869565217391) internal successors, (156), 144 states have internal predecessors, (156), 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)
[2024-11-02 12:38:50,019 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 162 transitions.
[2024-11-02 12:38:50,019 INFO  L78                 Accepts]: Start accepts. Automaton has 149 states and 162 transitions. Word has length 5
[2024-11-02 12:38:50,019 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2024-11-02 12:38:50,019 INFO  L471      AbstractCegarLoop]: Abstraction has 149 states and 162 transitions.
[2024-11-02 12:38:50,019 INFO  L472      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)
[2024-11-02 12:38:50,020 INFO  L276                IsEmpty]: Start isEmpty. Operand 149 states and 162 transitions.
[2024-11-02 12:38:50,020 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 12
[2024-11-02 12:38:50,020 INFO  L207           NwaCegarLoop]: Found error trace
[2024-11-02 12:38:50,020 INFO  L215           NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2024-11-02 12:38:50,021 WARN  L453      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1
[2024-11-02 12:38:50,021 INFO  L396      AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 79 more)] ===
[2024-11-02 12:38:50,021 INFO  L157       PredicateUnifier]: Initialized classic predicate unifier
[2024-11-02 12:38:50,021 INFO  L85        PathProgramCache]: Analyzing trace with hash -1588849359, now seen corresponding path program 1 times
[2024-11-02 12:38:50,022 INFO  L118   FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN
[2024-11-02 12:38:50,022 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1829249964]
[2024-11-02 12:38:50,022 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2024-11-02 12:38:50,022 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2024-11-02 12:38:50,042 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2024-11-02 12:38:50,131 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2024-11-02 12:38:50,132 INFO  L136   FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace
[2024-11-02 12:38:50,132 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1829249964]
[2024-11-02 12:38:50,132 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1829249964] provided 1 perfect and 0 imperfect interpolant sequences
[2024-11-02 12:38:50,132 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2024-11-02 12:38:50,132 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3
[2024-11-02 12:38:50,133 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1990121488]
[2024-11-02 12:38:50,133 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2024-11-02 12:38:50,133 INFO  L548      AbstractCegarLoop]: INTERPOLANT automaton has 3 states
[2024-11-02 12:38:50,133 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN
[2024-11-02 12:38:50,134 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2024-11-02 12:38:50,134 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2024-11-02 12:38:50,135 INFO  L87              Difference]: Start difference. First operand 149 states and 162 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)
[2024-11-02 12:38:50,195 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2024-11-02 12:38:50,195 INFO  L93              Difference]: Finished difference Result 160 states and 175 transitions.
[2024-11-02 12:38:50,197 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2024-11-02 12:38:50,197 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
[2024-11-02 12:38:50,197 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2024-11-02 12:38:50,198 INFO  L225             Difference]: With dead ends: 160
[2024-11-02 12:38:50,198 INFO  L226             Difference]: Without dead ends: 160
[2024-11-02 12:38:50,199 INFO  L431           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
[2024-11-02 12:38:50,202 INFO  L432           NwaCegarLoop]: 141 mSDtfsCounter, 10 mSDsluCounter, 139 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 280 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time
[2024-11-02 12:38:50,203 INFO  L433           NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 280 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time]
[2024-11-02 12:38:50,204 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 160 states.
[2024-11-02 12:38:50,220 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 150.
[2024-11-02 12:38:50,220 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 150 states, 70 states have (on average 2.242857142857143) internal successors, (157), 145 states have internal predecessors, (157), 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)
[2024-11-02 12:38:50,221 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 163 transitions.
[2024-11-02 12:38:50,222 INFO  L78                 Accepts]: Start accepts. Automaton has 150 states and 163 transitions. Word has length 11
[2024-11-02 12:38:50,225 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2024-11-02 12:38:50,225 INFO  L471      AbstractCegarLoop]: Abstraction has 150 states and 163 transitions.
[2024-11-02 12:38:50,225 INFO  L472      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)
[2024-11-02 12:38:50,225 INFO  L276                IsEmpty]: Start isEmpty. Operand 150 states and 163 transitions.
[2024-11-02 12:38:50,226 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 20
[2024-11-02 12:38:50,226 INFO  L207           NwaCegarLoop]: Found error trace
[2024-11-02 12:38:50,226 INFO  L215           NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2024-11-02 12:38:50,226 WARN  L453      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2
[2024-11-02 12:38:50,227 INFO  L396      AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 79 more)] ===
[2024-11-02 12:38:50,228 INFO  L157       PredicateUnifier]: Initialized classic predicate unifier
[2024-11-02 12:38:50,228 INFO  L85        PathProgramCache]: Analyzing trace with hash -856336920, now seen corresponding path program 1 times
[2024-11-02 12:38:50,229 INFO  L118   FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN
[2024-11-02 12:38:50,229 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [487931735]
[2024-11-02 12:38:50,229 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2024-11-02 12:38:50,229 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2024-11-02 12:38:50,275 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2024-11-02 12:38:50,406 INFO  L134       CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked.
[2024-11-02 12:38:50,406 INFO  L136   FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace
[2024-11-02 12:38:50,406 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [487931735]
[2024-11-02 12:38:50,406 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [487931735] provided 1 perfect and 0 imperfect interpolant sequences
[2024-11-02 12:38:50,407 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2024-11-02 12:38:50,407 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5
[2024-11-02 12:38:50,407 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [195430970]
[2024-11-02 12:38:50,407 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2024-11-02 12:38:50,408 INFO  L548      AbstractCegarLoop]: INTERPOLANT automaton has 6 states
[2024-11-02 12:38:50,408 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN
[2024-11-02 12:38:50,408 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants.
[2024-11-02 12:38:50,409 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30
[2024-11-02 12:38:50,409 INFO  L87              Difference]: Start difference. First operand 150 states and 163 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)
[2024-11-02 12:38:50,760 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2024-11-02 12:38:50,761 INFO  L93              Difference]: Finished difference Result 149 states and 162 transitions.
[2024-11-02 12:38:50,761 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. 
[2024-11-02 12:38:50,761 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
[2024-11-02 12:38:50,762 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2024-11-02 12:38:50,763 INFO  L225             Difference]: With dead ends: 149
[2024-11-02 12:38:50,763 INFO  L226             Difference]: Without dead ends: 149
[2024-11-02 12:38:50,763 INFO  L431           NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30
[2024-11-02 12:38:50,764 INFO  L432           NwaCegarLoop]: 133 mSDtfsCounter, 7 mSDsluCounter, 289 mSDsCounter, 0 mSdLazyCounter, 370 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 422 SdHoareTripleChecker+Invalid, 371 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 370 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time
[2024-11-02 12:38:50,768 INFO  L433           NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 422 Invalid, 371 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 370 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time]
[2024-11-02 12:38:50,769 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 149 states.
[2024-11-02 12:38:50,774 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 149.
[2024-11-02 12:38:50,775 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 149 states, 70 states have (on average 2.2285714285714286) internal successors, (156), 144 states have internal predecessors, (156), 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)
[2024-11-02 12:38:50,781 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 162 transitions.
[2024-11-02 12:38:50,781 INFO  L78                 Accepts]: Start accepts. Automaton has 149 states and 162 transitions. Word has length 19
[2024-11-02 12:38:50,781 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2024-11-02 12:38:50,782 INFO  L471      AbstractCegarLoop]: Abstraction has 149 states and 162 transitions.
[2024-11-02 12:38:50,782 INFO  L472      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)
[2024-11-02 12:38:50,782 INFO  L276                IsEmpty]: Start isEmpty. Operand 149 states and 162 transitions.
[2024-11-02 12:38:50,782 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 20
[2024-11-02 12:38:50,783 INFO  L207           NwaCegarLoop]: Found error trace
[2024-11-02 12:38:50,783 INFO  L215           NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2024-11-02 12:38:50,783 WARN  L453      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3
[2024-11-02 12:38:50,783 INFO  L396      AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 79 more)] ===
[2024-11-02 12:38:50,784 INFO  L157       PredicateUnifier]: Initialized classic predicate unifier
[2024-11-02 12:38:50,784 INFO  L85        PathProgramCache]: Analyzing trace with hash -856336919, now seen corresponding path program 1 times
[2024-11-02 12:38:50,784 INFO  L118   FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN
[2024-11-02 12:38:50,784 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [738088974]
[2024-11-02 12:38:50,784 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2024-11-02 12:38:50,785 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2024-11-02 12:38:50,828 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2024-11-02 12:38:51,116 INFO  L134       CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked.
[2024-11-02 12:38:51,117 INFO  L136   FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace
[2024-11-02 12:38:51,117 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [738088974]
[2024-11-02 12:38:51,117 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [738088974] provided 1 perfect and 0 imperfect interpolant sequences
[2024-11-02 12:38:51,117 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2024-11-02 12:38:51,117 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5
[2024-11-02 12:38:51,117 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [326091198]
[2024-11-02 12:38:51,118 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2024-11-02 12:38:51,118 INFO  L548      AbstractCegarLoop]: INTERPOLANT automaton has 6 states
[2024-11-02 12:38:51,118 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN
[2024-11-02 12:38:51,119 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants.
[2024-11-02 12:38:51,120 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30
[2024-11-02 12:38:51,120 INFO  L87              Difference]: Start difference. First operand 149 states and 162 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)
[2024-11-02 12:38:51,467 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2024-11-02 12:38:51,467 INFO  L93              Difference]: Finished difference Result 148 states and 161 transitions.
[2024-11-02 12:38:51,468 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. 
[2024-11-02 12:38:51,468 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
[2024-11-02 12:38:51,469 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2024-11-02 12:38:51,469 INFO  L225             Difference]: With dead ends: 148
[2024-11-02 12:38:51,470 INFO  L226             Difference]: Without dead ends: 148
[2024-11-02 12:38:51,470 INFO  L431           NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30
[2024-11-02 12:38:51,472 INFO  L432           NwaCegarLoop]: 133 mSDtfsCounter, 6 mSDsluCounter, 313 mSDsCounter, 0 mSdLazyCounter, 341 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 446 SdHoareTripleChecker+Invalid, 341 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 341 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time
[2024-11-02 12:38:51,472 INFO  L433           NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 446 Invalid, 341 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 341 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time]
[2024-11-02 12:38:51,473 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 148 states.
[2024-11-02 12:38:51,478 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 148.
[2024-11-02 12:38:51,478 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 148 states, 70 states have (on average 2.2142857142857144) internal successors, (155), 143 states have internal predecessors, (155), 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)
[2024-11-02 12:38:51,479 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 161 transitions.
[2024-11-02 12:38:51,479 INFO  L78                 Accepts]: Start accepts. Automaton has 148 states and 161 transitions. Word has length 19
[2024-11-02 12:38:51,480 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2024-11-02 12:38:51,480 INFO  L471      AbstractCegarLoop]: Abstraction has 148 states and 161 transitions.
[2024-11-02 12:38:51,480 INFO  L472      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)
[2024-11-02 12:38:51,480 INFO  L276                IsEmpty]: Start isEmpty. Operand 148 states and 161 transitions.
[2024-11-02 12:38:51,481 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 22
[2024-11-02 12:38:51,481 INFO  L207           NwaCegarLoop]: Found error trace
[2024-11-02 12:38:51,481 INFO  L215           NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2024-11-02 12:38:51,482 WARN  L453      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4
[2024-11-02 12:38:51,482 INFO  L396      AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 79 more)] ===
[2024-11-02 12:38:51,483 INFO  L157       PredicateUnifier]: Initialized classic predicate unifier
[2024-11-02 12:38:51,483 INFO  L85        PathProgramCache]: Analyzing trace with hash 1693940425, now seen corresponding path program 1 times
[2024-11-02 12:38:51,483 INFO  L118   FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN
[2024-11-02 12:38:51,483 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [120345884]
[2024-11-02 12:38:51,483 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2024-11-02 12:38:51,484 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2024-11-02 12:38:51,513 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2024-11-02 12:38:51,811 INFO  L134       CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2024-11-02 12:38:51,811 INFO  L136   FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace
[2024-11-02 12:38:51,812 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [120345884]
[2024-11-02 12:38:51,812 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [120345884] provided 0 perfect and 1 imperfect interpolant sequences
[2024-11-02 12:38:51,812 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [531307130]
[2024-11-02 12:38:51,812 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2024-11-02 12:38:51,812 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2024-11-02 12:38:51,813 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab040f40-2a7a-4cbd-aaa7-1b9b6d19f78c/bin/utaipan-verify-DbMuA5NWw2/z3
[2024-11-02 12:38:51,817 INFO  L229       MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab040f40-2a7a-4cbd-aaa7-1b9b6d19f78c/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2024-11-02 12:38:51,819 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab040f40-2a7a-4cbd-aaa7-1b9b6d19f78c/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process
[2024-11-02 12:38:51,954 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2024-11-02 12:38:51,957 INFO  L255         TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 15 conjuncts are in the unsatisfiable core
[2024-11-02 12:38:51,965 INFO  L278         TraceCheckSpWp]: Computing forward predicates...
[2024-11-02 12:38:52,035 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
[2024-11-02 12:38:52,170 WARN  L873   $PredicateComparison]: unable to prove that (exists ((|node_create_~temp~0#1.base| Int)) (and (= |c_#valid| (store |c_old(#valid)| |node_create_~temp~0#1.base| (select |c_#valid| |node_create_~temp~0#1.base|))) (= 0 (select |c_old(#valid)| |node_create_~temp~0#1.base|)))) is different from true
[2024-11-02 12:38:52,271 INFO  L349             Elim1Store]: treesize reduction 20, result has 33.3 percent of original size
[2024-11-02 12:38:52,271 INFO  L378             Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 16
[2024-11-02 12:38:52,295 INFO  L134       CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 5 not checked.
[2024-11-02 12:38:52,296 INFO  L311         TraceCheckSpWp]: Computing backward predicates...
[2024-11-02 12:38:52,398 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [531307130] provided 0 perfect and 1 imperfect interpolant sequences
[2024-11-02 12:38:52,398 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1566098899]
[2024-11-02 12:38:52,432 INFO  L159        IcfgInterpreter]: Started Sifa with 16 locations of interest
[2024-11-02 12:38:52,432 INFO  L166        IcfgInterpreter]: Building call graph
[2024-11-02 12:38:52,445 INFO  L171        IcfgInterpreter]: Initial procedures are [ULTIMATE.start]
[2024-11-02 12:38:52,458 INFO  L176        IcfgInterpreter]: Starting interpretation
[2024-11-02 12:38:52,459 INFO  L197        IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs
[2024-11-02 12:38:53,960 INFO  L197        IcfgInterpreter]: Interpreting procedure node_create with input of size 155 for LOIs
[2024-11-02 12:38:54,795 INFO  L180        IcfgInterpreter]: Interpretation finished
[2024-11-02 12:39:09,997 INFO  L133             SifaRunner]: Sifa could not show that error location is unreachable, found '1777#(and (not (= 0 (select (select |#memory_$Pointer$.base| |ULTIMATE.start_dll_circular_create_~new_head~0#1.base|) 0))) (= (select |#valid| |ULTIMATE.start_dll_circular_create_~new_head~0#1.base|) 1) (<= 1 |#StackHeapBarrier|) (= |ULTIMATE.start_dll_circular_create_~head~0#1.offset| 0) (exists ((|v_#memory_int_87| (Array Int (Array Int Int)))) (= |#memory_int| (store |v_#memory_int_87| |ULTIMATE.start_dll_circular_create_~new_head~0#1.base| (store (select |v_#memory_int_87| |ULTIMATE.start_dll_circular_create_~new_head~0#1.base|) 0 (select (select |#memory_int| |ULTIMATE.start_dll_circular_create_~new_head~0#1.base|) 0))))) (exists ((|v_#memory_$Pointer$.offset_116| (Array Int (Array Int Int)))) (= |#memory_$Pointer$.offset| (store |v_#memory_$Pointer$.offset_116| |ULTIMATE.start_dll_circular_create_~new_head~0#1.base| (store (select |v_#memory_$Pointer$.offset_116| |ULTIMATE.start_dll_circular_create_~new_head~0#1.base|) 0 0)))) (= 2 |ULTIMATE.start_dll_circular_create_~len#1|) (= |ULTIMATE.start_main_~data~0#1| 1) (<= 4 (select |#length| |ULTIMATE.start_dll_circular_create_~new_head~0#1.base|)) (not (= (select |#valid| (select (select |#memory_$Pointer$.base| |ULTIMATE.start_dll_circular_create_~new_head~0#1.base|) 0)) 1)) (= |ULTIMATE.start_main_~#s~0#1.offset| 0) (= |ULTIMATE.start_main_~len~0#1| 2) (= |ULTIMATE.start_dll_circular_create_~last~0#1.offset| 0) (exists ((|v_#memory_$Pointer$.base_116| (Array Int (Array Int Int)))) (= (store |v_#memory_$Pointer$.base_116| |ULTIMATE.start_dll_circular_create_~new_head~0#1.base| (store (select |v_#memory_$Pointer$.base_116| |ULTIMATE.start_dll_circular_create_~new_head~0#1.base|) 0 (select (select |#memory_$Pointer$.base| |ULTIMATE.start_dll_circular_create_~new_head~0#1.base|) 0))) |#memory_$Pointer$.base|)) (= |ULTIMATE.start_dll_circular_create_~new_head~0#1.offset| 0) (<= 2 |ULTIMATE.start_main_~#s~0#1.base|) (= |ULTIMATE.start_dll_circular_create_~data#1| 1))' at error location
[2024-11-02 12:39:09,997 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED
[2024-11-02 12:39:09,997 INFO  L185   FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences.
[2024-11-02 12:39:09,998 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7] total 10
[2024-11-02 12:39:09,998 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2068211144]
[2024-11-02 12:39:09,998 INFO  L85    oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton
[2024-11-02 12:39:09,999 INFO  L548      AbstractCegarLoop]: INTERPOLANT automaton has 11 states
[2024-11-02 12:39:09,999 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN
[2024-11-02 12:39:09,999 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants.
[2024-11-02 12:39:10,000 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=476, Unknown=3, NotChecked=44, Total=600
[2024-11-02 12:39:10,000 INFO  L87              Difference]: Start difference. First operand 148 states and 161 transitions. Second operand  has 11 states, 8 states have (on average 2.75) internal successors, (22), 9 states have internal predecessors, (22), 2 states have call successors, (2), 2 states have call predecessors, (2), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3)
[2024-11-02 12:39:11,502 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2024-11-02 12:39:11,502 INFO  L93              Difference]: Finished difference Result 153 states and 169 transitions.
[2024-11-02 12:39:11,503 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. 
[2024-11-02 12:39:11,504 INFO  L78                 Accepts]: Start accepts. Automaton has  has 11 states, 8 states have (on average 2.75) internal successors, (22), 9 states have internal predecessors, (22), 2 states have call successors, (2), 2 states have call predecessors, (2), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 21
[2024-11-02 12:39:11,504 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2024-11-02 12:39:11,505 INFO  L225             Difference]: With dead ends: 153
[2024-11-02 12:39:11,506 INFO  L226             Difference]: Without dead ends: 153
[2024-11-02 12:39:11,506 INFO  L431           NwaCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 15.5s TimeCoverageRelationStatistics Valid=91, Invalid=560, Unknown=3, NotChecked=48, Total=702
[2024-11-02 12:39:11,507 INFO  L432           NwaCegarLoop]: 130 mSDtfsCounter, 1 mSDsluCounter, 414 mSDsCounter, 0 mSdLazyCounter, 558 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 544 SdHoareTripleChecker+Invalid, 729 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 558 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 164 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time
[2024-11-02 12:39:11,511 INFO  L433           NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 544 Invalid, 729 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 558 Invalid, 0 Unknown, 164 Unchecked, 1.3s Time]
[2024-11-02 12:39:11,511 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 153 states.
[2024-11-02 12:39:11,520 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 153.
[2024-11-02 12:39:11,520 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 153 states, 74 states have (on average 2.175675675675676) internal successors, (161), 147 states have internal predecessors, (161), 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)
[2024-11-02 12:39:11,521 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 169 transitions.
[2024-11-02 12:39:11,525 INFO  L78                 Accepts]: Start accepts. Automaton has 153 states and 169 transitions. Word has length 21
[2024-11-02 12:39:11,525 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2024-11-02 12:39:11,525 INFO  L471      AbstractCegarLoop]: Abstraction has 153 states and 169 transitions.
[2024-11-02 12:39:11,526 INFO  L472      AbstractCegarLoop]: INTERPOLANT automaton has  has 11 states, 8 states have (on average 2.75) internal successors, (22), 9 states have internal predecessors, (22), 2 states have call successors, (2), 2 states have call predecessors, (2), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3)
[2024-11-02 12:39:11,526 INFO  L276                IsEmpty]: Start isEmpty. Operand 153 states and 169 transitions.
[2024-11-02 12:39:11,526 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 22
[2024-11-02 12:39:11,526 INFO  L207           NwaCegarLoop]: Found error trace
[2024-11-02 12:39:11,526 INFO  L215           NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2024-11-02 12:39:11,554 INFO  L552       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab040f40-2a7a-4cbd-aaa7-1b9b6d19f78c/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0
[2024-11-02 12:39:11,727 WARN  L453      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab040f40-2a7a-4cbd-aaa7-1b9b6d19f78c/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5
[2024-11-02 12:39:11,728 INFO  L396      AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 79 more)] ===
[2024-11-02 12:39:11,731 INFO  L157       PredicateUnifier]: Initialized classic predicate unifier
[2024-11-02 12:39:11,732 INFO  L85        PathProgramCache]: Analyzing trace with hash 1693940426, now seen corresponding path program 1 times
[2024-11-02 12:39:11,732 INFO  L118   FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN
[2024-11-02 12:39:11,733 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [638336828]
[2024-11-02 12:39:11,733 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2024-11-02 12:39:11,733 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2024-11-02 12:39:11,767 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2024-11-02 12:39:12,551 INFO  L134       CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2024-11-02 12:39:12,551 INFO  L136   FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace
[2024-11-02 12:39:12,552 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [638336828]
[2024-11-02 12:39:12,552 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [638336828] provided 0 perfect and 1 imperfect interpolant sequences
[2024-11-02 12:39:12,552 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1677434444]
[2024-11-02 12:39:12,552 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2024-11-02 12:39:12,552 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2024-11-02 12:39:12,552 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab040f40-2a7a-4cbd-aaa7-1b9b6d19f78c/bin/utaipan-verify-DbMuA5NWw2/z3
[2024-11-02 12:39:12,555 INFO  L229       MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab040f40-2a7a-4cbd-aaa7-1b9b6d19f78c/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2024-11-02 12:39:12,566 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab040f40-2a7a-4cbd-aaa7-1b9b6d19f78c/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process
[2024-11-02 12:39:12,699 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2024-11-02 12:39:12,701 INFO  L255         TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 27 conjuncts are in the unsatisfiable core
[2024-11-02 12:39:12,704 INFO  L278         TraceCheckSpWp]: Computing forward predicates...
[2024-11-02 12:39:12,729 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
[2024-11-02 12:39:12,741 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 8 treesize of output 1
[2024-11-02 12:39:12,866 WARN  L873   $PredicateComparison]: unable to prove that (exists ((|node_create_~temp~0#1.base| Int)) (and (= (store |c_old(#length)| |node_create_~temp~0#1.base| (select |c_#length| |node_create_~temp~0#1.base|)) |c_#length|) (= 0 (select |c_old(#valid)| |node_create_~temp~0#1.base|)))) is different from true
[2024-11-02 12:39:12,926 INFO  L190   IndexEqualityManager]: detected not equals via solver
[2024-11-02 12:39:12,928 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
[2024-11-02 12:39:12,951 INFO  L349             Elim1Store]: treesize reduction 4, result has 50.0 percent of original size
[2024-11-02 12:39:12,951 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
[2024-11-02 12:39:12,979 INFO  L134       CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 5 not checked.
[2024-11-02 12:39:12,979 INFO  L311         TraceCheckSpWp]: Computing backward predicates...
[2024-11-02 12:39:13,228 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1677434444] provided 0 perfect and 1 imperfect interpolant sequences
[2024-11-02 12:39:13,229 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [94811905]
[2024-11-02 12:39:13,231 INFO  L159        IcfgInterpreter]: Started Sifa with 16 locations of interest
[2024-11-02 12:39:13,231 INFO  L166        IcfgInterpreter]: Building call graph
[2024-11-02 12:39:13,232 INFO  L171        IcfgInterpreter]: Initial procedures are [ULTIMATE.start]
[2024-11-02 12:39:13,232 INFO  L176        IcfgInterpreter]: Starting interpretation
[2024-11-02 12:39:13,232 INFO  L197        IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs
[2024-11-02 12:39:13,973 INFO  L197        IcfgInterpreter]: Interpreting procedure node_create with input of size 155 for LOIs
[2024-11-02 12:39:14,627 INFO  L180        IcfgInterpreter]: Interpretation finished