./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/list-properties/list_search-1.i --full-output --architecture 32bit
--------------------------------------------------------------------------------
Checking for ERROR reachability
Using default analysis
Version 9bd2c7ff
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_179c64d9-2519-4036-a3c1-ef814ff5221f/bin/uautomizer-verify-uCwYo4JHxu/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_179c64d9-2519-4036-a3c1-ef814ff5221f/bin/uautomizer-verify-uCwYo4JHxu/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_179c64d9-2519-4036-a3c1-ef814ff5221f/bin/uautomizer-verify-uCwYo4JHxu/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_179c64d9-2519-4036-a3c1-ef814ff5221f/bin/uautomizer-verify-uCwYo4JHxu/config/AutomizerReach.xml -i ../../sv-benchmarks/c/list-properties/list_search-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_179c64d9-2519-4036-a3c1-ef814ff5221f/bin/uautomizer-verify-uCwYo4JHxu/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_179c64d9-2519-4036-a3c1-ef814ff5221f/bin/uautomizer-verify-uCwYo4JHxu --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) )
--witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash ef935aaf7590747bfbe771bbb249e6b84337edbf0e97024d9de82d0d23d44f30
--- Real Ultimate output ---
This is Ultimate 0.2.3-dev-9bd2c7f
[2023-11-19 07:39:06,026 INFO L188 SettingsManager]: Resetting all preferences to default values...
[2023-11-19 07:39:06,089 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_179c64d9-2519-4036-a3c1-ef814ff5221f/bin/uautomizer-verify-uCwYo4JHxu/config/svcomp-Reach-32bit-Automizer_Default.epf
[2023-11-19 07:39:06,094 WARN L101 SettingsManager]: Preference file contains the following unknown settings:
[2023-11-19 07:39:06,095 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class
[2023-11-19 07:39:06,120 INFO L130 SettingsManager]: Preferences different from defaults after loading the file:
[2023-11-19 07:39:06,121 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults:
[2023-11-19 07:39:06,122 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR;
[2023-11-19 07:39:06,122 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults:
[2023-11-19 07:39:06,123 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS
[2023-11-19 07:39:06,124 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults:
[2023-11-19 07:39:06,125 INFO L153 SettingsManager]: * Create parallel compositions if possible=false
[2023-11-19 07:39:06,125 INFO L153 SettingsManager]: * Use SBE=true
[2023-11-19 07:39:06,126 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults:
[2023-11-19 07:39:06,127 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE
[2023-11-19 07:39:06,128 INFO L153 SettingsManager]: * sizeof long=4
[2023-11-19 07:39:06,128 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true
[2023-11-19 07:39:06,129 INFO L153 SettingsManager]: * sizeof POINTER=4
[2023-11-19 07:39:06,129 INFO L153 SettingsManager]: * Check division by zero=IGNORE
[2023-11-19 07:39:06,130 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE
[2023-11-19 07:39:06,131 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE
[2023-11-19 07:39:06,131 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE
[2023-11-19 07:39:06,132 INFO L153 SettingsManager]: * sizeof long double=12
[2023-11-19 07:39:06,133 INFO L153 SettingsManager]: * Check if freed pointer was valid=false
[2023-11-19 07:39:06,133 INFO L153 SettingsManager]: * Use constant arrays=true
[2023-11-19 07:39:06,134 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults:
[2023-11-19 07:39:06,134 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements
[2023-11-19 07:39:06,135 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode
[2023-11-19 07:39:06,135 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2023-11-19 07:39:06,136 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults:
[2023-11-19 07:39:06,136 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP
[2023-11-19 07:39:06,137 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads
[2023-11-19 07:39:06,137 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL
[2023-11-19 07:39:06,137 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2023-11-19 07:39:06,138 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET
[2023-11-19 07:39:06,138 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true
[2023-11-19 07:39:06,138 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO
[2023-11-19 07:39:06,138 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode
[2023-11-19 07:39:06,139 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC
[2023-11-19 07:39:06,139 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC
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_179c64d9-2519-4036-a3c1-ef814ff5221f/bin/uautomizer-verify-uCwYo4JHxu/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$1
WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations
WARNING: All illegal access operations will be denied in a future release
Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main
Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_179c64d9-2519-4036-a3c1-ef814ff5221f/bin/uautomizer-verify-uCwYo4JHxu
Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness
Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false
Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) )
Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer
Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit
Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ef935aaf7590747bfbe771bbb249e6b84337edbf0e97024d9de82d0d23d44f30
[2023-11-19 07:39:06,383 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp
[2023-11-19 07:39:06,405 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized
[2023-11-19 07:39:06,408 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected.
[2023-11-19 07:39:06,410 INFO L270 PluginConnector]: Initializing CDTParser...
[2023-11-19 07:39:06,410 INFO L274 PluginConnector]: CDTParser initialized
[2023-11-19 07:39:06,412 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_179c64d9-2519-4036-a3c1-ef814ff5221f/bin/uautomizer-verify-uCwYo4JHxu/../../sv-benchmarks/c/list-properties/list_search-1.i
[2023-11-19 07:39:09,501 INFO L533 CDTParser]: Created temporary CDT project at NULL
[2023-11-19 07:39:09,763 INFO L384 CDTParser]: Found 1 translation units.
[2023-11-19 07:39:09,764 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_179c64d9-2519-4036-a3c1-ef814ff5221f/sv-benchmarks/c/list-properties/list_search-1.i
[2023-11-19 07:39:09,800 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_179c64d9-2519-4036-a3c1-ef814ff5221f/bin/uautomizer-verify-uCwYo4JHxu/data/ef775bb5f/5e4b238a3bc34b18bac1d75b5bdabdc2/FLAGd265005ee
[2023-11-19 07:39:09,814 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_179c64d9-2519-4036-a3c1-ef814ff5221f/bin/uautomizer-verify-uCwYo4JHxu/data/ef775bb5f/5e4b238a3bc34b18bac1d75b5bdabdc2
[2023-11-19 07:39:09,817 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] #######################
[2023-11-19 07:39:09,818 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements.
[2023-11-19 07:39:09,820 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator----------------------------
[2023-11-19 07:39:09,820 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator...
[2023-11-19 07:39:09,824 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized
[2023-11-19 07:39:09,825 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:39:09" (1/1) ...
[2023-11-19 07:39:09,826 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@16a844da and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:39:09, skipping insertion in model container
[2023-11-19 07:39:09,826 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:39:09" (1/1) ...
[2023-11-19 07:39:09,876 INFO L177 MainTranslator]: Built tables and reachable declarations
[2023-11-19 07:39:10,072 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_179c64d9-2519-4036-a3c1-ef814ff5221f/sv-benchmarks/c/list-properties/list_search-1.i[813,826]
[2023-11-19 07:39:10,252 INFO L209 PostProcessor]: Analyzing one entry point: main
[2023-11-19 07:39:10,262 INFO L202 MainTranslator]: Completed pre-run
[2023-11-19 07:39:10,275 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_179c64d9-2519-4036-a3c1-ef814ff5221f/sv-benchmarks/c/list-properties/list_search-1.i[813,826]
[2023-11-19 07:39:10,327 INFO L209 PostProcessor]: Analyzing one entry point: main
[2023-11-19 07:39:10,359 INFO L206 MainTranslator]: Completed translation
[2023-11-19 07:39:10,360 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:39:10 WrapperNode
[2023-11-19 07:39:10,360 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator----------------------------
[2023-11-19 07:39:10,361 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner----------------------------
[2023-11-19 07:39:10,361 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner...
[2023-11-19 07:39:10,361 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized
[2023-11-19 07:39:10,369 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:39:10" (1/1) ...
[2023-11-19 07:39:10,408 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:39:10" (1/1) ...
[2023-11-19 07:39:10,429 INFO L138 Inliner]: procedures = 125, calls = 22, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 66
[2023-11-19 07:39:10,430 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner----------------------------
[2023-11-19 07:39:10,430 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor----------------------------
[2023-11-19 07:39:10,430 INFO L270 PluginConnector]: Initializing Boogie Preprocessor...
[2023-11-19 07:39:10,431 INFO L274 PluginConnector]: Boogie Preprocessor initialized
[2023-11-19 07:39:10,440 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:39:10" (1/1) ...
[2023-11-19 07:39:10,440 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:39:10" (1/1) ...
[2023-11-19 07:39:10,443 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:39:10" (1/1) ...
[2023-11-19 07:39:10,444 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:39:10" (1/1) ...
[2023-11-19 07:39:10,450 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:39:10" (1/1) ...
[2023-11-19 07:39:10,454 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:39:10" (1/1) ...
[2023-11-19 07:39:10,456 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:39:10" (1/1) ...
[2023-11-19 07:39:10,457 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:39:10" (1/1) ...
[2023-11-19 07:39:10,460 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor----------------------------
[2023-11-19 07:39:10,460 INFO L112 PluginConnector]: ------------------------RCFGBuilder----------------------------
[2023-11-19 07:39:10,461 INFO L270 PluginConnector]: Initializing RCFGBuilder...
[2023-11-19 07:39:10,461 INFO L274 PluginConnector]: RCFGBuilder initialized
[2023-11-19 07:39:10,463 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:39:10" (1/1) ...
[2023-11-19 07:39:10,469 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2023-11-19 07:39:10,479 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_179c64d9-2519-4036-a3c1-ef814ff5221f/bin/uautomizer-verify-uCwYo4JHxu/z3
[2023-11-19 07:39:10,491 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_179c64d9-2519-4036-a3c1-ef814ff5221f/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null)
[2023-11-19 07:39:10,525 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_179c64d9-2519-4036-a3c1-ef814ff5221f/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process
[2023-11-19 07:39:10,547 INFO L130 BoogieDeclarations]: Found specification of procedure read~int
[2023-11-19 07:39:10,547 INFO L130 BoogieDeclarations]: Found specification of procedure write~int
[2023-11-19 07:39:10,548 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap
[2023-11-19 07:39:10,548 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit
[2023-11-19 07:39:10,549 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$
[2023-11-19 07:39:10,549 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$
[2023-11-19 07:39:10,549 INFO L130 BoogieDeclarations]: Found specification of procedure insert_list
[2023-11-19 07:39:10,549 INFO L138 BoogieDeclarations]: Found implementation of procedure insert_list
[2023-11-19 07:39:10,550 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc
[2023-11-19 07:39:10,550 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int
[2023-11-19 07:39:10,550 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start
[2023-11-19 07:39:10,550 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start
[2023-11-19 07:39:10,701 INFO L236 CfgBuilder]: Building ICFG
[2023-11-19 07:39:10,703 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation
[2023-11-19 07:39:10,869 INFO L277 CfgBuilder]: Performing block encoding
[2023-11-19 07:39:10,876 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start)
[2023-11-19 07:39:10,876 INFO L302 CfgBuilder]: Removed 2 assume(true) statements.
[2023-11-19 07:39:10,880 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:39:10 BoogieIcfgContainer
[2023-11-19 07:39:10,880 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder----------------------------
[2023-11-19 07:39:10,882 INFO L112 PluginConnector]: ------------------------TraceAbstraction----------------------------
[2023-11-19 07:39:10,882 INFO L270 PluginConnector]: Initializing TraceAbstraction...
[2023-11-19 07:39:10,885 INFO L274 PluginConnector]: TraceAbstraction initialized
[2023-11-19 07:39:10,885 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 07:39:09" (1/3) ...
[2023-11-19 07:39:10,886 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@75d100ae and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 07:39:10, skipping insertion in model container
[2023-11-19 07:39:10,886 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:39:10" (2/3) ...
[2023-11-19 07:39:10,887 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@75d100ae and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 07:39:10, skipping insertion in model container
[2023-11-19 07:39:10,887 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:39:10" (3/3) ...
[2023-11-19 07:39:10,888 INFO L112 eAbstractionObserver]: Analyzing ICFG list_search-1.i
[2023-11-19 07:39:10,902 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION
[2023-11-19 07:39:10,903 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations.
[2023-11-19 07:39:10,945 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ========
[2023-11-19 07:39:10,952 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=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopHeads, 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;@54a6f8f2, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=<UNSUPPORTED>, UseSemiCommutativity=<UNSUPPORTED>, Solver=<NOT_USED>, SolverTimeout=<NOT_USED>]
[2023-11-19 07:39:10,952 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations.
[2023-11-19 07:39:10,956 INFO L276 IsEmpty]: Start isEmpty. Operand has 28 states, 21 states have (on average 1.380952380952381) internal successors, (29), 22 states have internal predecessors, (29), 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)
[2023-11-19 07:39:10,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36
[2023-11-19 07:39:10,964 INFO L187 NwaCegarLoop]: Found error trace
[2023-11-19 07:39:10,965 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2023-11-19 07:39:10,966 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-19 07:39:10,971 INFO L160 PredicateUnifier]: Initialized classic predicate unifier
[2023-11-19 07:39:10,971 INFO L85 PathProgramCache]: Analyzing trace with hash -547062782, now seen corresponding path program 1 times
[2023-11-19 07:39:10,980 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-19 07:39:10,981 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1152550366]
[2023-11-19 07:39:10,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-19 07:39:10,982 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-19 07:39:11,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-19 07:39:11,671 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2
[2023-11-19 07:39:11,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-19 07:39:11,809 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9
[2023-11-19 07:39:11,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-19 07:39:11,938 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16
[2023-11-19 07:39:11,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-19 07:39:11,969 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23
[2023-11-19 07:39:11,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-19 07:39:12,001 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked.
[2023-11-19 07:39:12,003 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-19 07:39:12,003 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1152550366]
[2023-11-19 07:39:12,004 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1152550366] provided 0 perfect and 1 imperfect interpolant sequences
[2023-11-19 07:39:12,005 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1664921095]
[2023-11-19 07:39:12,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-19 07:39:12,005 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-19 07:39:12,006 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_179c64d9-2519-4036-a3c1-ef814ff5221f/bin/uautomizer-verify-uCwYo4JHxu/z3
[2023-11-19 07:39:12,012 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_179c64d9-2519-4036-a3c1-ef814ff5221f/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-19 07:39:12,043 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_179c64d9-2519-4036-a3c1-ef814ff5221f/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process
[2023-11-19 07:39:12,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-19 07:39:12,233 INFO L262 TraceCheckSpWp]: Trace formula consists of 360 conjuncts, 1 conjunts are in the unsatisfiable core
[2023-11-19 07:39:12,241 INFO L285 TraceCheckSpWp]: Computing forward predicates...
[2023-11-19 07:39:12,279 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked.
[2023-11-19 07:39:12,279 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-19 07:39:12,279 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1664921095] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-19 07:39:12,279 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences.
[2023-11-19 07:39:12,280 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [7] total 7
[2023-11-19 07:39:12,282 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1383019003]
[2023-11-19 07:39:12,283 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-19 07:39:12,288 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states
[2023-11-19 07:39:12,288 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-19 07:39:12,328 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants.
[2023-11-19 07:39:12,329 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42
[2023-11-19 07:39:12,331 INFO L87 Difference]: Start difference. First operand has 28 states, 21 states have (on average 1.380952380952381) internal successors, (29), 22 states have internal predecessors, (29), 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) Second operand has 2 states, 2 states have (on average 7.5) internal successors, (15), 2 states have internal predecessors, (15), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4)
[2023-11-19 07:39:12,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-19 07:39:12,354 INFO L93 Difference]: Finished difference Result 38 states and 49 transitions.
[2023-11-19 07:39:12,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states.
[2023-11-19 07:39:12,356 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 7.5) internal successors, (15), 2 states have internal predecessors, (15), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 35
[2023-11-19 07:39:12,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-19 07:39:12,363 INFO L225 Difference]: With dead ends: 38
[2023-11-19 07:39:12,364 INFO L226 Difference]: Without dead ends: 23
[2023-11-19 07:39:12,367 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42
[2023-11-19 07:39:12,370 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time
[2023-11-19 07:39:12,372 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time]
[2023-11-19 07:39:12,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states.
[2023-11-19 07:39:12,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23.
[2023-11-19 07:39:12,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 17 states have (on average 1.1764705882352942) internal successors, (20), 17 states have internal predecessors, (20), 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)
[2023-11-19 07:39:12,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 28 transitions.
[2023-11-19 07:39:12,412 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 28 transitions. Word has length 35
[2023-11-19 07:39:12,414 INFO L84 Accepts]: Finished accepts. word is rejected.
[2023-11-19 07:39:12,414 INFO L495 AbstractCegarLoop]: Abstraction has 23 states and 28 transitions.
[2023-11-19 07:39:12,414 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 7.5) internal successors, (15), 2 states have internal predecessors, (15), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4)
[2023-11-19 07:39:12,415 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 28 transitions.
[2023-11-19 07:39:12,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38
[2023-11-19 07:39:12,418 INFO L187 NwaCegarLoop]: Found error trace
[2023-11-19 07:39:12,418 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2023-11-19 07:39:12,443 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_179c64d9-2519-4036-a3c1-ef814ff5221f/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0
[2023-11-19 07:39:12,640 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_179c64d9-2519-4036-a3c1-ef814ff5221f/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-19 07:39:12,640 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-19 07:39:12,641 INFO L160 PredicateUnifier]: Initialized classic predicate unifier
[2023-11-19 07:39:12,641 INFO L85 PathProgramCache]: Analyzing trace with hash -745059685, now seen corresponding path program 1 times
[2023-11-19 07:39:12,641 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-19 07:39:12,642 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1429102724]
[2023-11-19 07:39:12,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-19 07:39:12,642 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-19 07:39:12,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-19 07:39:12,797 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2
[2023-11-19 07:39:12,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-19 07:39:12,834 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9
[2023-11-19 07:39:12,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-19 07:39:12,874 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16
[2023-11-19 07:39:12,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-19 07:39:12,888 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23
[2023-11-19 07:39:12,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-19 07:39:12,901 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked.
[2023-11-19 07:39:12,902 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-19 07:39:12,902 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1429102724]
[2023-11-19 07:39:12,902 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1429102724] provided 0 perfect and 1 imperfect interpolant sequences
[2023-11-19 07:39:12,902 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [30884106]
[2023-11-19 07:39:12,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-19 07:39:12,903 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-19 07:39:12,903 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_179c64d9-2519-4036-a3c1-ef814ff5221f/bin/uautomizer-verify-uCwYo4JHxu/z3
[2023-11-19 07:39:12,904 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_179c64d9-2519-4036-a3c1-ef814ff5221f/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-19 07:39:12,923 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_179c64d9-2519-4036-a3c1-ef814ff5221f/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process
[2023-11-19 07:39:13,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-19 07:39:13,086 INFO L262 TraceCheckSpWp]: Trace formula consists of 365 conjuncts, 26 conjunts are in the unsatisfiable core
[2023-11-19 07:39:13,094 INFO L285 TraceCheckSpWp]: Computing forward predicates...
[2023-11-19 07:39:13,188 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1
[2023-11-19 07:39:13,226 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 23 treesize of output 11
[2023-11-19 07:39:13,385 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7
[2023-11-19 07:39:13,423 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked.
[2023-11-19 07:39:13,423 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-19 07:39:13,424 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [30884106] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-19 07:39:13,424 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences.
[2023-11-19 07:39:13,424 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 12
[2023-11-19 07:39:13,425 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1879772714]
[2023-11-19 07:39:13,425 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-19 07:39:13,426 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states
[2023-11-19 07:39:13,427 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-19 07:39:13,428 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants.
[2023-11-19 07:39:13,429 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132
[2023-11-19 07:39:13,430 INFO L87 Difference]: Start difference. First operand 23 states and 28 transitions. Second operand has 7 states, 7 states have (on average 3.0) internal successors, (21), 6 states have internal predecessors, (21), 1 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4)
[2023-11-19 07:39:13,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-19 07:39:13,691 INFO L93 Difference]: Finished difference Result 51 states and 65 transitions.
[2023-11-19 07:39:13,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states.
[2023-11-19 07:39:13,692 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.0) internal successors, (21), 6 states have internal predecessors, (21), 1 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) Word has length 37
[2023-11-19 07:39:13,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-19 07:39:13,696 INFO L225 Difference]: With dead ends: 51
[2023-11-19 07:39:13,696 INFO L226 Difference]: Without dead ends: 46
[2023-11-19 07:39:13,699 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240
[2023-11-19 07:39:13,702 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 26 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 108 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 112 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 108 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2023-11-19 07:39:13,705 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 76 Invalid, 112 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 108 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2023-11-19 07:39:13,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states.
[2023-11-19 07:39:13,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 30.
[2023-11-19 07:39:13,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 23 states have (on average 1.173913043478261) internal successors, (27), 23 states have internal predecessors, (27), 4 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8)
[2023-11-19 07:39:13,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 39 transitions.
[2023-11-19 07:39:13,723 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 39 transitions. Word has length 37
[2023-11-19 07:39:13,724 INFO L84 Accepts]: Finished accepts. word is rejected.
[2023-11-19 07:39:13,731 INFO L495 AbstractCegarLoop]: Abstraction has 30 states and 39 transitions.
[2023-11-19 07:39:13,731 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.0) internal successors, (21), 6 states have internal predecessors, (21), 1 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4)
[2023-11-19 07:39:13,731 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 39 transitions.
[2023-11-19 07:39:13,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38
[2023-11-19 07:39:13,734 INFO L187 NwaCegarLoop]: Found error trace
[2023-11-19 07:39:13,735 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2023-11-19 07:39:13,753 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_179c64d9-2519-4036-a3c1-ef814ff5221f/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0
[2023-11-19 07:39:13,947 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_179c64d9-2519-4036-a3c1-ef814ff5221f/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-19 07:39:13,948 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-19 07:39:13,948 INFO L160 PredicateUnifier]: Initialized classic predicate unifier
[2023-11-19 07:39:13,948 INFO L85 PathProgramCache]: Analyzing trace with hash -687801383, now seen corresponding path program 1 times
[2023-11-19 07:39:13,949 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-19 07:39:13,949 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1666163]
[2023-11-19 07:39:13,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-19 07:39:13,949 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-19 07:39:13,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-19 07:39:14,086 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2
[2023-11-19 07:39:14,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-19 07:39:14,132 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9
[2023-11-19 07:39:14,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-19 07:39:14,169 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16
[2023-11-19 07:39:14,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-19 07:39:14,181 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23
[2023-11-19 07:39:14,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-19 07:39:14,195 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked.
[2023-11-19 07:39:14,195 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-19 07:39:14,195 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1666163]
[2023-11-19 07:39:14,196 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1666163] provided 0 perfect and 1 imperfect interpolant sequences
[2023-11-19 07:39:14,196 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [190664004]
[2023-11-19 07:39:14,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-19 07:39:14,196 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-19 07:39:14,196 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_179c64d9-2519-4036-a3c1-ef814ff5221f/bin/uautomizer-verify-uCwYo4JHxu/z3
[2023-11-19 07:39:14,201 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_179c64d9-2519-4036-a3c1-ef814ff5221f/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-19 07:39:14,215 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_179c64d9-2519-4036-a3c1-ef814ff5221f/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process
[2023-11-19 07:39:14,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-19 07:39:14,384 INFO L262 TraceCheckSpWp]: Trace formula consists of 362 conjuncts, 9 conjunts are in the unsatisfiable core
[2023-11-19 07:39:14,387 INFO L285 TraceCheckSpWp]: Computing forward predicates...
[2023-11-19 07:39:14,411 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 19 proven. 4 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked.
[2023-11-19 07:39:14,411 INFO L327 TraceCheckSpWp]: Computing backward predicates...
[2023-11-19 07:39:14,490 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 19 proven. 4 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked.
[2023-11-19 07:39:14,490 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [190664004] provided 0 perfect and 2 imperfect interpolant sequences
[2023-11-19 07:39:14,491 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences.
[2023-11-19 07:39:14,491 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 8
[2023-11-19 07:39:14,491 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [904452048]
[2023-11-19 07:39:14,491 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton
[2023-11-19 07:39:14,492 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states
[2023-11-19 07:39:14,492 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-19 07:39:14,493 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants.
[2023-11-19 07:39:14,493 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56
[2023-11-19 07:39:14,494 INFO L87 Difference]: Start difference. First operand 30 states and 39 transitions. Second operand has 8 states, 8 states have (on average 4.125) internal successors, (33), 7 states have internal predecessors, (33), 3 states have call successors, (9), 4 states have call predecessors, (9), 3 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8)
[2023-11-19 07:39:14,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-19 07:39:14,645 INFO L93 Difference]: Finished difference Result 54 states and 68 transitions.
[2023-11-19 07:39:14,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states.
[2023-11-19 07:39:14,646 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.125) internal successors, (33), 7 states have internal predecessors, (33), 3 states have call successors, (9), 4 states have call predecessors, (9), 3 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) Word has length 37
[2023-11-19 07:39:14,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-19 07:39:14,647 INFO L225 Difference]: With dead ends: 54
[2023-11-19 07:39:14,647 INFO L226 Difference]: Without dead ends: 29
[2023-11-19 07:39:14,648 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182
[2023-11-19 07:39:14,650 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 23 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2023-11-19 07:39:14,650 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 92 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2023-11-19 07:39:14,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states.
[2023-11-19 07:39:14,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 28.
[2023-11-19 07:39:14,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 21 states have (on average 1.1428571428571428) internal successors, (24), 21 states have internal predecessors, (24), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5)
[2023-11-19 07:39:14,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 33 transitions.
[2023-11-19 07:39:14,657 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 33 transitions. Word has length 37
[2023-11-19 07:39:14,658 INFO L84 Accepts]: Finished accepts. word is rejected.
[2023-11-19 07:39:14,658 INFO L495 AbstractCegarLoop]: Abstraction has 28 states and 33 transitions.
[2023-11-19 07:39:14,658 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.125) internal successors, (33), 7 states have internal predecessors, (33), 3 states have call successors, (9), 4 states have call predecessors, (9), 3 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8)
[2023-11-19 07:39:14,658 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 33 transitions.
[2023-11-19 07:39:14,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38
[2023-11-19 07:39:14,660 INFO L187 NwaCegarLoop]: Found error trace
[2023-11-19 07:39:14,660 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2023-11-19 07:39:14,692 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_179c64d9-2519-4036-a3c1-ef814ff5221f/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0
[2023-11-19 07:39:14,879 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_179c64d9-2519-4036-a3c1-ef814ff5221f/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-19 07:39:14,880 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-19 07:39:14,880 INFO L160 PredicateUnifier]: Initialized classic predicate unifier
[2023-11-19 07:39:14,881 INFO L85 PathProgramCache]: Analyzing trace with hash -2113798375, now seen corresponding path program 1 times
[2023-11-19 07:39:14,881 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-19 07:39:14,881 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [828720284]
[2023-11-19 07:39:14,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-19 07:39:14,881 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-19 07:39:14,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-19 07:39:15,372 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2
[2023-11-19 07:39:15,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-19 07:39:15,382 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9
[2023-11-19 07:39:15,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-19 07:39:15,392 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16
[2023-11-19 07:39:15,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-19 07:39:15,405 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23
[2023-11-19 07:39:15,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-19 07:39:15,511 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked.
[2023-11-19 07:39:15,512 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-19 07:39:15,512 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [828720284]
[2023-11-19 07:39:15,512 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [828720284] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-19 07:39:15,512 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-19 07:39:15,512 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9
[2023-11-19 07:39:15,512 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1114520827]
[2023-11-19 07:39:15,513 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-19 07:39:15,514 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states
[2023-11-19 07:39:15,514 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-19 07:39:15,515 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants.
[2023-11-19 07:39:15,515 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72
[2023-11-19 07:39:15,515 INFO L87 Difference]: Start difference. First operand 28 states and 33 transitions. Second operand has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 7 states have internal predecessors, (22), 1 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4)
[2023-11-19 07:39:15,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-19 07:39:15,704 INFO L93 Difference]: Finished difference Result 40 states and 47 transitions.
[2023-11-19 07:39:15,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states.
[2023-11-19 07:39:15,705 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 7 states have internal predecessors, (22), 1 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) Word has length 37
[2023-11-19 07:39:15,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-19 07:39:15,706 INFO L225 Difference]: With dead ends: 40
[2023-11-19 07:39:15,706 INFO L226 Difference]: Without dead ends: 35
[2023-11-19 07:39:15,706 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182
[2023-11-19 07:39:15,708 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 32 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 120 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 124 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 120 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2023-11-19 07:39:15,708 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 76 Invalid, 124 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 120 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2023-11-19 07:39:15,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states.
[2023-11-19 07:39:15,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 31.
[2023-11-19 07:39:15,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 24 states have (on average 1.1666666666666667) internal successors, (28), 24 states have internal predecessors, (28), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5)
[2023-11-19 07:39:15,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 37 transitions.
[2023-11-19 07:39:15,716 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 37 transitions. Word has length 37
[2023-11-19 07:39:15,717 INFO L84 Accepts]: Finished accepts. word is rejected.
[2023-11-19 07:39:15,717 INFO L495 AbstractCegarLoop]: Abstraction has 31 states and 37 transitions.
[2023-11-19 07:39:15,717 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 7 states have internal predecessors, (22), 1 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4)
[2023-11-19 07:39:15,717 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 37 transitions.
[2023-11-19 07:39:15,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38
[2023-11-19 07:39:15,719 INFO L187 NwaCegarLoop]: Found error trace
[2023-11-19 07:39:15,719 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2023-11-19 07:39:15,719 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3
[2023-11-19 07:39:15,720 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-19 07:39:15,720 INFO L160 PredicateUnifier]: Initialized classic predicate unifier
[2023-11-19 07:39:15,720 INFO L85 PathProgramCache]: Analyzing trace with hash -2056540073, now seen corresponding path program 1 times
[2023-11-19 07:39:15,720 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-19 07:39:15,721 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1382269748]
[2023-11-19 07:39:15,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-19 07:39:15,721 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-19 07:39:15,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-19 07:39:15,902 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2
[2023-11-19 07:39:15,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-19 07:39:15,912 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9
[2023-11-19 07:39:15,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-19 07:39:15,925 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16
[2023-11-19 07:39:15,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-19 07:39:15,938 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23
[2023-11-19 07:39:15,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-19 07:39:15,981 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked.
[2023-11-19 07:39:15,981 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-19 07:39:15,982 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1382269748]
[2023-11-19 07:39:15,982 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1382269748] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-19 07:39:15,982 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-19 07:39:15,982 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7
[2023-11-19 07:39:15,983 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [476823958]
[2023-11-19 07:39:15,983 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-19 07:39:15,983 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states
[2023-11-19 07:39:15,984 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-19 07:39:15,984 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants.
[2023-11-19 07:39:15,985 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42
[2023-11-19 07:39:15,985 INFO L87 Difference]: Start difference. First operand 31 states and 37 transitions. Second operand has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 6 states have internal predecessors, (22), 1 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4)
[2023-11-19 07:39:16,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-19 07:39:16,124 INFO L93 Difference]: Finished difference Result 40 states and 47 transitions.
[2023-11-19 07:39:16,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states.
[2023-11-19 07:39:16,125 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 6 states have internal predecessors, (22), 1 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) Word has length 37
[2023-11-19 07:39:16,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-19 07:39:16,128 INFO L225 Difference]: With dead ends: 40
[2023-11-19 07:39:16,128 INFO L226 Difference]: Without dead ends: 32
[2023-11-19 07:39:16,129 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110
[2023-11-19 07:39:16,130 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 26 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2023-11-19 07:39:16,130 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 86 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2023-11-19 07:39:16,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states.
[2023-11-19 07:39:16,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 31.
[2023-11-19 07:39:16,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 24 states have (on average 1.125) internal successors, (27), 24 states have internal predecessors, (27), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5)
[2023-11-19 07:39:16,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 36 transitions.
[2023-11-19 07:39:16,145 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 36 transitions. Word has length 37
[2023-11-19 07:39:16,145 INFO L84 Accepts]: Finished accepts. word is rejected.
[2023-11-19 07:39:16,145 INFO L495 AbstractCegarLoop]: Abstraction has 31 states and 36 transitions.
[2023-11-19 07:39:16,146 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 6 states have internal predecessors, (22), 1 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4)
[2023-11-19 07:39:16,146 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 36 transitions.
[2023-11-19 07:39:16,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41
[2023-11-19 07:39:16,151 INFO L187 NwaCegarLoop]: Found error trace
[2023-11-19 07:39:16,151 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2023-11-19 07:39:16,151 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4
[2023-11-19 07:39:16,151 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-19 07:39:16,152 INFO L160 PredicateUnifier]: Initialized classic predicate unifier
[2023-11-19 07:39:16,152 INFO L85 PathProgramCache]: Analyzing trace with hash -1005030197, now seen corresponding path program 1 times
[2023-11-19 07:39:16,152 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-19 07:39:16,154 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [242589131]
[2023-11-19 07:39:16,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-19 07:39:16,155 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-19 07:39:16,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-19 07:39:17,398 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2
[2023-11-19 07:39:17,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-19 07:39:17,408 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9
[2023-11-19 07:39:17,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-19 07:39:17,419 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16
[2023-11-19 07:39:17,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-19 07:39:17,565 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23
[2023-11-19 07:39:17,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-19 07:39:17,849 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 16 proven. 7 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked.
[2023-11-19 07:39:17,850 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-19 07:39:17,850 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [242589131]
[2023-11-19 07:39:17,850 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [242589131] provided 0 perfect and 1 imperfect interpolant sequences
[2023-11-19 07:39:17,850 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [287453011]
[2023-11-19 07:39:17,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-19 07:39:17,851 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-19 07:39:17,851 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_179c64d9-2519-4036-a3c1-ef814ff5221f/bin/uautomizer-verify-uCwYo4JHxu/z3
[2023-11-19 07:39:17,856 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_179c64d9-2519-4036-a3c1-ef814ff5221f/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-19 07:39:17,879 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_179c64d9-2519-4036-a3c1-ef814ff5221f/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process
[2023-11-19 07:39:18,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-19 07:39:18,063 INFO L262 TraceCheckSpWp]: Trace formula consists of 396 conjuncts, 67 conjunts are in the unsatisfiable core
[2023-11-19 07:39:18,069 INFO L285 TraceCheckSpWp]: Computing forward predicates...
[2023-11-19 07:39:18,080 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5
[2023-11-19 07:39:18,096 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 7
[2023-11-19 07:39:18,223 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7
[2023-11-19 07:39:18,231 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7
[2023-11-19 07:39:18,345 INFO L349 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size
[2023-11-19 07:39:18,345 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 15 treesize of output 15
[2023-11-19 07:39:18,357 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 20 treesize of output 15
[2023-11-19 07:39:18,501 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 15
[2023-11-19 07:39:18,508 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 7 treesize of output 3
[2023-11-19 07:39:18,558 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3
[2023-11-19 07:39:18,584 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 19 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked.
[2023-11-19 07:39:18,584 INFO L327 TraceCheckSpWp]: Computing backward predicates...
[2023-11-19 07:39:18,959 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [287453011] provided 0 perfect and 1 imperfect interpolant sequences
[2023-11-19 07:39:18,959 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences.
[2023-11-19 07:39:18,959 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 21
[2023-11-19 07:39:18,960 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1784177273]
[2023-11-19 07:39:18,960 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton
[2023-11-19 07:39:18,960 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states
[2023-11-19 07:39:18,961 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-19 07:39:18,961 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants.
[2023-11-19 07:39:18,962 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=590, Unknown=0, NotChecked=0, Total=650
[2023-11-19 07:39:18,962 INFO L87 Difference]: Start difference. First operand 31 states and 36 transitions. Second operand has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 17 states have internal predecessors, (44), 2 states have call successors, (8), 3 states have call predecessors, (8), 4 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5)
[2023-11-19 07:39:19,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-19 07:39:19,850 INFO L93 Difference]: Finished difference Result 48 states and 54 transitions.
[2023-11-19 07:39:19,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states.
[2023-11-19 07:39:19,851 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 17 states have internal predecessors, (44), 2 states have call successors, (8), 3 states have call predecessors, (8), 4 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5) Word has length 40
[2023-11-19 07:39:19,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-19 07:39:19,852 INFO L225 Difference]: With dead ends: 48
[2023-11-19 07:39:19,852 INFO L226 Difference]: Without dead ends: 40
[2023-11-19 07:39:19,853 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=160, Invalid=1246, Unknown=0, NotChecked=0, Total=1406
[2023-11-19 07:39:19,854 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 57 mSDsluCounter, 170 mSDsCounter, 0 mSdLazyCounter, 335 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 185 SdHoareTripleChecker+Invalid, 343 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 335 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time
[2023-11-19 07:39:19,854 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [57 Valid, 185 Invalid, 343 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 335 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time]
[2023-11-19 07:39:19,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states.
[2023-11-19 07:39:19,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 39.
[2023-11-19 07:39:19,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 31 states have (on average 1.1290322580645162) internal successors, (35), 31 states have internal predecessors, (35), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5)
[2023-11-19 07:39:19,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 44 transitions.
[2023-11-19 07:39:19,868 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 44 transitions. Word has length 40
[2023-11-19 07:39:19,869 INFO L84 Accepts]: Finished accepts. word is rejected.
[2023-11-19 07:39:19,870 INFO L495 AbstractCegarLoop]: Abstraction has 39 states and 44 transitions.
[2023-11-19 07:39:19,873 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 17 states have internal predecessors, (44), 2 states have call successors, (8), 3 states have call predecessors, (8), 4 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5)
[2023-11-19 07:39:19,874 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 44 transitions.
[2023-11-19 07:39:19,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44
[2023-11-19 07:39:19,878 INFO L187 NwaCegarLoop]: Found error trace
[2023-11-19 07:39:19,878 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2023-11-19 07:39:19,903 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_179c64d9-2519-4036-a3c1-ef814ff5221f/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0
[2023-11-19 07:39:20,079 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_179c64d9-2519-4036-a3c1-ef814ff5221f/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-19 07:39:20,079 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-19 07:39:20,079 INFO L160 PredicateUnifier]: Initialized classic predicate unifier
[2023-11-19 07:39:20,080 INFO L85 PathProgramCache]: Analyzing trace with hash 2009254361, now seen corresponding path program 2 times
[2023-11-19 07:39:20,080 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-19 07:39:20,080 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [293408096]
[2023-11-19 07:39:20,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-19 07:39:20,080 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-19 07:39:20,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-19 07:39:21,987 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2
[2023-11-19 07:39:21,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-19 07:39:21,994 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9
[2023-11-19 07:39:22,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-19 07:39:22,130 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16
[2023-11-19 07:39:22,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-19 07:39:22,407 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23
[2023-11-19 07:39:22,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-19 07:39:22,783 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 12 proven. 21 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked.
[2023-11-19 07:39:22,784 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-19 07:39:22,784 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [293408096]
[2023-11-19 07:39:22,784 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [293408096] provided 0 perfect and 1 imperfect interpolant sequences
[2023-11-19 07:39:22,784 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1886475162]
[2023-11-19 07:39:22,784 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1
[2023-11-19 07:39:22,784 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-19 07:39:22,785 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_179c64d9-2519-4036-a3c1-ef814ff5221f/bin/uautomizer-verify-uCwYo4JHxu/z3
[2023-11-19 07:39:22,786 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_179c64d9-2519-4036-a3c1-ef814ff5221f/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-19 07:39:22,803 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_179c64d9-2519-4036-a3c1-ef814ff5221f/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process
[2023-11-19 07:39:23,007 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s)
[2023-11-19 07:39:23,008 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat
[2023-11-19 07:39:23,012 INFO L262 TraceCheckSpWp]: Trace formula consists of 406 conjuncts, 105 conjunts are in the unsatisfiable core
[2023-11-19 07:39:23,023 INFO L285 TraceCheckSpWp]: Computing forward predicates...
[2023-11-19 07:39:23,034 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5
[2023-11-19 07:39:23,081 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 1
[2023-11-19 07:39:23,359 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7
[2023-11-19 07:39:23,366 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7
[2023-11-19 07:39:23,386 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 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 20 treesize of output 25
[2023-11-19 07:39:23,582 INFO L349 Elim1Store]: treesize reduction 21, result has 44.7 percent of original size
[2023-11-19 07:39:23,583 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 20 treesize of output 23
[2023-11-19 07:39:23,611 INFO L349 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size
[2023-11-19 07:39:23,611 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18
[2023-11-19 07:39:23,821 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 12
[2023-11-19 07:39:23,845 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 12
[2023-11-19 07:39:24,022 INFO L349 Elim1Store]: treesize reduction 21, result has 44.7 percent of original size
[2023-11-19 07:39:24,023 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 20 treesize of output 23
[2023-11-19 07:39:24,037 INFO L190 IndexEqualityManager]: detected not equals via solver
[2023-11-19 07:39:24,039 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 53 treesize of output 36
[2023-11-19 07:39:24,055 INFO L349 Elim1Store]: treesize reduction 37, result has 24.5 percent of original size
[2023-11-19 07:39:24,056 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 28 treesize of output 22
[2023-11-19 07:39:24,064 INFO L190 IndexEqualityManager]: detected not equals via solver
[2023-11-19 07:39:24,068 INFO L349 Elim1Store]: treesize reduction 19, result has 5.0 percent of original size
[2023-11-19 07:39:24,069 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 51 treesize of output 49
[2023-11-19 07:39:24,734 INFO L349 Elim1Store]: treesize reduction 24, result has 70.4 percent of original size
[2023-11-19 07:39:24,735 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 7 new quantified variables, introduced 10 case distinctions, treesize of input 137 treesize of output 135
[2023-11-19 07:39:24,826 INFO L349 Elim1Store]: treesize reduction 24, result has 70.4 percent of original size
[2023-11-19 07:39:24,826 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 77 treesize of output 113
[2023-11-19 07:39:25,569 INFO L349 Elim1Store]: treesize reduction 17, result has 41.4 percent of original size
[2023-11-19 07:39:25,570 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 52 treesize of output 43
[2023-11-19 07:39:25,592 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 17 proven. 21 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked.
[2023-11-19 07:39:25,592 INFO L327 TraceCheckSpWp]: Computing backward predicates...
[2023-11-19 07:39:26,024 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size
[2023-11-19 07:39:26,024 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 39
[2023-11-19 07:39:26,032 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size
[2023-11-19 07:39:26,032 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 36
[2023-11-19 07:39:26,170 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1886475162] provided 0 perfect and 1 imperfect interpolant sequences
[2023-11-19 07:39:26,171 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences.
[2023-11-19 07:39:26,171 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 35
[2023-11-19 07:39:26,171 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [425401928]
[2023-11-19 07:39:26,172 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton
[2023-11-19 07:39:26,172 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states
[2023-11-19 07:39:26,172 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-19 07:39:26,174 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants.
[2023-11-19 07:39:26,175 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=1383, Unknown=0, NotChecked=0, Total=1482
[2023-11-19 07:39:26,175 INFO L87 Difference]: Start difference. First operand 39 states and 44 transitions. Second operand has 35 states, 35 states have (on average 1.6571428571428573) internal successors, (58), 30 states have internal predecessors, (58), 5 states have call successors, (8), 4 states have call predecessors, (8), 7 states have return successors, (7), 7 states have call predecessors, (7), 5 states have call successors, (7)
[2023-11-19 07:39:29,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-19 07:39:29,297 INFO L93 Difference]: Finished difference Result 68 states and 80 transitions.
[2023-11-19 07:39:29,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states.
[2023-11-19 07:39:29,298 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.6571428571428573) internal successors, (58), 30 states have internal predecessors, (58), 5 states have call successors, (8), 4 states have call predecessors, (8), 7 states have return successors, (7), 7 states have call predecessors, (7), 5 states have call successors, (7) Word has length 43
[2023-11-19 07:39:29,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-19 07:39:29,300 INFO L225 Difference]: With dead ends: 68
[2023-11-19 07:39:29,300 INFO L226 Difference]: Without dead ends: 63
[2023-11-19 07:39:29,303 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 492 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=427, Invalid=3355, Unknown=0, NotChecked=0, Total=3782
[2023-11-19 07:39:29,303 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 136 mSDsluCounter, 271 mSDsCounter, 0 mSdLazyCounter, 633 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 136 SdHoareTripleChecker+Valid, 288 SdHoareTripleChecker+Invalid, 666 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 633 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time
[2023-11-19 07:39:29,304 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [136 Valid, 288 Invalid, 666 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 633 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time]
[2023-11-19 07:39:29,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states.
[2023-11-19 07:39:29,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 51.
[2023-11-19 07:39:29,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 42 states have (on average 1.1666666666666667) internal successors, (49), 42 states have internal predecessors, (49), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5)
[2023-11-19 07:39:29,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 58 transitions.
[2023-11-19 07:39:29,319 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 58 transitions. Word has length 43
[2023-11-19 07:39:29,319 INFO L84 Accepts]: Finished accepts. word is rejected.
[2023-11-19 07:39:29,320 INFO L495 AbstractCegarLoop]: Abstraction has 51 states and 58 transitions.
[2023-11-19 07:39:29,320 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 1.6571428571428573) internal successors, (58), 30 states have internal predecessors, (58), 5 states have call successors, (8), 4 states have call predecessors, (8), 7 states have return successors, (7), 7 states have call predecessors, (7), 5 states have call successors, (7)
[2023-11-19 07:39:29,320 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 58 transitions.
[2023-11-19 07:39:29,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44
[2023-11-19 07:39:29,321 INFO L187 NwaCegarLoop]: Found error trace
[2023-11-19 07:39:29,321 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2023-11-19 07:39:29,342 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_179c64d9-2519-4036-a3c1-ef814ff5221f/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0
[2023-11-19 07:39:29,542 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_179c64d9-2519-4036-a3c1-ef814ff5221f/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6
[2023-11-19 07:39:29,542 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-19 07:39:29,542 INFO L160 PredicateUnifier]: Initialized classic predicate unifier
[2023-11-19 07:39:29,543 INFO L85 PathProgramCache]: Analyzing trace with hash 2066512663, now seen corresponding path program 1 times
[2023-11-19 07:39:29,543 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-19 07:39:29,543 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [207539255]
[2023-11-19 07:39:29,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-19 07:39:29,543 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-19 07:39:29,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-19 07:39:30,456 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2
[2023-11-19 07:39:30,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-19 07:39:30,463 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9
[2023-11-19 07:39:30,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-19 07:39:30,509 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16
[2023-11-19 07:39:30,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-19 07:39:30,640 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23
[2023-11-19 07:39:30,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-19 07:39:30,826 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 22 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked.
[2023-11-19 07:39:30,827 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-19 07:39:30,827 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [207539255]
[2023-11-19 07:39:30,827 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [207539255] provided 0 perfect and 1 imperfect interpolant sequences
[2023-11-19 07:39:30,827 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [808497577]
[2023-11-19 07:39:30,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-19 07:39:30,828 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-19 07:39:30,828 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_179c64d9-2519-4036-a3c1-ef814ff5221f/bin/uautomizer-verify-uCwYo4JHxu/z3
[2023-11-19 07:39:30,829 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_179c64d9-2519-4036-a3c1-ef814ff5221f/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-19 07:39:30,851 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_179c64d9-2519-4036-a3c1-ef814ff5221f/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process
[2023-11-19 07:39:31,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-19 07:39:31,047 INFO L262 TraceCheckSpWp]: Trace formula consists of 403 conjuncts, 56 conjunts are in the unsatisfiable core
[2023-11-19 07:39:31,054 INFO L285 TraceCheckSpWp]: Computing forward predicates...
[2023-11-19 07:39:31,108 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1
[2023-11-19 07:39:31,267 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 12
[2023-11-19 07:39:31,280 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7
[2023-11-19 07:39:31,424 INFO L349 Elim1Store]: treesize reduction 21, result has 44.7 percent of original size
[2023-11-19 07:39:31,425 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 24
[2023-11-19 07:39:31,530 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3
[2023-11-19 07:39:31,601 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size
[2023-11-19 07:39:31,601 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 23
[2023-11-19 07:39:31,607 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 31 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked.
[2023-11-19 07:39:31,608 INFO L327 TraceCheckSpWp]: Computing backward predicates...
[2023-11-19 07:39:31,822 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size
[2023-11-19 07:39:31,822 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 20
[2023-11-19 07:39:31,872 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [808497577] provided 0 perfect and 1 imperfect interpolant sequences
[2023-11-19 07:39:31,872 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences.
[2023-11-19 07:39:31,872 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18] total 29
[2023-11-19 07:39:31,872 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [258747696]
[2023-11-19 07:39:31,872 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton
[2023-11-19 07:39:31,873 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states
[2023-11-19 07:39:31,873 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-19 07:39:31,874 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants.
[2023-11-19 07:39:31,874 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=940, Unknown=0, NotChecked=0, Total=1056
[2023-11-19 07:39:31,875 INFO L87 Difference]: Start difference. First operand 51 states and 58 transitions. Second operand has 29 states, 29 states have (on average 1.8275862068965518) internal successors, (53), 24 states have internal predecessors, (53), 4 states have call successors, (8), 4 states have call predecessors, (8), 6 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6)
[2023-11-19 07:39:33,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-19 07:39:33,027 INFO L93 Difference]: Finished difference Result 75 states and 85 transitions.
[2023-11-19 07:39:33,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states.
[2023-11-19 07:39:33,028 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.8275862068965518) internal successors, (53), 24 states have internal predecessors, (53), 4 states have call successors, (8), 4 states have call predecessors, (8), 6 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) Word has length 43
[2023-11-19 07:39:33,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-19 07:39:33,030 INFO L225 Difference]: With dead ends: 75
[2023-11-19 07:39:33,030 INFO L226 Difference]: Without dead ends: 59
[2023-11-19 07:39:33,032 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 595 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=416, Invalid=2236, Unknown=0, NotChecked=0, Total=2652
[2023-11-19 07:39:33,032 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 85 mSDsluCounter, 190 mSDsCounter, 0 mSdLazyCounter, 339 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 210 SdHoareTripleChecker+Invalid, 366 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 339 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time
[2023-11-19 07:39:33,033 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [85 Valid, 210 Invalid, 366 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 339 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time]
[2023-11-19 07:39:33,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states.
[2023-11-19 07:39:33,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 54.
[2023-11-19 07:39:33,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 43 states have (on average 1.069767441860465) internal successors, (46), 43 states have internal predecessors, (46), 5 states have call successors, (5), 5 states have call predecessors, (5), 5 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6)
[2023-11-19 07:39:33,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 57 transitions.
[2023-11-19 07:39:33,069 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 57 transitions. Word has length 43
[2023-11-19 07:39:33,069 INFO L84 Accepts]: Finished accepts. word is rejected.
[2023-11-19 07:39:33,069 INFO L495 AbstractCegarLoop]: Abstraction has 54 states and 57 transitions.
[2023-11-19 07:39:33,069 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.8275862068965518) internal successors, (53), 24 states have internal predecessors, (53), 4 states have call successors, (8), 4 states have call predecessors, (8), 6 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6)
[2023-11-19 07:39:33,070 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 57 transitions.
[2023-11-19 07:39:33,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47
[2023-11-19 07:39:33,070 INFO L187 NwaCegarLoop]: Found error trace
[2023-11-19 07:39:33,071 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2023-11-19 07:39:33,111 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_179c64d9-2519-4036-a3c1-ef814ff5221f/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0
[2023-11-19 07:39:33,283 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_179c64d9-2519-4036-a3c1-ef814ff5221f/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-19 07:39:33,284 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-19 07:39:33,284 INFO L160 PredicateUnifier]: Initialized classic predicate unifier
[2023-11-19 07:39:33,284 INFO L85 PathProgramCache]: Analyzing trace with hash 1384296971, now seen corresponding path program 3 times
[2023-11-19 07:39:33,284 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-19 07:39:33,284 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1123258016]
[2023-11-19 07:39:33,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-19 07:39:33,285 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-19 07:39:33,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat
[2023-11-19 07:39:33,352 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders.
[2023-11-19 07:39:33,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat
[2023-11-19 07:39:33,441 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace
[2023-11-19 07:39:33,441 INFO L360 BasicCegarLoop]: Counterexample is feasible
[2023-11-19 07:39:33,442 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining)
[2023-11-19 07:39:33,444 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8
[2023-11-19 07:39:33,448 INFO L445 BasicCegarLoop]: Path program histogram: [3, 1, 1, 1, 1, 1, 1]
[2023-11-19 07:39:33,452 INFO L178 ceAbstractionStarter]: Computing trace abstraction results
[2023-11-19 07:39:33,501 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~ret7 could not be translated
[2023-11-19 07:39:33,504 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~ret8 could not be translated
[2023-11-19 07:39:33,512 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~ret9 could not be translated
[2023-11-19 07:39:33,515 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~ret10 could not be translated
[2023-11-19 07:39:33,516 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~short4 could not be translated
[2023-11-19 07:39:33,516 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~mem3 could not be translated
[2023-11-19 07:39:33,517 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~mem3 could not be translated
[2023-11-19 07:39:33,517 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~short4 could not be translated
[2023-11-19 07:39:33,518 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~short4 could not be translated
[2023-11-19 07:39:33,518 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~mem3 could not be translated
[2023-11-19 07:39:33,519 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~short4 could not be translated
[2023-11-19 07:39:33,519 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~mem3 could not be translated
[2023-11-19 07:39:33,535 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 19.11 07:39:33 BoogieIcfgContainer
[2023-11-19 07:39:33,535 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction----------------------------
[2023-11-19 07:39:33,536 INFO L112 PluginConnector]: ------------------------Witness Printer----------------------------
[2023-11-19 07:39:33,536 INFO L270 PluginConnector]: Initializing Witness Printer...
[2023-11-19 07:39:33,536 INFO L274 PluginConnector]: Witness Printer initialized
[2023-11-19 07:39:33,537 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:39:10" (3/4) ...
[2023-11-19 07:39:33,538 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample
[2023-11-19 07:39:33,560 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~ret7 could not be translated
[2023-11-19 07:39:33,562 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~ret8 could not be translated
[2023-11-19 07:39:33,563 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~ret9 could not be translated
[2023-11-19 07:39:33,565 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~ret10 could not be translated
[2023-11-19 07:39:33,566 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~mem3 could not be translated
[2023-11-19 07:39:33,566 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~short4 could not be translated
[2023-11-19 07:39:33,570 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~mem3 could not be translated
[2023-11-19 07:39:33,571 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~short4 could not be translated
[2023-11-19 07:39:33,571 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~mem3 could not be translated
[2023-11-19 07:39:33,572 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~short4 could not be translated
[2023-11-19 07:39:33,572 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~mem3 could not be translated
[2023-11-19 07:39:33,573 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~short4 could not be translated
[2023-11-19 07:39:33,612 INFO L149 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_179c64d9-2519-4036-a3c1-ef814ff5221f/bin/uautomizer-verify-uCwYo4JHxu/witness.graphml
[2023-11-19 07:39:33,612 INFO L131 PluginConnector]: ------------------------ END Witness Printer----------------------------
[2023-11-19 07:39:33,613 INFO L158 Benchmark]: Toolchain (without parser) took 23794.47ms. Allocated memory was 127.9MB in the beginning and 343.9MB in the end (delta: 216.0MB). Free memory was 83.5MB in the beginning and 167.0MB in the end (delta: -83.5MB). Peak memory consumption was 133.2MB. Max. memory is 16.1GB.
[2023-11-19 07:39:33,613 INFO L158 Benchmark]: CDTParser took 0.32ms. Allocated memory is still 96.5MB. Free memory is still 46.6MB. There was no memory consumed. Max. memory is 16.1GB.
[2023-11-19 07:39:33,613 INFO L158 Benchmark]: CACSL2BoogieTranslator took 540.64ms. Allocated memory is still 127.9MB. Free memory was 83.2MB in the beginning and 66.0MB in the end (delta: 17.1MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB.
[2023-11-19 07:39:33,614 INFO L158 Benchmark]: Boogie Procedure Inliner took 68.64ms. Allocated memory is still 127.9MB. Free memory was 66.0MB in the beginning and 64.0MB in the end (delta: 2.0MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB.
[2023-11-19 07:39:33,614 INFO L158 Benchmark]: Boogie Preprocessor took 29.55ms. Allocated memory is still 127.9MB. Free memory was 64.0MB in the beginning and 62.6MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB.
[2023-11-19 07:39:33,615 INFO L158 Benchmark]: RCFGBuilder took 419.28ms. Allocated memory is still 127.9MB. Free memory was 62.6MB in the beginning and 93.1MB in the end (delta: -30.6MB). Peak memory consumption was 12.1MB. Max. memory is 16.1GB.
[2023-11-19 07:39:33,615 INFO L158 Benchmark]: TraceAbstraction took 22653.09ms. Allocated memory was 127.9MB in the beginning and 343.9MB in the end (delta: 216.0MB). Free memory was 92.4MB in the beginning and 171.1MB in the end (delta: -78.8MB). Peak memory consumption was 135.8MB. Max. memory is 16.1GB.
[2023-11-19 07:39:33,616 INFO L158 Benchmark]: Witness Printer took 76.35ms. Allocated memory is still 343.9MB. Free memory was 171.1MB in the beginning and 167.0MB in the end (delta: 4.2MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB.
[2023-11-19 07:39:33,617 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] #######################
--- Results ---
* Results from de.uni_freiburg.informatik.ultimate.core:
- StatisticsResult: Toolchain Benchmarks
Benchmark results are:
* CDTParser took 0.32ms. Allocated memory is still 96.5MB. Free memory is still 46.6MB. There was no memory consumed. Max. memory is 16.1GB.
* CACSL2BoogieTranslator took 540.64ms. Allocated memory is still 127.9MB. Free memory was 83.2MB in the beginning and 66.0MB in the end (delta: 17.1MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB.
* Boogie Procedure Inliner took 68.64ms. Allocated memory is still 127.9MB. Free memory was 66.0MB in the beginning and 64.0MB in the end (delta: 2.0MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB.
* Boogie Preprocessor took 29.55ms. Allocated memory is still 127.9MB. Free memory was 64.0MB in the beginning and 62.6MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB.
* RCFGBuilder took 419.28ms. Allocated memory is still 127.9MB. Free memory was 62.6MB in the beginning and 93.1MB in the end (delta: -30.6MB). Peak memory consumption was 12.1MB. Max. memory is 16.1GB.
* TraceAbstraction took 22653.09ms. Allocated memory was 127.9MB in the beginning and 343.9MB in the end (delta: 216.0MB). Free memory was 92.4MB in the beginning and 171.1MB in the end (delta: -78.8MB). Peak memory consumption was 135.8MB. Max. memory is 16.1GB.
* Witness Printer took 76.35ms. Allocated memory is still 343.9MB. Free memory was 171.1MB in the beginning and 167.0MB in the end (delta: 4.2MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB.
* Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator:
- GenericResult: Unfinished Backtranslation
Unfinished Backtranslation: IdentifierExpression #t~ret7 could not be translated
- GenericResult: Unfinished Backtranslation
Unfinished Backtranslation: IdentifierExpression #t~ret8 could not be translated
- GenericResult: Unfinished Backtranslation
Unfinished Backtranslation: IdentifierExpression #t~ret9 could not be translated
- GenericResult: Unfinished Backtranslation
Unfinished Backtranslation: IdentifierExpression #t~ret10 could not be translated
- GenericResult: Unfinished Backtranslation
Unfinished Backtranslation: IdentifierExpression #t~short4 could not be translated
- GenericResult: Unfinished Backtranslation
Unfinished Backtranslation: IdentifierExpression #t~mem3 could not be translated
- GenericResult: Unfinished Backtranslation
Unfinished Backtranslation: IdentifierExpression #t~mem3 could not be translated
- GenericResult: Unfinished Backtranslation
Unfinished Backtranslation: IdentifierExpression #t~short4 could not be translated
- GenericResult: Unfinished Backtranslation
Unfinished Backtranslation: IdentifierExpression #t~short4 could not be translated
- GenericResult: Unfinished Backtranslation
Unfinished Backtranslation: IdentifierExpression #t~mem3 could not be translated
- GenericResult: Unfinished Backtranslation
Unfinished Backtranslation: IdentifierExpression #t~short4 could not be translated
- GenericResult: Unfinished Backtranslation
Unfinished Backtranslation: IdentifierExpression #t~mem3 could not be translated
- GenericResult: Unfinished Backtranslation
The program execution was not completely translated back.
- GenericResult: Unfinished Backtranslation
Unfinished Backtranslation: IdentifierExpression #t~ret7 could not be translated
- GenericResult: Unfinished Backtranslation
Unfinished Backtranslation: IdentifierExpression #t~ret8 could not be translated
- GenericResult: Unfinished Backtranslation
Unfinished Backtranslation: IdentifierExpression #t~ret9 could not be translated
- GenericResult: Unfinished Backtranslation
Unfinished Backtranslation: IdentifierExpression #t~ret10 could not be translated
- GenericResult: Unfinished Backtranslation
Unfinished Backtranslation: IdentifierExpression #t~mem3 could not be translated
- GenericResult: Unfinished Backtranslation
Unfinished Backtranslation: IdentifierExpression #t~short4 could not be translated
- GenericResult: Unfinished Backtranslation
Unfinished Backtranslation: IdentifierExpression #t~mem3 could not be translated
- GenericResult: Unfinished Backtranslation
Unfinished Backtranslation: IdentifierExpression #t~short4 could not be translated
- GenericResult: Unfinished Backtranslation
Unfinished Backtranslation: IdentifierExpression #t~mem3 could not be translated
- GenericResult: Unfinished Backtranslation
Unfinished Backtranslation: IdentifierExpression #t~short4 could not be translated
- GenericResult: Unfinished Backtranslation
Unfinished Backtranslation: IdentifierExpression #t~mem3 could not be translated
- GenericResult: Unfinished Backtranslation
Unfinished Backtranslation: IdentifierExpression #t~short4 could not be translated
- GenericResult: Unfinished Backtranslation
The program execution was not completely translated back.
* Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction:
- StatisticsResult: ErrorAutomatonStatistics
NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0
- CounterExampleResult [Line: 15]: a call to reach_error is reachable
a call to reach_error is reachable
We found a FailurePath:
[L533] mlist *head;
VAL [head={0:0}]
[L554] int i;
[L555] mlist *mylist, *temp;
VAL [head={0:0}]
[L556] CALL insert_list(mylist,2)
VAL [\old(head)={0:0}, \old(k)=2, head={0:0}, l={55:64}]
[L542] l = (mlist*)malloc(sizeof(mlist))
[L543] l->key = k
VAL [\old(head)={0:0}, \old(k)=2, head={0:0}, k=2, l={-1:0}, l={55:64}]
[L544] COND TRUE head==((void *)0)
[L545] l->next = ((void *)0)
VAL [\old(head)={0:0}, \old(k)=2, head={0:0}, k=2, l={-1:0}, l={55:64}]
[L550] head = l
[L551] return 0;
VAL [\old(head)={0:0}, \old(k)=2, \result=0, head={-1:0}, k=2, l={-1:0}, l={55:64}]
[L556] RET insert_list(mylist,2)
VAL [head={-1:0}, mylist={55:64}]
[L557] CALL insert_list(mylist,5)
VAL [\old(head)={-1:0}, \old(k)=5, head={-1:0}, l={55:64}]
[L542] l = (mlist*)malloc(sizeof(mlist))
[L543] l->key = k
VAL [\old(head)={-1:0}, \old(k)=5, head={-1:0}, k=5, l={-5:0}, l={55:64}]
[L544] COND FALSE !(head==((void *)0))
[L547] l->key = k
[L548] l->next = head
VAL [\old(head)={-1:0}, \old(k)=5, head={-1:0}, k=5, l={-5:0}, l={55:64}]
[L550] head = l
[L551] return 0;
VAL [\old(head)={-1:0}, \old(k)=5, \result=0, head={-5:0}, k=5, l={-5:0}, l={55:64}]
[L557] RET insert_list(mylist,5)
VAL [head={-5:0}, mylist={55:64}]
[L558] CALL insert_list(mylist,1)
VAL [\old(head)={-5:0}, \old(k)=1, head={-5:0}, l={55:64}]
[L542] l = (mlist*)malloc(sizeof(mlist))
[L543] l->key = k
VAL [\old(head)={-5:0}, \old(k)=1, head={-5:0}, k=1, l={-3:0}, l={55:64}]
[L544] COND FALSE !(head==((void *)0))
[L547] l->key = k
[L548] l->next = head
VAL [\old(head)={-5:0}, \old(k)=1, head={-5:0}, k=1, l={-3:0}, l={55:64}]
[L550] head = l
[L551] return 0;
VAL [\old(head)={-5:0}, \old(k)=1, \result=0, head={-3:0}, k=1, l={-3:0}, l={55:64}]
[L558] RET insert_list(mylist,1)
VAL [head={-3:0}, mylist={55:64}]
[L559] CALL insert_list(mylist,3)
VAL [\old(head)={-3:0}, \old(k)=3, head={-3:0}, l={55:64}]
[L542] l = (mlist*)malloc(sizeof(mlist))
[L543] l->key = k
VAL [\old(head)={-3:0}, \old(k)=3, head={-3:0}, k=3, l={-4:0}, l={55:64}]
[L544] COND FALSE !(head==((void *)0))
[L547] l->key = k
[L548] l->next = head
VAL [\old(head)={-3:0}, \old(k)=3, head={-3:0}, k=3, l={-4:0}, l={55:64}]
[L550] head = l
[L551] return 0;
VAL [\old(head)={-3:0}, \old(k)=3, \result=0, head={-4:0}, k=3, l={-4:0}, l={55:64}]
[L559] RET insert_list(mylist,3)
VAL [head={-4:0}, mylist={55:64}]
[L560] CALL, EXPR search_list(head,2)
[L535] l = head
VAL [\old(k)=2, head={-4:0}, k=2, l={-4:0}, l={-4:0}]
[L536] l!=((void *)0) && l->key!=k
[L536] EXPR l->key
[L536] l!=((void *)0) && l->key!=k
VAL [\old(k)=2, head={-4:0}, k=2, l={-4:0}, l={-4:0}]
[L536] COND TRUE l!=((void *)0) && l->key!=k
[L537] EXPR l->next
[L537] l = l->next
[L536] l!=((void *)0) && l->key!=k
[L536] EXPR l->key
[L536] l!=((void *)0) && l->key!=k
VAL [\old(k)=2, head={-4:0}, k=2, l={-3:0}, l={-4:0}]
[L536] COND TRUE l!=((void *)0) && l->key!=k
[L537] EXPR l->next
[L537] l = l->next
[L536] l!=((void *)0) && l->key!=k
[L536] EXPR l->key
[L536] l!=((void *)0) && l->key!=k
VAL [\old(k)=2, head={-4:0}, k=2, l={-4:0}, l={-5:0}]
[L536] COND TRUE l!=((void *)0) && l->key!=k
[L537] EXPR l->next
[L537] l = l->next
[L536] l!=((void *)0) && l->key!=k
[L536] EXPR l->key
[L536] l!=((void *)0) && l->key!=k
VAL [\old(k)=2, head={-4:0}, k=2, l={-1:0}, l={-4:0}]
[L536] COND FALSE !(l!=((void *)0) && l->key!=k)
[L539] return l;
VAL [\old(k)=2, \result={-1:0}, head={-4:0}, k=2, l={-1:0}, l={-4:0}]
[L560] RET, EXPR search_list(head,2)
[L560] temp = search_list(head,2)
[L561] EXPR temp->key
[L561] CALL __VERIFIER_assert(temp->key==1)
[L14] COND TRUE !(cond)
VAL [\old(cond)=0, cond=0, head={-4:0}]
[L15] reach_error()
VAL [\old(cond)=0, cond=0, head={-4:0}]
- StatisticsResult: Ultimate Automizer benchmark data
CFG has 2 procedures, 28 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 22.5s, OverallIterations: 9, TraceHistogramMax: 4, PathProgramHistogramMax: 3, EmptinessCheckTime: 0.0s, AutomataDifference: 6.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 385 SdHoareTripleChecker+Valid, 1.8s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 385 mSDsluCounter, 1047 SdHoareTripleChecker+Invalid, 1.6s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 889 mSDsCounter, 84 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 1646 IncrementalHoareTripleChecker+Invalid, 1730 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 84 mSolverCounterUnsat, 158 mSDtfsCounter, 1646 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 526 GetRequests, 328 SyntacticMatches, 0 SemanticMatches, 198 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1271 ImplicationChecksByTransitivity, 7.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=54occurred in iteration=8, InterpolantAutomatonStates: 106, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 8 MinimizatonAttempts, 40 StatesRemovedByMinimization, 7 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.2s SsaConstructionTime, 0.6s SatisfiabilityAnalysisTime, 12.9s InterpolantComputationTime, 590 NumberOfCodeBlocks, 590 NumberOfCodeBlocksAsserted, 16 NumberOfCheckSat, 566 ConstructedInterpolants, 8 QuantifiedInterpolants, 5240 SizeOfPredicates, 62 NumberOfNonLiveVariables, 2292 ConjunctsInSsa, 264 ConjunctsInUnsatCore, 15 InterpolantComputations, 4 PerfectInterpolantSequences, 350/492 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available
RESULT: Ultimate proved your program to be incorrect!
[2023-11-19 07:39:33,659 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_179c64d9-2519-4036-a3c1-ef814ff5221f/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0
Received shutdown request...
--- End real Ultimate output ---
Execution finished normally
Writing output log to file Ultimate.log
Writing human readable error path to file UltimateCounterExample.errorpath
Result:
FALSE