./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/goblint-regression/28-race_reach_06-cond_racing1.i --full-output --architecture 32bit
--------------------------------------------------------------------------------
Checking for memory safety (deref-memtrack)
Using default analysis
Version 9bd2c7ff
Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28544478-e6cd-4c5b-a6a5-e0a85228da18/bin/uautomizer-verify-uCwYo4JHxu/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28544478-e6cd-4c5b-a6a5-e0a85228da18/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_28544478-e6cd-4c5b-a6a5-e0a85228da18/bin/uautomizer-verify-uCwYo4JHxu/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28544478-e6cd-4c5b-a6a5-e0a85228da18/bin/uautomizer-verify-uCwYo4JHxu/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/goblint-regression/28-race_reach_06-cond_racing1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28544478-e6cd-4c5b-a6a5-e0a85228da18/bin/uautomizer-verify-uCwYo4JHxu/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28544478-e6cd-4c5b-a6a5-e0a85228da18/bin/uautomizer-verify-uCwYo4JHxu --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) )
CHECK( init(main()), LTL(G valid-deref) )
CHECK( init(main()), LTL(G valid-memtrack) )
--witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 830cb16a3cbc120e059f0ed7638e33ed20360a11f425952cf536aa3d659b86fc
--- Real Ultimate output ---
This is Ultimate 0.2.3-dev-9bd2c7f
[2023-11-19 07:32:52,837 INFO L188 SettingsManager]: Resetting all preferences to default values...
[2023-11-19 07:32:52,963 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28544478-e6cd-4c5b-a6a5-e0a85228da18/bin/uautomizer-verify-uCwYo4JHxu/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf
[2023-11-19 07:32:52,970 WARN L101 SettingsManager]: Preference file contains the following unknown settings:
[2023-11-19 07:32:52,971 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class
[2023-11-19 07:32:53,011 INFO L130 SettingsManager]: Preferences different from defaults after loading the file:
[2023-11-19 07:32:53,012 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults:
[2023-11-19 07:32:53,013 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR;
[2023-11-19 07:32:53,014 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults:
[2023-11-19 07:32:53,019 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS
[2023-11-19 07:32:53,021 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults:
[2023-11-19 07:32:53,021 INFO L153 SettingsManager]: * Create parallel compositions if possible=false
[2023-11-19 07:32:53,022 INFO L153 SettingsManager]: * Use SBE=true
[2023-11-19 07:32:53,024 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults:
[2023-11-19 07:32:53,024 INFO L153 SettingsManager]: * sizeof long=4
[2023-11-19 07:32:53,025 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true
[2023-11-19 07:32:53,025 INFO L153 SettingsManager]: * sizeof POINTER=4
[2023-11-19 07:32:53,026 INFO L153 SettingsManager]: * Check division by zero=IGNORE
[2023-11-19 07:32:53,026 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true
[2023-11-19 07:32:53,027 INFO L153 SettingsManager]: * Bitprecise bitfields=true
[2023-11-19 07:32:53,028 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true
[2023-11-19 07:32:53,028 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE
[2023-11-19 07:32:53,029 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true
[2023-11-19 07:32:53,029 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false
[2023-11-19 07:32:53,030 INFO L153 SettingsManager]: * sizeof long double=12
[2023-11-19 07:32:53,030 INFO L153 SettingsManager]: * Use constant arrays=true
[2023-11-19 07:32:53,031 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults:
[2023-11-19 07:32:53,032 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements
[2023-11-19 07:32:53,032 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode
[2023-11-19 07:32:53,032 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2023-11-19 07:32:53,034 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults:
[2023-11-19 07:32:53,034 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP
[2023-11-19 07:32:53,035 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL
[2023-11-19 07:32:53,035 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2023-11-19 07:32:53,035 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET
[2023-11-19 07:32:53,035 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO
[2023-11-19 07:32:53,036 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode
[2023-11-19 07:32:53,036 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC
[2023-11-19 07:32:53,036 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_28544478-e6cd-4c5b-a6a5-e0a85228da18/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$1
WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations
WARNING: All illegal access operations will be denied in a future release
Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main
Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28544478-e6cd-4c5b-a6a5-e0a85228da18/bin/uautomizer-verify-uCwYo4JHxu
Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness
Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false
Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) )
CHECK( init(main()), LTL(G valid-deref) )
CHECK( init(main()), LTL(G valid-memtrack) )
Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer
Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit
Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 830cb16a3cbc120e059f0ed7638e33ed20360a11f425952cf536aa3d659b86fc
[2023-11-19 07:32:53,289 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp
[2023-11-19 07:32:53,312 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized
[2023-11-19 07:32:53,315 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected.
[2023-11-19 07:32:53,316 INFO L270 PluginConnector]: Initializing CDTParser...
[2023-11-19 07:32:53,317 INFO L274 PluginConnector]: CDTParser initialized
[2023-11-19 07:32:53,318 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28544478-e6cd-4c5b-a6a5-e0a85228da18/bin/uautomizer-verify-uCwYo4JHxu/../../sv-benchmarks/c/goblint-regression/28-race_reach_06-cond_racing1.i
[2023-11-19 07:32:56,450 INFO L533 CDTParser]: Created temporary CDT project at NULL
[2023-11-19 07:32:56,843 INFO L384 CDTParser]: Found 1 translation units.
[2023-11-19 07:32:56,844 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28544478-e6cd-4c5b-a6a5-e0a85228da18/sv-benchmarks/c/goblint-regression/28-race_reach_06-cond_racing1.i
[2023-11-19 07:32:56,864 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28544478-e6cd-4c5b-a6a5-e0a85228da18/bin/uautomizer-verify-uCwYo4JHxu/data/efbda1ec6/3124511dbb7641ed87a0036bcf8bd3a9/FLAG61e3a6cc4
[2023-11-19 07:32:56,881 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28544478-e6cd-4c5b-a6a5-e0a85228da18/bin/uautomizer-verify-uCwYo4JHxu/data/efbda1ec6/3124511dbb7641ed87a0036bcf8bd3a9
[2023-11-19 07:32:56,884 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] #######################
[2023-11-19 07:32:56,886 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements.
[2023-11-19 07:32:56,887 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator----------------------------
[2023-11-19 07:32:56,887 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator...
[2023-11-19 07:32:56,893 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized
[2023-11-19 07:32:56,894 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:32:56" (1/1) ...
[2023-11-19 07:32:56,895 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@166c71ed and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:32:56, skipping insertion in model container
[2023-11-19 07:32:56,895 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:32:56" (1/1) ...
[2023-11-19 07:32:56,959 INFO L177 MainTranslator]: Built tables and reachable declarations
[2023-11-19 07:32:57,439 INFO L209 PostProcessor]: Analyzing one entry point: main
[2023-11-19 07:32:57,455 INFO L202 MainTranslator]: Completed pre-run
[2023-11-19 07:32:57,509 INFO L209 PostProcessor]: Analyzing one entry point: main
[2023-11-19 07:32:57,589 INFO L206 MainTranslator]: Completed translation
[2023-11-19 07:32:57,589 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:32:57 WrapperNode
[2023-11-19 07:32:57,590 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator----------------------------
[2023-11-19 07:32:57,616 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner----------------------------
[2023-11-19 07:32:57,616 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner...
[2023-11-19 07:32:57,616 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized
[2023-11-19 07:32:57,625 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:32:57" (1/1) ...
[2023-11-19 07:32:57,672 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:32:57" (1/1) ...
[2023-11-19 07:32:57,727 INFO L138 Inliner]: procedures = 270, calls = 37, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 93
[2023-11-19 07:32:57,728 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner----------------------------
[2023-11-19 07:32:57,729 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor----------------------------
[2023-11-19 07:32:57,729 INFO L270 PluginConnector]: Initializing Boogie Preprocessor...
[2023-11-19 07:32:57,730 INFO L274 PluginConnector]: Boogie Preprocessor initialized
[2023-11-19 07:32:57,739 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:32:57" (1/1) ...
[2023-11-19 07:32:57,740 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:32:57" (1/1) ...
[2023-11-19 07:32:57,744 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:32:57" (1/1) ...
[2023-11-19 07:32:57,744 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:32:57" (1/1) ...
[2023-11-19 07:32:57,751 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:32:57" (1/1) ...
[2023-11-19 07:32:57,755 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:32:57" (1/1) ...
[2023-11-19 07:32:57,765 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:32:57" (1/1) ...
[2023-11-19 07:32:57,773 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:32:57" (1/1) ...
[2023-11-19 07:32:57,776 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor----------------------------
[2023-11-19 07:32:57,785 INFO L112 PluginConnector]: ------------------------RCFGBuilder----------------------------
[2023-11-19 07:32:57,785 INFO L270 PluginConnector]: Initializing RCFGBuilder...
[2023-11-19 07:32:57,785 INFO L274 PluginConnector]: RCFGBuilder initialized
[2023-11-19 07:32:57,786 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:32:57" (1/1) ...
[2023-11-19 07:32:57,793 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2023-11-19 07:32:57,806 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28544478-e6cd-4c5b-a6a5-e0a85228da18/bin/uautomizer-verify-uCwYo4JHxu/z3
[2023-11-19 07:32:57,822 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28544478-e6cd-4c5b-a6a5-e0a85228da18/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null)
[2023-11-19 07:32:57,852 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28544478-e6cd-4c5b-a6a5-e0a85228da18/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process
[2023-11-19 07:32:57,870 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack
[2023-11-19 07:32:57,870 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc
[2023-11-19 07:32:57,871 INFO L130 BoogieDeclarations]: Found specification of procedure read~int
[2023-11-19 07:32:57,872 INFO L130 BoogieDeclarations]: Found specification of procedure write~int
[2023-11-19 07:32:57,872 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock
[2023-11-19 07:32:57,872 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit
[2023-11-19 07:32:57,873 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun
[2023-11-19 07:32:57,873 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun
[2023-11-19 07:32:57,873 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int
[2023-11-19 07:32:57,873 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start
[2023-11-19 07:32:57,874 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start
[2023-11-19 07:32:57,875 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement
[2023-11-19 07:32:58,067 INFO L236 CfgBuilder]: Building ICFG
[2023-11-19 07:32:58,070 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation
[2023-11-19 07:32:58,331 INFO L277 CfgBuilder]: Performing block encoding
[2023-11-19 07:32:58,341 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start)
[2023-11-19 07:32:58,342 INFO L302 CfgBuilder]: Removed 10 assume(true) statements.
[2023-11-19 07:32:58,346 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:32:58 BoogieIcfgContainer
[2023-11-19 07:32:58,346 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder----------------------------
[2023-11-19 07:32:58,349 INFO L112 PluginConnector]: ------------------------TraceAbstraction----------------------------
[2023-11-19 07:32:58,350 INFO L270 PluginConnector]: Initializing TraceAbstraction...
[2023-11-19 07:32:58,353 INFO L274 PluginConnector]: TraceAbstraction initialized
[2023-11-19 07:32:58,354 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 07:32:56" (1/3) ...
[2023-11-19 07:32:58,354 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@8153da7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 07:32:58, skipping insertion in model container
[2023-11-19 07:32:58,355 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:32:57" (2/3) ...
[2023-11-19 07:32:58,355 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@8153da7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 07:32:58, skipping insertion in model container
[2023-11-19 07:32:58,355 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:32:58" (3/3) ...
[2023-11-19 07:32:58,357 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_06-cond_racing1.i
[2023-11-19 07:32:58,375 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION
[2023-11-19 07:32:58,376 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 6 error locations.
[2023-11-19 07:32:58,376 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances.
[2023-11-19 07:32:58,475 INFO L144 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions.
[2023-11-19 07:32:58,536 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 123 places, 136 transitions, 279 flow
[2023-11-19 07:32:58,642 INFO L124 PetriNetUnfolderBase]: 25/195 cut-off events.
[2023-11-19 07:32:58,642 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES.
[2023-11-19 07:32:58,651 INFO L83 FinitePrefix]: Finished finitePrefix Result has 200 conditions, 195 events. 25/195 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 532 event pairs, 0 based on Foata normal form. 0/155 useless extension candidates. Maximal degree in co-relation 96. Up to 6 conditions per place.
[2023-11-19 07:32:58,651 INFO L82 GeneralOperation]: Start removeDead. Operand has 123 places, 136 transitions, 279 flow
[2023-11-19 07:32:58,658 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 123 places, 136 transitions, 279 flow
[2023-11-19 07:32:58,662 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation.
[2023-11-19 07:32:58,677 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 123 places, 136 transitions, 279 flow
[2023-11-19 07:32:58,683 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 123 places, 136 transitions, 279 flow
[2023-11-19 07:32:58,684 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 123 places, 136 transitions, 279 flow
[2023-11-19 07:32:58,782 INFO L124 PetriNetUnfolderBase]: 25/195 cut-off events.
[2023-11-19 07:32:58,782 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES.
[2023-11-19 07:32:58,785 INFO L83 FinitePrefix]: Finished finitePrefix Result has 200 conditions, 195 events. 25/195 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 532 event pairs, 0 based on Foata normal form. 0/155 useless extension candidates. Maximal degree in co-relation 96. Up to 6 conditions per place.
[2023-11-19 07:32:58,790 INFO L119 LiptonReduction]: Number of co-enabled transitions 3640
[2023-11-19 07:33:03,707 INFO L134 LiptonReduction]: Checked pairs total: 6020
[2023-11-19 07:33:03,707 INFO L136 LiptonReduction]: Total number of compositions: 132
[2023-11-19 07:33:03,723 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ========
[2023-11-19 07:33:03,730 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@36e5e7b0, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=<UNSUPPORTED>, UseSemiCommutativity=<UNSUPPORTED>, Solver=<NOT_USED>, SolverTimeout=<NOT_USED>]
[2023-11-19 07:33:03,731 INFO L358 AbstractCegarLoop]: Starting to check reachability of 7 error locations.
[2023-11-19 07:33:03,734 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder.
[2023-11-19 07:33:03,734 INFO L124 PetriNetUnfolderBase]: 0/2 cut-off events.
[2023-11-19 07:33:03,734 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES.
[2023-11-19 07:33:03,734 INFO L200 CegarLoopForPetriNet]: Found error trace
[2023-11-19 07:33:03,735 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1]
[2023-11-19 07:33:03,735 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] ===
[2023-11-19 07:33:03,741 INFO L160 PredicateUnifier]: Initialized classic predicate unifier
[2023-11-19 07:33:03,741 INFO L85 PathProgramCache]: Analyzing trace with hash 16913, now seen corresponding path program 1 times
[2023-11-19 07:33:03,750 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-19 07:33:03,751 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1283337602]
[2023-11-19 07:33:03,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-19 07:33:03,752 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-19 07:33:03,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-19 07:33:04,204 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-11-19 07:33:04,205 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-19 07:33:04,205 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1283337602]
[2023-11-19 07:33:04,206 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1283337602] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-19 07:33:04,206 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-19 07:33:04,206 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1
[2023-11-19 07:33:04,208 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [966387605]
[2023-11-19 07:33:04,209 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-19 07:33:04,218 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states
[2023-11-19 07:33:04,224 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-19 07:33:04,245 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2023-11-19 07:33:04,246 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2023-11-19 07:33:04,317 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 114 out of 268
[2023-11-19 07:33:04,320 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 40 transitions, 87 flow. Second operand has 3 states, 3 states have (on average 114.66666666666667) internal successors, (344), 3 states have internal predecessors, (344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-19 07:33:04,320 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user.
[2023-11-19 07:33:04,320 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 114 of 268
[2023-11-19 07:33:04,321 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand
[2023-11-19 07:33:04,481 INFO L124 PetriNetUnfolderBase]: 137/310 cut-off events.
[2023-11-19 07:33:04,481 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES.
[2023-11-19 07:33:04,486 INFO L83 FinitePrefix]: Finished finitePrefix Result has 616 conditions, 310 events. 137/310 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 1498 event pairs, 0 based on Foata normal form. 17/241 useless extension candidates. Maximal degree in co-relation 579. Up to 289 conditions per place.
[2023-11-19 07:33:04,492 INFO L140 encePairwiseOnDemand]: 254/268 looper letters, 36 selfloop transitions, 2 changer transitions 1/41 dead transitions.
[2023-11-19 07:33:04,492 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 34 places, 41 transitions, 167 flow
[2023-11-19 07:33:04,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states.
[2023-11-19 07:33:04,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states.
[2023-11-19 07:33:04,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 399 transitions.
[2023-11-19 07:33:04,521 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4962686567164179
[2023-11-19 07:33:04,522 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 399 transitions.
[2023-11-19 07:33:04,523 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 399 transitions.
[2023-11-19 07:33:04,525 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic.
[2023-11-19 07:33:04,528 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 399 transitions.
[2023-11-19 07:33:04,532 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 133.0) internal successors, (399), 3 states have internal predecessors, (399), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-19 07:33:04,538 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 268.0) internal successors, (1072), 4 states have internal predecessors, (1072), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-19 07:33:04,539 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 268.0) internal successors, (1072), 4 states have internal predecessors, (1072), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-19 07:33:04,541 INFO L175 Difference]: Start difference. First operand has 32 places, 40 transitions, 87 flow. Second operand 3 states and 399 transitions.
[2023-11-19 07:33:04,542 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 34 places, 41 transitions, 167 flow
[2023-11-19 07:33:04,546 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 41 transitions, 167 flow, removed 0 selfloop flow, removed 0 redundant places.
[2023-11-19 07:33:04,548 INFO L231 Difference]: Finished difference. Result has 35 places, 30 transitions, 79 flow
[2023-11-19 07:33:04,550 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=268, PETRI_DIFFERENCE_MINUEND_FLOW=69, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=79, PETRI_PLACES=35, PETRI_TRANSITIONS=30}
[2023-11-19 07:33:04,555 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 3 predicate places.
[2023-11-19 07:33:04,555 INFO L495 AbstractCegarLoop]: Abstraction has has 35 places, 30 transitions, 79 flow
[2023-11-19 07:33:04,556 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 114.66666666666667) internal successors, (344), 3 states have internal predecessors, (344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-19 07:33:04,556 INFO L200 CegarLoopForPetriNet]: Found error trace
[2023-11-19 07:33:04,556 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1]
[2023-11-19 07:33:04,556 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0
[2023-11-19 07:33:04,557 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] ===
[2023-11-19 07:33:04,557 INFO L160 PredicateUnifier]: Initialized classic predicate unifier
[2023-11-19 07:33:04,558 INFO L85 PathProgramCache]: Analyzing trace with hash 16914, now seen corresponding path program 1 times
[2023-11-19 07:33:04,558 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-19 07:33:04,558 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1544186924]
[2023-11-19 07:33:04,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-19 07:33:04,559 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-19 07:33:04,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-19 07:33:04,645 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-11-19 07:33:04,645 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-19 07:33:04,646 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1544186924]
[2023-11-19 07:33:04,646 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1544186924] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-19 07:33:04,646 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-19 07:33:04,646 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1
[2023-11-19 07:33:04,647 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1408214779]
[2023-11-19 07:33:04,647 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-19 07:33:04,648 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states
[2023-11-19 07:33:04,648 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-19 07:33:04,649 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2023-11-19 07:33:04,649 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2023-11-19 07:33:04,702 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 112 out of 268
[2023-11-19 07:33:04,703 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 30 transitions, 79 flow. Second operand has 3 states, 3 states have (on average 112.66666666666667) internal successors, (338), 3 states have internal predecessors, (338), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-19 07:33:04,703 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user.
[2023-11-19 07:33:04,704 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 112 of 268
[2023-11-19 07:33:04,704 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand
[2023-11-19 07:33:04,803 INFO L124 PetriNetUnfolderBase]: 113/250 cut-off events.
[2023-11-19 07:33:04,803 INFO L125 PetriNetUnfolderBase]: For 15/15 co-relation queries the response was YES.
[2023-11-19 07:33:04,804 INFO L83 FinitePrefix]: Finished finitePrefix Result has 550 conditions, 250 events. 113/250 cut-off events. For 15/15 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 959 event pairs, 96 based on Foata normal form. 0/202 useless extension candidates. Maximal degree in co-relation 522. Up to 228 conditions per place.
[2023-11-19 07:33:04,806 INFO L140 encePairwiseOnDemand]: 264/268 looper letters, 32 selfloop transitions, 2 changer transitions 0/36 dead transitions.
[2023-11-19 07:33:04,806 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 34 places, 36 transitions, 159 flow
[2023-11-19 07:33:04,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states.
[2023-11-19 07:33:04,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states.
[2023-11-19 07:33:04,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 372 transitions.
[2023-11-19 07:33:04,809 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4626865671641791
[2023-11-19 07:33:04,809 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 372 transitions.
[2023-11-19 07:33:04,810 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 372 transitions.
[2023-11-19 07:33:04,810 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic.
[2023-11-19 07:33:04,810 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 372 transitions.
[2023-11-19 07:33:04,826 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 124.0) internal successors, (372), 3 states have internal predecessors, (372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-19 07:33:04,830 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 268.0) internal successors, (1072), 4 states have internal predecessors, (1072), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-19 07:33:04,831 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 268.0) internal successors, (1072), 4 states have internal predecessors, (1072), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-19 07:33:04,831 INFO L175 Difference]: Start difference. First operand has 35 places, 30 transitions, 79 flow. Second operand 3 states and 372 transitions.
[2023-11-19 07:33:04,831 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 34 places, 36 transitions, 159 flow
[2023-11-19 07:33:04,832 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 36 transitions, 155 flow, removed 0 selfloop flow, removed 2 redundant places.
[2023-11-19 07:33:04,833 INFO L231 Difference]: Finished difference. Result has 32 places, 28 transitions, 75 flow
[2023-11-19 07:33:04,833 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=268, PETRI_DIFFERENCE_MINUEND_FLOW=71, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=75, PETRI_PLACES=32, PETRI_TRANSITIONS=28}
[2023-11-19 07:33:04,834 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 0 predicate places.
[2023-11-19 07:33:04,835 INFO L495 AbstractCegarLoop]: Abstraction has has 32 places, 28 transitions, 75 flow
[2023-11-19 07:33:04,835 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 112.66666666666667) internal successors, (338), 3 states have internal predecessors, (338), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-19 07:33:04,835 INFO L200 CegarLoopForPetriNet]: Found error trace
[2023-11-19 07:33:04,836 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1]
[2023-11-19 07:33:04,836 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1
[2023-11-19 07:33:04,836 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] ===
[2023-11-19 07:33:04,837 INFO L160 PredicateUnifier]: Initialized classic predicate unifier
[2023-11-19 07:33:04,837 INFO L85 PathProgramCache]: Analyzing trace with hash 504195116, now seen corresponding path program 1 times
[2023-11-19 07:33:04,837 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-19 07:33:04,837 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [27298591]
[2023-11-19 07:33:04,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-19 07:33:04,838 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-19 07:33:04,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-19 07:33:05,001 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-11-19 07:33:05,002 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-19 07:33:05,002 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [27298591]
[2023-11-19 07:33:05,002 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [27298591] provided 0 perfect and 1 imperfect interpolant sequences
[2023-11-19 07:33:05,003 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [939810029]
[2023-11-19 07:33:05,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-19 07:33:05,003 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-19 07:33:05,004 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28544478-e6cd-4c5b-a6a5-e0a85228da18/bin/uautomizer-verify-uCwYo4JHxu/z3
[2023-11-19 07:33:05,008 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28544478-e6cd-4c5b-a6a5-e0a85228da18/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-19 07:33:05,016 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28544478-e6cd-4c5b-a6a5-e0a85228da18/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process
[2023-11-19 07:33:05,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-19 07:33:05,144 INFO L262 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 9 conjunts are in the unsatisfiable core
[2023-11-19 07:33:05,150 INFO L285 TraceCheckSpWp]: Computing forward predicates...
[2023-11-19 07:33:05,245 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1
[2023-11-19 07:33:05,342 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-11-19 07:33:05,342 INFO L327 TraceCheckSpWp]: Computing backward predicates...
[2023-11-19 07:33:05,420 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-11-19 07:33:05,421 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [939810029] provided 0 perfect and 2 imperfect interpolant sequences
[2023-11-19 07:33:05,421 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences.
[2023-11-19 07:33:05,421 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 6
[2023-11-19 07:33:05,422 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [592055523]
[2023-11-19 07:33:05,422 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton
[2023-11-19 07:33:05,422 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states
[2023-11-19 07:33:05,423 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-19 07:33:05,423 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants.
[2023-11-19 07:33:05,423 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56
[2023-11-19 07:33:05,593 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 110 out of 268
[2023-11-19 07:33:05,595 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 28 transitions, 75 flow. Second operand has 8 states, 8 states have (on average 111.875) internal successors, (895), 8 states have internal predecessors, (895), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-19 07:33:05,595 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user.
[2023-11-19 07:33:05,596 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 110 of 268
[2023-11-19 07:33:05,596 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand
[2023-11-19 07:33:05,686 INFO L124 PetriNetUnfolderBase]: 16/55 cut-off events.
[2023-11-19 07:33:05,687 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES.
[2023-11-19 07:33:05,687 INFO L83 FinitePrefix]: Finished finitePrefix Result has 117 conditions, 55 events. 16/55 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 127 event pairs, 0 based on Foata normal form. 9/64 useless extension candidates. Maximal degree in co-relation 109. Up to 34 conditions per place.
[2023-11-19 07:33:05,687 INFO L140 encePairwiseOnDemand]: 263/268 looper letters, 19 selfloop transitions, 2 changer transitions 0/23 dead transitions.
[2023-11-19 07:33:05,688 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 23 places, 23 transitions, 96 flow
[2023-11-19 07:33:05,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states.
[2023-11-19 07:33:05,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states.
[2023-11-19 07:33:05,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 464 transitions.
[2023-11-19 07:33:05,691 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43283582089552236
[2023-11-19 07:33:05,691 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 464 transitions.
[2023-11-19 07:33:05,692 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 464 transitions.
[2023-11-19 07:33:05,692 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic.
[2023-11-19 07:33:05,693 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 464 transitions.
[2023-11-19 07:33:05,694 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 116.0) internal successors, (464), 4 states have internal predecessors, (464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-19 07:33:05,698 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 268.0) internal successors, (1340), 5 states have internal predecessors, (1340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-19 07:33:05,699 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 268.0) internal successors, (1340), 5 states have internal predecessors, (1340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-19 07:33:05,699 INFO L175 Difference]: Start difference. First operand has 32 places, 28 transitions, 75 flow. Second operand 4 states and 464 transitions.
[2023-11-19 07:33:05,700 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 23 places, 23 transitions, 96 flow
[2023-11-19 07:33:05,700 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 21 places, 23 transitions, 93 flow, removed 0 selfloop flow, removed 2 redundant places.
[2023-11-19 07:33:05,701 INFO L231 Difference]: Finished difference. Result has 21 places, 14 transitions, 37 flow
[2023-11-19 07:33:05,702 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=268, PETRI_DIFFERENCE_MINUEND_FLOW=33, PETRI_DIFFERENCE_MINUEND_PLACES=18, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=14, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=12, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=37, PETRI_PLACES=21, PETRI_TRANSITIONS=14}
[2023-11-19 07:33:05,703 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, -11 predicate places.
[2023-11-19 07:33:05,704 INFO L495 AbstractCegarLoop]: Abstraction has has 21 places, 14 transitions, 37 flow
[2023-11-19 07:33:05,705 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 111.875) internal successors, (895), 8 states have internal predecessors, (895), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-19 07:33:05,705 INFO L200 CegarLoopForPetriNet]: Found error trace
[2023-11-19 07:33:05,705 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1]
[2023-11-19 07:33:05,732 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28544478-e6cd-4c5b-a6a5-e0a85228da18/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0
[2023-11-19 07:33:05,920 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28544478-e6cd-4c5b-a6a5-e0a85228da18/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-19 07:33:05,920 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] ===
[2023-11-19 07:33:05,921 INFO L160 PredicateUnifier]: Initialized classic predicate unifier
[2023-11-19 07:33:05,921 INFO L85 PathProgramCache]: Analyzing trace with hash -1549820251, now seen corresponding path program 1 times
[2023-11-19 07:33:05,921 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-19 07:33:05,921 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2085660317]
[2023-11-19 07:33:05,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-19 07:33:05,921 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-19 07:33:05,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat
[2023-11-19 07:33:05,953 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders.
[2023-11-19 07:33:05,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat
[2023-11-19 07:33:05,982 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace
[2023-11-19 07:33:05,982 INFO L360 BasicCegarLoop]: Counterexample is feasible
[2023-11-19 07:33:05,983 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (6 of 7 remaining)
[2023-11-19 07:33:05,986 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 7 remaining)
[2023-11-19 07:33:05,986 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 7 remaining)
[2023-11-19 07:33:05,986 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 7 remaining)
[2023-11-19 07:33:05,987 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 7 remaining)
[2023-11-19 07:33:05,987 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (1 of 7 remaining)
[2023-11-19 07:33:05,987 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_LEAK (0 of 7 remaining)
[2023-11-19 07:33:05,987 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3
[2023-11-19 07:33:05,988 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1]
[2023-11-19 07:33:05,990 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis
[2023-11-19 07:33:05,991 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances.
[2023-11-19 07:33:06,020 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions.
[2023-11-19 07:33:06,025 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 148 places, 166 transitions, 348 flow
[2023-11-19 07:33:06,072 INFO L124 PetriNetUnfolderBase]: 43/315 cut-off events.
[2023-11-19 07:33:06,073 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES.
[2023-11-19 07:33:06,075 INFO L83 FinitePrefix]: Finished finitePrefix Result has 327 conditions, 315 events. 43/315 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 1025 event pairs, 0 based on Foata normal form. 0/247 useless extension candidates. Maximal degree in co-relation 197. Up to 9 conditions per place.
[2023-11-19 07:33:06,076 INFO L82 GeneralOperation]: Start removeDead. Operand has 148 places, 166 transitions, 348 flow
[2023-11-19 07:33:06,079 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 148 places, 166 transitions, 348 flow
[2023-11-19 07:33:06,079 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation.
[2023-11-19 07:33:06,080 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 148 places, 166 transitions, 348 flow
[2023-11-19 07:33:06,080 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 148 places, 166 transitions, 348 flow
[2023-11-19 07:33:06,080 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 148 places, 166 transitions, 348 flow
[2023-11-19 07:33:06,123 INFO L124 PetriNetUnfolderBase]: 43/315 cut-off events.
[2023-11-19 07:33:06,123 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES.
[2023-11-19 07:33:06,125 INFO L83 FinitePrefix]: Finished finitePrefix Result has 327 conditions, 315 events. 43/315 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 1025 event pairs, 0 based on Foata normal form. 0/247 useless extension candidates. Maximal degree in co-relation 197. Up to 9 conditions per place.
[2023-11-19 07:33:06,135 INFO L119 LiptonReduction]: Number of co-enabled transitions 9464
[2023-11-19 07:33:10,765 INFO L134 LiptonReduction]: Checked pairs total: 22974
[2023-11-19 07:33:10,769 INFO L136 LiptonReduction]: Total number of compositions: 143
[2023-11-19 07:33:10,772 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ========
[2023-11-19 07:33:10,775 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@36e5e7b0, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=<UNSUPPORTED>, UseSemiCommutativity=<UNSUPPORTED>, Solver=<NOT_USED>, SolverTimeout=<NOT_USED>]
[2023-11-19 07:33:10,777 INFO L358 AbstractCegarLoop]: Starting to check reachability of 7 error locations.
[2023-11-19 07:33:10,779 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder.
[2023-11-19 07:33:10,779 INFO L124 PetriNetUnfolderBase]: 0/2 cut-off events.
[2023-11-19 07:33:10,780 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES.
[2023-11-19 07:33:10,780 INFO L200 CegarLoopForPetriNet]: Found error trace
[2023-11-19 07:33:10,780 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1]
[2023-11-19 07:33:10,780 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] ===
[2023-11-19 07:33:10,781 INFO L160 PredicateUnifier]: Initialized classic predicate unifier
[2023-11-19 07:33:10,781 INFO L85 PathProgramCache]: Analyzing trace with hash 27839, now seen corresponding path program 1 times
[2023-11-19 07:33:10,781 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-19 07:33:10,781 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1282983404]
[2023-11-19 07:33:10,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-19 07:33:10,782 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-19 07:33:10,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-19 07:33:10,894 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-11-19 07:33:10,897 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-19 07:33:10,897 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1282983404]
[2023-11-19 07:33:10,898 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1282983404] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-19 07:33:10,899 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-19 07:33:10,899 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1
[2023-11-19 07:33:10,899 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1729609435]
[2023-11-19 07:33:10,900 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-19 07:33:10,901 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states
[2023-11-19 07:33:10,901 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-19 07:33:10,906 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2023-11-19 07:33:10,907 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2023-11-19 07:33:10,959 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 136 out of 309
[2023-11-19 07:33:10,960 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 63 transitions, 142 flow. Second operand has 3 states, 3 states have (on average 136.66666666666666) internal successors, (410), 3 states have internal predecessors, (410), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-19 07:33:10,960 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user.
[2023-11-19 07:33:10,961 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 136 of 309
[2023-11-19 07:33:10,961 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand
[2023-11-19 07:33:11,518 INFO L124 PetriNetUnfolderBase]: 2050/3659 cut-off events.
[2023-11-19 07:33:11,518 INFO L125 PetriNetUnfolderBase]: For 39/39 co-relation queries the response was YES.
[2023-11-19 07:33:11,524 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7024 conditions, 3659 events. 2050/3659 cut-off events. For 39/39 co-relation queries the response was YES. Maximal size of possible extension queue 163. Compared 23306 event pairs, 1628 based on Foata normal form. 395/3317 useless extension candidates. Maximal degree in co-relation 3658. Up to 3311 conditions per place.
[2023-11-19 07:33:11,549 INFO L140 encePairwiseOnDemand]: 289/309 looper letters, 43 selfloop transitions, 2 changer transitions 1/57 dead transitions.
[2023-11-19 07:33:11,549 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 57 transitions, 222 flow
[2023-11-19 07:33:11,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states.
[2023-11-19 07:33:11,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states.
[2023-11-19 07:33:11,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 478 transitions.
[2023-11-19 07:33:11,552 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5156418554476807
[2023-11-19 07:33:11,552 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 478 transitions.
[2023-11-19 07:33:11,553 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 478 transitions.
[2023-11-19 07:33:11,553 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic.
[2023-11-19 07:33:11,553 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 478 transitions.
[2023-11-19 07:33:11,555 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 159.33333333333334) internal successors, (478), 3 states have internal predecessors, (478), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-19 07:33:11,558 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 309.0) internal successors, (1236), 4 states have internal predecessors, (1236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-19 07:33:11,560 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 309.0) internal successors, (1236), 4 states have internal predecessors, (1236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-19 07:33:11,560 INFO L175 Difference]: Start difference. First operand has 50 places, 63 transitions, 142 flow. Second operand 3 states and 478 transitions.
[2023-11-19 07:33:11,560 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 57 transitions, 222 flow
[2023-11-19 07:33:11,564 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 57 transitions, 222 flow, removed 0 selfloop flow, removed 0 redundant places.
[2023-11-19 07:33:11,566 INFO L231 Difference]: Finished difference. Result has 53 places, 48 transitions, 126 flow
[2023-11-19 07:33:11,566 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=309, PETRI_DIFFERENCE_MINUEND_FLOW=112, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=126, PETRI_PLACES=53, PETRI_TRANSITIONS=48}
[2023-11-19 07:33:11,568 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 3 predicate places.
[2023-11-19 07:33:11,569 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 48 transitions, 126 flow
[2023-11-19 07:33:11,569 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 136.66666666666666) internal successors, (410), 3 states have internal predecessors, (410), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-19 07:33:11,569 INFO L200 CegarLoopForPetriNet]: Found error trace
[2023-11-19 07:33:11,570 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1]
[2023-11-19 07:33:11,570 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4
[2023-11-19 07:33:11,570 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] ===
[2023-11-19 07:33:11,571 INFO L160 PredicateUnifier]: Initialized classic predicate unifier
[2023-11-19 07:33:11,571 INFO L85 PathProgramCache]: Analyzing trace with hash 27838, now seen corresponding path program 1 times
[2023-11-19 07:33:11,571 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-19 07:33:11,571 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [663941732]
[2023-11-19 07:33:11,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-19 07:33:11,572 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-19 07:33:11,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-19 07:33:11,640 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-11-19 07:33:11,640 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-19 07:33:11,640 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [663941732]
[2023-11-19 07:33:11,641 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [663941732] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-19 07:33:11,641 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-19 07:33:11,641 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1
[2023-11-19 07:33:11,641 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1094815720]
[2023-11-19 07:33:11,641 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-19 07:33:11,642 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states
[2023-11-19 07:33:11,642 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-19 07:33:11,643 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2023-11-19 07:33:11,643 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2023-11-19 07:33:11,683 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 134 out of 309
[2023-11-19 07:33:11,685 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 48 transitions, 126 flow. Second operand has 3 states, 3 states have (on average 134.66666666666666) internal successors, (404), 3 states have internal predecessors, (404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-19 07:33:11,685 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user.
[2023-11-19 07:33:11,685 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 134 of 309
[2023-11-19 07:33:11,685 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand
[2023-11-19 07:33:12,147 INFO L124 PetriNetUnfolderBase]: 1686/3006 cut-off events.
[2023-11-19 07:33:12,148 INFO L125 PetriNetUnfolderBase]: For 180/180 co-relation queries the response was YES.
[2023-11-19 07:33:12,154 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6066 conditions, 3006 events. 1686/3006 cut-off events. For 180/180 co-relation queries the response was YES. Maximal size of possible extension queue 132. Compared 18446 event pairs, 1484 based on Foata normal form. 0/2568 useless extension candidates. Maximal degree in co-relation 6005. Up to 2521 conditions per place.
[2023-11-19 07:33:12,178 INFO L140 encePairwiseOnDemand]: 305/309 looper letters, 47 selfloop transitions, 2 changer transitions 0/60 dead transitions.
[2023-11-19 07:33:12,178 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 60 transitions, 248 flow
[2023-11-19 07:33:12,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states.
[2023-11-19 07:33:12,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states.
[2023-11-19 07:33:12,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 452 transitions.
[2023-11-19 07:33:12,183 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48759439050701187
[2023-11-19 07:33:12,183 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 452 transitions.
[2023-11-19 07:33:12,183 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 452 transitions.
[2023-11-19 07:33:12,184 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic.
[2023-11-19 07:33:12,184 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 452 transitions.
[2023-11-19 07:33:12,186 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 150.66666666666666) internal successors, (452), 3 states have internal predecessors, (452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-19 07:33:12,189 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 309.0) internal successors, (1236), 4 states have internal predecessors, (1236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-19 07:33:12,191 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 309.0) internal successors, (1236), 4 states have internal predecessors, (1236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-19 07:33:12,191 INFO L175 Difference]: Start difference. First operand has 53 places, 48 transitions, 126 flow. Second operand 3 states and 452 transitions.
[2023-11-19 07:33:12,191 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 60 transitions, 248 flow
[2023-11-19 07:33:12,196 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 60 transitions, 246 flow, removed 0 selfloop flow, removed 1 redundant places.
[2023-11-19 07:33:12,198 INFO L231 Difference]: Finished difference. Result has 51 places, 46 transitions, 124 flow
[2023-11-19 07:33:12,198 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=309, PETRI_DIFFERENCE_MINUEND_FLOW=120, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=124, PETRI_PLACES=51, PETRI_TRANSITIONS=46}
[2023-11-19 07:33:12,202 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 1 predicate places.
[2023-11-19 07:33:12,202 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 46 transitions, 124 flow
[2023-11-19 07:33:12,206 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 134.66666666666666) internal successors, (404), 3 states have internal predecessors, (404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-19 07:33:12,206 INFO L200 CegarLoopForPetriNet]: Found error trace
[2023-11-19 07:33:12,206 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1]
[2023-11-19 07:33:12,206 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5
[2023-11-19 07:33:12,207 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] ===
[2023-11-19 07:33:12,207 INFO L160 PredicateUnifier]: Initialized classic predicate unifier
[2023-11-19 07:33:12,208 INFO L85 PathProgramCache]: Analyzing trace with hash -37695527, now seen corresponding path program 1 times
[2023-11-19 07:33:12,208 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-19 07:33:12,210 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1826626492]
[2023-11-19 07:33:12,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-19 07:33:12,211 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-19 07:33:12,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-19 07:33:12,366 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-11-19 07:33:12,367 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-19 07:33:12,371 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1826626492]
[2023-11-19 07:33:12,372 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1826626492] provided 0 perfect and 1 imperfect interpolant sequences
[2023-11-19 07:33:12,372 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1114082795]
[2023-11-19 07:33:12,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-19 07:33:12,372 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-19 07:33:12,373 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28544478-e6cd-4c5b-a6a5-e0a85228da18/bin/uautomizer-verify-uCwYo4JHxu/z3
[2023-11-19 07:33:12,376 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28544478-e6cd-4c5b-a6a5-e0a85228da18/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-19 07:33:12,400 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28544478-e6cd-4c5b-a6a5-e0a85228da18/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process
[2023-11-19 07:33:12,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-19 07:33:12,467 INFO L262 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 9 conjunts are in the unsatisfiable core
[2023-11-19 07:33:12,469 INFO L285 TraceCheckSpWp]: Computing forward predicates...
[2023-11-19 07:33:12,480 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1
[2023-11-19 07:33:12,527 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-11-19 07:33:12,527 INFO L327 TraceCheckSpWp]: Computing backward predicates...
[2023-11-19 07:33:12,572 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-11-19 07:33:12,573 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1114082795] provided 0 perfect and 2 imperfect interpolant sequences
[2023-11-19 07:33:12,573 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences.
[2023-11-19 07:33:12,573 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 6
[2023-11-19 07:33:12,573 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1056198996]
[2023-11-19 07:33:12,573 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton
[2023-11-19 07:33:12,574 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states
[2023-11-19 07:33:12,574 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-19 07:33:12,575 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants.
[2023-11-19 07:33:12,575 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56
[2023-11-19 07:33:12,731 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 133 out of 309
[2023-11-19 07:33:12,733 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 46 transitions, 124 flow. Second operand has 8 states, 8 states have (on average 134.875) internal successors, (1079), 8 states have internal predecessors, (1079), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-19 07:33:12,733 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user.
[2023-11-19 07:33:12,733 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 133 of 309
[2023-11-19 07:33:12,733 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand
[2023-11-19 07:33:13,218 INFO L124 PetriNetUnfolderBase]: 1520/2530 cut-off events.
[2023-11-19 07:33:13,218 INFO L125 PetriNetUnfolderBase]: For 172/172 co-relation queries the response was YES.
[2023-11-19 07:33:13,224 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5302 conditions, 2530 events. 1520/2530 cut-off events. For 172/172 co-relation queries the response was YES. Maximal size of possible extension queue 119. Compared 15390 event pairs, 90 based on Foata normal form. 7/2321 useless extension candidates. Maximal degree in co-relation 4804. Up to 1950 conditions per place.
[2023-11-19 07:33:13,246 INFO L140 encePairwiseOnDemand]: 304/309 looper letters, 65 selfloop transitions, 5 changer transitions 0/81 dead transitions.
[2023-11-19 07:33:13,247 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 81 transitions, 332 flow
[2023-11-19 07:33:13,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states.
[2023-11-19 07:33:13,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states.
[2023-11-19 07:33:13,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 739 transitions.
[2023-11-19 07:33:13,252 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47831715210355985
[2023-11-19 07:33:13,252 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 739 transitions.
[2023-11-19 07:33:13,252 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 739 transitions.
[2023-11-19 07:33:13,253 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic.
[2023-11-19 07:33:13,253 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 739 transitions.
[2023-11-19 07:33:13,257 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 147.8) internal successors, (739), 5 states have internal predecessors, (739), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-19 07:33:13,262 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 309.0) internal successors, (1854), 6 states have internal predecessors, (1854), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-19 07:33:13,264 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 309.0) internal successors, (1854), 6 states have internal predecessors, (1854), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-19 07:33:13,264 INFO L175 Difference]: Start difference. First operand has 51 places, 46 transitions, 124 flow. Second operand 5 states and 739 transitions.
[2023-11-19 07:33:13,264 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 81 transitions, 332 flow
[2023-11-19 07:33:13,272 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 81 transitions, 328 flow, removed 0 selfloop flow, removed 2 redundant places.
[2023-11-19 07:33:13,274 INFO L231 Difference]: Finished difference. Result has 52 places, 45 transitions, 126 flow
[2023-11-19 07:33:13,274 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=309, PETRI_DIFFERENCE_MINUEND_FLOW=116, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=126, PETRI_PLACES=52, PETRI_TRANSITIONS=45}
[2023-11-19 07:33:13,276 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 2 predicate places.
[2023-11-19 07:33:13,276 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 45 transitions, 126 flow
[2023-11-19 07:33:13,277 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 134.875) internal successors, (1079), 8 states have internal predecessors, (1079), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-19 07:33:13,278 INFO L200 CegarLoopForPetriNet]: Found error trace
[2023-11-19 07:33:13,278 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1]
[2023-11-19 07:33:13,307 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28544478-e6cd-4c5b-a6a5-e0a85228da18/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0
[2023-11-19 07:33:13,502 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28544478-e6cd-4c5b-a6a5-e0a85228da18/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-19 07:33:13,503 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] ===
[2023-11-19 07:33:13,503 INFO L160 PredicateUnifier]: Initialized classic predicate unifier
[2023-11-19 07:33:13,503 INFO L85 PathProgramCache]: Analyzing trace with hash 1892336323, now seen corresponding path program 1 times
[2023-11-19 07:33:13,504 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-19 07:33:13,504 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [696453603]
[2023-11-19 07:33:13,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-19 07:33:13,504 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-19 07:33:13,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat
[2023-11-19 07:33:13,530 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders.
[2023-11-19 07:33:13,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat
[2023-11-19 07:33:13,568 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace
[2023-11-19 07:33:13,568 INFO L360 BasicCegarLoop]: Counterexample is feasible
[2023-11-19 07:33:13,569 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (6 of 7 remaining)
[2023-11-19 07:33:13,569 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 7 remaining)
[2023-11-19 07:33:13,569 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 7 remaining)
[2023-11-19 07:33:13,570 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 7 remaining)
[2023-11-19 07:33:13,570 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 7 remaining)
[2023-11-19 07:33:13,570 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (1 of 7 remaining)
[2023-11-19 07:33:13,570 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_LEAK (0 of 7 remaining)
[2023-11-19 07:33:13,571 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7
[2023-11-19 07:33:13,571 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1]
[2023-11-19 07:33:13,572 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis
[2023-11-19 07:33:13,572 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances.
[2023-11-19 07:33:13,599 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions.
[2023-11-19 07:33:13,603 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 173 places, 196 transitions, 419 flow
[2023-11-19 07:33:13,674 INFO L124 PetriNetUnfolderBase]: 66/480 cut-off events.
[2023-11-19 07:33:13,675 INFO L125 PetriNetUnfolderBase]: For 19/19 co-relation queries the response was YES.
[2023-11-19 07:33:13,678 INFO L83 FinitePrefix]: Finished finitePrefix Result has 505 conditions, 480 events. 66/480 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 1789 event pairs, 1 based on Foata normal form. 0/374 useless extension candidates. Maximal degree in co-relation 323. Up to 16 conditions per place.
[2023-11-19 07:33:13,679 INFO L82 GeneralOperation]: Start removeDead. Operand has 173 places, 196 transitions, 419 flow
[2023-11-19 07:33:13,685 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 173 places, 196 transitions, 419 flow
[2023-11-19 07:33:13,685 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation.
[2023-11-19 07:33:13,685 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 173 places, 196 transitions, 419 flow
[2023-11-19 07:33:13,686 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 173 places, 196 transitions, 419 flow
[2023-11-19 07:33:13,686 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 173 places, 196 transitions, 419 flow
[2023-11-19 07:33:13,756 INFO L124 PetriNetUnfolderBase]: 66/480 cut-off events.
[2023-11-19 07:33:13,756 INFO L125 PetriNetUnfolderBase]: For 19/19 co-relation queries the response was YES.
[2023-11-19 07:33:13,759 INFO L83 FinitePrefix]: Finished finitePrefix Result has 505 conditions, 480 events. 66/480 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 1789 event pairs, 1 based on Foata normal form. 0/374 useless extension candidates. Maximal degree in co-relation 323. Up to 16 conditions per place.
[2023-11-19 07:33:13,783 INFO L119 LiptonReduction]: Number of co-enabled transitions 16800
[2023-11-19 07:33:18,233 INFO L134 LiptonReduction]: Checked pairs total: 39610
[2023-11-19 07:33:18,233 INFO L136 LiptonReduction]: Total number of compositions: 157
[2023-11-19 07:33:18,235 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ========
[2023-11-19 07:33:18,235 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@36e5e7b0, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=<UNSUPPORTED>, UseSemiCommutativity=<UNSUPPORTED>, Solver=<NOT_USED>, SolverTimeout=<NOT_USED>]
[2023-11-19 07:33:18,235 INFO L358 AbstractCegarLoop]: Starting to check reachability of 7 error locations.
[2023-11-19 07:33:18,237 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder.
[2023-11-19 07:33:18,238 INFO L124 PetriNetUnfolderBase]: 0/2 cut-off events.
[2023-11-19 07:33:18,238 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES.
[2023-11-19 07:33:18,238 INFO L200 CegarLoopForPetriNet]: Found error trace
[2023-11-19 07:33:18,238 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1]
[2023-11-19 07:33:18,238 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] ===
[2023-11-19 07:33:18,239 INFO L160 PredicateUnifier]: Initialized classic predicate unifier
[2023-11-19 07:33:18,239 INFO L85 PathProgramCache]: Analyzing trace with hash 40086, now seen corresponding path program 1 times
[2023-11-19 07:33:18,239 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-19 07:33:18,239 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1294917698]
[2023-11-19 07:33:18,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-19 07:33:18,239 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-19 07:33:18,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-19 07:33:18,276 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-11-19 07:33:18,276 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-19 07:33:18,276 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1294917698]
[2023-11-19 07:33:18,277 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1294917698] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-19 07:33:18,277 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-19 07:33:18,277 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1
[2023-11-19 07:33:18,277 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2065622981]
[2023-11-19 07:33:18,277 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-19 07:33:18,277 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states
[2023-11-19 07:33:18,278 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-19 07:33:18,278 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2023-11-19 07:33:18,278 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2023-11-19 07:33:18,319 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 156 out of 353
[2023-11-19 07:33:18,320 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 82 transitions, 191 flow. Second operand has 3 states, 3 states have (on average 156.66666666666666) internal successors, (470), 3 states have internal predecessors, (470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-19 07:33:18,320 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user.
[2023-11-19 07:33:18,320 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 156 of 353
[2023-11-19 07:33:18,320 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand
[2023-11-19 07:33:22,268 INFO L124 PetriNetUnfolderBase]: 20492/31155 cut-off events.
[2023-11-19 07:33:22,268 INFO L125 PetriNetUnfolderBase]: For 719/719 co-relation queries the response was YES.
[2023-11-19 07:33:22,319 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60669 conditions, 31155 events. 20492/31155 cut-off events. For 719/719 co-relation queries the response was YES. Maximal size of possible extension queue 1008. Compared 230321 event pairs, 16947 based on Foata normal form. 7123/33475 useless extension candidates. Maximal degree in co-relation 11896. Up to 24786 conditions per place.
[2023-11-19 07:33:22,462 INFO L140 encePairwiseOnDemand]: 327/353 looper letters, 60 selfloop transitions, 2 changer transitions 1/79 dead transitions.
[2023-11-19 07:33:22,463 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 79 transitions, 311 flow
[2023-11-19 07:33:22,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states.
[2023-11-19 07:33:22,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states.
[2023-11-19 07:33:22,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 572 transitions.
[2023-11-19 07:33:22,466 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5401322001888574
[2023-11-19 07:33:22,466 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 572 transitions.
[2023-11-19 07:33:22,466 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 572 transitions.
[2023-11-19 07:33:22,466 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic.
[2023-11-19 07:33:22,467 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 572 transitions.
[2023-11-19 07:33:22,468 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 190.66666666666666) internal successors, (572), 3 states have internal predecessors, (572), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-19 07:33:22,471 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 353.0) internal successors, (1412), 4 states have internal predecessors, (1412), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-19 07:33:22,471 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 353.0) internal successors, (1412), 4 states have internal predecessors, (1412), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-19 07:33:22,471 INFO L175 Difference]: Start difference. First operand has 64 places, 82 transitions, 191 flow. Second operand 3 states and 572 transitions.
[2023-11-19 07:33:22,472 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 79 transitions, 311 flow
[2023-11-19 07:33:22,474 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 79 transitions, 311 flow, removed 0 selfloop flow, removed 0 redundant places.
[2023-11-19 07:33:22,476 INFO L231 Difference]: Finished difference. Result has 64 places, 58 transitions, 147 flow
[2023-11-19 07:33:22,476 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=353, PETRI_DIFFERENCE_MINUEND_FLOW=145, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=147, PETRI_PLACES=64, PETRI_TRANSITIONS=58}
[2023-11-19 07:33:22,477 INFO L281 CegarLoopForPetriNet]: 64 programPoint places, 0 predicate places.
[2023-11-19 07:33:22,477 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 58 transitions, 147 flow
[2023-11-19 07:33:22,478 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 156.66666666666666) internal successors, (470), 3 states have internal predecessors, (470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-19 07:33:22,478 INFO L200 CegarLoopForPetriNet]: Found error trace
[2023-11-19 07:33:22,478 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1]
[2023-11-19 07:33:22,478 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8
[2023-11-19 07:33:22,478 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] ===
[2023-11-19 07:33:22,479 INFO L160 PredicateUnifier]: Initialized classic predicate unifier
[2023-11-19 07:33:22,479 INFO L85 PathProgramCache]: Analyzing trace with hash 40084, now seen corresponding path program 1 times
[2023-11-19 07:33:22,479 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-19 07:33:22,479 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [690044444]
[2023-11-19 07:33:22,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-19 07:33:22,479 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-19 07:33:22,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-19 07:33:22,643 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-11-19 07:33:22,643 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-19 07:33:22,643 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [690044444]
[2023-11-19 07:33:22,643 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [690044444] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-19 07:33:22,643 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-19 07:33:22,643 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1
[2023-11-19 07:33:22,644 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [856914727]
[2023-11-19 07:33:22,644 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-19 07:33:22,645 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states
[2023-11-19 07:33:22,645 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-19 07:33:22,645 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2023-11-19 07:33:22,646 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2023-11-19 07:33:22,682 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 158 out of 353
[2023-11-19 07:33:22,682 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 58 transitions, 147 flow. Second operand has 3 states, 3 states have (on average 158.66666666666666) internal successors, (476), 3 states have internal predecessors, (476), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-19 07:33:22,683 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user.
[2023-11-19 07:33:22,683 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 158 of 353
[2023-11-19 07:33:22,683 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand
[2023-11-19 07:33:25,551 INFO L124 PetriNetUnfolderBase]: 19018/29402 cut-off events.
[2023-11-19 07:33:25,552 INFO L125 PetriNetUnfolderBase]: For 1284/1284 co-relation queries the response was YES.
[2023-11-19 07:33:25,592 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57437 conditions, 29402 events. 19018/29402 cut-off events. For 1284/1284 co-relation queries the response was YES. Maximal size of possible extension queue 968. Compared 218641 event pairs, 12023 based on Foata normal form. 0/26170 useless extension candidates. Maximal degree in co-relation 52410. Up to 26881 conditions per place.
[2023-11-19 07:33:25,713 INFO L140 encePairwiseOnDemand]: 348/353 looper letters, 48 selfloop transitions, 2 changer transitions 0/66 dead transitions.
[2023-11-19 07:33:25,714 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 66 transitions, 263 flow
[2023-11-19 07:33:25,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states.
[2023-11-19 07:33:25,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states.
[2023-11-19 07:33:25,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 527 transitions.
[2023-11-19 07:33:25,717 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4976392823418319
[2023-11-19 07:33:25,717 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 527 transitions.
[2023-11-19 07:33:25,717 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 527 transitions.
[2023-11-19 07:33:25,717 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic.
[2023-11-19 07:33:25,718 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 527 transitions.
[2023-11-19 07:33:25,719 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 175.66666666666666) internal successors, (527), 3 states have internal predecessors, (527), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-19 07:33:25,722 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 353.0) internal successors, (1412), 4 states have internal predecessors, (1412), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-19 07:33:25,722 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 353.0) internal successors, (1412), 4 states have internal predecessors, (1412), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-19 07:33:25,723 INFO L175 Difference]: Start difference. First operand has 64 places, 58 transitions, 147 flow. Second operand 3 states and 527 transitions.
[2023-11-19 07:33:25,723 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 66 transitions, 263 flow
[2023-11-19 07:33:25,749 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 66 transitions, 259 flow, removed 0 selfloop flow, removed 2 redundant places.
[2023-11-19 07:33:25,751 INFO L231 Difference]: Finished difference. Result has 64 places, 59 transitions, 159 flow
[2023-11-19 07:33:25,751 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=353, PETRI_DIFFERENCE_MINUEND_FLOW=143, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=159, PETRI_PLACES=64, PETRI_TRANSITIONS=59}
[2023-11-19 07:33:25,753 INFO L281 CegarLoopForPetriNet]: 64 programPoint places, 0 predicate places.
[2023-11-19 07:33:25,753 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 59 transitions, 159 flow
[2023-11-19 07:33:25,753 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 158.66666666666666) internal successors, (476), 3 states have internal predecessors, (476), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-19 07:33:25,754 INFO L200 CegarLoopForPetriNet]: Found error trace
[2023-11-19 07:33:25,754 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1]
[2023-11-19 07:33:25,754 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9
[2023-11-19 07:33:25,754 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] ===
[2023-11-19 07:33:25,754 INFO L160 PredicateUnifier]: Initialized classic predicate unifier
[2023-11-19 07:33:25,755 INFO L85 PathProgramCache]: Analyzing trace with hash -1602811480, now seen corresponding path program 1 times
[2023-11-19 07:33:25,755 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-19 07:33:25,755 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1180217186]
[2023-11-19 07:33:25,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-19 07:33:25,755 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-19 07:33:25,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-19 07:33:25,850 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-11-19 07:33:25,850 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-19 07:33:25,850 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1180217186]
[2023-11-19 07:33:25,850 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1180217186] provided 0 perfect and 1 imperfect interpolant sequences
[2023-11-19 07:33:25,850 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [15571283]
[2023-11-19 07:33:25,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-19 07:33:25,851 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-19 07:33:25,851 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28544478-e6cd-4c5b-a6a5-e0a85228da18/bin/uautomizer-verify-uCwYo4JHxu/z3
[2023-11-19 07:33:25,852 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28544478-e6cd-4c5b-a6a5-e0a85228da18/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-19 07:33:25,868 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28544478-e6cd-4c5b-a6a5-e0a85228da18/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process
[2023-11-19 07:33:25,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-19 07:33:25,937 INFO L262 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 9 conjunts are in the unsatisfiable core
[2023-11-19 07:33:25,938 INFO L285 TraceCheckSpWp]: Computing forward predicates...
[2023-11-19 07:33:25,953 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1
[2023-11-19 07:33:25,993 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-11-19 07:33:25,993 INFO L327 TraceCheckSpWp]: Computing backward predicates...
[2023-11-19 07:33:26,036 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-11-19 07:33:26,037 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [15571283] provided 0 perfect and 2 imperfect interpolant sequences
[2023-11-19 07:33:26,037 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences.
[2023-11-19 07:33:26,037 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 5
[2023-11-19 07:33:26,037 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [254536151]
[2023-11-19 07:33:26,038 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton
[2023-11-19 07:33:26,038 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states
[2023-11-19 07:33:26,038 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-19 07:33:26,039 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants.
[2023-11-19 07:33:26,039 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42
[2023-11-19 07:33:26,155 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 155 out of 353
[2023-11-19 07:33:26,157 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 59 transitions, 159 flow. Second operand has 7 states, 7 states have (on average 156.71428571428572) internal successors, (1097), 7 states have internal predecessors, (1097), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-19 07:33:26,157 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user.
[2023-11-19 07:33:26,157 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 155 of 353
[2023-11-19 07:33:26,157 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand
[2023-11-19 07:33:28,670 INFO L124 PetriNetUnfolderBase]: 17704/25962 cut-off events.
[2023-11-19 07:33:28,670 INFO L125 PetriNetUnfolderBase]: For 2141/2141 co-relation queries the response was YES.
[2023-11-19 07:33:28,708 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53017 conditions, 25962 events. 17704/25962 cut-off events. For 2141/2141 co-relation queries the response was YES. Maximal size of possible extension queue 834. Compared 181468 event pairs, 2200 based on Foata normal form. 7/23456 useless extension candidates. Maximal degree in co-relation 7805. Up to 20136 conditions per place.
[2023-11-19 07:33:28,856 INFO L140 encePairwiseOnDemand]: 348/353 looper letters, 100 selfloop transitions, 8 changer transitions 0/124 dead transitions.
[2023-11-19 07:33:28,856 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 124 transitions, 509 flow
[2023-11-19 07:33:28,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states.
[2023-11-19 07:33:28,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states.
[2023-11-19 07:33:28,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1043 transitions.
[2023-11-19 07:33:28,862 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49244570349386213
[2023-11-19 07:33:28,862 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1043 transitions.
[2023-11-19 07:33:28,862 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1043 transitions.
[2023-11-19 07:33:28,863 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic.
[2023-11-19 07:33:28,863 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1043 transitions.
[2023-11-19 07:33:29,052 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 173.83333333333334) internal successors, (1043), 6 states have internal predecessors, (1043), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-19 07:33:29,056 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 353.0) internal successors, (2471), 7 states have internal predecessors, (2471), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-19 07:33:29,057 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 353.0) internal successors, (2471), 7 states have internal predecessors, (2471), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-19 07:33:29,057 INFO L175 Difference]: Start difference. First operand has 64 places, 59 transitions, 159 flow. Second operand 6 states and 1043 transitions.
[2023-11-19 07:33:29,057 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 124 transitions, 509 flow
[2023-11-19 07:33:29,060 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 124 transitions, 507 flow, removed 0 selfloop flow, removed 1 redundant places.
[2023-11-19 07:33:29,062 INFO L231 Difference]: Finished difference. Result has 67 places, 61 transitions, 181 flow
[2023-11-19 07:33:29,063 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=353, PETRI_DIFFERENCE_MINUEND_FLOW=153, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=181, PETRI_PLACES=67, PETRI_TRANSITIONS=61}
[2023-11-19 07:33:29,063 INFO L281 CegarLoopForPetriNet]: 64 programPoint places, 3 predicate places.
[2023-11-19 07:33:29,069 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 61 transitions, 181 flow
[2023-11-19 07:33:29,070 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 156.71428571428572) internal successors, (1097), 7 states have internal predecessors, (1097), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-19 07:33:29,070 INFO L200 CegarLoopForPetriNet]: Found error trace
[2023-11-19 07:33:29,070 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1]
[2023-11-19 07:33:29,097 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28544478-e6cd-4c5b-a6a5-e0a85228da18/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0
[2023-11-19 07:33:29,289 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28544478-e6cd-4c5b-a6a5-e0a85228da18/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-19 07:33:29,290 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] ===
[2023-11-19 07:33:29,290 INFO L160 PredicateUnifier]: Initialized classic predicate unifier
[2023-11-19 07:33:29,290 INFO L85 PathProgramCache]: Analyzing trace with hash 2042523985, now seen corresponding path program 1 times
[2023-11-19 07:33:29,290 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-19 07:33:29,290 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [200406986]
[2023-11-19 07:33:29,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-19 07:33:29,290 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-19 07:33:29,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-19 07:33:29,424 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked.
[2023-11-19 07:33:29,425 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-19 07:33:29,425 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [200406986]
[2023-11-19 07:33:29,425 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [200406986] provided 0 perfect and 1 imperfect interpolant sequences
[2023-11-19 07:33:29,425 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1176195379]
[2023-11-19 07:33:29,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-19 07:33:29,426 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-19 07:33:29,426 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28544478-e6cd-4c5b-a6a5-e0a85228da18/bin/uautomizer-verify-uCwYo4JHxu/z3
[2023-11-19 07:33:29,427 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28544478-e6cd-4c5b-a6a5-e0a85228da18/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-19 07:33:29,448 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28544478-e6cd-4c5b-a6a5-e0a85228da18/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process
[2023-11-19 07:33:29,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-19 07:33:29,539 INFO L262 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 7 conjunts are in the unsatisfiable core
[2023-11-19 07:33:29,542 INFO L285 TraceCheckSpWp]: Computing forward predicates...
[2023-11-19 07:33:29,631 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-11-19 07:33:29,631 INFO L327 TraceCheckSpWp]: Computing backward predicates...
[2023-11-19 07:33:29,694 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 18
[2023-11-19 07:33:29,751 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-11-19 07:33:29,751 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1176195379] provided 0 perfect and 2 imperfect interpolant sequences
[2023-11-19 07:33:29,752 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences.
[2023-11-19 07:33:29,752 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 11
[2023-11-19 07:33:29,754 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [202210772]
[2023-11-19 07:33:29,755 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton
[2023-11-19 07:33:29,755 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states
[2023-11-19 07:33:29,755 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-19 07:33:29,756 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants.
[2023-11-19 07:33:29,757 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156
[2023-11-19 07:33:30,064 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 149 out of 353
[2023-11-19 07:33:30,067 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 61 transitions, 181 flow. Second operand has 13 states, 13 states have (on average 151.30769230769232) internal successors, (1967), 13 states have internal predecessors, (1967), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-19 07:33:30,067 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user.
[2023-11-19 07:33:30,067 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 149 of 353
[2023-11-19 07:33:30,067 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand
[2023-11-19 07:33:32,334 INFO L124 PetriNetUnfolderBase]: 15321/22514 cut-off events.
[2023-11-19 07:33:32,334 INFO L125 PetriNetUnfolderBase]: For 3628/3628 co-relation queries the response was YES.
[2023-11-19 07:33:32,360 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47816 conditions, 22514 events. 15321/22514 cut-off events. For 3628/3628 co-relation queries the response was YES. Maximal size of possible extension queue 700. Compared 155246 event pairs, 2044 based on Foata normal form. 0/20979 useless extension candidates. Maximal degree in co-relation 5054. Up to 10660 conditions per place.
[2023-11-19 07:33:32,462 INFO L140 encePairwiseOnDemand]: 343/353 looper letters, 126 selfloop transitions, 13 changer transitions 0/155 dead transitions.
[2023-11-19 07:33:32,462 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 155 transitions, 656 flow
[2023-11-19 07:33:32,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states.
[2023-11-19 07:33:32,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states.
[2023-11-19 07:33:32,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1182 transitions.
[2023-11-19 07:33:32,468 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4783488466208013
[2023-11-19 07:33:32,468 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1182 transitions.
[2023-11-19 07:33:32,468 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1182 transitions.
[2023-11-19 07:33:32,470 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic.
[2023-11-19 07:33:32,470 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1182 transitions.
[2023-11-19 07:33:32,474 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 168.85714285714286) internal successors, (1182), 7 states have internal predecessors, (1182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-19 07:33:32,479 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 353.0) internal successors, (2824), 8 states have internal predecessors, (2824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-19 07:33:32,480 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 353.0) internal successors, (2824), 8 states have internal predecessors, (2824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-19 07:33:32,480 INFO L175 Difference]: Start difference. First operand has 67 places, 61 transitions, 181 flow. Second operand 7 states and 1182 transitions.
[2023-11-19 07:33:32,481 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 155 transitions, 656 flow
[2023-11-19 07:33:32,484 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 155 transitions, 635 flow, removed 6 selfloop flow, removed 3 redundant places.
[2023-11-19 07:33:32,487 INFO L231 Difference]: Finished difference. Result has 73 places, 64 transitions, 214 flow
[2023-11-19 07:33:32,487 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=353, PETRI_DIFFERENCE_MINUEND_FLOW=160, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=214, PETRI_PLACES=73, PETRI_TRANSITIONS=64}
[2023-11-19 07:33:32,488 INFO L281 CegarLoopForPetriNet]: 64 programPoint places, 9 predicate places.
[2023-11-19 07:33:32,488 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 64 transitions, 214 flow
[2023-11-19 07:33:32,490 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 151.30769230769232) internal successors, (1967), 13 states have internal predecessors, (1967), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-19 07:33:32,490 INFO L200 CegarLoopForPetriNet]: Found error trace
[2023-11-19 07:33:32,490 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1]
[2023-11-19 07:33:32,517 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28544478-e6cd-4c5b-a6a5-e0a85228da18/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0
[2023-11-19 07:33:32,704 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28544478-e6cd-4c5b-a6a5-e0a85228da18/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-19 07:33:32,704 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] ===
[2023-11-19 07:33:32,704 INFO L160 PredicateUnifier]: Initialized classic predicate unifier
[2023-11-19 07:33:32,704 INFO L85 PathProgramCache]: Analyzing trace with hash 2042528273, now seen corresponding path program 1 times
[2023-11-19 07:33:32,705 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-19 07:33:32,705 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2027962444]
[2023-11-19 07:33:32,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-19 07:33:32,705 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-19 07:33:32,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-19 07:33:32,820 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked.
[2023-11-19 07:33:32,820 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-19 07:33:32,821 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2027962444]
[2023-11-19 07:33:32,821 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2027962444] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-19 07:33:32,821 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-19 07:33:32,821 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1
[2023-11-19 07:33:32,821 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1702688483]
[2023-11-19 07:33:32,822 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-19 07:33:32,822 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states
[2023-11-19 07:33:32,822 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-19 07:33:32,823 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2023-11-19 07:33:32,823 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2023-11-19 07:33:32,844 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 158 out of 353
[2023-11-19 07:33:32,845 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 64 transitions, 214 flow. Second operand has 3 states, 3 states have (on average 160.66666666666666) internal successors, (482), 3 states have internal predecessors, (482), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-19 07:33:32,846 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user.
[2023-11-19 07:33:32,846 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 158 of 353
[2023-11-19 07:33:32,846 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand
[2023-11-19 07:33:38,062 INFO L124 PetriNetUnfolderBase]: 34047/50409 cut-off events.
[2023-11-19 07:33:38,062 INFO L125 PetriNetUnfolderBase]: For 15028/15028 co-relation queries the response was YES.
[2023-11-19 07:33:38,145 INFO L83 FinitePrefix]: Finished finitePrefix Result has 111629 conditions, 50409 events. 34047/50409 cut-off events. For 15028/15028 co-relation queries the response was YES. Maximal size of possible extension queue 1335. Compared 356588 event pairs, 12706 based on Foata normal form. 0/48751 useless extension candidates. Maximal degree in co-relation 98856. Up to 35577 conditions per place.
[2023-11-19 07:33:38,502 INFO L140 encePairwiseOnDemand]: 344/353 looper letters, 93 selfloop transitions, 8 changer transitions 0/113 dead transitions.
[2023-11-19 07:33:38,502 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 113 transitions, 591 flow
[2023-11-19 07:33:38,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states.
[2023-11-19 07:33:38,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states.
[2023-11-19 07:33:38,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 562 transitions.
[2023-11-19 07:33:38,506 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5306893295561851
[2023-11-19 07:33:38,506 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 562 transitions.
[2023-11-19 07:33:38,506 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 562 transitions.
[2023-11-19 07:33:38,507 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic.
[2023-11-19 07:33:38,507 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 562 transitions.
[2023-11-19 07:33:38,509 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 187.33333333333334) internal successors, (562), 3 states have internal predecessors, (562), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-19 07:33:38,512 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 353.0) internal successors, (1412), 4 states have internal predecessors, (1412), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-19 07:33:38,513 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 353.0) internal successors, (1412), 4 states have internal predecessors, (1412), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-19 07:33:38,513 INFO L175 Difference]: Start difference. First operand has 73 places, 64 transitions, 214 flow. Second operand 3 states and 562 transitions.
[2023-11-19 07:33:38,514 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 113 transitions, 591 flow
[2023-11-19 07:33:39,109 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 113 transitions, 573 flow, removed 0 selfloop flow, removed 3 redundant places.
[2023-11-19 07:33:39,110 INFO L231 Difference]: Finished difference. Result has 74 places, 71 transitions, 266 flow
[2023-11-19 07:33:39,111 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=353, PETRI_DIFFERENCE_MINUEND_FLOW=204, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=266, PETRI_PLACES=74, PETRI_TRANSITIONS=71}
[2023-11-19 07:33:39,111 INFO L281 CegarLoopForPetriNet]: 64 programPoint places, 10 predicate places.
[2023-11-19 07:33:39,111 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 71 transitions, 266 flow
[2023-11-19 07:33:39,111 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 160.66666666666666) internal successors, (482), 3 states have internal predecessors, (482), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-19 07:33:39,112 INFO L200 CegarLoopForPetriNet]: Found error trace
[2023-11-19 07:33:39,112 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1]
[2023-11-19 07:33:39,112 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12
[2023-11-19 07:33:39,112 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] ===
[2023-11-19 07:33:39,112 INFO L160 PredicateUnifier]: Initialized classic predicate unifier
[2023-11-19 07:33:39,112 INFO L85 PathProgramCache]: Analyzing trace with hash 1034057335, now seen corresponding path program 1 times
[2023-11-19 07:33:39,112 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-19 07:33:39,113 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [634777760]
[2023-11-19 07:33:39,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-19 07:33:39,113 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-19 07:33:39,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat
[2023-11-19 07:33:39,141 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders.
[2023-11-19 07:33:39,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat
[2023-11-19 07:33:39,161 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace
[2023-11-19 07:33:39,161 INFO L360 BasicCegarLoop]: Counterexample is feasible
[2023-11-19 07:33:39,161 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (6 of 7 remaining)
[2023-11-19 07:33:39,161 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 7 remaining)
[2023-11-19 07:33:39,162 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 7 remaining)
[2023-11-19 07:33:39,162 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 7 remaining)
[2023-11-19 07:33:39,162 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 7 remaining)
[2023-11-19 07:33:39,162 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (1 of 7 remaining)
[2023-11-19 07:33:39,163 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_LEAK (0 of 7 remaining)
[2023-11-19 07:33:39,163 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13
[2023-11-19 07:33:39,163 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1]
[2023-11-19 07:33:39,164 WARN L233 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis
[2023-11-19 07:33:39,164 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances.
[2023-11-19 07:33:39,194 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions.
[2023-11-19 07:33:39,197 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 198 places, 226 transitions, 492 flow
[2023-11-19 07:33:39,307 INFO L124 PetriNetUnfolderBase]: 101/737 cut-off events.
[2023-11-19 07:33:39,308 INFO L125 PetriNetUnfolderBase]: For 48/48 co-relation queries the response was YES.
[2023-11-19 07:33:39,314 INFO L83 FinitePrefix]: Finished finitePrefix Result has 788 conditions, 737 events. 101/737 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 3182 event pairs, 6 based on Foata normal form. 0/573 useless extension candidates. Maximal degree in co-relation 500. Up to 32 conditions per place.
[2023-11-19 07:33:39,314 INFO L82 GeneralOperation]: Start removeDead. Operand has 198 places, 226 transitions, 492 flow
[2023-11-19 07:33:39,321 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 198 places, 226 transitions, 492 flow
[2023-11-19 07:33:39,322 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation.
[2023-11-19 07:33:39,322 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 198 places, 226 transitions, 492 flow
[2023-11-19 07:33:39,322 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 198 places, 226 transitions, 492 flow
[2023-11-19 07:33:39,323 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 198 places, 226 transitions, 492 flow
[2023-11-19 07:33:39,434 INFO L124 PetriNetUnfolderBase]: 101/737 cut-off events.
[2023-11-19 07:33:39,434 INFO L125 PetriNetUnfolderBase]: For 48/48 co-relation queries the response was YES.
[2023-11-19 07:33:39,440 INFO L83 FinitePrefix]: Finished finitePrefix Result has 788 conditions, 737 events. 101/737 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 3182 event pairs, 6 based on Foata normal form. 0/573 useless extension candidates. Maximal degree in co-relation 500. Up to 32 conditions per place.
[2023-11-19 07:33:39,466 INFO L119 LiptonReduction]: Number of co-enabled transitions 25872