./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/weaver/popl20-more-nonblocking-counter-alt2.wvr.c --full-output --architecture 32bit
--------------------------------------------------------------------------------
Checking for ERROR reachability
Using default analysis
Version cf1a7837
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_0eaff618-de43-4165-89d4-83d22fe2c059/bin/uautomizer-verify-uTZkv6EMXl/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0eaff618-de43-4165-89d4-83d22fe2c059/bin/uautomizer-verify-uTZkv6EMXl/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0eaff618-de43-4165-89d4-83d22fe2c059/bin/uautomizer-verify-uTZkv6EMXl/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0eaff618-de43-4165-89d4-83d22fe2c059/bin/uautomizer-verify-uTZkv6EMXl/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/popl20-more-nonblocking-counter-alt2.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0eaff618-de43-4165-89d4-83d22fe2c059/bin/uautomizer-verify-uTZkv6EMXl/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0eaff618-de43-4165-89d4-83d22fe2c059/bin/uautomizer-verify-uTZkv6EMXl --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) )
--witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 87e1a1d3acb3ee9b7a4a97eb7b14df31d5b38b7566b1218cea0dabfe5ec8ddbd
--- Real Ultimate output ---
This is Ultimate 0.2.3-dev-cf1a783
[2023-11-12 02:19:42,921 INFO L188 SettingsManager]: Resetting all preferences to default values...
[2023-11-12 02:19:43,031 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0eaff618-de43-4165-89d4-83d22fe2c059/bin/uautomizer-verify-uTZkv6EMXl/config/svcomp-Reach-32bit-Automizer_Default.epf
[2023-11-12 02:19:43,042 WARN L101 SettingsManager]: Preference file contains the following unknown settings:
[2023-11-12 02:19:43,043 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class
[2023-11-12 02:19:43,078 INFO L130 SettingsManager]: Preferences different from defaults after loading the file:
[2023-11-12 02:19:43,079 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults:
[2023-11-12 02:19:43,080 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR;
[2023-11-12 02:19:43,082 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults:
[2023-11-12 02:19:43,087 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS
[2023-11-12 02:19:43,088 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults:
[2023-11-12 02:19:43,089 INFO L153 SettingsManager]: * Create parallel compositions if possible=false
[2023-11-12 02:19:43,090 INFO L153 SettingsManager]: * Use SBE=true
[2023-11-12 02:19:43,092 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults:
[2023-11-12 02:19:43,092 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE
[2023-11-12 02:19:43,093 INFO L153 SettingsManager]: * sizeof long=4
[2023-11-12 02:19:43,093 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true
[2023-11-12 02:19:43,094 INFO L153 SettingsManager]: * sizeof POINTER=4
[2023-11-12 02:19:43,094 INFO L153 SettingsManager]: * Check division by zero=IGNORE
[2023-11-12 02:19:43,094 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE
[2023-11-12 02:19:43,095 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE
[2023-11-12 02:19:43,095 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE
[2023-11-12 02:19:43,096 INFO L153 SettingsManager]: * sizeof long double=12
[2023-11-12 02:19:43,096 INFO L153 SettingsManager]: * Check if freed pointer was valid=false
[2023-11-12 02:19:43,097 INFO L153 SettingsManager]: * Use constant arrays=true
[2023-11-12 02:19:43,098 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults:
[2023-11-12 02:19:43,098 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements
[2023-11-12 02:19:43,098 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode
[2023-11-12 02:19:43,099 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2023-11-12 02:19:43,099 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults:
[2023-11-12 02:19:43,101 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP
[2023-11-12 02:19:43,101 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads
[2023-11-12 02:19:43,101 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL
[2023-11-12 02:19:43,101 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2023-11-12 02:19:43,102 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET
[2023-11-12 02:19:43,102 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true
[2023-11-12 02:19:43,102 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO
[2023-11-12 02:19:43,102 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode
[2023-11-12 02:19:43,103 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC
[2023-11-12 02:19:43,103 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_0eaff618-de43-4165-89d4-83d22fe2c059/bin/uautomizer-verify-uTZkv6EMXl/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$1
WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations
WARNING: All illegal access operations will be denied in a future release
Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main
Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0eaff618-de43-4165-89d4-83d22fe2c059/bin/uautomizer-verify-uTZkv6EMXl
Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness
Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false
Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) )
Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer
Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit
Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 87e1a1d3acb3ee9b7a4a97eb7b14df31d5b38b7566b1218cea0dabfe5ec8ddbd
[2023-11-12 02:19:43,411 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp
[2023-11-12 02:19:43,439 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized
[2023-11-12 02:19:43,442 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected.
[2023-11-12 02:19:43,443 INFO L270 PluginConnector]: Initializing CDTParser...
[2023-11-12 02:19:43,444 INFO L274 PluginConnector]: CDTParser initialized
[2023-11-12 02:19:43,446 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0eaff618-de43-4165-89d4-83d22fe2c059/bin/uautomizer-verify-uTZkv6EMXl/../../sv-benchmarks/c/weaver/popl20-more-nonblocking-counter-alt2.wvr.c
[2023-11-12 02:19:46,471 INFO L533 CDTParser]: Created temporary CDT project at NULL
[2023-11-12 02:19:46,772 INFO L384 CDTParser]: Found 1 translation units.
[2023-11-12 02:19:46,773 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0eaff618-de43-4165-89d4-83d22fe2c059/sv-benchmarks/c/weaver/popl20-more-nonblocking-counter-alt2.wvr.c
[2023-11-12 02:19:46,783 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0eaff618-de43-4165-89d4-83d22fe2c059/bin/uautomizer-verify-uTZkv6EMXl/data/fdbecfda8/655dcb153e2d49cf943c00408694c284/FLAGf2a06bd72
[2023-11-12 02:19:46,799 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0eaff618-de43-4165-89d4-83d22fe2c059/bin/uautomizer-verify-uTZkv6EMXl/data/fdbecfda8/655dcb153e2d49cf943c00408694c284
[2023-11-12 02:19:46,806 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] #######################
[2023-11-12 02:19:46,808 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements.
[2023-11-12 02:19:46,811 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator----------------------------
[2023-11-12 02:19:46,811 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator...
[2023-11-12 02:19:46,816 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized
[2023-11-12 02:19:46,817 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 02:19:46" (1/1) ...
[2023-11-12 02:19:46,818 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@192891c6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:19:46, skipping insertion in model container
[2023-11-12 02:19:46,818 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 02:19:46" (1/1) ...
[2023-11-12 02:19:46,845 INFO L177 MainTranslator]: Built tables and reachable declarations
[2023-11-12 02:19:47,084 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0eaff618-de43-4165-89d4-83d22fe2c059/sv-benchmarks/c/weaver/popl20-more-nonblocking-counter-alt2.wvr.c[2173,2186]
[2023-11-12 02:19:47,090 INFO L209 PostProcessor]: Analyzing one entry point: main
[2023-11-12 02:19:47,102 INFO L202 MainTranslator]: Completed pre-run
[2023-11-12 02:19:47,136 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0eaff618-de43-4165-89d4-83d22fe2c059/sv-benchmarks/c/weaver/popl20-more-nonblocking-counter-alt2.wvr.c[2173,2186]
[2023-11-12 02:19:47,137 INFO L209 PostProcessor]: Analyzing one entry point: main
[2023-11-12 02:19:47,146 WARN L672 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler.
[2023-11-12 02:19:47,146 WARN L672 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler.
[2023-11-12 02:19:47,154 INFO L206 MainTranslator]: Completed translation
[2023-11-12 02:19:47,155 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:19:47 WrapperNode
[2023-11-12 02:19:47,156 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator----------------------------
[2023-11-12 02:19:47,161 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner----------------------------
[2023-11-12 02:19:47,162 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner...
[2023-11-12 02:19:47,162 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized
[2023-11-12 02:19:47,169 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:19:47" (1/1) ...
[2023-11-12 02:19:47,176 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:19:47" (1/1) ...
[2023-11-12 02:19:47,202 INFO L138 Inliner]: procedures = 21, calls = 24, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 56
[2023-11-12 02:19:47,202 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner----------------------------
[2023-11-12 02:19:47,203 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor----------------------------
[2023-11-12 02:19:47,203 INFO L270 PluginConnector]: Initializing Boogie Preprocessor...
[2023-11-12 02:19:47,204 INFO L274 PluginConnector]: Boogie Preprocessor initialized
[2023-11-12 02:19:47,214 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:19:47" (1/1) ...
[2023-11-12 02:19:47,214 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:19:47" (1/1) ...
[2023-11-12 02:19:47,223 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:19:47" (1/1) ...
[2023-11-12 02:19:47,223 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:19:47" (1/1) ...
[2023-11-12 02:19:47,228 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:19:47" (1/1) ...
[2023-11-12 02:19:47,234 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:19:47" (1/1) ...
[2023-11-12 02:19:47,241 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:19:47" (1/1) ...
[2023-11-12 02:19:47,243 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:19:47" (1/1) ...
[2023-11-12 02:19:47,246 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor----------------------------
[2023-11-12 02:19:47,252 INFO L112 PluginConnector]: ------------------------RCFGBuilder----------------------------
[2023-11-12 02:19:47,252 INFO L270 PluginConnector]: Initializing RCFGBuilder...
[2023-11-12 02:19:47,252 INFO L274 PluginConnector]: RCFGBuilder initialized
[2023-11-12 02:19:47,253 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:19:47" (1/1) ...
[2023-11-12 02:19:47,260 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2023-11-12 02:19:47,276 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0eaff618-de43-4165-89d4-83d22fe2c059/bin/uautomizer-verify-uTZkv6EMXl/z3
[2023-11-12 02:19:47,291 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0eaff618-de43-4165-89d4-83d22fe2c059/bin/uautomizer-verify-uTZkv6EMXl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null)
[2023-11-12 02:19:47,297 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0eaff618-de43-4165-89d4-83d22fe2c059/bin/uautomizer-verify-uTZkv6EMXl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process
[2023-11-12 02:19:47,326 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit
[2023-11-12 02:19:47,327 INFO L130 BoogieDeclarations]: Found specification of procedure thread1
[2023-11-12 02:19:47,327 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1
[2023-11-12 02:19:47,327 INFO L130 BoogieDeclarations]: Found specification of procedure thread2
[2023-11-12 02:19:47,327 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2
[2023-11-12 02:19:47,327 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int
[2023-11-12 02:19:47,327 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack
[2023-11-12 02:19:47,328 INFO L130 BoogieDeclarations]: Found specification of procedure write~int
[2023-11-12 02:19:47,328 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end
[2023-11-12 02:19:47,328 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin
[2023-11-12 02:19:47,328 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start
[2023-11-12 02:19:47,328 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start
[2023-11-12 02:19:47,328 INFO L130 BoogieDeclarations]: Found specification of procedure read~int
[2023-11-12 02:19:47,328 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc
[2023-11-12 02:19:47,330 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement
[2023-11-12 02:19:47,418 INFO L236 CfgBuilder]: Building ICFG
[2023-11-12 02:19:47,419 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation
[2023-11-12 02:19:47,665 INFO L277 CfgBuilder]: Performing block encoding
[2023-11-12 02:19:47,701 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start)
[2023-11-12 02:19:47,701 INFO L302 CfgBuilder]: Removed 2 assume(true) statements.
[2023-11-12 02:19:47,703 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 02:19:47 BoogieIcfgContainer
[2023-11-12 02:19:47,704 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder----------------------------
[2023-11-12 02:19:47,709 INFO L112 PluginConnector]: ------------------------TraceAbstraction----------------------------
[2023-11-12 02:19:47,709 INFO L270 PluginConnector]: Initializing TraceAbstraction...
[2023-11-12 02:19:47,712 INFO L274 PluginConnector]: TraceAbstraction initialized
[2023-11-12 02:19:47,717 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.11 02:19:46" (1/3) ...
[2023-11-12 02:19:47,718 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@61350875 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 02:19:47, skipping insertion in model container
[2023-11-12 02:19:47,718 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:19:47" (2/3) ...
[2023-11-12 02:19:47,719 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@61350875 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 02:19:47, skipping insertion in model container
[2023-11-12 02:19:47,719 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 02:19:47" (3/3) ...
[2023-11-12 02:19:47,722 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-more-nonblocking-counter-alt2.wvr.c
[2023-11-12 02:19:47,731 WARN L146 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program
[2023-11-12 02:19:47,739 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION
[2023-11-12 02:19:47,739 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations.
[2023-11-12 02:19:47,740 INFO L521 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances.
[2023-11-12 02:19:47,821 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions.
[2023-11-12 02:19:47,870 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 86 places, 85 transitions, 184 flow
[2023-11-12 02:19:47,922 INFO L124 PetriNetUnfolderBase]: 6/83 cut-off events.
[2023-11-12 02:19:47,923 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES.
[2023-11-12 02:19:47,928 INFO L83 FinitePrefix]: Finished finitePrefix Result has 92 conditions, 83 events. 6/83 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 47 event pairs, 0 based on Foata normal form. 0/76 useless extension candidates. Maximal degree in co-relation 50. Up to 2 conditions per place.
[2023-11-12 02:19:47,928 INFO L82 GeneralOperation]: Start removeDead. Operand has 86 places, 85 transitions, 184 flow
[2023-11-12 02:19:47,932 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 75 places, 74 transitions, 160 flow
[2023-11-12 02:19:47,936 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation.
[2023-11-12 02:19:47,946 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 75 places, 74 transitions, 160 flow
[2023-11-12 02:19:47,949 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 75 places, 74 transitions, 160 flow
[2023-11-12 02:19:47,949 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 75 places, 74 transitions, 160 flow
[2023-11-12 02:19:47,978 INFO L124 PetriNetUnfolderBase]: 6/74 cut-off events.
[2023-11-12 02:19:47,978 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES.
[2023-11-12 02:19:47,979 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83 conditions, 74 events. 6/74 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 46 event pairs, 0 based on Foata normal form. 0/68 useless extension candidates. Maximal degree in co-relation 50. Up to 2 conditions per place.
[2023-11-12 02:19:47,981 INFO L119 LiptonReduction]: Number of co-enabled transitions 504
[2023-11-12 02:19:50,358 INFO L134 LiptonReduction]: Checked pairs total: 528
[2023-11-12 02:19:50,358 INFO L136 LiptonReduction]: Total number of compositions: 70
[2023-11-12 02:19:50,374 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ========
[2023-11-12 02:19:50,380 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopHeads, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@382c3973, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=<UNSUPPORTED>, UseSemiCommutativity=<UNSUPPORTED>, Solver=<NOT_USED>, SolverTimeout=<NOT_USED>]
[2023-11-12 02:19:50,381 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations.
[2023-11-12 02:19:50,386 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder.
[2023-11-12 02:19:50,386 INFO L124 PetriNetUnfolderBase]: 2/14 cut-off events.
[2023-11-12 02:19:50,387 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES.
[2023-11-12 02:19:50,387 INFO L200 CegarLoopForPetriNet]: Found error trace
[2023-11-12 02:19:50,388 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2023-11-12 02:19:50,388 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] ===
[2023-11-12 02:19:50,393 INFO L160 PredicateUnifier]: Initialized classic predicate unifier
[2023-11-12 02:19:50,393 INFO L85 PathProgramCache]: Analyzing trace with hash 640812022, now seen corresponding path program 1 times
[2023-11-12 02:19:50,403 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-12 02:19:50,403 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1294623469]
[2023-11-12 02:19:50,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-12 02:19:50,404 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-12 02:19:50,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-12 02:19:50,930 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-11-12 02:19:50,931 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-12 02:19:50,931 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1294623469]
[2023-11-12 02:19:50,932 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1294623469] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-12 02:19:50,932 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-12 02:19:50,933 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1
[2023-11-12 02:19:50,934 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1827340806]
[2023-11-12 02:19:50,935 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-12 02:19:50,944 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states
[2023-11-12 02:19:50,950 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-12 02:19:50,981 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2023-11-12 02:19:50,982 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2023-11-12 02:19:50,999 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 73 out of 155
[2023-11-12 02:19:51,003 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 20 places, 15 transitions, 42 flow. Second operand has 3 states, 3 states have (on average 77.33333333333333) internal successors, (232), 3 states have internal predecessors, (232), 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)
[2023-11-12 02:19:51,003 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user.
[2023-11-12 02:19:51,003 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 73 of 155
[2023-11-12 02:19:51,005 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand
[2023-11-12 02:19:51,135 INFO L124 PetriNetUnfolderBase]: 68/124 cut-off events.
[2023-11-12 02:19:51,135 INFO L125 PetriNetUnfolderBase]: For 16/16 co-relation queries the response was YES.
[2023-11-12 02:19:51,136 INFO L83 FinitePrefix]: Finished finitePrefix Result has 272 conditions, 124 events. 68/124 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 309 event pairs, 24 based on Foata normal form. 1/95 useless extension candidates. Maximal degree in co-relation 200. Up to 64 conditions per place.
[2023-11-12 02:19:51,140 INFO L140 encePairwiseOnDemand]: 152/155 looper letters, 20 selfloop transitions, 2 changer transitions 4/26 dead transitions.
[2023-11-12 02:19:51,141 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 22 places, 26 transitions, 125 flow
[2023-11-12 02:19:51,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states.
[2023-11-12 02:19:51,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states.
[2023-11-12 02:19:51,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 246 transitions.
[2023-11-12 02:19:51,164 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5290322580645161
[2023-11-12 02:19:51,165 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 246 transitions.
[2023-11-12 02:19:51,166 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 246 transitions.
[2023-11-12 02:19:51,168 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic.
[2023-11-12 02:19:51,171 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 246 transitions.
[2023-11-12 02:19:51,177 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 82.0) internal successors, (246), 3 states have internal predecessors, (246), 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)
[2023-11-12 02:19:51,183 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 155.0) internal successors, (620), 4 states have internal predecessors, (620), 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)
[2023-11-12 02:19:51,184 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 155.0) internal successors, (620), 4 states have internal predecessors, (620), 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)
[2023-11-12 02:19:51,186 INFO L175 Difference]: Start difference. First operand has 20 places, 15 transitions, 42 flow. Second operand 3 states and 246 transitions.
[2023-11-12 02:19:51,187 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 22 places, 26 transitions, 125 flow
[2023-11-12 02:19:51,190 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 18 places, 26 transitions, 111 flow, removed 0 selfloop flow, removed 4 redundant places.
[2023-11-12 02:19:51,192 INFO L231 Difference]: Finished difference. Result has 19 places, 16 transitions, 46 flow
[2023-11-12 02:19:51,194 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=155, PETRI_DIFFERENCE_MINUEND_FLOW=34, PETRI_DIFFERENCE_MINUEND_PLACES=16, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=15, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=13, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=46, PETRI_PLACES=19, PETRI_TRANSITIONS=16}
[2023-11-12 02:19:51,199 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, -1 predicate places.
[2023-11-12 02:19:51,200 INFO L495 AbstractCegarLoop]: Abstraction has has 19 places, 16 transitions, 46 flow
[2023-11-12 02:19:51,201 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 77.33333333333333) internal successors, (232), 3 states have internal predecessors, (232), 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)
[2023-11-12 02:19:51,201 INFO L200 CegarLoopForPetriNet]: Found error trace
[2023-11-12 02:19:51,201 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2023-11-12 02:19:51,201 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0
[2023-11-12 02:19:51,202 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] ===
[2023-11-12 02:19:51,206 INFO L160 PredicateUnifier]: Initialized classic predicate unifier
[2023-11-12 02:19:51,206 INFO L85 PathProgramCache]: Analyzing trace with hash -787690244, now seen corresponding path program 1 times
[2023-11-12 02:19:51,206 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-12 02:19:51,207 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1965676402]
[2023-11-12 02:19:51,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-12 02:19:51,207 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-12 02:19:51,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-12 02:19:51,347 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked.
[2023-11-12 02:19:51,347 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-12 02:19:51,347 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1965676402]
[2023-11-12 02:19:51,348 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1965676402] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-12 02:19:51,348 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-12 02:19:51,348 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3
[2023-11-12 02:19:51,348 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [432084807]
[2023-11-12 02:19:51,348 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-12 02:19:51,350 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states
[2023-11-12 02:19:51,350 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-12 02:19:51,350 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2023-11-12 02:19:51,351 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12
[2023-11-12 02:19:51,386 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 69 out of 155
[2023-11-12 02:19:51,387 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 19 places, 16 transitions, 46 flow. Second operand has 4 states, 4 states have (on average 72.5) internal successors, (290), 4 states have internal predecessors, (290), 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)
[2023-11-12 02:19:51,387 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user.
[2023-11-12 02:19:51,388 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 69 of 155
[2023-11-12 02:19:51,388 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand
[2023-11-12 02:19:51,488 INFO L124 PetriNetUnfolderBase]: 87/157 cut-off events.
[2023-11-12 02:19:51,488 INFO L125 PetriNetUnfolderBase]: For 21/21 co-relation queries the response was YES.
[2023-11-12 02:19:51,489 INFO L83 FinitePrefix]: Finished finitePrefix Result has 356 conditions, 157 events. 87/157 cut-off events. For 21/21 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 419 event pairs, 46 based on Foata normal form. 0/143 useless extension candidates. Maximal degree in co-relation 164. Up to 124 conditions per place.
[2023-11-12 02:19:51,490 INFO L140 encePairwiseOnDemand]: 151/155 looper letters, 21 selfloop transitions, 3 changer transitions 0/24 dead transitions.
[2023-11-12 02:19:51,491 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 22 places, 24 transitions, 116 flow
[2023-11-12 02:19:51,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states.
[2023-11-12 02:19:51,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states.
[2023-11-12 02:19:51,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 299 transitions.
[2023-11-12 02:19:51,498 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.482258064516129
[2023-11-12 02:19:51,498 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 299 transitions.
[2023-11-12 02:19:51,498 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 299 transitions.
[2023-11-12 02:19:51,499 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic.
[2023-11-12 02:19:51,500 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 299 transitions.
[2023-11-12 02:19:51,503 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 74.75) internal successors, (299), 4 states have internal predecessors, (299), 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)
[2023-11-12 02:19:51,510 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 155.0) internal successors, (775), 5 states have internal predecessors, (775), 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)
[2023-11-12 02:19:51,511 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 155.0) internal successors, (775), 5 states have internal predecessors, (775), 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)
[2023-11-12 02:19:51,511 INFO L175 Difference]: Start difference. First operand has 19 places, 16 transitions, 46 flow. Second operand 4 states and 299 transitions.
[2023-11-12 02:19:51,511 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 22 places, 24 transitions, 116 flow
[2023-11-12 02:19:51,512 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 21 places, 24 transitions, 113 flow, removed 0 selfloop flow, removed 1 redundant places.
[2023-11-12 02:19:51,514 INFO L231 Difference]: Finished difference. Result has 22 places, 17 transitions, 58 flow
[2023-11-12 02:19:51,515 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=155, PETRI_DIFFERENCE_MINUEND_FLOW=44, PETRI_DIFFERENCE_MINUEND_PLACES=18, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=16, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=13, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=58, PETRI_PLACES=22, PETRI_TRANSITIONS=17}
[2023-11-12 02:19:51,516 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 2 predicate places.
[2023-11-12 02:19:51,516 INFO L495 AbstractCegarLoop]: Abstraction has has 22 places, 17 transitions, 58 flow
[2023-11-12 02:19:51,523 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 72.5) internal successors, (290), 4 states have internal predecessors, (290), 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)
[2023-11-12 02:19:51,524 INFO L200 CegarLoopForPetriNet]: Found error trace
[2023-11-12 02:19:51,524 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2023-11-12 02:19:51,524 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1
[2023-11-12 02:19:51,525 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] ===
[2023-11-12 02:19:51,527 INFO L160 PredicateUnifier]: Initialized classic predicate unifier
[2023-11-12 02:19:51,528 INFO L85 PathProgramCache]: Analyzing trace with hash -1620569891, now seen corresponding path program 1 times
[2023-11-12 02:19:51,528 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-12 02:19:51,529 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [140433949]
[2023-11-12 02:19:51,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-12 02:19:51,530 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-12 02:19:51,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-12 02:19:52,019 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-11-12 02:19:52,020 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-12 02:19:52,020 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [140433949]
[2023-11-12 02:19:52,020 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [140433949] provided 0 perfect and 1 imperfect interpolant sequences
[2023-11-12 02:19:52,020 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [954208705]
[2023-11-12 02:19:52,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-12 02:19:52,021 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-12 02:19:52,021 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0eaff618-de43-4165-89d4-83d22fe2c059/bin/uautomizer-verify-uTZkv6EMXl/z3
[2023-11-12 02:19:52,027 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0eaff618-de43-4165-89d4-83d22fe2c059/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-12 02:19:52,050 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0eaff618-de43-4165-89d4-83d22fe2c059/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process
[2023-11-12 02:19:52,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-12 02:19:52,120 INFO L262 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 6 conjunts are in the unsatisfiable core
[2023-11-12 02:19:52,125 INFO L285 TraceCheckSpWp]: Computing forward predicates...
[2023-11-12 02:19:52,257 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-11-12 02:19:52,257 INFO L327 TraceCheckSpWp]: Computing backward predicates...
[2023-11-12 02:19:52,471 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-11-12 02:19:52,476 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [954208705] provided 0 perfect and 2 imperfect interpolant sequences
[2023-11-12 02:19:52,476 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences.
[2023-11-12 02:19:52,476 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 3, 2] total 9
[2023-11-12 02:19:52,477 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [529220332]
[2023-11-12 02:19:52,477 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton
[2023-11-12 02:19:52,478 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states
[2023-11-12 02:19:52,479 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-12 02:19:52,479 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants.
[2023-11-12 02:19:52,480 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110
[2023-11-12 02:19:52,647 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 155
[2023-11-12 02:19:52,648 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 22 places, 17 transitions, 58 flow. Second operand has 11 states, 11 states have (on average 68.63636363636364) internal successors, (755), 11 states have internal predecessors, (755), 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)
[2023-11-12 02:19:52,649 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user.
[2023-11-12 02:19:52,649 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 155
[2023-11-12 02:19:52,649 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand
[2023-11-12 02:19:52,951 INFO L124 PetriNetUnfolderBase]: 187/339 cut-off events.
[2023-11-12 02:19:52,951 INFO L125 PetriNetUnfolderBase]: For 122/122 co-relation queries the response was YES.
[2023-11-12 02:19:52,953 INFO L83 FinitePrefix]: Finished finitePrefix Result has 902 conditions, 339 events. 187/339 cut-off events. For 122/122 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 1269 event pairs, 33 based on Foata normal form. 2/303 useless extension candidates. Maximal degree in co-relation 230. Up to 109 conditions per place.
[2023-11-12 02:19:52,956 INFO L140 encePairwiseOnDemand]: 149/155 looper letters, 49 selfloop transitions, 16 changer transitions 18/83 dead transitions.
[2023-11-12 02:19:52,956 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 31 places, 83 transitions, 427 flow
[2023-11-12 02:19:52,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states.
[2023-11-12 02:19:52,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states.
[2023-11-12 02:19:52,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 732 transitions.
[2023-11-12 02:19:52,960 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.472258064516129
[2023-11-12 02:19:52,960 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 732 transitions.
[2023-11-12 02:19:52,961 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 732 transitions.
[2023-11-12 02:19:52,961 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic.
[2023-11-12 02:19:52,962 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 732 transitions.
[2023-11-12 02:19:52,964 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 73.2) internal successors, (732), 10 states have internal predecessors, (732), 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)
[2023-11-12 02:19:52,968 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 155.0) internal successors, (1705), 11 states have internal predecessors, (1705), 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)
[2023-11-12 02:19:52,970 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 155.0) internal successors, (1705), 11 states have internal predecessors, (1705), 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)
[2023-11-12 02:19:52,970 INFO L175 Difference]: Start difference. First operand has 22 places, 17 transitions, 58 flow. Second operand 10 states and 732 transitions.
[2023-11-12 02:19:52,970 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 31 places, 83 transitions, 427 flow
[2023-11-12 02:19:52,972 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 29 places, 83 transitions, 407 flow, removed 5 selfloop flow, removed 2 redundant places.
[2023-11-12 02:19:52,974 INFO L231 Difference]: Finished difference. Result has 34 places, 32 transitions, 173 flow
[2023-11-12 02:19:52,974 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=155, PETRI_DIFFERENCE_MINUEND_FLOW=52, PETRI_DIFFERENCE_MINUEND_PLACES=20, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=17, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=10, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=173, PETRI_PLACES=34, PETRI_TRANSITIONS=32}
[2023-11-12 02:19:52,975 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 14 predicate places.
[2023-11-12 02:19:52,976 INFO L495 AbstractCegarLoop]: Abstraction has has 34 places, 32 transitions, 173 flow
[2023-11-12 02:19:52,977 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 68.63636363636364) internal successors, (755), 11 states have internal predecessors, (755), 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)
[2023-11-12 02:19:52,977 INFO L200 CegarLoopForPetriNet]: Found error trace
[2023-11-12 02:19:52,977 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2023-11-12 02:19:52,988 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0eaff618-de43-4165-89d4-83d22fe2c059/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0
[2023-11-12 02:19:53,183 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0eaff618-de43-4165-89d4-83d22fe2c059/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-12 02:19:53,183 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] ===
[2023-11-12 02:19:53,184 INFO L160 PredicateUnifier]: Initialized classic predicate unifier
[2023-11-12 02:19:53,184 INFO L85 PathProgramCache]: Analyzing trace with hash -34141795, now seen corresponding path program 2 times
[2023-11-12 02:19:53,184 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-12 02:19:53,184 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [535169048]
[2023-11-12 02:19:53,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-12 02:19:53,184 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-12 02:19:53,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-12 02:19:53,445 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked.
[2023-11-12 02:19:53,446 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-12 02:19:53,447 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [535169048]
[2023-11-12 02:19:53,447 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [535169048] provided 0 perfect and 1 imperfect interpolant sequences
[2023-11-12 02:19:53,447 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [234606924]
[2023-11-12 02:19:53,447 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1
[2023-11-12 02:19:53,448 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-12 02:19:53,448 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0eaff618-de43-4165-89d4-83d22fe2c059/bin/uautomizer-verify-uTZkv6EMXl/z3
[2023-11-12 02:19:53,451 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0eaff618-de43-4165-89d4-83d22fe2c059/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-12 02:19:53,468 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0eaff618-de43-4165-89d4-83d22fe2c059/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process
[2023-11-12 02:19:53,546 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s)
[2023-11-12 02:19:53,547 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat
[2023-11-12 02:19:53,548 INFO L262 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 10 conjunts are in the unsatisfiable core
[2023-11-12 02:19:53,550 INFO L285 TraceCheckSpWp]: Computing forward predicates...
[2023-11-12 02:19:53,637 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked.
[2023-11-12 02:19:53,638 INFO L327 TraceCheckSpWp]: Computing backward predicates...
[2023-11-12 02:19:53,907 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-11-12 02:19:53,907 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [234606924] provided 0 perfect and 2 imperfect interpolant sequences
[2023-11-12 02:19:53,907 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences.
[2023-11-12 02:19:53,907 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5, 6] total 13
[2023-11-12 02:19:53,907 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1156376067]
[2023-11-12 02:19:53,908 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton
[2023-11-12 02:19:53,908 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states
[2023-11-12 02:19:53,908 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-12 02:19:53,910 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants.
[2023-11-12 02:19:53,911 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182
[2023-11-12 02:19:54,029 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 155
[2023-11-12 02:19:54,031 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 32 transitions, 173 flow. Second operand has 14 states, 14 states have (on average 65.42857142857143) internal successors, (916), 14 states have internal predecessors, (916), 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)
[2023-11-12 02:19:54,031 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user.
[2023-11-12 02:19:54,031 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 155
[2023-11-12 02:19:54,031 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand
[2023-11-12 02:19:54,509 INFO L124 PetriNetUnfolderBase]: 210/369 cut-off events.
[2023-11-12 02:19:54,509 INFO L125 PetriNetUnfolderBase]: For 493/493 co-relation queries the response was YES.
[2023-11-12 02:19:54,511 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1205 conditions, 369 events. 210/369 cut-off events. For 493/493 co-relation queries the response was YES. Maximal size of possible extension queue 35. Compared 1342 event pairs, 12 based on Foata normal form. 32/401 useless extension candidates. Maximal degree in co-relation 1115. Up to 166 conditions per place.
[2023-11-12 02:19:54,513 INFO L140 encePairwiseOnDemand]: 148/155 looper letters, 54 selfloop transitions, 31 changer transitions 8/93 dead transitions.
[2023-11-12 02:19:54,514 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 93 transitions, 640 flow
[2023-11-12 02:19:54,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states.
[2023-11-12 02:19:54,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states.
[2023-11-12 02:19:54,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 885 transitions.
[2023-11-12 02:19:54,518 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4392059553349876
[2023-11-12 02:19:54,519 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 885 transitions.
[2023-11-12 02:19:54,519 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 885 transitions.
[2023-11-12 02:19:54,520 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic.
[2023-11-12 02:19:54,520 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 885 transitions.
[2023-11-12 02:19:54,524 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 68.07692307692308) internal successors, (885), 13 states have internal predecessors, (885), 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)
[2023-11-12 02:19:54,528 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 155.0) internal successors, (2170), 14 states have internal predecessors, (2170), 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)
[2023-11-12 02:19:54,530 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 155.0) internal successors, (2170), 14 states have internal predecessors, (2170), 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)
[2023-11-12 02:19:54,530 INFO L175 Difference]: Start difference. First operand has 34 places, 32 transitions, 173 flow. Second operand 13 states and 885 transitions.
[2023-11-12 02:19:54,530 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 93 transitions, 640 flow
[2023-11-12 02:19:54,537 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 93 transitions, 617 flow, removed 10 selfloop flow, removed 1 redundant places.
[2023-11-12 02:19:54,541 INFO L231 Difference]: Finished difference. Result has 52 places, 53 transitions, 392 flow
[2023-11-12 02:19:54,541 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=155, PETRI_DIFFERENCE_MINUEND_FLOW=157, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=392, PETRI_PLACES=52, PETRI_TRANSITIONS=53}
[2023-11-12 02:19:54,543 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 32 predicate places.
[2023-11-12 02:19:54,543 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 53 transitions, 392 flow
[2023-11-12 02:19:54,546 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 65.42857142857143) internal successors, (916), 14 states have internal predecessors, (916), 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)
[2023-11-12 02:19:54,546 INFO L200 CegarLoopForPetriNet]: Found error trace
[2023-11-12 02:19:54,546 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2023-11-12 02:19:54,554 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0eaff618-de43-4165-89d4-83d22fe2c059/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0
[2023-11-12 02:19:54,752 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0eaff618-de43-4165-89d4-83d22fe2c059/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-12 02:19:54,752 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] ===
[2023-11-12 02:19:54,753 INFO L160 PredicateUnifier]: Initialized classic predicate unifier
[2023-11-12 02:19:54,753 INFO L85 PathProgramCache]: Analyzing trace with hash -195801421, now seen corresponding path program 3 times
[2023-11-12 02:19:54,753 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-12 02:19:54,753 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1152936243]
[2023-11-12 02:19:54,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-12 02:19:54,753 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-12 02:19:54,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-12 02:19:55,006 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-11-12 02:19:55,007 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-12 02:19:55,007 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1152936243]
[2023-11-12 02:19:55,007 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1152936243] provided 0 perfect and 1 imperfect interpolant sequences
[2023-11-12 02:19:55,007 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [172406773]
[2023-11-12 02:19:55,007 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2
[2023-11-12 02:19:55,008 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-12 02:19:55,008 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0eaff618-de43-4165-89d4-83d22fe2c059/bin/uautomizer-verify-uTZkv6EMXl/z3
[2023-11-12 02:19:55,009 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0eaff618-de43-4165-89d4-83d22fe2c059/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-12 02:19:55,017 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0eaff618-de43-4165-89d4-83d22fe2c059/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process
[2023-11-12 02:19:55,105 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s)
[2023-11-12 02:19:55,105 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat
[2023-11-12 02:19:55,106 INFO L262 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 10 conjunts are in the unsatisfiable core
[2023-11-12 02:19:55,108 INFO L285 TraceCheckSpWp]: Computing forward predicates...
[2023-11-12 02:19:55,291 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-11-12 02:19:55,291 INFO L327 TraceCheckSpWp]: Computing backward predicates...
[2023-11-12 02:19:55,500 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-11-12 02:19:55,500 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [172406773] provided 0 perfect and 2 imperfect interpolant sequences
[2023-11-12 02:19:55,500 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences.
[2023-11-12 02:19:55,500 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 16
[2023-11-12 02:19:55,501 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [464394806]
[2023-11-12 02:19:55,501 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton
[2023-11-12 02:19:55,501 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states
[2023-11-12 02:19:55,502 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-12 02:19:55,502 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants.
[2023-11-12 02:19:55,503 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240
[2023-11-12 02:19:55,645 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 155
[2023-11-12 02:19:55,647 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 53 transitions, 392 flow. Second operand has 16 states, 16 states have (on average 65.25) internal successors, (1044), 16 states have internal predecessors, (1044), 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)
[2023-11-12 02:19:55,647 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user.
[2023-11-12 02:19:55,647 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 155
[2023-11-12 02:19:55,647 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand
[2023-11-12 02:19:56,402 INFO L124 PetriNetUnfolderBase]: 305/521 cut-off events.
[2023-11-12 02:19:56,403 INFO L125 PetriNetUnfolderBase]: For 2282/2282 co-relation queries the response was YES.
[2023-11-12 02:19:56,405 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2402 conditions, 521 events. 305/521 cut-off events. For 2282/2282 co-relation queries the response was YES. Maximal size of possible extension queue 50. Compared 2075 event pairs, 6 based on Foata normal form. 18/539 useless extension candidates. Maximal degree in co-relation 2314. Up to 165 conditions per place.
[2023-11-12 02:19:56,410 INFO L140 encePairwiseOnDemand]: 148/155 looper letters, 68 selfloop transitions, 67 changer transitions 19/154 dead transitions.
[2023-11-12 02:19:56,410 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 154 transitions, 1342 flow
[2023-11-12 02:19:56,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states.
[2023-11-12 02:19:56,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states.
[2023-11-12 02:19:56,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 1494 transitions.
[2023-11-12 02:19:56,417 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4381231671554252
[2023-11-12 02:19:56,417 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 1494 transitions.
[2023-11-12 02:19:56,418 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 1494 transitions.
[2023-11-12 02:19:56,419 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic.
[2023-11-12 02:19:56,419 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 1494 transitions.
[2023-11-12 02:19:56,424 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 67.9090909090909) internal successors, (1494), 22 states have internal predecessors, (1494), 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)
[2023-11-12 02:19:56,431 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 155.0) internal successors, (3565), 23 states have internal predecessors, (3565), 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)
[2023-11-12 02:19:56,433 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 155.0) internal successors, (3565), 23 states have internal predecessors, (3565), 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)
[2023-11-12 02:19:56,433 INFO L175 Difference]: Start difference. First operand has 52 places, 53 transitions, 392 flow. Second operand 22 states and 1494 transitions.
[2023-11-12 02:19:56,433 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 154 transitions, 1342 flow
[2023-11-12 02:19:56,444 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 154 transitions, 1259 flow, removed 40 selfloop flow, removed 1 redundant places.
[2023-11-12 02:19:56,447 INFO L231 Difference]: Finished difference. Result has 79 places, 89 transitions, 846 flow
[2023-11-12 02:19:56,448 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=155, PETRI_DIFFERENCE_MINUEND_FLOW=351, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=846, PETRI_PLACES=79, PETRI_TRANSITIONS=89}
[2023-11-12 02:19:56,448 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 59 predicate places.
[2023-11-12 02:19:56,449 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 89 transitions, 846 flow
[2023-11-12 02:19:56,449 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 65.25) internal successors, (1044), 16 states have internal predecessors, (1044), 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)
[2023-11-12 02:19:56,450 INFO L200 CegarLoopForPetriNet]: Found error trace
[2023-11-12 02:19:56,450 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2023-11-12 02:19:56,465 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0eaff618-de43-4165-89d4-83d22fe2c059/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0
[2023-11-12 02:19:56,655 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0eaff618-de43-4165-89d4-83d22fe2c059/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-12 02:19:56,656 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] ===
[2023-11-12 02:19:56,656 INFO L160 PredicateUnifier]: Initialized classic predicate unifier
[2023-11-12 02:19:56,657 INFO L85 PathProgramCache]: Analyzing trace with hash -1193729427, now seen corresponding path program 4 times
[2023-11-12 02:19:56,657 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-12 02:19:56,657 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [792358348]
[2023-11-12 02:19:56,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-12 02:19:56,657 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-12 02:19:56,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-12 02:19:56,908 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-11-12 02:19:56,909 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-12 02:19:56,909 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [792358348]
[2023-11-12 02:19:56,909 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [792358348] provided 0 perfect and 1 imperfect interpolant sequences
[2023-11-12 02:19:56,909 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1822820682]
[2023-11-12 02:19:56,909 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST
[2023-11-12 02:19:56,910 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-12 02:19:56,910 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0eaff618-de43-4165-89d4-83d22fe2c059/bin/uautomizer-verify-uTZkv6EMXl/z3
[2023-11-12 02:19:56,924 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0eaff618-de43-4165-89d4-83d22fe2c059/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-12 02:19:56,940 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0eaff618-de43-4165-89d4-83d22fe2c059/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process
[2023-11-12 02:19:56,998 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s)
[2023-11-12 02:19:56,999 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat
[2023-11-12 02:19:57,000 INFO L262 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 10 conjunts are in the unsatisfiable core
[2023-11-12 02:19:57,002 INFO L285 TraceCheckSpWp]: Computing forward predicates...
[2023-11-12 02:19:57,133 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-11-12 02:19:57,133 INFO L327 TraceCheckSpWp]: Computing backward predicates...
[2023-11-12 02:19:57,349 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-11-12 02:19:57,350 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1822820682] provided 0 perfect and 2 imperfect interpolant sequences
[2023-11-12 02:19:57,350 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences.
[2023-11-12 02:19:57,350 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 18
[2023-11-12 02:19:57,350 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [474414150]
[2023-11-12 02:19:57,350 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton
[2023-11-12 02:19:57,351 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states
[2023-11-12 02:19:57,351 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-12 02:19:57,352 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants.
[2023-11-12 02:19:57,352 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=239, Unknown=0, NotChecked=0, Total=306
[2023-11-12 02:19:57,535 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 155
[2023-11-12 02:19:57,536 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 89 transitions, 846 flow. Second operand has 18 states, 18 states have (on average 65.11111111111111) internal successors, (1172), 18 states have internal predecessors, (1172), 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)
[2023-11-12 02:19:57,537 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user.
[2023-11-12 02:19:57,537 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 155
[2023-11-12 02:19:57,537 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand
[2023-11-12 02:19:58,619 INFO L124 PetriNetUnfolderBase]: 316/530 cut-off events.
[2023-11-12 02:19:58,619 INFO L125 PetriNetUnfolderBase]: For 5900/5900 co-relation queries the response was YES.
[2023-11-12 02:19:58,624 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3141 conditions, 530 events. 316/530 cut-off events. For 5900/5900 co-relation queries the response was YES. Maximal size of possible extension queue 47. Compared 2036 event pairs, 4 based on Foata normal form. 22/552 useless extension candidates. Maximal degree in co-relation 3084. Up to 183 conditions per place.
[2023-11-12 02:19:58,630 INFO L140 encePairwiseOnDemand]: 148/155 looper letters, 85 selfloop transitions, 82 changer transitions 2/169 dead transitions.
[2023-11-12 02:19:58,630 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 169 transitions, 1879 flow
[2023-11-12 02:19:58,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states.
[2023-11-12 02:19:58,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states.
[2023-11-12 02:19:58,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 1692 transitions.
[2023-11-12 02:19:58,638 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4366451612903226
[2023-11-12 02:19:58,638 INFO L72 ComplementDD]: Start complementDD. Operand 25 states and 1692 transitions.
[2023-11-12 02:19:58,638 INFO L73 IsDeterministic]: Start isDeterministic. Operand 25 states and 1692 transitions.
[2023-11-12 02:19:58,640 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic.
[2023-11-12 02:19:58,640 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 25 states and 1692 transitions.
[2023-11-12 02:19:58,645 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 26 states, 25 states have (on average 67.68) internal successors, (1692), 25 states have internal predecessors, (1692), 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)
[2023-11-12 02:19:58,654 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 26 states, 26 states have (on average 155.0) internal successors, (4030), 26 states have internal predecessors, (4030), 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)
[2023-11-12 02:19:58,655 INFO L81 ComplementDD]: Finished complementDD. Result has 26 states, 26 states have (on average 155.0) internal successors, (4030), 26 states have internal predecessors, (4030), 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)
[2023-11-12 02:19:58,656 INFO L175 Difference]: Start difference. First operand has 79 places, 89 transitions, 846 flow. Second operand 25 states and 1692 transitions.
[2023-11-12 02:19:58,656 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 169 transitions, 1879 flow
[2023-11-12 02:19:58,682 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 169 transitions, 1671 flow, removed 97 selfloop flow, removed 6 redundant places.
[2023-11-12 02:19:58,688 INFO L231 Difference]: Finished difference. Result has 103 places, 114 transitions, 1329 flow
[2023-11-12 02:19:58,689 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=155, PETRI_DIFFERENCE_MINUEND_FLOW=700, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=89, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=1329, PETRI_PLACES=103, PETRI_TRANSITIONS=114}
[2023-11-12 02:19:58,693 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 83 predicate places.
[2023-11-12 02:19:58,693 INFO L495 AbstractCegarLoop]: Abstraction has has 103 places, 114 transitions, 1329 flow
[2023-11-12 02:19:58,694 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 65.11111111111111) internal successors, (1172), 18 states have internal predecessors, (1172), 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)
[2023-11-12 02:19:58,694 INFO L200 CegarLoopForPetriNet]: Found error trace
[2023-11-12 02:19:58,694 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2023-11-12 02:19:58,706 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0eaff618-de43-4165-89d4-83d22fe2c059/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0
[2023-11-12 02:19:58,899 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0eaff618-de43-4165-89d4-83d22fe2c059/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-12 02:19:58,899 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] ===
[2023-11-12 02:19:58,900 INFO L160 PredicateUnifier]: Initialized classic predicate unifier
[2023-11-12 02:19:58,900 INFO L85 PathProgramCache]: Analyzing trace with hash -227818617, now seen corresponding path program 5 times
[2023-11-12 02:19:58,900 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-12 02:19:58,900 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [751924103]
[2023-11-12 02:19:58,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-12 02:19:58,900 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-12 02:19:58,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-12 02:19:59,241 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-11-12 02:19:59,242 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-12 02:19:59,242 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [751924103]
[2023-11-12 02:19:59,242 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [751924103] provided 0 perfect and 1 imperfect interpolant sequences
[2023-11-12 02:19:59,242 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [434583808]
[2023-11-12 02:19:59,242 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1
[2023-11-12 02:19:59,243 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-12 02:19:59,243 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0eaff618-de43-4165-89d4-83d22fe2c059/bin/uautomizer-verify-uTZkv6EMXl/z3
[2023-11-12 02:19:59,244 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0eaff618-de43-4165-89d4-83d22fe2c059/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-12 02:19:59,267 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0eaff618-de43-4165-89d4-83d22fe2c059/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process
[2023-11-12 02:19:59,316 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s)
[2023-11-12 02:19:59,316 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat
[2023-11-12 02:19:59,319 INFO L262 TraceCheckSpWp]: Trace formula consists of 25 conjuncts, 9 conjunts are in the unsatisfiable core
[2023-11-12 02:19:59,322 INFO L285 TraceCheckSpWp]: Computing forward predicates...
[2023-11-12 02:19:59,457 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-11-12 02:19:59,457 INFO L327 TraceCheckSpWp]: Computing backward predicates...
[2023-11-12 02:19:59,664 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-11-12 02:19:59,665 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [434583808] provided 0 perfect and 2 imperfect interpolant sequences
[2023-11-12 02:19:59,665 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences.
[2023-11-12 02:19:59,665 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 15
[2023-11-12 02:19:59,665 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [547371045]
[2023-11-12 02:19:59,665 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton
[2023-11-12 02:19:59,667 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states
[2023-11-12 02:19:59,669 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-12 02:19:59,670 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants.
[2023-11-12 02:19:59,670 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210
[2023-11-12 02:19:59,802 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 155
[2023-11-12 02:19:59,804 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 114 transitions, 1329 flow. Second operand has 15 states, 15 states have (on average 66.8) internal successors, (1002), 15 states have internal predecessors, (1002), 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)
[2023-11-12 02:19:59,804 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user.
[2023-11-12 02:19:59,804 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 155
[2023-11-12 02:19:59,804 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand
[2023-11-12 02:20:00,942 INFO L124 PetriNetUnfolderBase]: 420/752 cut-off events.
[2023-11-12 02:20:00,942 INFO L125 PetriNetUnfolderBase]: For 15057/15057 co-relation queries the response was YES.
[2023-11-12 02:20:00,947 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4927 conditions, 752 events. 420/752 cut-off events. For 15057/15057 co-relation queries the response was YES. Maximal size of possible extension queue 59. Compared 3420 event pairs, 16 based on Foata normal form. 24/776 useless extension candidates. Maximal degree in co-relation 3964. Up to 247 conditions per place.
[2023-11-12 02:20:00,956 INFO L140 encePairwiseOnDemand]: 149/155 looper letters, 112 selfloop transitions, 110 changer transitions 6/228 dead transitions.
[2023-11-12 02:20:00,956 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 125 places, 228 transitions, 2782 flow
[2023-11-12 02:20:00,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states.
[2023-11-12 02:20:00,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states.
[2023-11-12 02:20:00,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 1605 transitions.
[2023-11-12 02:20:00,963 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45021037868162694
[2023-11-12 02:20:00,963 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 1605 transitions.
[2023-11-12 02:20:00,964 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 1605 transitions.
[2023-11-12 02:20:00,965 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic.
[2023-11-12 02:20:00,965 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 1605 transitions.
[2023-11-12 02:20:00,970 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 24 states, 23 states have (on average 69.78260869565217) internal successors, (1605), 23 states have internal predecessors, (1605), 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)
[2023-11-12 02:20:00,977 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 24 states, 24 states have (on average 155.0) internal successors, (3720), 24 states have internal predecessors, (3720), 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)
[2023-11-12 02:20:00,979 INFO L81 ComplementDD]: Finished complementDD. Result has 24 states, 24 states have (on average 155.0) internal successors, (3720), 24 states have internal predecessors, (3720), 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)
[2023-11-12 02:20:00,979 INFO L175 Difference]: Start difference. First operand has 103 places, 114 transitions, 1329 flow. Second operand 23 states and 1605 transitions.
[2023-11-12 02:20:00,979 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 125 places, 228 transitions, 2782 flow
[2023-11-12 02:20:01,029 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 114 places, 228 transitions, 2351 flow, removed 185 selfloop flow, removed 11 redundant places.
[2023-11-12 02:20:01,034 INFO L231 Difference]: Finished difference. Result has 121 places, 155 transitions, 1891 flow
[2023-11-12 02:20:01,035 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=155, PETRI_DIFFERENCE_MINUEND_FLOW=1029, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=114, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=72, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=1891, PETRI_PLACES=121, PETRI_TRANSITIONS=155}
[2023-11-12 02:20:01,036 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 101 predicate places.
[2023-11-12 02:20:01,036 INFO L495 AbstractCegarLoop]: Abstraction has has 121 places, 155 transitions, 1891 flow
[2023-11-12 02:20:01,037 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 66.8) internal successors, (1002), 15 states have internal predecessors, (1002), 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)
[2023-11-12 02:20:01,037 INFO L200 CegarLoopForPetriNet]: Found error trace
[2023-11-12 02:20:01,037 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2023-11-12 02:20:01,048 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0eaff618-de43-4165-89d4-83d22fe2c059/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0
[2023-11-12 02:20:01,242 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0eaff618-de43-4165-89d4-83d22fe2c059/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-12 02:20:01,243 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] ===
[2023-11-12 02:20:01,243 INFO L160 PredicateUnifier]: Initialized classic predicate unifier
[2023-11-12 02:20:01,243 INFO L85 PathProgramCache]: Analyzing trace with hash 1577434221, now seen corresponding path program 6 times
[2023-11-12 02:20:01,244 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-12 02:20:01,244 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [916947145]
[2023-11-12 02:20:01,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-12 02:20:01,244 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-12 02:20:01,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-12 02:20:01,476 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-11-12 02:20:01,476 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-12 02:20:01,476 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [916947145]
[2023-11-12 02:20:01,476 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [916947145] provided 0 perfect and 1 imperfect interpolant sequences
[2023-11-12 02:20:01,477 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [392761987]
[2023-11-12 02:20:01,477 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE
[2023-11-12 02:20:01,477 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-12 02:20:01,477 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0eaff618-de43-4165-89d4-83d22fe2c059/bin/uautomizer-verify-uTZkv6EMXl/z3
[2023-11-12 02:20:01,478 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0eaff618-de43-4165-89d4-83d22fe2c059/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-12 02:20:01,503 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0eaff618-de43-4165-89d4-83d22fe2c059/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process
[2023-11-12 02:20:01,565 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s)
[2023-11-12 02:20:01,566 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat
[2023-11-12 02:20:01,567 INFO L262 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 10 conjunts are in the unsatisfiable core
[2023-11-12 02:20:01,568 INFO L285 TraceCheckSpWp]: Computing forward predicates...
[2023-11-12 02:20:01,673 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-11-12 02:20:01,673 INFO L327 TraceCheckSpWp]: Computing backward predicates...
[2023-11-12 02:20:01,969 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-11-12 02:20:01,970 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [392761987] provided 0 perfect and 2 imperfect interpolant sequences
[2023-11-12 02:20:01,970 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences.
[2023-11-12 02:20:01,970 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 13
[2023-11-12 02:20:01,970 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1841394281]
[2023-11-12 02:20:01,970 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton
[2023-11-12 02:20:01,971 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states
[2023-11-12 02:20:01,971 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-12 02:20:01,971 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants.
[2023-11-12 02:20:01,971 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156
[2023-11-12 02:20:02,079 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 155
[2023-11-12 02:20:02,080 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 121 places, 155 transitions, 1891 flow. Second operand has 13 states, 13 states have (on average 66.92307692307692) internal successors, (870), 13 states have internal predecessors, (870), 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)
[2023-11-12 02:20:02,081 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user.
[2023-11-12 02:20:02,081 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 155
[2023-11-12 02:20:02,081 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand
[2023-11-12 02:20:02,844 INFO L124 PetriNetUnfolderBase]: 482/863 cut-off events.
[2023-11-12 02:20:02,844 INFO L125 PetriNetUnfolderBase]: For 15085/15085 co-relation queries the response was YES.
[2023-11-12 02:20:02,851 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5700 conditions, 863 events. 482/863 cut-off events. For 15085/15085 co-relation queries the response was YES. Maximal size of possible extension queue 68. Compared 4012 event pairs, 103 based on Foata normal form. 26/889 useless extension candidates. Maximal degree in co-relation 5368. Up to 635 conditions per place.
[2023-11-12 02:20:02,861 INFO L140 encePairwiseOnDemand]: 149/155 looper letters, 136 selfloop transitions, 81 changer transitions 6/223 dead transitions.
[2023-11-12 02:20:02,861 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 135 places, 223 transitions, 2998 flow
[2023-11-12 02:20:02,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states.
[2023-11-12 02:20:02,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states.
[2023-11-12 02:20:02,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 1048 transitions.
[2023-11-12 02:20:02,869 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.450752688172043
[2023-11-12 02:20:02,869 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 1048 transitions.
[2023-11-12 02:20:02,869 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 1048 transitions.
[2023-11-12 02:20:02,870 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic.
[2023-11-12 02:20:02,871 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 1048 transitions.
[2023-11-12 02:20:02,875 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 69.86666666666666) internal successors, (1048), 15 states have internal predecessors, (1048), 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)
[2023-11-12 02:20:02,880 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 155.0) internal successors, (2480), 16 states have internal predecessors, (2480), 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)
[2023-11-12 02:20:02,881 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 155.0) internal successors, (2480), 16 states have internal predecessors, (2480), 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)
[2023-11-12 02:20:02,881 INFO L175 Difference]: Start difference. First operand has 121 places, 155 transitions, 1891 flow. Second operand 15 states and 1048 transitions.
[2023-11-12 02:20:02,881 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 135 places, 223 transitions, 2998 flow
[2023-11-12 02:20:02,951 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 128 places, 223 transitions, 2682 flow, removed 136 selfloop flow, removed 7 redundant places.
[2023-11-12 02:20:02,957 INFO L231 Difference]: Finished difference. Result has 135 places, 183 transitions, 2312 flow
[2023-11-12 02:20:02,958 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=155, PETRI_DIFFERENCE_MINUEND_FLOW=1605, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=155, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=83, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=2312, PETRI_PLACES=135, PETRI_TRANSITIONS=183}
[2023-11-12 02:20:02,961 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 115 predicate places.
[2023-11-12 02:20:02,961 INFO L495 AbstractCegarLoop]: Abstraction has has 135 places, 183 transitions, 2312 flow
[2023-11-12 02:20:02,962 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 66.92307692307692) internal successors, (870), 13 states have internal predecessors, (870), 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)
[2023-11-12 02:20:02,962 INFO L200 CegarLoopForPetriNet]: Found error trace
[2023-11-12 02:20:02,962 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2023-11-12 02:20:02,976 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0eaff618-de43-4165-89d4-83d22fe2c059/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0
[2023-11-12 02:20:03,171 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0eaff618-de43-4165-89d4-83d22fe2c059/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-12 02:20:03,171 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] ===
[2023-11-12 02:20:03,171 INFO L160 PredicateUnifier]: Initialized classic predicate unifier
[2023-11-12 02:20:03,172 INFO L85 PathProgramCache]: Analyzing trace with hash 2095872793, now seen corresponding path program 7 times
[2023-11-12 02:20:03,172 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-12 02:20:03,172 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1354119830]
[2023-11-12 02:20:03,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-12 02:20:03,172 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-12 02:20:03,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-12 02:20:03,436 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-11-12 02:20:03,437 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-12 02:20:03,437 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1354119830]
[2023-11-12 02:20:03,437 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1354119830] provided 0 perfect and 1 imperfect interpolant sequences
[2023-11-12 02:20:03,437 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [851846760]
[2023-11-12 02:20:03,437 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY
[2023-11-12 02:20:03,438 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-12 02:20:03,438 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0eaff618-de43-4165-89d4-83d22fe2c059/bin/uautomizer-verify-uTZkv6EMXl/z3
[2023-11-12 02:20:03,439 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0eaff618-de43-4165-89d4-83d22fe2c059/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-12 02:20:03,470 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0eaff618-de43-4165-89d4-83d22fe2c059/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process
[2023-11-12 02:20:03,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-12 02:20:03,524 INFO L262 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 10 conjunts are in the unsatisfiable core
[2023-11-12 02:20:03,526 INFO L285 TraceCheckSpWp]: Computing forward predicates...
[2023-11-12 02:20:03,672 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-11-12 02:20:03,672 INFO L327 TraceCheckSpWp]: Computing backward predicates...
[2023-11-12 02:20:03,897 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-11-12 02:20:03,898 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [851846760] provided 0 perfect and 2 imperfect interpolant sequences
[2023-11-12 02:20:03,898 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences.
[2023-11-12 02:20:03,898 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15
[2023-11-12 02:20:03,900 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1255607232]
[2023-11-12 02:20:03,900 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton
[2023-11-12 02:20:03,901 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states
[2023-11-12 02:20:03,901 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-12 02:20:03,902 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants.
[2023-11-12 02:20:03,903 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210
[2023-11-12 02:20:04,131 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 155
[2023-11-12 02:20:04,132 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 135 places, 183 transitions, 2312 flow. Second operand has 15 states, 15 states have (on average 65.4) internal successors, (981), 15 states have internal predecessors, (981), 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)
[2023-11-12 02:20:04,133 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user.
[2023-11-12 02:20:04,133 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 155
[2023-11-12 02:20:04,133 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand
[2023-11-12 02:20:05,225 INFO L124 PetriNetUnfolderBase]: 596/1073 cut-off events.
[2023-11-12 02:20:05,225 INFO L125 PetriNetUnfolderBase]: For 13000/13000 co-relation queries the response was YES.
[2023-11-12 02:20:05,231 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7264 conditions, 1073 events. 596/1073 cut-off events. For 13000/13000 co-relation queries the response was YES. Maximal size of possible extension queue 82. Compared 5338 event pairs, 32 based on Foata normal form. 30/1103 useless extension candidates. Maximal degree in co-relation 6575. Up to 717 conditions per place.
[2023-11-12 02:20:05,243 INFO L140 encePairwiseOnDemand]: 147/155 looper letters, 192 selfloop transitions, 98 changer transitions 8/298 dead transitions.
[2023-11-12 02:20:05,243 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 155 places, 298 transitions, 4157 flow
[2023-11-12 02:20:05,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states.
[2023-11-12 02:20:05,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states.
[2023-11-12 02:20:05,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 1512 transitions.
[2023-11-12 02:20:05,248 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4434017595307918
[2023-11-12 02:20:05,248 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 1512 transitions.
[2023-11-12 02:20:05,249 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 1512 transitions.
[2023-11-12 02:20:05,251 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic.
[2023-11-12 02:20:05,251 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 1512 transitions.
[2023-11-12 02:20:05,260 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 68.72727272727273) internal successors, (1512), 22 states have internal predecessors, (1512), 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)
[2023-11-12 02:20:05,267 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 155.0) internal successors, (3565), 23 states have internal predecessors, (3565), 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)
[2023-11-12 02:20:05,269 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 155.0) internal successors, (3565), 23 states have internal predecessors, (3565), 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)
[2023-11-12 02:20:05,269 INFO L175 Difference]: Start difference. First operand has 135 places, 183 transitions, 2312 flow. Second operand 22 states and 1512 transitions.
[2023-11-12 02:20:05,269 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 155 places, 298 transitions, 4157 flow
[2023-11-12 02:20:05,345 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 151 places, 298 transitions, 3923 flow, removed 99 selfloop flow, removed 4 redundant places.
[2023-11-12 02:20:05,357 INFO L231 Difference]: Finished difference. Result has 168 places, 233 transitions, 3341 flow
[2023-11-12 02:20:05,358 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=155, PETRI_DIFFERENCE_MINUEND_FLOW=2084, PETRI_DIFFERENCE_MINUEND_PLACES=130, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=180, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=108, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=3341, PETRI_PLACES=168, PETRI_TRANSITIONS=233}
[2023-11-12 02:20:05,359 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 148 predicate places.
[2023-11-12 02:20:05,359 INFO L495 AbstractCegarLoop]: Abstraction has has 168 places, 233 transitions, 3341 flow
[2023-11-12 02:20:05,360 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 65.4) internal successors, (981), 15 states have internal predecessors, (981), 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)
[2023-11-12 02:20:05,360 INFO L200 CegarLoopForPetriNet]: Found error trace
[2023-11-12 02:20:05,360 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2023-11-12 02:20:05,372 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0eaff618-de43-4165-89d4-83d22fe2c059/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0
[2023-11-12 02:20:05,566 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0eaff618-de43-4165-89d4-83d22fe2c059/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-12 02:20:05,567 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] ===
[2023-11-12 02:20:05,567 INFO L160 PredicateUnifier]: Initialized classic predicate unifier
[2023-11-12 02:20:05,567 INFO L85 PathProgramCache]: Analyzing trace with hash 1472097317, now seen corresponding path program 8 times
[2023-11-12 02:20:05,567 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-12 02:20:05,567 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [975295363]
[2023-11-12 02:20:05,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-12 02:20:05,568 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-12 02:20:05,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-12 02:20:05,848 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-11-12 02:20:05,848 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-12 02:20:05,849 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [975295363]
[2023-11-12 02:20:05,849 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [975295363] provided 0 perfect and 1 imperfect interpolant sequences
[2023-11-12 02:20:05,849 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [230349072]
[2023-11-12 02:20:05,849 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1
[2023-11-12 02:20:05,849 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-12 02:20:05,849 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0eaff618-de43-4165-89d4-83d22fe2c059/bin/uautomizer-verify-uTZkv6EMXl/z3
[2023-11-12 02:20:05,850 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0eaff618-de43-4165-89d4-83d22fe2c059/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-12 02:20:05,883 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0eaff618-de43-4165-89d4-83d22fe2c059/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process
[2023-11-12 02:20:05,939 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s)
[2023-11-12 02:20:05,940 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat
[2023-11-12 02:20:05,941 INFO L262 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 10 conjunts are in the unsatisfiable core
[2023-11-12 02:20:05,942 INFO L285 TraceCheckSpWp]: Computing forward predicates...
[2023-11-12 02:20:06,081 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-11-12 02:20:06,081 INFO L327 TraceCheckSpWp]: Computing backward predicates...
[2023-11-12 02:20:06,311 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-11-12 02:20:06,311 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [230349072] provided 0 perfect and 2 imperfect interpolant sequences
[2023-11-12 02:20:06,311 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences.
[2023-11-12 02:20:06,311 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15
[2023-11-12 02:20:06,312 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [647365369]
[2023-11-12 02:20:06,312 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton
[2023-11-12 02:20:06,312 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states
[2023-11-12 02:20:06,313 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-12 02:20:06,313 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants.
[2023-11-12 02:20:06,313 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210
[2023-11-12 02:20:06,455 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 155
[2023-11-12 02:20:06,457 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 168 places, 233 transitions, 3341 flow. Second operand has 15 states, 15 states have (on average 67.13333333333334) internal successors, (1007), 15 states have internal predecessors, (1007), 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)
[2023-11-12 02:20:06,457 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user.
[2023-11-12 02:20:06,457 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 155
[2023-11-12 02:20:06,457 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand
[2023-11-12 02:20:07,609 INFO L124 PetriNetUnfolderBase]: 717/1287 cut-off events.
[2023-11-12 02:20:07,610 INFO L125 PetriNetUnfolderBase]: For 22779/22779 co-relation queries the response was YES.
[2023-11-12 02:20:07,619 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9570 conditions, 1287 events. 717/1287 cut-off events. For 22779/22779 co-relation queries the response was YES. Maximal size of possible extension queue 107. Compared 6705 event pairs, 145 based on Foata normal form. 28/1315 useless extension candidates. Maximal degree in co-relation 9358. Up to 922 conditions per place.
[2023-11-12 02:20:07,634 INFO L140 encePairwiseOnDemand]: 149/155 looper letters, 224 selfloop transitions, 111 changer transitions 6/341 dead transitions.
[2023-11-12 02:20:07,634 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 190 places, 341 transitions, 5297 flow
[2023-11-12 02:20:07,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states.
[2023-11-12 02:20:07,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states.
[2023-11-12 02:20:07,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 1610 transitions.
[2023-11-12 02:20:07,638 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45161290322580644
[2023-11-12 02:20:07,639 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 1610 transitions.
[2023-11-12 02:20:07,639 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 1610 transitions.
[2023-11-12 02:20:07,640 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic.
[2023-11-12 02:20:07,640 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 1610 transitions.
[2023-11-12 02:20:07,643 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 24 states, 23 states have (on average 70.0) internal successors, (1610), 23 states have internal predecessors, (1610), 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)
[2023-11-12 02:20:07,650 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 24 states, 24 states have (on average 155.0) internal successors, (3720), 24 states have internal predecessors, (3720), 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)
[2023-11-12 02:20:07,651 INFO L81 ComplementDD]: Finished complementDD. Result has 24 states, 24 states have (on average 155.0) internal successors, (3720), 24 states have internal predecessors, (3720), 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)
[2023-11-12 02:20:07,652 INFO L175 Difference]: Start difference. First operand has 168 places, 233 transitions, 3341 flow. Second operand 23 states and 1610 transitions.
[2023-11-12 02:20:07,652 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 190 places, 341 transitions, 5297 flow
[2023-11-12 02:20:07,812 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 190 places, 341 transitions, 4835 flow, removed 231 selfloop flow, removed 0 redundant places.
[2023-11-12 02:20:07,821 INFO L231 Difference]: Finished difference. Result has 206 places, 279 transitions, 4054 flow
[2023-11-12 02:20:07,822 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=155, PETRI_DIFFERENCE_MINUEND_FLOW=2945, PETRI_DIFFERENCE_MINUEND_PLACES=168, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=233, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=140, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=4054, PETRI_PLACES=206, PETRI_TRANSITIONS=279}
[2023-11-12 02:20:07,823 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 186 predicate places.
[2023-11-12 02:20:07,823 INFO L495 AbstractCegarLoop]: Abstraction has has 206 places, 279 transitions, 4054 flow
[2023-11-12 02:20:07,824 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 67.13333333333334) internal successors, (1007), 15 states have internal predecessors, (1007), 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)
[2023-11-12 02:20:07,824 INFO L200 CegarLoopForPetriNet]: Found error trace
[2023-11-12 02:20:07,824 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2023-11-12 02:20:07,834 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0eaff618-de43-4165-89d4-83d22fe2c059/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0
[2023-11-12 02:20:08,034 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0eaff618-de43-4165-89d4-83d22fe2c059/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-12 02:20:08,034 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] ===
[2023-11-12 02:20:08,035 INFO L160 PredicateUnifier]: Initialized classic predicate unifier
[2023-11-12 02:20:08,035 INFO L85 PathProgramCache]: Analyzing trace with hash -513506286, now seen corresponding path program 9 times
[2023-11-12 02:20:08,035 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-12 02:20:08,035 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2105235770]
[2023-11-12 02:20:08,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-12 02:20:08,035 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-12 02:20:08,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-12 02:20:08,571 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-11-12 02:20:08,571 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-12 02:20:08,571 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2105235770]
[2023-11-12 02:20:08,572 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2105235770] provided 0 perfect and 1 imperfect interpolant sequences
[2023-11-12 02:20:08,572 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [483917261]
[2023-11-12 02:20:08,572 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2
[2023-11-12 02:20:08,572 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-12 02:20:08,572 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0eaff618-de43-4165-89d4-83d22fe2c059/bin/uautomizer-verify-uTZkv6EMXl/z3
[2023-11-12 02:20:08,573 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0eaff618-de43-4165-89d4-83d22fe2c059/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-12 02:20:08,595 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0eaff618-de43-4165-89d4-83d22fe2c059/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process
[2023-11-12 02:20:08,682 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s)
[2023-11-12 02:20:08,682 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat
[2023-11-12 02:20:08,683 INFO L262 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 12 conjunts are in the unsatisfiable core
[2023-11-12 02:20:08,685 INFO L285 TraceCheckSpWp]: Computing forward predicates...
[2023-11-12 02:20:08,942 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-11-12 02:20:08,943 INFO L327 TraceCheckSpWp]: Computing backward predicates...
[2023-11-12 02:20:11,644 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-11-12 02:20:11,645 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [483917261] provided 0 perfect and 2 imperfect interpolant sequences
[2023-11-12 02:20:11,645 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences.
[2023-11-12 02:20:11,645 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 5] total 17
[2023-11-12 02:20:11,645 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1623096265]
[2023-11-12 02:20:11,645 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton
[2023-11-12 02:20:11,646 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states
[2023-11-12 02:20:11,646 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-12 02:20:11,647 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants.
[2023-11-12 02:20:11,647 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=252, Unknown=0, NotChecked=0, Total=342
[2023-11-12 02:20:13,074 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 155
[2023-11-12 02:20:13,076 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 206 places, 279 transitions, 4054 flow. Second operand has 19 states, 19 states have (on average 64.36842105263158) internal successors, (1223), 19 states have internal predecessors, (1223), 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)
[2023-11-12 02:20:13,076 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user.
[2023-11-12 02:20:13,076 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 155
[2023-11-12 02:20:13,076 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand
[2023-11-12 02:20:17,285 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.03s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers []
[2023-11-12 02:20:20,610 INFO L124 PetriNetUnfolderBase]: 951/1803 cut-off events.
[2023-11-12 02:20:20,610 INFO L125 PetriNetUnfolderBase]: For 31941/31941 co-relation queries the response was YES.
[2023-11-12 02:20:20,628 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13824 conditions, 1803 events. 951/1803 cut-off events. For 31941/31941 co-relation queries the response was YES. Maximal size of possible extension queue 156. Compared 10847 event pairs, 32 based on Foata normal form. 5/1808 useless extension candidates. Maximal degree in co-relation 13513. Up to 767 conditions per place.
[2023-11-12 02:20:20,650 INFO L140 encePairwiseOnDemand]: 148/155 looper letters, 270 selfloop transitions, 129 changer transitions 63/462 dead transitions.
[2023-11-12 02:20:20,650 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 226 places, 462 transitions, 7521 flow
[2023-11-12 02:20:20,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states.
[2023-11-12 02:20:20,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states.
[2023-11-12 02:20:20,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 1426 transitions.
[2023-11-12 02:20:20,661 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4380952380952381
[2023-11-12 02:20:20,662 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 1426 transitions.
[2023-11-12 02:20:20,662 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 1426 transitions.
[2023-11-12 02:20:20,663 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic.
[2023-11-12 02:20:20,663 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 1426 transitions.
[2023-11-12 02:20:20,666 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 67.9047619047619) internal successors, (1426), 21 states have internal predecessors, (1426), 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)
[2023-11-12 02:20:20,672 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 155.0) internal successors, (3410), 22 states have internal predecessors, (3410), 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)
[2023-11-12 02:20:20,674 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 155.0) internal successors, (3410), 22 states have internal predecessors, (3410), 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)
[2023-11-12 02:20:20,674 INFO L175 Difference]: Start difference. First operand has 206 places, 279 transitions, 4054 flow. Second operand 21 states and 1426 transitions.
[2023-11-12 02:20:20,674 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 226 places, 462 transitions, 7521 flow
[2023-11-12 02:20:20,851 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 225 places, 462 transitions, 7098 flow, removed 193 selfloop flow, removed 1 redundant places.
[2023-11-12 02:20:20,859 INFO L231 Difference]: Finished difference. Result has 235 places, 312 transitions, 4827 flow
[2023-11-12 02:20:20,860 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=155, PETRI_DIFFERENCE_MINUEND_FLOW=3770, PETRI_DIFFERENCE_MINUEND_PLACES=205, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=279, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=83, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=159, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=4827, PETRI_PLACES=235, PETRI_TRANSITIONS=312}
[2023-11-12 02:20:20,860 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 215 predicate places.
[2023-11-12 02:20:20,860 INFO L495 AbstractCegarLoop]: Abstraction has has 235 places, 312 transitions, 4827 flow
[2023-11-12 02:20:20,861 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 64.36842105263158) internal successors, (1223), 19 states have internal predecessors, (1223), 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)
[2023-11-12 02:20:20,861 INFO L200 CegarLoopForPetriNet]: Found error trace
[2023-11-12 02:20:20,861 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2023-11-12 02:20:20,872 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0eaff618-de43-4165-89d4-83d22fe2c059/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0
[2023-11-12 02:20:21,067 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0eaff618-de43-4165-89d4-83d22fe2c059/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10
[2023-11-12 02:20:21,068 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] ===
[2023-11-12 02:20:21,068 INFO L160 PredicateUnifier]: Initialized classic predicate unifier
[2023-11-12 02:20:21,068 INFO L85 PathProgramCache]: Analyzing trace with hash -1550169824, now seen corresponding path program 10 times
[2023-11-12 02:20:21,068 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-12 02:20:21,068 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [806084051]
[2023-11-12 02:20:21,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-12 02:20:21,069 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-12 02:20:21,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-12 02:20:21,297 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked.
[2023-11-12 02:20:21,297 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-12 02:20:21,298 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [806084051]
[2023-11-12 02:20:21,298 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [806084051] provided 0 perfect and 1 imperfect interpolant sequences
[2023-11-12 02:20:21,298 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1974470689]
[2023-11-12 02:20:21,298 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST
[2023-11-12 02:20:21,298 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-12 02:20:21,299 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0eaff618-de43-4165-89d4-83d22fe2c059/bin/uautomizer-verify-uTZkv6EMXl/z3
[2023-11-12 02:20:21,300 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0eaff618-de43-4165-89d4-83d22fe2c059/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-12 02:20:21,313 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0eaff618-de43-4165-89d4-83d22fe2c059/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process
[2023-11-12 02:20:21,395 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s)
[2023-11-12 02:20:21,395 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat
[2023-11-12 02:20:21,396 INFO L262 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 15 conjunts are in the unsatisfiable core
[2023-11-12 02:20:21,398 INFO L285 TraceCheckSpWp]: Computing forward predicates...
[2023-11-12 02:20:21,584 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked.
[2023-11-12 02:20:21,584 INFO L327 TraceCheckSpWp]: Computing backward predicates...
[2023-11-12 02:20:21,949 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked.
[2023-11-12 02:20:21,950 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1974470689] provided 0 perfect and 2 imperfect interpolant sequences
[2023-11-12 02:20:21,950 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences.
[2023-11-12 02:20:21,950 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6, 6] total 13
[2023-11-12 02:20:21,950 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1315608163]
[2023-11-12 02:20:21,950 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton
[2023-11-12 02:20:21,951 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states
[2023-11-12 02:20:21,951 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-12 02:20:21,952 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants.
[2023-11-12 02:20:21,952 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182
[2023-11-12 02:20:22,136 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 155
[2023-11-12 02:20:22,137 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 235 places, 312 transitions, 4827 flow. Second operand has 14 states, 14 states have (on average 67.71428571428571) internal successors, (948), 14 states have internal predecessors, (948), 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)
[2023-11-12 02:20:22,137 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user.
[2023-11-12 02:20:22,137 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 155
[2023-11-12 02:20:22,137 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand
[2023-11-12 02:20:23,101 INFO L124 PetriNetUnfolderBase]: 877/1681 cut-off events.
[2023-11-12 02:20:23,101 INFO L125 PetriNetUnfolderBase]: For 36912/36912 co-relation queries the response was YES.
[2023-11-12 02:20:23,114 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13523 conditions, 1681 events. 877/1681 cut-off events. For 36912/36912 co-relation queries the response was YES. Maximal size of possible extension queue 147. Compared 10017 event pairs, 48 based on Foata normal form. 32/1713 useless extension candidates. Maximal degree in co-relation 13184. Up to 1272 conditions per place.
[2023-11-12 02:20:23,133 INFO L140 encePairwiseOnDemand]: 150/155 looper letters, 283 selfloop transitions, 79 changer transitions 24/386 dead transitions.
[2023-11-12 02:20:23,133 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 247 places, 386 transitions, 6699 flow
[2023-11-12 02:20:23,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states.
[2023-11-12 02:20:23,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states.
[2023-11-12 02:20:23,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 992 transitions.
[2023-11-12 02:20:23,136 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45714285714285713
[2023-11-12 02:20:23,136 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 992 transitions.
[2023-11-12 02:20:23,136 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 992 transitions.
[2023-11-12 02:20:23,137 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic.
[2023-11-12 02:20:23,137 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 992 transitions.
[2023-11-12 02:20:23,140 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 70.85714285714286) internal successors, (992), 14 states have internal predecessors, (992), 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)
[2023-11-12 02:20:23,144 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 155.0) internal successors, (2325), 15 states have internal predecessors, (2325), 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)
[2023-11-12 02:20:23,145 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 155.0) internal successors, (2325), 15 states have internal predecessors, (2325), 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)
[2023-11-12 02:20:23,145 INFO L175 Difference]: Start difference. First operand has 235 places, 312 transitions, 4827 flow. Second operand 14 states and 992 transitions.
[2023-11-12 02:20:23,145 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 247 places, 386 transitions, 6699 flow
[2023-11-12 02:20:23,396 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 234 places, 386 transitions, 6459 flow, removed 88 selfloop flow, removed 13 redundant places.
[2023-11-12 02:20:23,406 INFO L231 Difference]: Finished difference. Result has 238 places, 320 transitions, 5124 flow
[2023-11-12 02:20:23,407 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=155, PETRI_DIFFERENCE_MINUEND_FLOW=4573, PETRI_DIFFERENCE_MINUEND_PLACES=221, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=309, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=237, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=5124, PETRI_PLACES=238, PETRI_TRANSITIONS=320}
[2023-11-12 02:20:23,407 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 218 predicate places.
[2023-11-12 02:20:23,408 INFO L495 AbstractCegarLoop]: Abstraction has has 238 places, 320 transitions, 5124 flow
[2023-11-12 02:20:23,408 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 67.71428571428571) internal successors, (948), 14 states have internal predecessors, (948), 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)
[2023-11-12 02:20:23,408 INFO L200 CegarLoopForPetriNet]: Found error trace
[2023-11-12 02:20:23,409 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2023-11-12 02:20:23,422 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0eaff618-de43-4165-89d4-83d22fe2c059/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0
[2023-11-12 02:20:23,615 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0eaff618-de43-4165-89d4-83d22fe2c059/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11
[2023-11-12 02:20:23,615 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] ===
[2023-11-12 02:20:23,615 INFO L160 PredicateUnifier]: Initialized classic predicate unifier
[2023-11-12 02:20:23,615 INFO L85 PathProgramCache]: Analyzing trace with hash 1029898278, now seen corresponding path program 11 times
[2023-11-12 02:20:23,615 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-12 02:20:23,615 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [594820326]
[2023-11-12 02:20:23,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-12 02:20:23,616 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-12 02:20:23,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-12 02:20:23,999 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-11-12 02:20:23,999 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-12 02:20:23,999 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [594820326]
[2023-11-12 02:20:23,999 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [594820326] provided 0 perfect and 1 imperfect interpolant sequences
[2023-11-12 02:20:23,999 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2027840971]
[2023-11-12 02:20:23,999 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1
[2023-11-12 02:20:23,999 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-12 02:20:24,000 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0eaff618-de43-4165-89d4-83d22fe2c059/bin/uautomizer-verify-uTZkv6EMXl/z3
[2023-11-12 02:20:24,001 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0eaff618-de43-4165-89d4-83d22fe2c059/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-12 02:20:24,031 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0eaff618-de43-4165-89d4-83d22fe2c059/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process
[2023-11-12 02:20:24,108 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s)
[2023-11-12 02:20:24,108 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat
[2023-11-12 02:20:24,110 INFO L262 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 16 conjunts are in the unsatisfiable core
[2023-11-12 02:20:24,111 INFO L285 TraceCheckSpWp]: Computing forward predicates...
[2023-11-12 02:20:24,402 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-11-12 02:20:24,402 INFO L327 TraceCheckSpWp]: Computing backward predicates...
[2023-11-12 02:20:25,239 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-11-12 02:20:25,239 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2027840971] provided 0 perfect and 2 imperfect interpolant sequences
[2023-11-12 02:20:25,239 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences.
[2023-11-12 02:20:25,239 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 8] total 17
[2023-11-12 02:20:25,240 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1504948506]
[2023-11-12 02:20:25,240 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton
[2023-11-12 02:20:25,240 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states
[2023-11-12 02:20:25,241 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-12 02:20:25,241 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants.
[2023-11-12 02:20:25,241 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=226, Unknown=0, NotChecked=0, Total=306
[2023-11-12 02:20:25,575 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 155
[2023-11-12 02:20:25,576 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 238 places, 320 transitions, 5124 flow. Second operand has 18 states, 18 states have (on average 62.888888888888886) internal successors, (1132), 18 states have internal predecessors, (1132), 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)
[2023-11-12 02:20:25,576 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user.
[2023-11-12 02:20:25,576 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 155
[2023-11-12 02:20:25,576 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand
[2023-11-12 02:20:28,965 INFO L124 PetriNetUnfolderBase]: 1037/1942 cut-off events.
[2023-11-12 02:20:28,965 INFO L125 PetriNetUnfolderBase]: For 49535/49535 co-relation queries the response was YES.
[2023-11-12 02:20:28,979 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16340 conditions, 1942 events. 1037/1942 cut-off events. For 49535/49535 co-relation queries the response was YES. Maximal size of possible extension queue 170. Compared 11690 event pairs, 28 based on Foata normal form. 42/1984 useless extension candidates. Maximal degree in co-relation 16204. Up to 722 conditions per place.
[2023-11-12 02:20:28,991 INFO L140 encePairwiseOnDemand]: 148/155 looper letters, 193 selfloop transitions, 251 changer transitions 6/450 dead transitions.
[2023-11-12 02:20:28,992 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 262 places, 450 transitions, 8170 flow
[2023-11-12 02:20:28,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states.
[2023-11-12 02:20:28,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states.
[2023-11-12 02:20:28,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 1700 transitions.
[2023-11-12 02:20:28,995 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4218362282878412
[2023-11-12 02:20:28,995 INFO L72 ComplementDD]: Start complementDD. Operand 26 states and 1700 transitions.
[2023-11-12 02:20:28,996 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 1700 transitions.
[2023-11-12 02:20:28,996 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic.
[2023-11-12 02:20:28,996 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 26 states and 1700 transitions.
[2023-11-12 02:20:28,999 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 27 states, 26 states have (on average 65.38461538461539) internal successors, (1700), 26 states have internal predecessors, (1700), 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)
[2023-11-12 02:20:29,004 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 27 states, 27 states have (on average 155.0) internal successors, (4185), 27 states have internal predecessors, (4185), 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)
[2023-11-12 02:20:29,005 INFO L81 ComplementDD]: Finished complementDD. Result has 27 states, 27 states have (on average 155.0) internal successors, (4185), 27 states have internal predecessors, (4185), 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)
[2023-11-12 02:20:29,005 INFO L175 Difference]: Start difference. First operand has 238 places, 320 transitions, 5124 flow. Second operand 26 states and 1700 transitions.
[2023-11-12 02:20:29,005 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 262 places, 450 transitions, 8170 flow
[2023-11-12 02:20:29,322 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 246 places, 450 transitions, 7686 flow, removed 136 selfloop flow, removed 16 redundant places.
[2023-11-12 02:20:29,331 INFO L231 Difference]: Finished difference. Result has 256 places, 392 transitions, 7145 flow
[2023-11-12 02:20:29,332 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=155, PETRI_DIFFERENCE_MINUEND_FLOW=4775, PETRI_DIFFERENCE_MINUEND_PLACES=221, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=316, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=186, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=105, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=7145, PETRI_PLACES=256, PETRI_TRANSITIONS=392}
[2023-11-12 02:20:29,332 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 236 predicate places.
[2023-11-12 02:20:29,333 INFO L495 AbstractCegarLoop]: Abstraction has has 256 places, 392 transitions, 7145 flow
[2023-11-12 02:20:29,333 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 62.888888888888886) internal successors, (1132), 18 states have internal predecessors, (1132), 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)
[2023-11-12 02:20:29,333 INFO L200 CegarLoopForPetriNet]: Found error trace
[2023-11-12 02:20:29,333 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2023-11-12 02:20:29,343 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0eaff618-de43-4165-89d4-83d22fe2c059/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0
[2023-11-12 02:20:29,535 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0eaff618-de43-4165-89d4-83d22fe2c059/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12
[2023-11-12 02:20:29,535 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] ===
[2023-11-12 02:20:29,535 INFO L160 PredicateUnifier]: Initialized classic predicate unifier
[2023-11-12 02:20:29,536 INFO L85 PathProgramCache]: Analyzing trace with hash -1882388630, now seen corresponding path program 12 times
[2023-11-12 02:20:29,536 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-12 02:20:29,536 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [94570540]
[2023-11-12 02:20:29,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-12 02:20:29,536 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-12 02:20:29,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-12 02:20:29,846 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-11-12 02:20:29,846 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-12 02:20:29,846 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [94570540]
[2023-11-12 02:20:29,846 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [94570540] provided 0 perfect and 1 imperfect interpolant sequences
[2023-11-12 02:20:29,846 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1664276975]
[2023-11-12 02:20:29,846 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE
[2023-11-12 02:20:29,847 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-12 02:20:29,847 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0eaff618-de43-4165-89d4-83d22fe2c059/bin/uautomizer-verify-uTZkv6EMXl/z3
[2023-11-12 02:20:29,855 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0eaff618-de43-4165-89d4-83d22fe2c059/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-12 02:20:29,879 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0eaff618-de43-4165-89d4-83d22fe2c059/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process
[2023-11-12 02:20:29,952 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s)
[2023-11-12 02:20:29,952 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat
[2023-11-12 02:20:29,954 INFO L262 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 14 conjunts are in the unsatisfiable core
[2023-11-12 02:20:29,955 INFO L285 TraceCheckSpWp]: Computing forward predicates...
[2023-11-12 02:20:30,183 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-11-12 02:20:30,183 INFO L327 TraceCheckSpWp]: Computing backward predicates...
[2023-11-12 02:20:31,065 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-11-12 02:20:31,066 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1664276975] provided 0 perfect and 2 imperfect interpolant sequences
[2023-11-12 02:20:31,066 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences.
[2023-11-12 02:20:31,066 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 21
[2023-11-12 02:20:31,066 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1454920716]
[2023-11-12 02:20:31,066 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton
[2023-11-12 02:20:31,067 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states
[2023-11-12 02:20:31,067 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-12 02:20:31,067 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants.
[2023-11-12 02:20:31,067 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=348, Unknown=0, NotChecked=0, Total=462
[2023-11-12 02:20:31,606 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 155
[2023-11-12 02:20:31,607 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 256 places, 392 transitions, 7145 flow. Second operand has 22 states, 22 states have (on average 64.95454545454545) internal successors, (1429), 22 states have internal predecessors, (1429), 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)
[2023-11-12 02:20:31,607 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user.
[2023-11-12 02:20:31,607 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 155
[2023-11-12 02:20:31,607 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand