./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/weaver/popl20-queue-add-2.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 9bd2c7ff Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44b9bca3-ea7d-46f5-b6bf-ab1e60e9cc05/bin/uautomizer-verify-uCwYo4JHxu/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44b9bca3-ea7d-46f5-b6bf-ab1e60e9cc05/bin/uautomizer-verify-uCwYo4JHxu/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44b9bca3-ea7d-46f5-b6bf-ab1e60e9cc05/bin/uautomizer-verify-uCwYo4JHxu/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44b9bca3-ea7d-46f5-b6bf-ab1e60e9cc05/bin/uautomizer-verify-uCwYo4JHxu/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/popl20-queue-add-2.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44b9bca3-ea7d-46f5-b6bf-ab1e60e9cc05/bin/uautomizer-verify-uCwYo4JHxu/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44b9bca3-ea7d-46f5-b6bf-ab1e60e9cc05/bin/uautomizer-verify-uCwYo4JHxu --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 8c3fe688d0e9a9929009fc24c8ef56c8fc1bfa15613131b287e178eb7d2f1f1e --- Real Ultimate output --- This is Ultimate 0.2.3-dev-9bd2c7f [2023-11-19 08:03:51,378 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-19 08:03:51,450 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44b9bca3-ea7d-46f5-b6bf-ab1e60e9cc05/bin/uautomizer-verify-uCwYo4JHxu/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-19 08:03:51,461 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-19 08:03:51,462 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-19 08:03:51,502 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-19 08:03:51,503 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-19 08:03:51,503 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-19 08:03:51,505 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-19 08:03:51,512 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-19 08:03:51,513 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-19 08:03:51,514 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-19 08:03:51,514 INFO L153 SettingsManager]: * Use SBE=true [2023-11-19 08:03:51,516 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-19 08:03:51,516 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-19 08:03:51,517 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-19 08:03:51,517 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-19 08:03:51,518 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-19 08:03:51,518 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-19 08:03:51,518 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-19 08:03:51,519 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-19 08:03:51,519 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-19 08:03:51,520 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-19 08:03:51,520 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-19 08:03:51,520 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-19 08:03:51,521 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-19 08:03:51,522 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-19 08:03:51,522 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-19 08:03:51,522 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 08:03:51,523 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-19 08:03:51,524 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-19 08:03:51,524 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-19 08:03:51,525 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-19 08:03:51,525 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-19 08:03:51,525 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-19 08:03:51,525 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-19 08:03:51,525 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-19 08:03:51,526 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-19 08:03:51,526 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-19 08:03:51,526 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_44b9bca3-ea7d-46f5-b6bf-ab1e60e9cc05/bin/uautomizer-verify-uCwYo4JHxu/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44b9bca3-ea7d-46f5-b6bf-ab1e60e9cc05/bin/uautomizer-verify-uCwYo4JHxu Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8c3fe688d0e9a9929009fc24c8ef56c8fc1bfa15613131b287e178eb7d2f1f1e [2023-11-19 08:03:51,781 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-19 08:03:51,815 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-19 08:03:51,818 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-19 08:03:51,820 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-19 08:03:51,821 INFO L274 PluginConnector]: CDTParser initialized [2023-11-19 08:03:51,822 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44b9bca3-ea7d-46f5-b6bf-ab1e60e9cc05/bin/uautomizer-verify-uCwYo4JHxu/../../sv-benchmarks/c/weaver/popl20-queue-add-2.wvr.c [2023-11-19 08:03:55,203 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-19 08:03:55,479 INFO L384 CDTParser]: Found 1 translation units. [2023-11-19 08:03:55,480 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44b9bca3-ea7d-46f5-b6bf-ab1e60e9cc05/sv-benchmarks/c/weaver/popl20-queue-add-2.wvr.c [2023-11-19 08:03:55,494 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44b9bca3-ea7d-46f5-b6bf-ab1e60e9cc05/bin/uautomizer-verify-uCwYo4JHxu/data/8d7135697/7338bae517cc44f494af741382a01728/FLAGcbe7ef6aa [2023-11-19 08:03:55,518 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44b9bca3-ea7d-46f5-b6bf-ab1e60e9cc05/bin/uautomizer-verify-uCwYo4JHxu/data/8d7135697/7338bae517cc44f494af741382a01728 [2023-11-19 08:03:55,526 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-19 08:03:55,529 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-19 08:03:55,534 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-19 08:03:55,535 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-19 08:03:55,541 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-19 08:03:55,544 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 08:03:55" (1/1) ... [2023-11-19 08:03:55,546 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3dae7d19 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:03:55, skipping insertion in model container [2023-11-19 08:03:55,546 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 08:03:55" (1/1) ... [2023-11-19 08:03:55,582 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-19 08:03:55,844 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_44b9bca3-ea7d-46f5-b6bf-ab1e60e9cc05/sv-benchmarks/c/weaver/popl20-queue-add-2.wvr.c[2722,2735] [2023-11-19 08:03:55,869 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 08:03:55,886 INFO L202 MainTranslator]: Completed pre-run [2023-11-19 08:03:55,939 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_44b9bca3-ea7d-46f5-b6bf-ab1e60e9cc05/sv-benchmarks/c/weaver/popl20-queue-add-2.wvr.c[2722,2735] [2023-11-19 08:03:55,945 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 08:03:55,960 WARN L675 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-11-19 08:03:55,960 WARN L675 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-11-19 08:03:55,969 INFO L206 MainTranslator]: Completed translation [2023-11-19 08:03:55,969 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:03:55 WrapperNode [2023-11-19 08:03:55,970 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-19 08:03:55,972 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-19 08:03:55,972 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-19 08:03:55,972 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-19 08:03:55,980 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:03:55" (1/1) ... [2023-11-19 08:03:56,002 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:03:55" (1/1) ... [2023-11-19 08:03:56,044 INFO L138 Inliner]: procedures = 24, calls = 39, calls flagged for inlining = 12, calls inlined = 12, statements flattened = 161 [2023-11-19 08:03:56,044 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-19 08:03:56,045 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-19 08:03:56,045 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-19 08:03:56,046 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-19 08:03:56,056 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:03:55" (1/1) ... [2023-11-19 08:03:56,056 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:03:55" (1/1) ... [2023-11-19 08:03:56,072 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:03:55" (1/1) ... [2023-11-19 08:03:56,076 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:03:55" (1/1) ... [2023-11-19 08:03:56,083 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:03:55" (1/1) ... [2023-11-19 08:03:56,097 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:03:55" (1/1) ... [2023-11-19 08:03:56,099 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:03:55" (1/1) ... [2023-11-19 08:03:56,102 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:03:55" (1/1) ... [2023-11-19 08:03:56,115 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-19 08:03:56,116 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-19 08:03:56,116 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-19 08:03:56,116 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-19 08:03:56,117 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:03:55" (1/1) ... [2023-11-19 08:03:56,126 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 08:03:56,139 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44b9bca3-ea7d-46f5-b6bf-ab1e60e9cc05/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 08:03:56,151 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44b9bca3-ea7d-46f5-b6bf-ab1e60e9cc05/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-19 08:03:56,153 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44b9bca3-ea7d-46f5-b6bf-ab1e60e9cc05/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-19 08:03:56,189 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-19 08:03:56,190 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-11-19 08:03:56,190 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-11-19 08:03:56,190 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-11-19 08:03:56,191 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-11-19 08:03:56,191 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-19 08:03:56,191 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-19 08:03:56,191 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-19 08:03:56,192 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-11-19 08:03:56,192 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-11-19 08:03:56,192 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-19 08:03:56,194 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-19 08:03:56,195 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-19 08:03:56,196 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-19 08:03:56,196 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-19 08:03:56,198 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-19 08:03:56,308 INFO L236 CfgBuilder]: Building ICFG [2023-11-19 08:03:56,311 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-19 08:03:56,622 INFO L277 CfgBuilder]: Performing block encoding [2023-11-19 08:03:56,832 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-19 08:03:56,832 INFO L302 CfgBuilder]: Removed 3 assume(true) statements. [2023-11-19 08:03:56,836 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 08:03:56 BoogieIcfgContainer [2023-11-19 08:03:56,838 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-19 08:03:56,841 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-19 08:03:56,845 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-19 08:03:56,849 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-19 08:03:56,849 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 08:03:55" (1/3) ... [2023-11-19 08:03:56,850 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@41f96e7e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 08:03:56, skipping insertion in model container [2023-11-19 08:03:56,850 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:03:55" (2/3) ... [2023-11-19 08:03:56,851 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@41f96e7e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 08:03:56, skipping insertion in model container [2023-11-19 08:03:56,851 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 08:03:56" (3/3) ... [2023-11-19 08:03:56,852 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-queue-add-2.wvr.c [2023-11-19 08:03:56,862 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-11-19 08:03:56,874 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-19 08:03:56,874 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-19 08:03:56,874 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-19 08:03:56,968 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-11-19 08:03:57,026 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 136 places, 140 transitions, 294 flow [2023-11-19 08:03:57,117 INFO L124 PetriNetUnfolderBase]: 11/138 cut-off events. [2023-11-19 08:03:57,117 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-19 08:03:57,123 INFO L83 FinitePrefix]: Finished finitePrefix Result has 147 conditions, 138 events. 11/138 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 80 event pairs, 0 based on Foata normal form. 0/126 useless extension candidates. Maximal degree in co-relation 102. Up to 3 conditions per place. [2023-11-19 08:03:57,124 INFO L82 GeneralOperation]: Start removeDead. Operand has 136 places, 140 transitions, 294 flow [2023-11-19 08:03:57,130 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 125 places, 129 transitions, 270 flow [2023-11-19 08:03:57,135 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-11-19 08:03:57,147 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 125 places, 129 transitions, 270 flow [2023-11-19 08:03:57,151 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 125 places, 129 transitions, 270 flow [2023-11-19 08:03:57,151 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 125 places, 129 transitions, 270 flow [2023-11-19 08:03:57,223 INFO L124 PetriNetUnfolderBase]: 11/129 cut-off events. [2023-11-19 08:03:57,223 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-19 08:03:57,224 INFO L83 FinitePrefix]: Finished finitePrefix Result has 138 conditions, 129 events. 11/129 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 79 event pairs, 0 based on Foata normal form. 0/118 useless extension candidates. Maximal degree in co-relation 102. Up to 3 conditions per place. [2023-11-19 08:03:57,226 INFO L119 LiptonReduction]: Number of co-enabled transitions 652 [2023-11-19 08:04:02,095 INFO L134 LiptonReduction]: Checked pairs total: 744 [2023-11-19 08:04:02,095 INFO L136 LiptonReduction]: Total number of compositions: 136 [2023-11-19 08:04:02,112 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-19 08:04:02,120 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;@3b70d308, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-19 08:04:02,120 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-11-19 08:04:02,127 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-19 08:04:02,127 INFO L124 PetriNetUnfolderBase]: 3/16 cut-off events. [2023-11-19 08:04:02,128 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-19 08:04:02,128 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 08:04:02,129 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 08:04:02,129 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-19 08:04:02,135 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:04:02,136 INFO L85 PathProgramCache]: Analyzing trace with hash 935866931, now seen corresponding path program 1 times [2023-11-19 08:04:02,147 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:04:02,147 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [760119537] [2023-11-19 08:04:02,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:04:02,148 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:04:02,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:04:02,568 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 08:04:02,568 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:04:02,569 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [760119537] [2023-11-19 08:04:02,570 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [760119537] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 08:04:02,570 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 08:04:02,570 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-19 08:04:02,572 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [898252905] [2023-11-19 08:04:02,573 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 08:04:02,583 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 08:04:02,588 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:04:02,613 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 08:04:02,614 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 08:04:02,627 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 120 out of 276 [2023-11-19 08:04:02,631 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 21 places, 17 transitions, 46 flow. Second operand has 3 states, 3 states have (on average 124.66666666666667) internal successors, (374), 3 states have internal predecessors, (374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:04:02,631 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 08:04:02,631 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 120 of 276 [2023-11-19 08:04:02,632 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 08:04:02,722 INFO L124 PetriNetUnfolderBase]: 48/86 cut-off events. [2023-11-19 08:04:02,722 INFO L125 PetriNetUnfolderBase]: For 9/9 co-relation queries the response was YES. [2023-11-19 08:04:02,724 INFO L83 FinitePrefix]: Finished finitePrefix Result has 190 conditions, 86 events. 48/86 cut-off events. For 9/9 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 176 event pairs, 9 based on Foata normal form. 4/69 useless extension candidates. Maximal degree in co-relation 144. Up to 65 conditions per place. [2023-11-19 08:04:02,727 INFO L140 encePairwiseOnDemand]: 271/276 looper letters, 20 selfloop transitions, 3 changer transitions 0/23 dead transitions. [2023-11-19 08:04:02,728 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 23 places, 23 transitions, 107 flow [2023-11-19 08:04:02,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 08:04:02,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-19 08:04:02,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 385 transitions. [2023-11-19 08:04:02,755 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46497584541062803 [2023-11-19 08:04:02,756 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 385 transitions. [2023-11-19 08:04:02,757 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 385 transitions. [2023-11-19 08:04:02,762 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 08:04:02,765 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 385 transitions. [2023-11-19 08:04:02,770 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 128.33333333333334) internal successors, (385), 3 states have internal predecessors, (385), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:04:02,777 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 276.0) internal successors, (1104), 4 states have internal predecessors, (1104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:04:02,778 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 276.0) internal successors, (1104), 4 states have internal predecessors, (1104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:04:02,780 INFO L175 Difference]: Start difference. First operand has 21 places, 17 transitions, 46 flow. Second operand 3 states and 385 transitions. [2023-11-19 08:04:02,781 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 23 places, 23 transitions, 107 flow [2023-11-19 08:04:02,785 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 19 places, 23 transitions, 97 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-11-19 08:04:02,787 INFO L231 Difference]: Finished difference. Result has 20 places, 19 transitions, 59 flow [2023-11-19 08:04:02,789 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=276, PETRI_DIFFERENCE_MINUEND_FLOW=38, PETRI_DIFFERENCE_MINUEND_PLACES=17, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=17, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=59, PETRI_PLACES=20, PETRI_TRANSITIONS=19} [2023-11-19 08:04:02,794 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, -1 predicate places. [2023-11-19 08:04:02,794 INFO L495 AbstractCegarLoop]: Abstraction has has 20 places, 19 transitions, 59 flow [2023-11-19 08:04:02,795 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 124.66666666666667) internal successors, (374), 3 states have internal predecessors, (374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:04:02,795 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 08:04:02,796 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 08:04:02,796 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-19 08:04:02,797 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-19 08:04:02,798 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:04:02,799 INFO L85 PathProgramCache]: Analyzing trace with hash -336527803, now seen corresponding path program 2 times [2023-11-19 08:04:02,799 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:04:02,799 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2088321899] [2023-11-19 08:04:02,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:04:02,800 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:04:02,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:04:03,118 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 08:04:03,118 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:04:03,119 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2088321899] [2023-11-19 08:04:03,119 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2088321899] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 08:04:03,119 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 08:04:03,119 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 08:04:03,120 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1777736660] [2023-11-19 08:04:03,120 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 08:04:03,121 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-19 08:04:03,122 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:04:03,122 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-19 08:04:03,123 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-19 08:04:03,164 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 116 out of 276 [2023-11-19 08:04:03,165 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 20 places, 19 transitions, 59 flow. Second operand has 4 states, 4 states have (on average 119.5) internal successors, (478), 4 states have internal predecessors, (478), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:04:03,166 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 08:04:03,166 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 116 of 276 [2023-11-19 08:04:03,166 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 08:04:03,261 INFO L124 PetriNetUnfolderBase]: 55/107 cut-off events. [2023-11-19 08:04:03,262 INFO L125 PetriNetUnfolderBase]: For 16/16 co-relation queries the response was YES. [2023-11-19 08:04:03,263 INFO L83 FinitePrefix]: Finished finitePrefix Result has 279 conditions, 107 events. 55/107 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 233 event pairs, 32 based on Foata normal form. 6/91 useless extension candidates. Maximal degree in co-relation 90. Up to 87 conditions per place. [2023-11-19 08:04:03,265 INFO L140 encePairwiseOnDemand]: 271/276 looper letters, 18 selfloop transitions, 2 changer transitions 7/27 dead transitions. [2023-11-19 08:04:03,265 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 23 places, 27 transitions, 131 flow [2023-11-19 08:04:03,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-19 08:04:03,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-19 08:04:03,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 491 transitions. [2023-11-19 08:04:03,268 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4447463768115942 [2023-11-19 08:04:03,268 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 491 transitions. [2023-11-19 08:04:03,268 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 491 transitions. [2023-11-19 08:04:03,270 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 08:04:03,270 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 491 transitions. [2023-11-19 08:04:03,275 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 122.75) internal successors, (491), 4 states have internal predecessors, (491), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:04:03,280 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 276.0) internal successors, (1380), 5 states have internal predecessors, (1380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:04:03,281 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 276.0) internal successors, (1380), 5 states have internal predecessors, (1380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:04:03,281 INFO L175 Difference]: Start difference. First operand has 20 places, 19 transitions, 59 flow. Second operand 4 states and 491 transitions. [2023-11-19 08:04:03,281 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 23 places, 27 transitions, 131 flow [2023-11-19 08:04:03,283 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 22 places, 27 transitions, 128 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-19 08:04:03,285 INFO L231 Difference]: Finished difference. Result has 24 places, 20 transitions, 72 flow [2023-11-19 08:04:03,285 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=276, PETRI_DIFFERENCE_MINUEND_FLOW=56, PETRI_DIFFERENCE_MINUEND_PLACES=19, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=19, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=72, PETRI_PLACES=24, PETRI_TRANSITIONS=20} [2023-11-19 08:04:03,287 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 3 predicate places. [2023-11-19 08:04:03,292 INFO L495 AbstractCegarLoop]: Abstraction has has 24 places, 20 transitions, 72 flow [2023-11-19 08:04:03,293 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 119.5) internal successors, (478), 4 states have internal predecessors, (478), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:04:03,293 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 08:04:03,293 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 08:04:03,294 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-19 08:04:03,294 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-19 08:04:03,298 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:04:03,298 INFO L85 PathProgramCache]: Analyzing trace with hash -1123211308, now seen corresponding path program 1 times [2023-11-19 08:04:03,298 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:04:03,299 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1602193060] [2023-11-19 08:04:03,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:04:03,300 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:04:03,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:04:03,641 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-19 08:04:03,642 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:04:03,642 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1602193060] [2023-11-19 08:04:03,642 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1602193060] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 08:04:03,642 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 08:04:03,642 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-19 08:04:03,643 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1328652952] [2023-11-19 08:04:03,643 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 08:04:03,643 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-19 08:04:03,644 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:04:03,644 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-19 08:04:03,645 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-11-19 08:04:03,710 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 116 out of 276 [2023-11-19 08:04:03,712 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 24 places, 20 transitions, 72 flow. Second operand has 7 states, 7 states have (on average 118.14285714285714) internal successors, (827), 7 states have internal predecessors, (827), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:04:03,712 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 08:04:03,713 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 116 of 276 [2023-11-19 08:04:03,713 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 08:04:03,875 INFO L124 PetriNetUnfolderBase]: 73/141 cut-off events. [2023-11-19 08:04:03,876 INFO L125 PetriNetUnfolderBase]: For 19/19 co-relation queries the response was YES. [2023-11-19 08:04:03,879 INFO L83 FinitePrefix]: Finished finitePrefix Result has 380 conditions, 141 events. 73/141 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 387 event pairs, 23 based on Foata normal form. 1/107 useless extension candidates. Maximal degree in co-relation 366. Up to 69 conditions per place. [2023-11-19 08:04:03,882 INFO L140 encePairwiseOnDemand]: 269/276 looper letters, 33 selfloop transitions, 7 changer transitions 2/42 dead transitions. [2023-11-19 08:04:03,882 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 28 places, 42 transitions, 218 flow [2023-11-19 08:04:03,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-19 08:04:03,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-19 08:04:03,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 738 transitions. [2023-11-19 08:04:03,886 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44565217391304346 [2023-11-19 08:04:03,886 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 738 transitions. [2023-11-19 08:04:03,886 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 738 transitions. [2023-11-19 08:04:03,887 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 08:04:03,887 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 738 transitions. [2023-11-19 08:04:03,890 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 123.0) internal successors, (738), 6 states have internal predecessors, (738), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:04:03,894 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 276.0) internal successors, (1932), 7 states have internal predecessors, (1932), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:04:03,896 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 276.0) internal successors, (1932), 7 states have internal predecessors, (1932), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:04:03,896 INFO L175 Difference]: Start difference. First operand has 24 places, 20 transitions, 72 flow. Second operand 6 states and 738 transitions. [2023-11-19 08:04:03,896 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 28 places, 42 transitions, 218 flow [2023-11-19 08:04:03,899 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 26 places, 42 transitions, 210 flow, removed 3 selfloop flow, removed 2 redundant places. [2023-11-19 08:04:03,900 INFO L231 Difference]: Finished difference. Result has 27 places, 22 transitions, 92 flow [2023-11-19 08:04:03,900 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=276, PETRI_DIFFERENCE_MINUEND_FLOW=64, PETRI_DIFFERENCE_MINUEND_PLACES=21, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=20, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=92, PETRI_PLACES=27, PETRI_TRANSITIONS=22} [2023-11-19 08:04:03,902 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 6 predicate places. [2023-11-19 08:04:03,905 INFO L495 AbstractCegarLoop]: Abstraction has has 27 places, 22 transitions, 92 flow [2023-11-19 08:04:03,907 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 118.14285714285714) internal successors, (827), 7 states have internal predecessors, (827), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:04:03,907 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 08:04:03,907 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 08:04:03,908 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-19 08:04:03,908 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-19 08:04:03,908 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:04:03,909 INFO L85 PathProgramCache]: Analyzing trace with hash 1350656426, now seen corresponding path program 1 times [2023-11-19 08:04:03,909 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:04:03,910 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1344732746] [2023-11-19 08:04:03,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:04:03,910 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:04:03,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:04:04,143 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 08:04:04,143 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:04:04,144 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1344732746] [2023-11-19 08:04:04,144 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1344732746] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 08:04:04,144 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1969194650] [2023-11-19 08:04:04,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:04:04,145 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:04:04,145 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44b9bca3-ea7d-46f5-b6bf-ab1e60e9cc05/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 08:04:04,147 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44b9bca3-ea7d-46f5-b6bf-ab1e60e9cc05/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 08:04:04,169 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44b9bca3-ea7d-46f5-b6bf-ab1e60e9cc05/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-19 08:04:04,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:04:04,266 INFO L262 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-19 08:04:04,272 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 08:04:04,405 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 08:04:04,405 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 08:04:04,537 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 08:04:04,537 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1969194650] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 08:04:04,537 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 08:04:04,538 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2023-11-19 08:04:04,538 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1065128119] [2023-11-19 08:04:04,538 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 08:04:04,539 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-19 08:04:04,540 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:04:04,542 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-19 08:04:04,542 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2023-11-19 08:04:04,663 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 112 out of 276 [2023-11-19 08:04:04,665 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 27 places, 22 transitions, 92 flow. Second operand has 12 states, 12 states have (on average 114.66666666666667) internal successors, (1376), 12 states have internal predecessors, (1376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:04:04,666 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 08:04:04,666 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 112 of 276 [2023-11-19 08:04:04,666 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 08:04:04,867 INFO L124 PetriNetUnfolderBase]: 112/231 cut-off events. [2023-11-19 08:04:04,867 INFO L125 PetriNetUnfolderBase]: For 169/169 co-relation queries the response was YES. [2023-11-19 08:04:04,868 INFO L83 FinitePrefix]: Finished finitePrefix Result has 667 conditions, 231 events. 112/231 cut-off events. For 169/169 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 800 event pairs, 59 based on Foata normal form. 12/231 useless extension candidates. Maximal degree in co-relation 390. Up to 141 conditions per place. [2023-11-19 08:04:04,869 INFO L140 encePairwiseOnDemand]: 271/276 looper letters, 37 selfloop transitions, 5 changer transitions 2/44 dead transitions. [2023-11-19 08:04:04,870 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 32 places, 44 transitions, 263 flow [2023-11-19 08:04:04,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-19 08:04:04,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-19 08:04:04,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 712 transitions. [2023-11-19 08:04:04,873 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42995169082125606 [2023-11-19 08:04:04,873 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 712 transitions. [2023-11-19 08:04:04,874 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 712 transitions. [2023-11-19 08:04:04,874 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 08:04:04,875 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 712 transitions. [2023-11-19 08:04:04,877 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 118.66666666666667) internal successors, (712), 6 states have internal predecessors, (712), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:04:04,881 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 276.0) internal successors, (1932), 7 states have internal predecessors, (1932), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:04:04,883 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 276.0) internal successors, (1932), 7 states have internal predecessors, (1932), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:04:04,883 INFO L175 Difference]: Start difference. First operand has 27 places, 22 transitions, 92 flow. Second operand 6 states and 712 transitions. [2023-11-19 08:04:04,884 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 32 places, 44 transitions, 263 flow [2023-11-19 08:04:04,886 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 30 places, 44 transitions, 251 flow, removed 2 selfloop flow, removed 2 redundant places. [2023-11-19 08:04:04,888 INFO L231 Difference]: Finished difference. Result has 33 places, 25 transitions, 128 flow [2023-11-19 08:04:04,888 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=276, PETRI_DIFFERENCE_MINUEND_FLOW=85, PETRI_DIFFERENCE_MINUEND_PLACES=25, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=22, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=128, PETRI_PLACES=33, PETRI_TRANSITIONS=25} [2023-11-19 08:04:04,890 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 12 predicate places. [2023-11-19 08:04:04,891 INFO L495 AbstractCegarLoop]: Abstraction has has 33 places, 25 transitions, 128 flow [2023-11-19 08:04:04,895 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 114.66666666666667) internal successors, (1376), 12 states have internal predecessors, (1376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:04:04,895 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 08:04:04,896 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 08:04:04,922 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44b9bca3-ea7d-46f5-b6bf-ab1e60e9cc05/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-19 08:04:05,117 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44b9bca3-ea7d-46f5-b6bf-ab1e60e9cc05/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:04:05,118 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-19 08:04:05,118 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:04:05,118 INFO L85 PathProgramCache]: Analyzing trace with hash -847285227, now seen corresponding path program 1 times [2023-11-19 08:04:05,118 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:04:05,118 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1725787812] [2023-11-19 08:04:05,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:04:05,119 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:04:05,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:04:05,353 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 08:04:05,353 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:04:05,353 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1725787812] [2023-11-19 08:04:05,353 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1725787812] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 08:04:05,353 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [457177504] [2023-11-19 08:04:05,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:04:05,354 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:04:05,354 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44b9bca3-ea7d-46f5-b6bf-ab1e60e9cc05/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 08:04:05,355 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44b9bca3-ea7d-46f5-b6bf-ab1e60e9cc05/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 08:04:05,358 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44b9bca3-ea7d-46f5-b6bf-ab1e60e9cc05/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-19 08:04:05,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:04:05,463 INFO L262 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-19 08:04:05,465 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 08:04:05,503 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-19 08:04:05,503 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 08:04:05,504 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [457177504] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 08:04:05,504 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-19 08:04:05,504 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 7 [2023-11-19 08:04:05,505 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1103079486] [2023-11-19 08:04:05,505 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 08:04:05,505 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-19 08:04:05,506 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:04:05,506 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-19 08:04:05,506 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2023-11-19 08:04:05,513 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 120 out of 276 [2023-11-19 08:04:05,514 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 33 places, 25 transitions, 128 flow. Second operand has 4 states, 4 states have (on average 124.0) internal successors, (496), 4 states have internal predecessors, (496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:04:05,514 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 08:04:05,515 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 120 of 276 [2023-11-19 08:04:05,515 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 08:04:05,630 INFO L124 PetriNetUnfolderBase]: 135/280 cut-off events. [2023-11-19 08:04:05,630 INFO L125 PetriNetUnfolderBase]: For 176/176 co-relation queries the response was YES. [2023-11-19 08:04:05,631 INFO L83 FinitePrefix]: Finished finitePrefix Result has 879 conditions, 280 events. 135/280 cut-off events. For 176/176 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 1021 event pairs, 28 based on Foata normal form. 20/269 useless extension candidates. Maximal degree in co-relation 697. Up to 135 conditions per place. [2023-11-19 08:04:05,633 INFO L140 encePairwiseOnDemand]: 271/276 looper letters, 35 selfloop transitions, 9 changer transitions 4/48 dead transitions. [2023-11-19 08:04:05,633 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 48 transitions, 306 flow [2023-11-19 08:04:05,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-19 08:04:05,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-19 08:04:05,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 521 transitions. [2023-11-19 08:04:05,636 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47192028985507245 [2023-11-19 08:04:05,637 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 521 transitions. [2023-11-19 08:04:05,637 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 521 transitions. [2023-11-19 08:04:05,637 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 08:04:05,637 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 521 transitions. [2023-11-19 08:04:05,639 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 130.25) internal successors, (521), 4 states have internal predecessors, (521), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:04:05,642 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 276.0) internal successors, (1380), 5 states have internal predecessors, (1380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:04:05,642 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 276.0) internal successors, (1380), 5 states have internal predecessors, (1380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:04:05,643 INFO L175 Difference]: Start difference. First operand has 33 places, 25 transitions, 128 flow. Second operand 4 states and 521 transitions. [2023-11-19 08:04:05,643 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 48 transitions, 306 flow [2023-11-19 08:04:05,645 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 48 transitions, 283 flow, removed 9 selfloop flow, removed 3 redundant places. [2023-11-19 08:04:05,647 INFO L231 Difference]: Finished difference. Result has 35 places, 28 transitions, 161 flow [2023-11-19 08:04:05,647 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=276, PETRI_DIFFERENCE_MINUEND_FLOW=113, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=161, PETRI_PLACES=35, PETRI_TRANSITIONS=28} [2023-11-19 08:04:05,648 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 14 predicate places. [2023-11-19 08:04:05,648 INFO L495 AbstractCegarLoop]: Abstraction has has 35 places, 28 transitions, 161 flow [2023-11-19 08:04:05,648 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 124.0) internal successors, (496), 4 states have internal predecessors, (496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:04:05,649 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 08:04:05,649 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 08:04:05,672 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44b9bca3-ea7d-46f5-b6bf-ab1e60e9cc05/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-19 08:04:05,870 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44b9bca3-ea7d-46f5-b6bf-ab1e60e9cc05/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:04:05,870 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-19 08:04:05,871 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:04:05,871 INFO L85 PathProgramCache]: Analyzing trace with hash 2106004613, now seen corresponding path program 2 times [2023-11-19 08:04:05,871 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:04:05,872 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1092929273] [2023-11-19 08:04:05,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:04:05,872 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:04:05,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:04:06,590 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 08:04:06,591 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:04:06,591 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1092929273] [2023-11-19 08:04:06,591 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1092929273] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 08:04:06,591 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [491051556] [2023-11-19 08:04:06,591 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-19 08:04:06,592 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:04:06,592 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44b9bca3-ea7d-46f5-b6bf-ab1e60e9cc05/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 08:04:06,593 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44b9bca3-ea7d-46f5-b6bf-ab1e60e9cc05/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 08:04:06,611 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44b9bca3-ea7d-46f5-b6bf-ab1e60e9cc05/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-19 08:04:06,706 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-19 08:04:06,706 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 08:04:06,708 INFO L262 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 15 conjunts are in the unsatisfiable core [2023-11-19 08:04:06,710 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 08:04:06,774 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-19 08:04:06,774 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 08:04:06,829 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-11-19 08:04:06,830 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 12 [2023-11-19 08:04:06,857 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-19 08:04:06,857 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [491051556] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 08:04:06,858 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 08:04:06,858 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 4, 3] total 11 [2023-11-19 08:04:06,858 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1022252876] [2023-11-19 08:04:06,858 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 08:04:06,859 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-19 08:04:06,860 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:04:06,862 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-19 08:04:06,863 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2023-11-19 08:04:07,193 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 106 out of 276 [2023-11-19 08:04:07,195 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 28 transitions, 161 flow. Second operand has 12 states, 12 states have (on average 108.83333333333333) internal successors, (1306), 12 states have internal predecessors, (1306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:04:07,195 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 08:04:07,195 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 106 of 276 [2023-11-19 08:04:07,195 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 08:04:07,591 INFO L124 PetriNetUnfolderBase]: 176/329 cut-off events. [2023-11-19 08:04:07,591 INFO L125 PetriNetUnfolderBase]: For 303/303 co-relation queries the response was YES. [2023-11-19 08:04:07,592 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1214 conditions, 329 events. 176/329 cut-off events. For 303/303 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 1184 event pairs, 30 based on Foata normal form. 16/291 useless extension candidates. Maximal degree in co-relation 1188. Up to 183 conditions per place. [2023-11-19 08:04:07,595 INFO L140 encePairwiseOnDemand]: 268/276 looper letters, 52 selfloop transitions, 16 changer transitions 0/68 dead transitions. [2023-11-19 08:04:07,595 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 68 transitions, 467 flow [2023-11-19 08:04:07,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-19 08:04:07,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-11-19 08:04:07,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1120 transitions. [2023-11-19 08:04:07,600 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4057971014492754 [2023-11-19 08:04:07,600 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1120 transitions. [2023-11-19 08:04:07,600 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1120 transitions. [2023-11-19 08:04:07,601 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 08:04:07,601 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1120 transitions. [2023-11-19 08:04:07,605 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 112.0) internal successors, (1120), 10 states have internal predecessors, (1120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:04:07,610 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 276.0) internal successors, (3036), 11 states have internal predecessors, (3036), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:04:07,611 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 276.0) internal successors, (3036), 11 states have internal predecessors, (3036), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:04:07,611 INFO L175 Difference]: Start difference. First operand has 35 places, 28 transitions, 161 flow. Second operand 10 states and 1120 transitions. [2023-11-19 08:04:07,611 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 68 transitions, 467 flow [2023-11-19 08:04:07,614 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 68 transitions, 439 flow, removed 14 selfloop flow, removed 2 redundant places. [2023-11-19 08:04:07,615 INFO L231 Difference]: Finished difference. Result has 43 places, 41 transitions, 289 flow [2023-11-19 08:04:07,616 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=276, PETRI_DIFFERENCE_MINUEND_FLOW=147, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=289, PETRI_PLACES=43, PETRI_TRANSITIONS=41} [2023-11-19 08:04:07,617 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 22 predicate places. [2023-11-19 08:04:07,617 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 41 transitions, 289 flow [2023-11-19 08:04:07,618 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 108.83333333333333) internal successors, (1306), 12 states have internal predecessors, (1306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:04:07,618 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 08:04:07,618 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 08:04:07,644 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44b9bca3-ea7d-46f5-b6bf-ab1e60e9cc05/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-19 08:04:07,840 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44b9bca3-ea7d-46f5-b6bf-ab1e60e9cc05/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-11-19 08:04:07,840 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-19 08:04:07,840 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:04:07,840 INFO L85 PathProgramCache]: Analyzing trace with hash -583090043, now seen corresponding path program 3 times [2023-11-19 08:04:07,841 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:04:07,841 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1200253886] [2023-11-19 08:04:07,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:04:07,841 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:04:07,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:04:08,615 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 08:04:08,616 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:04:08,616 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1200253886] [2023-11-19 08:04:08,616 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1200253886] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 08:04:08,616 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [636066388] [2023-11-19 08:04:08,616 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-19 08:04:08,617 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:04:08,617 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44b9bca3-ea7d-46f5-b6bf-ab1e60e9cc05/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 08:04:08,618 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44b9bca3-ea7d-46f5-b6bf-ab1e60e9cc05/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 08:04:08,641 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44b9bca3-ea7d-46f5-b6bf-ab1e60e9cc05/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-19 08:04:08,763 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-19 08:04:08,763 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 08:04:08,765 INFO L262 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 24 conjunts are in the unsatisfiable core [2023-11-19 08:04:08,769 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 08:04:09,095 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 08:04:09,098 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 15 [2023-11-19 08:04:09,242 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 08:04:09,242 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 08:04:09,459 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-19 08:04:09,460 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 37 [2023-11-19 08:04:09,470 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2023-11-19 08:04:09,804 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 08:04:09,804 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [636066388] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 08:04:09,805 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 08:04:09,805 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 22 [2023-11-19 08:04:09,805 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1638229444] [2023-11-19 08:04:09,805 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 08:04:09,805 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-11-19 08:04:09,806 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:04:09,806 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-11-19 08:04:09,807 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=424, Unknown=1, NotChecked=0, Total=506 [2023-11-19 08:04:10,890 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 89 out of 276 [2023-11-19 08:04:10,893 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 41 transitions, 289 flow. Second operand has 23 states, 23 states have (on average 90.8695652173913) internal successors, (2090), 23 states have internal predecessors, (2090), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:04:10,893 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 08:04:10,893 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 89 of 276 [2023-11-19 08:04:10,893 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 08:04:12,156 INFO L124 PetriNetUnfolderBase]: 338/640 cut-off events. [2023-11-19 08:04:12,156 INFO L125 PetriNetUnfolderBase]: For 1138/1138 co-relation queries the response was YES. [2023-11-19 08:04:12,159 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2501 conditions, 640 events. 338/640 cut-off events. For 1138/1138 co-relation queries the response was YES. Maximal size of possible extension queue 48. Compared 2895 event pairs, 72 based on Foata normal form. 18/548 useless extension candidates. Maximal degree in co-relation 1923. Up to 258 conditions per place. [2023-11-19 08:04:12,164 INFO L140 encePairwiseOnDemand]: 268/276 looper letters, 84 selfloop transitions, 38 changer transitions 1/123 dead transitions. [2023-11-19 08:04:12,164 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 123 transitions, 981 flow [2023-11-19 08:04:12,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-11-19 08:04:12,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-11-19 08:04:12,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 1519 transitions. [2023-11-19 08:04:12,172 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3439764492753623 [2023-11-19 08:04:12,173 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 1519 transitions. [2023-11-19 08:04:12,173 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 1519 transitions. [2023-11-19 08:04:12,174 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 08:04:12,175 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 1519 transitions. [2023-11-19 08:04:12,180 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 94.9375) internal successors, (1519), 16 states have internal predecessors, (1519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:04:12,189 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 276.0) internal successors, (4692), 17 states have internal predecessors, (4692), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:04:12,191 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 276.0) internal successors, (4692), 17 states have internal predecessors, (4692), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:04:12,191 INFO L175 Difference]: Start difference. First operand has 43 places, 41 transitions, 289 flow. Second operand 16 states and 1519 transitions. [2023-11-19 08:04:12,191 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 123 transitions, 981 flow [2023-11-19 08:04:12,196 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 123 transitions, 963 flow, removed 7 selfloop flow, removed 2 redundant places. [2023-11-19 08:04:12,201 INFO L231 Difference]: Finished difference. Result has 63 places, 68 transitions, 662 flow [2023-11-19 08:04:12,201 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=276, PETRI_DIFFERENCE_MINUEND_FLOW=271, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=662, PETRI_PLACES=63, PETRI_TRANSITIONS=68} [2023-11-19 08:04:12,202 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 42 predicate places. [2023-11-19 08:04:12,202 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 68 transitions, 662 flow [2023-11-19 08:04:12,204 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 90.8695652173913) internal successors, (2090), 23 states have internal predecessors, (2090), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:04:12,204 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 08:04:12,204 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 08:04:12,231 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44b9bca3-ea7d-46f5-b6bf-ab1e60e9cc05/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-19 08:04:12,426 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44b9bca3-ea7d-46f5-b6bf-ab1e60e9cc05/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2023-11-19 08:04:12,427 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-19 08:04:12,427 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:04:12,427 INFO L85 PathProgramCache]: Analyzing trace with hash 834177043, now seen corresponding path program 4 times [2023-11-19 08:04:12,427 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:04:12,427 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1246522982] [2023-11-19 08:04:12,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:04:12,428 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:04:12,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:04:13,116 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 08:04:13,117 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:04:13,117 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1246522982] [2023-11-19 08:04:13,117 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1246522982] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 08:04:13,117 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1481753351] [2023-11-19 08:04:13,117 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-19 08:04:13,118 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:04:13,118 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44b9bca3-ea7d-46f5-b6bf-ab1e60e9cc05/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 08:04:13,119 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44b9bca3-ea7d-46f5-b6bf-ab1e60e9cc05/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 08:04:13,131 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44b9bca3-ea7d-46f5-b6bf-ab1e60e9cc05/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-19 08:04:13,229 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-19 08:04:13,229 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 08:04:13,231 INFO L262 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 28 conjunts are in the unsatisfiable core [2023-11-19 08:04:13,234 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 08:04:13,479 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 08:04:13,480 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 13 [2023-11-19 08:04:13,575 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 08:04:13,575 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 08:04:13,721 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-19 08:04:13,722 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 37 [2023-11-19 08:04:13,729 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2023-11-19 08:04:14,005 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 08:04:14,006 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1481753351] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 08:04:14,006 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 08:04:14,006 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 8] total 21 [2023-11-19 08:04:14,006 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1133444212] [2023-11-19 08:04:14,007 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 08:04:14,008 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-11-19 08:04:14,009 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:04:14,009 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-11-19 08:04:14,010 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=366, Unknown=1, NotChecked=0, Total=462 [2023-11-19 08:04:14,522 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 89 out of 276 [2023-11-19 08:04:14,547 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 68 transitions, 662 flow. Second operand has 22 states, 22 states have (on average 90.95454545454545) internal successors, (2001), 22 states have internal predecessors, (2001), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:04:14,547 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 08:04:14,547 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 89 of 276 [2023-11-19 08:04:14,548 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 08:04:15,732 INFO L124 PetriNetUnfolderBase]: 377/722 cut-off events. [2023-11-19 08:04:15,732 INFO L125 PetriNetUnfolderBase]: For 2790/2790 co-relation queries the response was YES. [2023-11-19 08:04:15,735 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3529 conditions, 722 events. 377/722 cut-off events. For 2790/2790 co-relation queries the response was YES. Maximal size of possible extension queue 47. Compared 3320 event pairs, 91 based on Foata normal form. 46/721 useless extension candidates. Maximal degree in co-relation 2906. Up to 391 conditions per place. [2023-11-19 08:04:15,741 INFO L140 encePairwiseOnDemand]: 268/276 looper letters, 101 selfloop transitions, 34 changer transitions 4/139 dead transitions. [2023-11-19 08:04:15,742 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 139 transitions, 1343 flow [2023-11-19 08:04:15,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-11-19 08:04:15,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2023-11-19 08:04:15,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 1800 transitions. [2023-11-19 08:04:15,749 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34324942791762014 [2023-11-19 08:04:15,750 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 1800 transitions. [2023-11-19 08:04:15,750 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 1800 transitions. [2023-11-19 08:04:15,751 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 08:04:15,751 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 1800 transitions. [2023-11-19 08:04:15,756 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 94.73684210526316) internal successors, (1800), 19 states have internal predecessors, (1800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:04:15,766 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 276.0) internal successors, (5520), 20 states have internal predecessors, (5520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:04:15,768 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 276.0) internal successors, (5520), 20 states have internal predecessors, (5520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:04:15,768 INFO L175 Difference]: Start difference. First operand has 63 places, 68 transitions, 662 flow. Second operand 19 states and 1800 transitions. [2023-11-19 08:04:15,769 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 139 transitions, 1343 flow [2023-11-19 08:04:15,784 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 139 transitions, 1233 flow, removed 45 selfloop flow, removed 8 redundant places. [2023-11-19 08:04:15,787 INFO L231 Difference]: Finished difference. Result has 81 places, 77 transitions, 826 flow [2023-11-19 08:04:15,788 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=276, PETRI_DIFFERENCE_MINUEND_FLOW=564, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=826, PETRI_PLACES=81, PETRI_TRANSITIONS=77} [2023-11-19 08:04:15,788 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 60 predicate places. [2023-11-19 08:04:15,789 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 77 transitions, 826 flow [2023-11-19 08:04:15,790 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 90.95454545454545) internal successors, (2001), 22 states have internal predecessors, (2001), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:04:15,790 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 08:04:15,790 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 08:04:15,821 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44b9bca3-ea7d-46f5-b6bf-ab1e60e9cc05/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-19 08:04:16,005 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44b9bca3-ea7d-46f5-b6bf-ab1e60e9cc05/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2023-11-19 08:04:16,006 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-19 08:04:16,006 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:04:16,006 INFO L85 PathProgramCache]: Analyzing trace with hash -1095803632, now seen corresponding path program 5 times [2023-11-19 08:04:16,007 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:04:16,007 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [513604917] [2023-11-19 08:04:16,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:04:16,007 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:04:16,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:04:17,196 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 08:04:17,196 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:04:17,196 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [513604917] [2023-11-19 08:04:17,196 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [513604917] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 08:04:17,197 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [783749995] [2023-11-19 08:04:17,197 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-19 08:04:17,197 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:04:17,197 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44b9bca3-ea7d-46f5-b6bf-ab1e60e9cc05/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 08:04:17,202 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44b9bca3-ea7d-46f5-b6bf-ab1e60e9cc05/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 08:04:17,221 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44b9bca3-ea7d-46f5-b6bf-ab1e60e9cc05/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-19 08:04:17,320 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-11-19 08:04:17,320 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 08:04:17,322 INFO L262 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 22 conjunts are in the unsatisfiable core [2023-11-19 08:04:17,324 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 08:04:17,501 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 08:04:17,502 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 15 [2023-11-19 08:04:17,543 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-19 08:04:17,544 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 08:04:17,590 WARN L854 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_199 (Array Int Int))) (not (= 0 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_199) c_~q~0.base) (+ (* c_~q_front~0 4) c_~q~0.offset))))) is different from false [2023-11-19 08:04:17,607 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-19 08:04:17,608 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 37 [2023-11-19 08:04:17,613 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2023-11-19 08:04:17,708 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-19 08:04:17,709 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [783749995] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 08:04:17,709 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 08:04:17,709 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 5] total 19 [2023-11-19 08:04:17,709 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1106976691] [2023-11-19 08:04:17,709 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 08:04:17,709 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-11-19 08:04:17,710 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:04:17,710 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-11-19 08:04:17,711 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=292, Unknown=1, NotChecked=34, Total=380 [2023-11-19 08:04:17,768 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 89 out of 276 [2023-11-19 08:04:17,771 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 77 transitions, 826 flow. Second operand has 20 states, 20 states have (on average 91.4) internal successors, (1828), 20 states have internal predecessors, (1828), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:04:17,771 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 08:04:17,771 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 89 of 276 [2023-11-19 08:04:17,771 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 08:04:18,640 INFO L124 PetriNetUnfolderBase]: 430/796 cut-off events. [2023-11-19 08:04:18,640 INFO L125 PetriNetUnfolderBase]: For 5538/5538 co-relation queries the response was YES. [2023-11-19 08:04:18,644 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4320 conditions, 796 events. 430/796 cut-off events. For 5538/5538 co-relation queries the response was YES. Maximal size of possible extension queue 54. Compared 3651 event pairs, 83 based on Foata normal form. 20/789 useless extension candidates. Maximal degree in co-relation 3585. Up to 320 conditions per place. [2023-11-19 08:04:18,652 INFO L140 encePairwiseOnDemand]: 269/276 looper letters, 76 selfloop transitions, 38 changer transitions 0/114 dead transitions. [2023-11-19 08:04:18,653 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 114 transitions, 1318 flow [2023-11-19 08:04:18,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-19 08:04:18,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-11-19 08:04:18,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1127 transitions. [2023-11-19 08:04:18,658 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3402777777777778 [2023-11-19 08:04:18,659 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 1127 transitions. [2023-11-19 08:04:18,659 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 1127 transitions. [2023-11-19 08:04:18,660 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 08:04:18,660 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 1127 transitions. [2023-11-19 08:04:18,663 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 93.91666666666667) internal successors, (1127), 12 states have internal predecessors, (1127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:04:18,669 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 276.0) internal successors, (3588), 13 states have internal predecessors, (3588), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:04:18,671 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 276.0) internal successors, (3588), 13 states have internal predecessors, (3588), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:04:18,671 INFO L175 Difference]: Start difference. First operand has 81 places, 77 transitions, 826 flow. Second operand 12 states and 1127 transitions. [2023-11-19 08:04:18,671 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 114 transitions, 1318 flow [2023-11-19 08:04:18,709 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 114 transitions, 1168 flow, removed 47 selfloop flow, removed 13 redundant places. [2023-11-19 08:04:18,712 INFO L231 Difference]: Finished difference. Result has 80 places, 86 transitions, 917 flow [2023-11-19 08:04:18,713 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=276, PETRI_DIFFERENCE_MINUEND_FLOW=693, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=917, PETRI_PLACES=80, PETRI_TRANSITIONS=86} [2023-11-19 08:04:18,713 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 59 predicate places. [2023-11-19 08:04:18,714 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 86 transitions, 917 flow [2023-11-19 08:04:18,715 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 91.4) internal successors, (1828), 20 states have internal predecessors, (1828), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:04:18,715 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 08:04:18,715 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 08:04:18,741 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44b9bca3-ea7d-46f5-b6bf-ab1e60e9cc05/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-19 08:04:18,930 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44b9bca3-ea7d-46f5-b6bf-ab1e60e9cc05/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:04:18,931 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-19 08:04:18,931 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:04:18,931 INFO L85 PathProgramCache]: Analyzing trace with hash 1882915592, now seen corresponding path program 1 times [2023-11-19 08:04:18,931 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:04:18,931 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1758100845] [2023-11-19 08:04:18,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:04:18,932 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:04:18,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:04:19,607 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 08:04:19,607 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:04:19,607 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1758100845] [2023-11-19 08:04:19,608 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1758100845] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 08:04:19,608 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1029599247] [2023-11-19 08:04:19,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:04:19,608 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:04:19,608 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44b9bca3-ea7d-46f5-b6bf-ab1e60e9cc05/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 08:04:19,609 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44b9bca3-ea7d-46f5-b6bf-ab1e60e9cc05/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 08:04:19,625 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44b9bca3-ea7d-46f5-b6bf-ab1e60e9cc05/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-19 08:04:19,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:04:19,714 INFO L262 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 31 conjunts are in the unsatisfiable core [2023-11-19 08:04:19,716 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 08:04:20,151 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-11-19 08:04:20,151 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 10 [2023-11-19 08:04:20,185 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 08:04:20,185 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 08:04:20,356 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-19 08:04:20,357 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 20 [2023-11-19 08:04:20,731 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 08:04:20,731 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1029599247] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 08:04:20,731 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 08:04:20,731 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 24 [2023-11-19 08:04:20,731 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1684752159] [2023-11-19 08:04:20,731 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 08:04:20,732 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-11-19 08:04:20,732 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:04:20,733 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-11-19 08:04:20,733 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=560, Unknown=0, NotChecked=0, Total=650 [2023-11-19 08:04:22,110 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 96 out of 276 [2023-11-19 08:04:22,113 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 86 transitions, 917 flow. Second operand has 26 states, 26 states have (on average 98.0) internal successors, (2548), 26 states have internal predecessors, (2548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:04:22,114 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 08:04:22,114 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 96 of 276 [2023-11-19 08:04:22,114 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 08:04:24,514 INFO L124 PetriNetUnfolderBase]: 534/1031 cut-off events. [2023-11-19 08:04:24,514 INFO L125 PetriNetUnfolderBase]: For 5719/5719 co-relation queries the response was YES. [2023-11-19 08:04:24,521 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5380 conditions, 1031 events. 534/1031 cut-off events. For 5719/5719 co-relation queries the response was YES. Maximal size of possible extension queue 66. Compared 5296 event pairs, 71 based on Foata normal form. 11/1013 useless extension candidates. Maximal degree in co-relation 4352. Up to 572 conditions per place. [2023-11-19 08:04:24,531 INFO L140 encePairwiseOnDemand]: 266/276 looper letters, 123 selfloop transitions, 50 changer transitions 44/217 dead transitions. [2023-11-19 08:04:24,532 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 217 transitions, 2177 flow [2023-11-19 08:04:24,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-11-19 08:04:24,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2023-11-19 08:04:24,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 2841 transitions. [2023-11-19 08:04:24,546 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3676242236024845 [2023-11-19 08:04:24,547 INFO L72 ComplementDD]: Start complementDD. Operand 28 states and 2841 transitions. [2023-11-19 08:04:24,547 INFO L73 IsDeterministic]: Start isDeterministic. Operand 28 states and 2841 transitions. [2023-11-19 08:04:24,550 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 08:04:24,550 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 28 states and 2841 transitions. [2023-11-19 08:04:24,560 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 29 states, 28 states have (on average 101.46428571428571) internal successors, (2841), 28 states have internal predecessors, (2841), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:04:24,597 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 29 states, 29 states have (on average 276.0) internal successors, (8004), 29 states have internal predecessors, (8004), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:04:24,601 INFO L81 ComplementDD]: Finished complementDD. Result has 29 states, 29 states have (on average 276.0) internal successors, (8004), 29 states have internal predecessors, (8004), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:04:24,601 INFO L175 Difference]: Start difference. First operand has 80 places, 86 transitions, 917 flow. Second operand 28 states and 2841 transitions. [2023-11-19 08:04:24,601 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 107 places, 217 transitions, 2177 flow [2023-11-19 08:04:24,645 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 217 transitions, 2093 flow, removed 8 selfloop flow, removed 7 redundant places. [2023-11-19 08:04:24,656 INFO L231 Difference]: Finished difference. Result has 112 places, 105 transitions, 1285 flow [2023-11-19 08:04:24,657 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=276, PETRI_DIFFERENCE_MINUEND_FLOW=851, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=86, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=1285, PETRI_PLACES=112, PETRI_TRANSITIONS=105} [2023-11-19 08:04:24,658 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 91 predicate places. [2023-11-19 08:04:24,659 INFO L495 AbstractCegarLoop]: Abstraction has has 112 places, 105 transitions, 1285 flow [2023-11-19 08:04:24,660 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 98.0) internal successors, (2548), 26 states have internal predecessors, (2548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:04:24,660 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 08:04:24,660 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 08:04:24,690 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44b9bca3-ea7d-46f5-b6bf-ab1e60e9cc05/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-19 08:04:24,884 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44b9bca3-ea7d-46f5-b6bf-ab1e60e9cc05/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-11-19 08:04:24,884 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-19 08:04:24,885 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:04:24,885 INFO L85 PathProgramCache]: Analyzing trace with hash 744996596, now seen corresponding path program 2 times [2023-11-19 08:04:24,885 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:04:24,885 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [408050079] [2023-11-19 08:04:24,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:04:24,886 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:04:24,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:04:25,588 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 08:04:25,589 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:04:25,589 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [408050079] [2023-11-19 08:04:25,589 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [408050079] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 08:04:25,589 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [418390665] [2023-11-19 08:04:25,589 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-19 08:04:25,589 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:04:25,590 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44b9bca3-ea7d-46f5-b6bf-ab1e60e9cc05/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 08:04:25,594 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44b9bca3-ea7d-46f5-b6bf-ab1e60e9cc05/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 08:04:25,613 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44b9bca3-ea7d-46f5-b6bf-ab1e60e9cc05/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-19 08:04:25,715 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-19 08:04:25,715 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 08:04:25,717 INFO L262 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 30 conjunts are in the unsatisfiable core [2023-11-19 08:04:25,720 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 08:04:25,918 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-19 08:04:25,918 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 08:04:26,003 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-19 08:04:26,003 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 23 [2023-11-19 08:04:26,080 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-19 08:04:26,080 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [418390665] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 08:04:26,080 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 08:04:26,080 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 6, 5] total 18 [2023-11-19 08:04:26,081 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2031213330] [2023-11-19 08:04:26,081 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 08:04:26,082 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-11-19 08:04:26,084 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:04:26,085 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-11-19 08:04:26,085 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=329, Unknown=0, NotChecked=0, Total=380 [2023-11-19 08:04:26,995 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 97 out of 276 [2023-11-19 08:04:26,997 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 112 places, 105 transitions, 1285 flow. Second operand has 20 states, 20 states have (on average 99.2) internal successors, (1984), 20 states have internal predecessors, (1984), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:04:26,997 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 08:04:26,998 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 97 of 276 [2023-11-19 08:04:26,998 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 08:04:27,724 INFO L124 PetriNetUnfolderBase]: 492/960 cut-off events. [2023-11-19 08:04:27,725 INFO L125 PetriNetUnfolderBase]: For 6149/6149 co-relation queries the response was YES. [2023-11-19 08:04:27,732 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5423 conditions, 960 events. 492/960 cut-off events. For 6149/6149 co-relation queries the response was YES. Maximal size of possible extension queue 66. Compared 4901 event pairs, 99 based on Foata normal form. 2/946 useless extension candidates. Maximal degree in co-relation 5332. Up to 701 conditions per place. [2023-11-19 08:04:27,740 INFO L140 encePairwiseOnDemand]: 267/276 looper letters, 104 selfloop transitions, 34 changer transitions 15/153 dead transitions. [2023-11-19 08:04:27,740 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 124 places, 153 transitions, 1820 flow [2023-11-19 08:04:27,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-11-19 08:04:27,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-11-19 08:04:27,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 1735 transitions. [2023-11-19 08:04:27,749 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36977834612105714 [2023-11-19 08:04:27,749 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 1735 transitions. [2023-11-19 08:04:27,749 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 1735 transitions. [2023-11-19 08:04:27,750 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 08:04:27,750 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 1735 transitions. [2023-11-19 08:04:27,753 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 102.05882352941177) internal successors, (1735), 17 states have internal predecessors, (1735), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:04:27,761 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 276.0) internal successors, (4968), 18 states have internal predecessors, (4968), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:04:27,763 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 276.0) internal successors, (4968), 18 states have internal predecessors, (4968), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:04:27,763 INFO L175 Difference]: Start difference. First operand has 112 places, 105 transitions, 1285 flow. Second operand 17 states and 1735 transitions. [2023-11-19 08:04:27,763 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 124 places, 153 transitions, 1820 flow [2023-11-19 08:04:27,798 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 112 places, 153 transitions, 1678 flow, removed 53 selfloop flow, removed 12 redundant places. [2023-11-19 08:04:27,801 INFO L231 Difference]: Finished difference. Result has 116 places, 107 transitions, 1274 flow [2023-11-19 08:04:27,802 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=276, PETRI_DIFFERENCE_MINUEND_FLOW=1163, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=105, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=1274, PETRI_PLACES=116, PETRI_TRANSITIONS=107} [2023-11-19 08:04:27,803 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 95 predicate places. [2023-11-19 08:04:27,803 INFO L495 AbstractCegarLoop]: Abstraction has has 116 places, 107 transitions, 1274 flow [2023-11-19 08:04:27,804 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 99.2) internal successors, (1984), 20 states have internal predecessors, (1984), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:04:27,805 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 08:04:27,805 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 08:04:27,830 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44b9bca3-ea7d-46f5-b6bf-ab1e60e9cc05/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-11-19 08:04:28,025 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44b9bca3-ea7d-46f5-b6bf-ab1e60e9cc05/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-11-19 08:04:28,025 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-19 08:04:28,025 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:04:28,026 INFO L85 PathProgramCache]: Analyzing trace with hash 224349108, now seen corresponding path program 3 times [2023-11-19 08:04:28,026 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:04:28,026 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [116626880] [2023-11-19 08:04:28,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:04:28,026 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:04:28,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:04:28,779 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 08:04:28,779 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:04:28,779 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [116626880] [2023-11-19 08:04:28,779 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [116626880] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 08:04:28,779 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [95660461] [2023-11-19 08:04:28,779 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-19 08:04:28,780 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:04:28,780 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44b9bca3-ea7d-46f5-b6bf-ab1e60e9cc05/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 08:04:28,781 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44b9bca3-ea7d-46f5-b6bf-ab1e60e9cc05/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 08:04:28,805 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44b9bca3-ea7d-46f5-b6bf-ab1e60e9cc05/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-19 08:04:28,895 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-19 08:04:28,895 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 08:04:28,896 INFO L262 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 39 conjunts are in the unsatisfiable core [2023-11-19 08:04:28,899 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 08:04:29,182 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 08:04:29,183 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 16 [2023-11-19 08:04:29,333 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 08:04:29,333 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 08:04:29,513 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-19 08:04:29,514 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 50 treesize of output 42 [2023-11-19 08:04:29,557 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 7 [2023-11-19 08:04:29,938 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 08:04:29,938 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [95660461] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 08:04:29,939 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 08:04:29,939 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 27 [2023-11-19 08:04:29,939 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1137161725] [2023-11-19 08:04:29,939 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 08:04:29,940 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-11-19 08:04:29,940 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:04:29,941 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-11-19 08:04:29,941 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=711, Unknown=1, NotChecked=0, Total=812 [2023-11-19 08:04:31,415 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 77 out of 276 [2023-11-19 08:04:31,418 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 107 transitions, 1274 flow. Second operand has 29 states, 29 states have (on average 78.75862068965517) internal successors, (2284), 29 states have internal predecessors, (2284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:04:31,418 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 08:04:31,418 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 77 of 276 [2023-11-19 08:04:31,418 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 08:04:34,482 INFO L124 PetriNetUnfolderBase]: 524/1046 cut-off events. [2023-11-19 08:04:34,483 INFO L125 PetriNetUnfolderBase]: For 5968/5968 co-relation queries the response was YES. [2023-11-19 08:04:34,492 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5625 conditions, 1046 events. 524/1046 cut-off events. For 5968/5968 co-relation queries the response was YES. Maximal size of possible extension queue 70. Compared 5610 event pairs, 95 based on Foata normal form. 2/1032 useless extension candidates. Maximal degree in co-relation 5533. Up to 626 conditions per place. [2023-11-19 08:04:34,501 INFO L140 encePairwiseOnDemand]: 266/276 looper letters, 134 selfloop transitions, 61 changer transitions 20/215 dead transitions. [2023-11-19 08:04:34,502 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 144 places, 215 transitions, 2211 flow [2023-11-19 08:04:34,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2023-11-19 08:04:34,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2023-11-19 08:04:34,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 2542 transitions. [2023-11-19 08:04:34,509 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2971014492753623 [2023-11-19 08:04:34,509 INFO L72 ComplementDD]: Start complementDD. Operand 31 states and 2542 transitions. [2023-11-19 08:04:34,510 INFO L73 IsDeterministic]: Start isDeterministic. Operand 31 states and 2542 transitions. [2023-11-19 08:04:34,511 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 08:04:34,511 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 31 states and 2542 transitions. [2023-11-19 08:04:34,516 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 32 states, 31 states have (on average 82.0) internal successors, (2542), 31 states have internal predecessors, (2542), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:04:34,529 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 32 states, 32 states have (on average 276.0) internal successors, (8832), 32 states have internal predecessors, (8832), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:04:34,532 INFO L81 ComplementDD]: Finished complementDD. Result has 32 states, 32 states have (on average 276.0) internal successors, (8832), 32 states have internal predecessors, (8832), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:04:34,532 INFO L175 Difference]: Start difference. First operand has 116 places, 107 transitions, 1274 flow. Second operand 31 states and 2542 transitions. [2023-11-19 08:04:34,532 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 144 places, 215 transitions, 2211 flow [2023-11-19 08:04:34,562 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 130 places, 215 transitions, 2129 flow, removed 8 selfloop flow, removed 14 redundant places. [2023-11-19 08:04:34,567 INFO L231 Difference]: Finished difference. Result has 135 places, 115 transitions, 1464 flow [2023-11-19 08:04:34,567 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=276, PETRI_DIFFERENCE_MINUEND_FLOW=1200, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=107, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=1464, PETRI_PLACES=135, PETRI_TRANSITIONS=115} [2023-11-19 08:04:34,568 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 114 predicate places. [2023-11-19 08:04:34,568 INFO L495 AbstractCegarLoop]: Abstraction has has 135 places, 115 transitions, 1464 flow [2023-11-19 08:04:34,569 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 78.75862068965517) internal successors, (2284), 29 states have internal predecessors, (2284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:04:34,569 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 08:04:34,569 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 08:04:34,598 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44b9bca3-ea7d-46f5-b6bf-ab1e60e9cc05/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-11-19 08:04:34,782 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44b9bca3-ea7d-46f5-b6bf-ab1e60e9cc05/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:04:34,783 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-19 08:04:34,783 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:04:34,783 INFO L85 PathProgramCache]: Analyzing trace with hash -1685215500, now seen corresponding path program 4 times [2023-11-19 08:04:34,783 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:04:34,784 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1562086842] [2023-11-19 08:04:34,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:04:34,784 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:04:34,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:04:35,559 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 08:04:35,560 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:04:35,560 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1562086842] [2023-11-19 08:04:35,560 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1562086842] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 08:04:35,560 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1536106720] [2023-11-19 08:04:35,560 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-19 08:04:35,560 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:04:35,561 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44b9bca3-ea7d-46f5-b6bf-ab1e60e9cc05/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 08:04:35,562 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44b9bca3-ea7d-46f5-b6bf-ab1e60e9cc05/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 08:04:35,581 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44b9bca3-ea7d-46f5-b6bf-ab1e60e9cc05/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-19 08:04:35,702 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-19 08:04:35,702 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 08:04:35,705 INFO L262 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 38 conjunts are in the unsatisfiable core [2023-11-19 08:04:35,707 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 08:04:35,988 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 08:04:35,989 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 15 [2023-11-19 08:04:36,109 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2023-11-19 08:04:36,179 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 08:04:36,179 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 08:04:36,429 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-19 08:04:36,429 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 79 treesize of output 63 [2023-11-19 08:04:36,437 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 19 [2023-11-19 08:04:36,844 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 08:04:36,844 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1536106720] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 08:04:36,845 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 08:04:36,845 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 27 [2023-11-19 08:04:36,845 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [947477754] [2023-11-19 08:04:36,845 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 08:04:36,846 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-11-19 08:04:36,846 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:04:36,847 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-11-19 08:04:36,847 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=705, Unknown=2, NotChecked=0, Total=812 [2023-11-19 08:04:38,610 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 77 out of 276 [2023-11-19 08:04:38,612 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 135 places, 115 transitions, 1464 flow. Second operand has 29 states, 29 states have (on average 78.79310344827586) internal successors, (2285), 29 states have internal predecessors, (2285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:04:38,612 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 08:04:38,612 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 77 of 276 [2023-11-19 08:04:38,613 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand