./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/weaver/popl20-nonblocking-cntr.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version cf1a7837 Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bbb65a9-ccc3-4197-8c4a-9f5cc53eb504/bin/uautomizer-verify-uTZkv6EMXl/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bbb65a9-ccc3-4197-8c4a-9f5cc53eb504/bin/uautomizer-verify-uTZkv6EMXl/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bbb65a9-ccc3-4197-8c4a-9f5cc53eb504/bin/uautomizer-verify-uTZkv6EMXl/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bbb65a9-ccc3-4197-8c4a-9f5cc53eb504/bin/uautomizer-verify-uTZkv6EMXl/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/popl20-nonblocking-cntr.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bbb65a9-ccc3-4197-8c4a-9f5cc53eb504/bin/uautomizer-verify-uTZkv6EMXl/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bbb65a9-ccc3-4197-8c4a-9f5cc53eb504/bin/uautomizer-verify-uTZkv6EMXl --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash fe7fc3189e39cd6587b4d7d83621bd29f6e1c085e1b3af197b9abc1746b629ea --- Real Ultimate output --- This is Ultimate 0.2.3-dev-cf1a783 [2023-11-12 02:30:48,285 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-12 02:30:48,432 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bbb65a9-ccc3-4197-8c4a-9f5cc53eb504/bin/uautomizer-verify-uTZkv6EMXl/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-12 02:30:48,442 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-12 02:30:48,443 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-12 02:30:48,489 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-12 02:30:48,490 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-12 02:30:48,491 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-12 02:30:48,492 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-12 02:30:48,497 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-12 02:30:48,499 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-12 02:30:48,500 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-12 02:30:48,501 INFO L153 SettingsManager]: * Use SBE=true [2023-11-12 02:30:48,503 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-12 02:30:48,503 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-12 02:30:48,504 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-12 02:30:48,504 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-12 02:30:48,505 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-12 02:30:48,505 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-12 02:30:48,505 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-12 02:30:48,506 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-12 02:30:48,507 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-12 02:30:48,507 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-12 02:30:48,508 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-12 02:30:48,508 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-12 02:30:48,509 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-12 02:30:48,510 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-12 02:30:48,510 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-12 02:30:48,510 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-12 02:30:48,511 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-12 02:30:48,513 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-12 02:30:48,513 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-12 02:30:48,513 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-12 02:30:48,513 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-12 02:30:48,514 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-12 02:30:48,514 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-12 02:30:48,514 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-12 02:30:48,515 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-12 02:30:48,515 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-12 02:30:48,515 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_6bbb65a9-ccc3-4197-8c4a-9f5cc53eb504/bin/uautomizer-verify-uTZkv6EMXl/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bbb65a9-ccc3-4197-8c4a-9f5cc53eb504/bin/uautomizer-verify-uTZkv6EMXl Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> fe7fc3189e39cd6587b4d7d83621bd29f6e1c085e1b3af197b9abc1746b629ea [2023-11-12 02:30:48,890 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-12 02:30:48,929 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-12 02:30:48,932 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-12 02:30:48,934 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-12 02:30:48,935 INFO L274 PluginConnector]: CDTParser initialized [2023-11-12 02:30:48,937 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bbb65a9-ccc3-4197-8c4a-9f5cc53eb504/bin/uautomizer-verify-uTZkv6EMXl/../../sv-benchmarks/c/weaver/popl20-nonblocking-cntr.wvr.c [2023-11-12 02:30:52,296 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-12 02:30:52,638 INFO L384 CDTParser]: Found 1 translation units. [2023-11-12 02:30:52,639 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bbb65a9-ccc3-4197-8c4a-9f5cc53eb504/sv-benchmarks/c/weaver/popl20-nonblocking-cntr.wvr.c [2023-11-12 02:30:52,652 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bbb65a9-ccc3-4197-8c4a-9f5cc53eb504/bin/uautomizer-verify-uTZkv6EMXl/data/b91e992b8/31cc3e38afa8462b9905beaf3e36e12e/FLAGb6a1b8840 [2023-11-12 02:30:52,673 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bbb65a9-ccc3-4197-8c4a-9f5cc53eb504/bin/uautomizer-verify-uTZkv6EMXl/data/b91e992b8/31cc3e38afa8462b9905beaf3e36e12e [2023-11-12 02:30:52,682 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-12 02:30:52,685 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-12 02:30:52,689 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-12 02:30:52,689 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-12 02:30:52,695 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-12 02:30:52,696 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 02:30:52" (1/1) ... [2023-11-12 02:30:52,698 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@fdebfa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:30:52, skipping insertion in model container [2023-11-12 02:30:52,698 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 02:30:52" (1/1) ... [2023-11-12 02:30:52,735 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-12 02:30:52,959 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_6bbb65a9-ccc3-4197-8c4a-9f5cc53eb504/sv-benchmarks/c/weaver/popl20-nonblocking-cntr.wvr.c[2063,2076] [2023-11-12 02:30:52,965 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-12 02:30:52,978 INFO L202 MainTranslator]: Completed pre-run [2023-11-12 02:30:53,004 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_6bbb65a9-ccc3-4197-8c4a-9f5cc53eb504/sv-benchmarks/c/weaver/popl20-nonblocking-cntr.wvr.c[2063,2076] [2023-11-12 02:30:53,006 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-12 02:30:53,016 WARN L672 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-11-12 02:30:53,016 WARN L672 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-11-12 02:30:53,026 INFO L206 MainTranslator]: Completed translation [2023-11-12 02:30:53,027 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:30:53 WrapperNode [2023-11-12 02:30:53,027 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-12 02:30:53,028 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-12 02:30:53,029 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-12 02:30:53,029 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-12 02:30:53,039 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:30:53" (1/1) ... [2023-11-12 02:30:53,048 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:30:53" (1/1) ... [2023-11-12 02:30:53,073 INFO L138 Inliner]: procedures = 21, calls = 24, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 53 [2023-11-12 02:30:53,074 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-12 02:30:53,075 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-12 02:30:53,075 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-12 02:30:53,075 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-12 02:30:53,086 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:30:53" (1/1) ... [2023-11-12 02:30:53,086 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:30:53" (1/1) ... [2023-11-12 02:30:53,089 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:30:53" (1/1) ... [2023-11-12 02:30:53,089 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:30:53" (1/1) ... [2023-11-12 02:30:53,096 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:30:53" (1/1) ... [2023-11-12 02:30:53,100 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:30:53" (1/1) ... [2023-11-12 02:30:53,102 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:30:53" (1/1) ... [2023-11-12 02:30:53,104 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:30:53" (1/1) ... [2023-11-12 02:30:53,107 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-12 02:30:53,108 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-12 02:30:53,108 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-12 02:30:53,108 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-12 02:30:53,109 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:30:53" (1/1) ... [2023-11-12 02:30:53,120 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-12 02:30:53,140 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bbb65a9-ccc3-4197-8c4a-9f5cc53eb504/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:30:53,156 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bbb65a9-ccc3-4197-8c4a-9f5cc53eb504/bin/uautomizer-verify-uTZkv6EMXl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-12 02:30:53,162 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bbb65a9-ccc3-4197-8c4a-9f5cc53eb504/bin/uautomizer-verify-uTZkv6EMXl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-12 02:30:53,210 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-12 02:30:53,211 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-11-12 02:30:53,211 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-11-12 02:30:53,211 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-11-12 02:30:53,211 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-11-12 02:30:53,212 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-12 02:30:53,212 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-12 02:30:53,212 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-12 02:30:53,212 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-11-12 02:30:53,213 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-11-12 02:30:53,213 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-12 02:30:53,215 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-12 02:30:53,216 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-12 02:30:53,217 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-12 02:30:53,218 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-12 02:30:53,388 INFO L236 CfgBuilder]: Building ICFG [2023-11-12 02:30:53,393 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-12 02:30:53,685 INFO L277 CfgBuilder]: Performing block encoding [2023-11-12 02:30:53,749 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-12 02:30:53,749 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-11-12 02:30:53,753 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 02:30:53 BoogieIcfgContainer [2023-11-12 02:30:53,753 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-12 02:30:53,757 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-12 02:30:53,758 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-12 02:30:53,762 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-12 02:30:53,762 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.11 02:30:52" (1/3) ... [2023-11-12 02:30:53,763 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@240e8928 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 02:30:53, skipping insertion in model container [2023-11-12 02:30:53,763 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:30:53" (2/3) ... [2023-11-12 02:30:53,765 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@240e8928 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 02:30:53, skipping insertion in model container [2023-11-12 02:30:53,765 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 02:30:53" (3/3) ... [2023-11-12 02:30:53,766 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-nonblocking-cntr.wvr.c [2023-11-12 02:30:53,776 WARN L146 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-11-12 02:30:53,789 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-12 02:30:53,789 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-12 02:30:53,789 INFO L521 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-12 02:30:53,892 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-11-12 02:30:53,956 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 83 places, 82 transitions, 178 flow [2023-11-12 02:30:54,046 INFO L124 PetriNetUnfolderBase]: 6/80 cut-off events. [2023-11-12 02:30:54,047 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-12 02:30:54,056 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89 conditions, 80 events. 6/80 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 52 event pairs, 0 based on Foata normal form. 0/73 useless extension candidates. Maximal degree in co-relation 47. Up to 2 conditions per place. [2023-11-12 02:30:54,056 INFO L82 GeneralOperation]: Start removeDead. Operand has 83 places, 82 transitions, 178 flow [2023-11-12 02:30:54,063 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 72 places, 71 transitions, 154 flow [2023-11-12 02:30:54,067 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-11-12 02:30:54,089 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 72 places, 71 transitions, 154 flow [2023-11-12 02:30:54,094 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 72 places, 71 transitions, 154 flow [2023-11-12 02:30:54,095 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 72 places, 71 transitions, 154 flow [2023-11-12 02:30:54,204 INFO L124 PetriNetUnfolderBase]: 6/71 cut-off events. [2023-11-12 02:30:54,204 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-12 02:30:54,205 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80 conditions, 71 events. 6/71 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 51 event pairs, 0 based on Foata normal form. 0/65 useless extension candidates. Maximal degree in co-relation 47. Up to 2 conditions per place. [2023-11-12 02:30:54,206 INFO L119 LiptonReduction]: Number of co-enabled transitions 504 [2023-11-12 02:30:57,481 INFO L134 LiptonReduction]: Checked pairs total: 518 [2023-11-12 02:30:57,481 INFO L136 LiptonReduction]: Total number of compositions: 68 [2023-11-12 02:30:57,497 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-12 02:30:57,503 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;@70f3c761, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-12 02:30:57,503 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-11-12 02:30:57,510 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-12 02:30:57,511 INFO L124 PetriNetUnfolderBase]: 2/14 cut-off events. [2023-11-12 02:30:57,511 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-12 02:30:57,511 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:30:57,512 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:30:57,512 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-12 02:30:57,518 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:30:57,518 INFO L85 PathProgramCache]: Analyzing trace with hash -1615436439, now seen corresponding path program 1 times [2023-11-12 02:30:57,529 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:30:57,530 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [951304280] [2023-11-12 02:30:57,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:30:57,530 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:30:57,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:30:57,897 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:30:57,897 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:30:57,898 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [951304280] [2023-11-12 02:30:57,898 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [951304280] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:30:57,899 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:30:57,899 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-12 02:30:57,901 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1504990751] [2023-11-12 02:30:57,902 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:30:57,911 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-12 02:30:57,919 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:30:57,944 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-12 02:30:57,945 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-12 02:30:57,991 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 67 out of 150 [2023-11-12 02:30:57,998 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 20 places, 15 transitions, 42 flow. Second operand has 4 states, 4 states have (on average 70.25) internal successors, (281), 4 states have internal predecessors, (281), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:30:57,998 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:30:57,999 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 67 of 150 [2023-11-12 02:30:58,000 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:30:58,102 INFO L124 PetriNetUnfolderBase]: 51/92 cut-off events. [2023-11-12 02:30:58,102 INFO L125 PetriNetUnfolderBase]: For 11/11 co-relation queries the response was YES. [2023-11-12 02:30:58,104 INFO L83 FinitePrefix]: Finished finitePrefix Result has 201 conditions, 92 events. 51/92 cut-off events. For 11/11 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 199 event pairs, 24 based on Foata normal form. 0/74 useless extension candidates. Maximal degree in co-relation 150. Up to 73 conditions per place. [2023-11-12 02:30:58,106 INFO L140 encePairwiseOnDemand]: 146/150 looper letters, 19 selfloop transitions, 3 changer transitions 0/22 dead transitions. [2023-11-12 02:30:58,106 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 23 places, 22 transitions, 103 flow [2023-11-12 02:30:58,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-12 02:30:58,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-12 02:30:58,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 291 transitions. [2023-11-12 02:30:58,126 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.485 [2023-11-12 02:30:58,127 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 291 transitions. [2023-11-12 02:30:58,128 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 291 transitions. [2023-11-12 02:30:58,130 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:30:58,132 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 291 transitions. [2023-11-12 02:30:58,143 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 72.75) internal successors, (291), 4 states have internal predecessors, (291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:30:58,150 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 150.0) internal successors, (750), 5 states have internal predecessors, (750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:30:58,152 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 150.0) internal successors, (750), 5 states have internal predecessors, (750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:30:58,154 INFO L175 Difference]: Start difference. First operand has 20 places, 15 transitions, 42 flow. Second operand 4 states and 291 transitions. [2023-11-12 02:30:58,156 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 23 places, 22 transitions, 103 flow [2023-11-12 02:30:58,158 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 19 places, 22 transitions, 93 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-11-12 02:30:58,160 INFO L231 Difference]: Finished difference. Result has 20 places, 16 transitions, 48 flow [2023-11-12 02:30:58,162 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=150, PETRI_DIFFERENCE_MINUEND_FLOW=34, PETRI_DIFFERENCE_MINUEND_PLACES=16, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=15, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=12, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=48, PETRI_PLACES=20, PETRI_TRANSITIONS=16} [2023-11-12 02:30:58,166 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 0 predicate places. [2023-11-12 02:30:58,167 INFO L495 AbstractCegarLoop]: Abstraction has has 20 places, 16 transitions, 48 flow [2023-11-12 02:30:58,167 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 70.25) internal successors, (281), 4 states have internal predecessors, (281), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:30:58,167 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:30:58,167 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:30:58,168 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-12 02:30:58,168 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-12 02:30:58,168 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:30:58,169 INFO L85 PathProgramCache]: Analyzing trace with hash 867191396, now seen corresponding path program 1 times [2023-11-12 02:30:58,169 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:30:58,169 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1046885041] [2023-11-12 02:30:58,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:30:58,169 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:30:58,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:30:58,366 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-12 02:30:58,366 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:30:58,367 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1046885041] [2023-11-12 02:30:58,367 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1046885041] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:30:58,367 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:30:58,367 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-12 02:30:58,368 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1285673408] [2023-11-12 02:30:58,368 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:30:58,369 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-12 02:30:58,370 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:30:58,371 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-12 02:30:58,371 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-12 02:30:58,406 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 150 [2023-11-12 02:30:58,407 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 20 places, 16 transitions, 48 flow. Second operand has 4 states, 4 states have (on average 68.5) internal successors, (274), 4 states have internal predecessors, (274), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:30:58,407 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:30:58,407 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 150 [2023-11-12 02:30:58,408 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:30:58,480 INFO L124 PetriNetUnfolderBase]: 65/116 cut-off events. [2023-11-12 02:30:58,481 INFO L125 PetriNetUnfolderBase]: For 40/40 co-relation queries the response was YES. [2023-11-12 02:30:58,482 INFO L83 FinitePrefix]: Finished finitePrefix Result has 292 conditions, 116 events. 65/116 cut-off events. For 40/40 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 267 event pairs, 33 based on Foata normal form. 0/96 useless extension candidates. Maximal degree in co-relation 70. Up to 92 conditions per place. [2023-11-12 02:30:58,484 INFO L140 encePairwiseOnDemand]: 146/150 looper letters, 21 selfloop transitions, 3 changer transitions 0/24 dead transitions. [2023-11-12 02:30:58,485 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 23 places, 24 transitions, 123 flow [2023-11-12 02:30:58,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-12 02:30:58,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-12 02:30:58,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 283 transitions. [2023-11-12 02:30:58,492 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4716666666666667 [2023-11-12 02:30:58,493 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 283 transitions. [2023-11-12 02:30:58,493 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 283 transitions. [2023-11-12 02:30:58,493 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:30:58,494 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 283 transitions. [2023-11-12 02:30:58,496 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 70.75) internal successors, (283), 4 states have internal predecessors, (283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:30:58,503 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 150.0) internal successors, (750), 5 states have internal predecessors, (750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:30:58,504 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 150.0) internal successors, (750), 5 states have internal predecessors, (750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:30:58,504 INFO L175 Difference]: Start difference. First operand has 20 places, 16 transitions, 48 flow. Second operand 4 states and 283 transitions. [2023-11-12 02:30:58,505 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 23 places, 24 transitions, 123 flow [2023-11-12 02:30:58,506 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 21 places, 24 transitions, 113 flow, removed 2 selfloop flow, removed 2 redundant places. [2023-11-12 02:30:58,507 INFO L231 Difference]: Finished difference. Result has 22 places, 17 transitions, 56 flow [2023-11-12 02:30:58,508 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=150, PETRI_DIFFERENCE_MINUEND_FLOW=42, PETRI_DIFFERENCE_MINUEND_PLACES=18, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=16, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=13, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=56, PETRI_PLACES=22, PETRI_TRANSITIONS=17} [2023-11-12 02:30:58,509 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 2 predicate places. [2023-11-12 02:30:58,510 INFO L495 AbstractCegarLoop]: Abstraction has has 22 places, 17 transitions, 56 flow [2023-11-12 02:30:58,517 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 68.5) internal successors, (274), 4 states have internal predecessors, (274), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:30:58,517 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:30:58,517 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:30:58,518 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-12 02:30:58,518 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-12 02:30:58,521 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:30:58,521 INFO L85 PathProgramCache]: Analyzing trace with hash -1224454948, now seen corresponding path program 1 times [2023-11-12 02:30:58,521 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:30:58,522 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2131656474] [2023-11-12 02:30:58,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:30:58,524 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:30:58,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:30:58,729 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:30:58,729 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:30:58,729 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2131656474] [2023-11-12 02:30:58,730 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2131656474] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:30:58,730 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1620547346] [2023-11-12 02:30:58,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:30:58,730 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:30:58,731 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bbb65a9-ccc3-4197-8c4a-9f5cc53eb504/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:30:58,734 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bbb65a9-ccc3-4197-8c4a-9f5cc53eb504/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:30:58,748 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bbb65a9-ccc3-4197-8c4a-9f5cc53eb504/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-12 02:30:58,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:30:58,847 INFO L262 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-12 02:30:58,852 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:30:58,901 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:30:58,901 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:30:59,178 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:30:59,179 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1620547346] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 02:30:59,179 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 02:30:59,188 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 3] total 4 [2023-11-12 02:30:59,188 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1203139816] [2023-11-12 02:30:59,189 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 02:30:59,189 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-12 02:30:59,190 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:30:59,191 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-12 02:30:59,191 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-11-12 02:30:59,202 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 70 out of 150 [2023-11-12 02:30:59,203 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 22 places, 17 transitions, 56 flow. Second operand has 6 states, 6 states have (on average 74.16666666666667) internal successors, (445), 6 states have internal predecessors, (445), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:30:59,203 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:30:59,203 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 70 of 150 [2023-11-12 02:30:59,204 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:30:59,328 INFO L124 PetriNetUnfolderBase]: 117/211 cut-off events. [2023-11-12 02:30:59,329 INFO L125 PetriNetUnfolderBase]: For 68/68 co-relation queries the response was YES. [2023-11-12 02:30:59,330 INFO L83 FinitePrefix]: Finished finitePrefix Result has 573 conditions, 211 events. 117/211 cut-off events. For 68/68 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 653 event pairs, 19 based on Foata normal form. 1/166 useless extension candidates. Maximal degree in co-relation 143. Up to 77 conditions per place. [2023-11-12 02:30:59,336 INFO L140 encePairwiseOnDemand]: 146/150 looper letters, 32 selfloop transitions, 6 changer transitions 4/42 dead transitions. [2023-11-12 02:30:59,336 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 25 places, 42 transitions, 216 flow [2023-11-12 02:30:59,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-12 02:30:59,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-12 02:30:59,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 319 transitions. [2023-11-12 02:30:59,340 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5316666666666666 [2023-11-12 02:30:59,340 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 319 transitions. [2023-11-12 02:30:59,340 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 319 transitions. [2023-11-12 02:30:59,341 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:30:59,341 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 319 transitions. [2023-11-12 02:30:59,342 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 79.75) internal successors, (319), 4 states have internal predecessors, (319), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:30:59,344 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 150.0) internal successors, (750), 5 states have internal predecessors, (750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:30:59,345 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 150.0) internal successors, (750), 5 states have internal predecessors, (750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:30:59,345 INFO L175 Difference]: Start difference. First operand has 22 places, 17 transitions, 56 flow. Second operand 4 states and 319 transitions. [2023-11-12 02:30:59,345 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 25 places, 42 transitions, 216 flow [2023-11-12 02:30:59,347 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 23 places, 42 transitions, 210 flow, removed 1 selfloop flow, removed 2 redundant places. [2023-11-12 02:30:59,348 INFO L231 Difference]: Finished difference. Result has 25 places, 21 transitions, 94 flow [2023-11-12 02:30:59,348 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=150, PETRI_DIFFERENCE_MINUEND_FLOW=50, PETRI_DIFFERENCE_MINUEND_PLACES=20, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=17, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=12, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=94, PETRI_PLACES=25, PETRI_TRANSITIONS=21} [2023-11-12 02:30:59,350 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 5 predicate places. [2023-11-12 02:30:59,350 INFO L495 AbstractCegarLoop]: Abstraction has has 25 places, 21 transitions, 94 flow [2023-11-12 02:30:59,351 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 74.16666666666667) internal successors, (445), 6 states have internal predecessors, (445), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:30:59,351 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:30:59,351 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:30:59,364 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bbb65a9-ccc3-4197-8c4a-9f5cc53eb504/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-12 02:30:59,563 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bbb65a9-ccc3-4197-8c4a-9f5cc53eb504/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:30:59,564 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-12 02:30:59,564 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:30:59,564 INFO L85 PathProgramCache]: Analyzing trace with hash 652247046, now seen corresponding path program 2 times [2023-11-12 02:30:59,565 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:30:59,565 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [108431971] [2023-11-12 02:30:59,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:30:59,565 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:30:59,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:30:59,695 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-12 02:30:59,696 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:30:59,696 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [108431971] [2023-11-12 02:30:59,696 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [108431971] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:30:59,696 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1825000420] [2023-11-12 02:30:59,697 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-12 02:30:59,697 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:30:59,697 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bbb65a9-ccc3-4197-8c4a-9f5cc53eb504/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:30:59,698 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bbb65a9-ccc3-4197-8c4a-9f5cc53eb504/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:30:59,719 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bbb65a9-ccc3-4197-8c4a-9f5cc53eb504/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-12 02:30:59,807 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-12 02:30:59,810 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-12 02:30:59,811 INFO L262 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-12 02:30:59,813 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:30:59,886 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-12 02:30:59,886 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:31:00,099 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-12 02:31:00,099 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1825000420] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 02:31:00,099 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 02:31:00,099 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 9 [2023-11-12 02:31:00,100 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1519435746] [2023-11-12 02:31:00,100 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 02:31:00,100 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-12 02:31:00,101 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:31:00,101 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-12 02:31:00,102 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2023-11-12 02:31:00,180 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 150 [2023-11-12 02:31:00,181 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 25 places, 21 transitions, 94 flow. Second operand has 10 states, 10 states have (on average 67.7) internal successors, (677), 10 states have internal predecessors, (677), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:31:00,181 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:31:00,181 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 150 [2023-11-12 02:31:00,182 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:31:00,343 INFO L124 PetriNetUnfolderBase]: 143/257 cut-off events. [2023-11-12 02:31:00,343 INFO L125 PetriNetUnfolderBase]: For 226/226 co-relation queries the response was YES. [2023-11-12 02:31:00,347 INFO L83 FinitePrefix]: Finished finitePrefix Result has 823 conditions, 257 events. 143/257 cut-off events. For 226/226 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 807 event pairs, 35 based on Foata normal form. 16/273 useless extension candidates. Maximal degree in co-relation 230. Up to 190 conditions per place. [2023-11-12 02:31:00,349 INFO L140 encePairwiseOnDemand]: 145/150 looper letters, 32 selfloop transitions, 8 changer transitions 0/40 dead transitions. [2023-11-12 02:31:00,349 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 29 places, 40 transitions, 255 flow [2023-11-12 02:31:00,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-12 02:31:00,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-12 02:31:00,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 357 transitions. [2023-11-12 02:31:00,352 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.476 [2023-11-12 02:31:00,356 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 357 transitions. [2023-11-12 02:31:00,356 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 357 transitions. [2023-11-12 02:31:00,356 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:31:00,357 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 357 transitions. [2023-11-12 02:31:00,358 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 71.4) internal successors, (357), 5 states have internal predecessors, (357), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:31:00,360 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 150.0) internal successors, (900), 6 states have internal predecessors, (900), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:31:00,361 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 150.0) internal successors, (900), 6 states have internal predecessors, (900), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:31:00,361 INFO L175 Difference]: Start difference. First operand has 25 places, 21 transitions, 94 flow. Second operand 5 states and 357 transitions. [2023-11-12 02:31:00,361 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 29 places, 40 transitions, 255 flow [2023-11-12 02:31:00,366 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 29 places, 40 transitions, 255 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-12 02:31:00,367 INFO L231 Difference]: Finished difference. Result has 32 places, 27 transitions, 168 flow [2023-11-12 02:31:00,367 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=150, PETRI_DIFFERENCE_MINUEND_FLOW=94, PETRI_DIFFERENCE_MINUEND_PLACES=25, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=21, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=168, PETRI_PLACES=32, PETRI_TRANSITIONS=27} [2023-11-12 02:31:00,369 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 12 predicate places. [2023-11-12 02:31:00,369 INFO L495 AbstractCegarLoop]: Abstraction has has 32 places, 27 transitions, 168 flow [2023-11-12 02:31:00,370 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 67.7) internal successors, (677), 10 states have internal predecessors, (677), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:31:00,370 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:31:00,371 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:31:00,389 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bbb65a9-ccc3-4197-8c4a-9f5cc53eb504/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-12 02:31:00,589 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bbb65a9-ccc3-4197-8c4a-9f5cc53eb504/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:31:00,590 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-12 02:31:00,590 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:31:00,590 INFO L85 PathProgramCache]: Analyzing trace with hash 1644368708, now seen corresponding path program 3 times [2023-11-12 02:31:00,590 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:31:00,590 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1891525087] [2023-11-12 02:31:00,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:31:00,591 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:31:00,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:31:00,804 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:31:00,804 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:31:00,805 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1891525087] [2023-11-12 02:31:00,805 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1891525087] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:31:00,805 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1814970739] [2023-11-12 02:31:00,806 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-12 02:31:00,806 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:31:00,806 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bbb65a9-ccc3-4197-8c4a-9f5cc53eb504/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:31:00,807 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bbb65a9-ccc3-4197-8c4a-9f5cc53eb504/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:31:00,827 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bbb65a9-ccc3-4197-8c4a-9f5cc53eb504/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-12 02:31:00,894 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-12 02:31:00,894 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-12 02:31:00,895 INFO L262 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-12 02:31:00,897 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:31:00,978 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:31:00,978 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:31:01,145 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:31:01,145 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1814970739] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 02:31:01,145 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 02:31:01,146 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2023-11-12 02:31:01,146 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1156716176] [2023-11-12 02:31:01,146 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 02:31:01,147 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-12 02:31:01,147 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:31:01,148 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-12 02:31:01,148 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2023-11-12 02:31:01,319 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 150 [2023-11-12 02:31:01,321 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 27 transitions, 168 flow. Second operand has 15 states, 15 states have (on average 62.4) internal successors, (936), 15 states have internal predecessors, (936), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:31:01,321 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:31:01,321 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 150 [2023-11-12 02:31:01,321 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:31:02,078 INFO L124 PetriNetUnfolderBase]: 231/410 cut-off events. [2023-11-12 02:31:02,078 INFO L125 PetriNetUnfolderBase]: For 747/747 co-relation queries the response was YES. [2023-11-12 02:31:02,080 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1573 conditions, 410 events. 231/410 cut-off events. For 747/747 co-relation queries the response was YES. Maximal size of possible extension queue 34. Compared 1556 event pairs, 15 based on Foata normal form. 12/422 useless extension candidates. Maximal degree in co-relation 749. Up to 143 conditions per place. [2023-11-12 02:31:02,084 INFO L140 encePairwiseOnDemand]: 143/150 looper letters, 63 selfloop transitions, 53 changer transitions 20/136 dead transitions. [2023-11-12 02:31:02,084 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 136 transitions, 978 flow [2023-11-12 02:31:02,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-11-12 02:31:02,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2023-11-12 02:31:02,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 1624 transitions. [2023-11-12 02:31:02,092 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43306666666666666 [2023-11-12 02:31:02,092 INFO L72 ComplementDD]: Start complementDD. Operand 25 states and 1624 transitions. [2023-11-12 02:31:02,092 INFO L73 IsDeterministic]: Start isDeterministic. Operand 25 states and 1624 transitions. [2023-11-12 02:31:02,094 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:31:02,094 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 25 states and 1624 transitions. [2023-11-12 02:31:02,100 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 26 states, 25 states have (on average 64.96) internal successors, (1624), 25 states have internal predecessors, (1624), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:31:02,109 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 26 states, 26 states have (on average 150.0) internal successors, (3900), 26 states have internal predecessors, (3900), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:31:02,112 INFO L81 ComplementDD]: Finished complementDD. Result has 26 states, 26 states have (on average 150.0) internal successors, (3900), 26 states have internal predecessors, (3900), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:31:02,112 INFO L175 Difference]: Start difference. First operand has 32 places, 27 transitions, 168 flow. Second operand 25 states and 1624 transitions. [2023-11-12 02:31:02,112 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 136 transitions, 978 flow [2023-11-12 02:31:02,118 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 136 transitions, 948 flow, removed 8 selfloop flow, removed 1 redundant places. [2023-11-12 02:31:02,121 INFO L231 Difference]: Finished difference. Result has 61 places, 68 transitions, 590 flow [2023-11-12 02:31:02,121 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=150, PETRI_DIFFERENCE_MINUEND_FLOW=158, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=9, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=590, PETRI_PLACES=61, PETRI_TRANSITIONS=68} [2023-11-12 02:31:02,122 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 41 predicate places. [2023-11-12 02:31:02,122 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 68 transitions, 590 flow [2023-11-12 02:31:02,123 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 62.4) internal successors, (936), 15 states have internal predecessors, (936), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:31:02,123 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:31:02,123 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:31:02,135 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bbb65a9-ccc3-4197-8c4a-9f5cc53eb504/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-12 02:31:02,329 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bbb65a9-ccc3-4197-8c4a-9f5cc53eb504/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:31:02,330 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-12 02:31:02,330 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:31:02,330 INFO L85 PathProgramCache]: Analyzing trace with hash 1283641138, now seen corresponding path program 4 times [2023-11-12 02:31:02,330 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:31:02,331 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1935154710] [2023-11-12 02:31:02,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:31:02,331 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:31:02,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:31:02,533 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:31:02,533 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:31:02,534 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1935154710] [2023-11-12 02:31:02,534 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1935154710] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:31:02,534 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1171112822] [2023-11-12 02:31:02,534 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-12 02:31:02,534 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:31:02,535 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bbb65a9-ccc3-4197-8c4a-9f5cc53eb504/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:31:02,536 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bbb65a9-ccc3-4197-8c4a-9f5cc53eb504/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:31:02,567 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bbb65a9-ccc3-4197-8c4a-9f5cc53eb504/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-12 02:31:02,628 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-12 02:31:02,628 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-12 02:31:02,629 INFO L262 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-12 02:31:02,631 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:31:02,768 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:31:02,769 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:31:02,941 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:31:02,942 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1171112822] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 02:31:02,942 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 02:31:02,942 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2023-11-12 02:31:02,943 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2085431426] [2023-11-12 02:31:02,943 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 02:31:02,944 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-12 02:31:02,945 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:31:02,946 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-12 02:31:02,947 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2023-11-12 02:31:03,079 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 150 [2023-11-12 02:31:03,080 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 68 transitions, 590 flow. Second operand has 15 states, 15 states have (on average 62.4) internal successors, (936), 15 states have internal predecessors, (936), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:31:03,081 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:31:03,081 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 150 [2023-11-12 02:31:03,081 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:31:03,593 INFO L124 PetriNetUnfolderBase]: 272/478 cut-off events. [2023-11-12 02:31:03,593 INFO L125 PetriNetUnfolderBase]: For 2349/2349 co-relation queries the response was YES. [2023-11-12 02:31:03,595 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2369 conditions, 478 events. 272/478 cut-off events. For 2349/2349 co-relation queries the response was YES. Maximal size of possible extension queue 37. Compared 1842 event pairs, 26 based on Foata normal form. 30/508 useless extension candidates. Maximal degree in co-relation 1751. Up to 190 conditions per place. [2023-11-12 02:31:03,601 INFO L140 encePairwiseOnDemand]: 143/150 looper letters, 65 selfloop transitions, 71 changer transitions 0/136 dead transitions. [2023-11-12 02:31:03,601 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 136 transitions, 1339 flow [2023-11-12 02:31:03,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-11-12 02:31:03,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-11-12 02:31:03,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 1104 transitions. [2023-11-12 02:31:03,607 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4329411764705882 [2023-11-12 02:31:03,608 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 1104 transitions. [2023-11-12 02:31:03,608 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 1104 transitions. [2023-11-12 02:31:03,609 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:31:03,609 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 1104 transitions. [2023-11-12 02:31:03,614 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 64.94117647058823) internal successors, (1104), 17 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) [2023-11-12 02:31:03,621 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 150.0) internal successors, (2700), 18 states have internal predecessors, (2700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:31:03,623 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 150.0) internal successors, (2700), 18 states have internal predecessors, (2700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:31:03,623 INFO L175 Difference]: Start difference. First operand has 61 places, 68 transitions, 590 flow. Second operand 17 states and 1104 transitions. [2023-11-12 02:31:03,623 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 136 transitions, 1339 flow [2023-11-12 02:31:03,639 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 136 transitions, 1089 flow, removed 119 selfloop flow, removed 3 redundant places. [2023-11-12 02:31:03,644 INFO L231 Difference]: Finished difference. Result has 82 places, 105 transitions, 930 flow [2023-11-12 02:31:03,645 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=150, PETRI_DIFFERENCE_MINUEND_FLOW=438, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=930, PETRI_PLACES=82, PETRI_TRANSITIONS=105} [2023-11-12 02:31:03,648 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 62 predicate places. [2023-11-12 02:31:03,648 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 105 transitions, 930 flow [2023-11-12 02:31:03,649 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 62.4) internal successors, (936), 15 states have internal predecessors, (936), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:31:03,649 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:31:03,649 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:31:03,656 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bbb65a9-ccc3-4197-8c4a-9f5cc53eb504/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-12 02:31:03,854 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bbb65a9-ccc3-4197-8c4a-9f5cc53eb504/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-11-12 02:31:03,854 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-12 02:31:03,855 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:31:03,855 INFO L85 PathProgramCache]: Analyzing trace with hash -1109951690, now seen corresponding path program 5 times [2023-11-12 02:31:03,855 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:31:03,855 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1095609283] [2023-11-12 02:31:03,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:31:03,856 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:31:03,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:31:04,011 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:31:04,011 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:31:04,011 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1095609283] [2023-11-12 02:31:04,012 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1095609283] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:31:04,012 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1456144417] [2023-11-12 02:31:04,012 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-12 02:31:04,012 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:31:04,013 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bbb65a9-ccc3-4197-8c4a-9f5cc53eb504/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:31:04,034 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bbb65a9-ccc3-4197-8c4a-9f5cc53eb504/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:31:04,055 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bbb65a9-ccc3-4197-8c4a-9f5cc53eb504/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-12 02:31:04,126 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-11-12 02:31:04,126 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-12 02:31:04,127 INFO L262 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-12 02:31:04,129 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:31:04,249 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:31:04,249 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:31:04,313 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:31:04,314 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1456144417] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 02:31:04,314 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 02:31:04,314 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2023-11-12 02:31:04,314 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1945742812] [2023-11-12 02:31:04,315 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 02:31:04,315 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-12 02:31:04,316 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:31:04,316 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-12 02:31:04,316 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2023-11-12 02:31:04,448 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 150 [2023-11-12 02:31:04,449 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 105 transitions, 930 flow. Second operand has 15 states, 15 states have (on average 61.93333333333333) internal successors, (929), 15 states have internal predecessors, (929), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:31:04,449 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:31:04,449 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 150 [2023-11-12 02:31:04,450 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:31:04,982 INFO L124 PetriNetUnfolderBase]: 343/587 cut-off events. [2023-11-12 02:31:04,982 INFO L125 PetriNetUnfolderBase]: For 6816/6816 co-relation queries the response was YES. [2023-11-12 02:31:04,986 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3371 conditions, 587 events. 343/587 cut-off events. For 6816/6816 co-relation queries the response was YES. Maximal size of possible extension queue 48. Compared 2384 event pairs, 40 based on Foata normal form. 16/603 useless extension candidates. Maximal degree in co-relation 3205. Up to 286 conditions per place. [2023-11-12 02:31:04,993 INFO L140 encePairwiseOnDemand]: 143/150 looper letters, 71 selfloop transitions, 95 changer transitions 2/168 dead transitions. [2023-11-12 02:31:04,993 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 168 transitions, 1858 flow [2023-11-12 02:31:04,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-11-12 02:31:04,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2023-11-12 02:31:04,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 1159 transitions. [2023-11-12 02:31:04,999 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4292592592592593 [2023-11-12 02:31:04,999 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 1159 transitions. [2023-11-12 02:31:04,999 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 1159 transitions. [2023-11-12 02:31:05,000 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:31:05,001 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 1159 transitions. [2023-11-12 02:31:05,004 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 64.38888888888889) internal successors, (1159), 18 states have internal predecessors, (1159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:31:05,012 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 150.0) internal successors, (2850), 19 states have internal predecessors, (2850), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:31:05,014 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 150.0) internal successors, (2850), 19 states have internal predecessors, (2850), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:31:05,014 INFO L175 Difference]: Start difference. First operand has 82 places, 105 transitions, 930 flow. Second operand 18 states and 1159 transitions. [2023-11-12 02:31:05,014 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 168 transitions, 1858 flow [2023-11-12 02:31:05,051 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 168 transitions, 1737 flow, removed 56 selfloop flow, removed 2 redundant places. [2023-11-12 02:31:05,059 INFO L231 Difference]: Finished difference. Result has 102 places, 140 transitions, 1527 flow [2023-11-12 02:31:05,059 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=150, PETRI_DIFFERENCE_MINUEND_FLOW=814, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=105, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=1527, PETRI_PLACES=102, PETRI_TRANSITIONS=140} [2023-11-12 02:31:05,060 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 82 predicate places. [2023-11-12 02:31:05,062 INFO L495 AbstractCegarLoop]: Abstraction has has 102 places, 140 transitions, 1527 flow [2023-11-12 02:31:05,065 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 61.93333333333333) internal successors, (929), 15 states have internal predecessors, (929), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:31:05,065 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:31:05,065 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:31:05,075 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bbb65a9-ccc3-4197-8c4a-9f5cc53eb504/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-12 02:31:05,275 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bbb65a9-ccc3-4197-8c4a-9f5cc53eb504/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2023-11-12 02:31:05,276 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-12 02:31:05,276 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:31:05,276 INFO L85 PathProgramCache]: Analyzing trace with hash -1492700296, now seen corresponding path program 6 times [2023-11-12 02:31:05,277 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:31:05,277 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [591326642] [2023-11-12 02:31:05,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:31:05,277 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:31:05,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:31:05,420 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:31:05,420 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:31:05,420 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [591326642] [2023-11-12 02:31:05,421 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [591326642] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:31:05,421 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1753840040] [2023-11-12 02:31:05,421 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-12 02:31:05,421 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:31:05,421 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bbb65a9-ccc3-4197-8c4a-9f5cc53eb504/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:31:05,422 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bbb65a9-ccc3-4197-8c4a-9f5cc53eb504/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:31:05,458 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bbb65a9-ccc3-4197-8c4a-9f5cc53eb504/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-12 02:31:05,513 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-11-12 02:31:05,513 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-12 02:31:05,514 INFO L262 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-12 02:31:05,516 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:31:05,616 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:31:05,617 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:31:05,762 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:31:05,762 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1753840040] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 02:31:05,762 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 02:31:05,763 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 16 [2023-11-12 02:31:05,763 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [240455886] [2023-11-12 02:31:05,763 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 02:31:05,764 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-11-12 02:31:05,764 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:31:05,764 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-11-12 02:31:05,765 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=176, Unknown=0, NotChecked=0, Total=240 [2023-11-12 02:31:05,964 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 150 [2023-11-12 02:31:05,965 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 140 transitions, 1527 flow. Second operand has 16 states, 16 states have (on average 62.375) internal successors, (998), 16 states have internal predecessors, (998), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:31:05,965 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:31:05,965 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 150 [2023-11-12 02:31:05,965 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:31:06,609 INFO L124 PetriNetUnfolderBase]: 427/767 cut-off events. [2023-11-12 02:31:06,609 INFO L125 PetriNetUnfolderBase]: For 12163/12163 co-relation queries the response was YES. [2023-11-12 02:31:06,614 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4459 conditions, 767 events. 427/767 cut-off events. For 12163/12163 co-relation queries the response was YES. Maximal size of possible extension queue 58. Compared 3421 event pairs, 7 based on Foata normal form. 40/807 useless extension candidates. Maximal degree in co-relation 4266. Up to 230 conditions per place. [2023-11-12 02:31:06,624 INFO L140 encePairwiseOnDemand]: 143/150 looper letters, 82 selfloop transitions, 135 changer transitions 4/221 dead transitions. [2023-11-12 02:31:06,624 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 122 places, 221 transitions, 2560 flow [2023-11-12 02:31:06,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-11-12 02:31:06,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2023-11-12 02:31:06,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 1487 transitions. [2023-11-12 02:31:06,634 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4310144927536232 [2023-11-12 02:31:06,635 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 1487 transitions. [2023-11-12 02:31:06,635 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 1487 transitions. [2023-11-12 02:31:06,636 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:31:06,637 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 1487 transitions. [2023-11-12 02:31:06,641 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 24 states, 23 states have (on average 64.65217391304348) internal successors, (1487), 23 states have internal predecessors, (1487), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:31:06,649 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 24 states, 24 states have (on average 150.0) internal successors, (3600), 24 states have internal predecessors, (3600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:31:06,650 INFO L81 ComplementDD]: Finished complementDD. Result has 24 states, 24 states have (on average 150.0) internal successors, (3600), 24 states have internal predecessors, (3600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:31:06,651 INFO L175 Difference]: Start difference. First operand has 102 places, 140 transitions, 1527 flow. Second operand 23 states and 1487 transitions. [2023-11-12 02:31:06,651 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 122 places, 221 transitions, 2560 flow [2023-11-12 02:31:06,705 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 114 places, 221 transitions, 2272 flow, removed 129 selfloop flow, removed 8 redundant places. [2023-11-12 02:31:06,711 INFO L231 Difference]: Finished difference. Result has 122 places, 169 transitions, 2021 flow [2023-11-12 02:31:06,711 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=150, PETRI_DIFFERENCE_MINUEND_FLOW=1202, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=133, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=98, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=2021, PETRI_PLACES=122, PETRI_TRANSITIONS=169} [2023-11-12 02:31:06,719 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 102 predicate places. [2023-11-12 02:31:06,720 INFO L495 AbstractCegarLoop]: Abstraction has has 122 places, 169 transitions, 2021 flow [2023-11-12 02:31:06,720 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 62.375) internal successors, (998), 16 states have internal predecessors, (998), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:31:06,721 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:31:06,721 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:31:06,728 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bbb65a9-ccc3-4197-8c4a-9f5cc53eb504/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-12 02:31:06,927 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bbb65a9-ccc3-4197-8c4a-9f5cc53eb504/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2023-11-12 02:31:06,927 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-12 02:31:06,927 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:31:06,927 INFO L85 PathProgramCache]: Analyzing trace with hash -1733129656, now seen corresponding path program 7 times [2023-11-12 02:31:06,927 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:31:06,928 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2070357018] [2023-11-12 02:31:06,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:31:06,928 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:31:06,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:31:07,112 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:31:07,112 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:31:07,112 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2070357018] [2023-11-12 02:31:07,113 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2070357018] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:31:07,113 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [819529753] [2023-11-12 02:31:07,113 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-12 02:31:07,113 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:31:07,113 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bbb65a9-ccc3-4197-8c4a-9f5cc53eb504/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:31:07,114 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bbb65a9-ccc3-4197-8c4a-9f5cc53eb504/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:31:07,139 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bbb65a9-ccc3-4197-8c4a-9f5cc53eb504/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-12 02:31:07,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:31:07,199 INFO L262 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-12 02:31:07,200 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:31:07,351 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:31:07,351 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:31:07,483 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:31:07,483 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [819529753] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 02:31:07,483 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 02:31:07,483 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 17 [2023-11-12 02:31:07,484 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2144992491] [2023-11-12 02:31:07,484 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 02:31:07,484 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-11-12 02:31:07,485 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:31:07,486 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-11-12 02:31:07,486 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=201, Unknown=0, NotChecked=0, Total=272 [2023-11-12 02:31:07,607 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 150 [2023-11-12 02:31:07,609 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 122 places, 169 transitions, 2021 flow. Second operand has 17 states, 17 states have (on average 62.11764705882353) internal successors, (1056), 17 states have internal predecessors, (1056), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:31:07,610 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:31:07,610 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 150 [2023-11-12 02:31:07,610 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:31:08,519 INFO L124 PetriNetUnfolderBase]: 571/1029 cut-off events. [2023-11-12 02:31:08,520 INFO L125 PetriNetUnfolderBase]: For 5751/5751 co-relation queries the response was YES. [2023-11-12 02:31:08,528 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6023 conditions, 1029 events. 571/1029 cut-off events. For 5751/5751 co-relation queries the response was YES. Maximal size of possible extension queue 83. Compared 5130 event pairs, 43 based on Foata normal form. 10/1039 useless extension candidates. Maximal degree in co-relation 5647. Up to 365 conditions per place. [2023-11-12 02:31:08,543 INFO L140 encePairwiseOnDemand]: 143/150 looper letters, 130 selfloop transitions, 149 changer transitions 0/279 dead transitions. [2023-11-12 02:31:08,543 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 144 places, 279 transitions, 3585 flow [2023-11-12 02:31:08,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-11-12 02:31:08,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2023-11-12 02:31:08,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 1545 transitions. [2023-11-12 02:31:08,555 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42916666666666664 [2023-11-12 02:31:08,555 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 1545 transitions. [2023-11-12 02:31:08,556 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 1545 transitions. [2023-11-12 02:31:08,558 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:31:08,558 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 1545 transitions. [2023-11-12 02:31:08,565 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 64.375) internal successors, (1545), 24 states have internal predecessors, (1545), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:31:08,575 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 150.0) internal successors, (3750), 25 states have internal predecessors, (3750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:31:08,576 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 150.0) internal successors, (3750), 25 states have internal predecessors, (3750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:31:08,577 INFO L175 Difference]: Start difference. First operand has 122 places, 169 transitions, 2021 flow. Second operand 24 states and 1545 transitions. [2023-11-12 02:31:08,577 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 144 places, 279 transitions, 3585 flow [2023-11-12 02:31:08,630 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 134 places, 279 transitions, 3451 flow, removed 28 selfloop flow, removed 10 redundant places. [2023-11-12 02:31:08,641 INFO L231 Difference]: Finished difference. Result has 142 places, 237 transitions, 3213 flow [2023-11-12 02:31:08,641 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=150, PETRI_DIFFERENCE_MINUEND_FLOW=1911, PETRI_DIFFERENCE_MINUEND_PLACES=111, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=169, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=88, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=3213, PETRI_PLACES=142, PETRI_TRANSITIONS=237} [2023-11-12 02:31:08,642 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 122 predicate places. [2023-11-12 02:31:08,643 INFO L495 AbstractCegarLoop]: Abstraction has has 142 places, 237 transitions, 3213 flow [2023-11-12 02:31:08,643 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 62.11764705882353) internal successors, (1056), 17 states have internal predecessors, (1056), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:31:08,644 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:31:08,644 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:31:08,655 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bbb65a9-ccc3-4197-8c4a-9f5cc53eb504/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-12 02:31:08,849 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bbb65a9-ccc3-4197-8c4a-9f5cc53eb504/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:31:08,850 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-12 02:31:08,850 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:31:08,850 INFO L85 PathProgramCache]: Analyzing trace with hash 2083064580, now seen corresponding path program 8 times [2023-11-12 02:31:08,850 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:31:08,850 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [381938755] [2023-11-12 02:31:08,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:31:08,851 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:31:08,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:31:09,067 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:31:09,067 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:31:09,067 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [381938755] [2023-11-12 02:31:09,068 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [381938755] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:31:09,068 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1715656529] [2023-11-12 02:31:09,068 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-12 02:31:09,068 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:31:09,068 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bbb65a9-ccc3-4197-8c4a-9f5cc53eb504/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:31:09,070 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bbb65a9-ccc3-4197-8c4a-9f5cc53eb504/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:31:09,103 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bbb65a9-ccc3-4197-8c4a-9f5cc53eb504/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-12 02:31:09,173 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-12 02:31:09,173 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-12 02:31:09,175 INFO L262 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-12 02:31:09,176 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:31:09,301 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:31:09,301 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:31:09,469 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:31:09,469 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1715656529] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 02:31:09,470 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 02:31:09,470 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 17 [2023-11-12 02:31:09,470 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [128065843] [2023-11-12 02:31:09,470 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 02:31:09,471 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-11-12 02:31:09,473 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:31:09,474 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-11-12 02:31:09,474 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=195, Unknown=0, NotChecked=0, Total=272 [2023-11-12 02:31:09,586 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 150 [2023-11-12 02:31:09,588 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 142 places, 237 transitions, 3213 flow. Second operand has 17 states, 17 states have (on average 62.23529411764706) internal successors, (1058), 17 states have internal predecessors, (1058), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:31:09,588 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:31:09,588 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 150 [2023-11-12 02:31:09,588 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:31:10,426 INFO L124 PetriNetUnfolderBase]: 655/1191 cut-off events. [2023-11-12 02:31:10,427 INFO L125 PetriNetUnfolderBase]: For 10080/10080 co-relation queries the response was YES. [2023-11-12 02:31:10,437 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7685 conditions, 1191 events. 655/1191 cut-off events. For 10080/10080 co-relation queries the response was YES. Maximal size of possible extension queue 100. Compared 6224 event pairs, 151 based on Foata normal form. 42/1233 useless extension candidates. Maximal degree in co-relation 7207. Up to 969 conditions per place. [2023-11-12 02:31:10,452 INFO L140 encePairwiseOnDemand]: 143/150 looper letters, 245 selfloop transitions, 62 changer transitions 1/308 dead transitions. [2023-11-12 02:31:10,452 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 160 places, 308 transitions, 4467 flow [2023-11-12 02:31:10,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-11-12 02:31:10,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2023-11-12 02:31:10,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 1235 transitions. [2023-11-12 02:31:10,458 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43333333333333335 [2023-11-12 02:31:10,458 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 1235 transitions. [2023-11-12 02:31:10,458 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 1235 transitions. [2023-11-12 02:31:10,463 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:31:10,463 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 1235 transitions. [2023-11-12 02:31:10,470 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 65.0) internal successors, (1235), 19 states have internal predecessors, (1235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:31:10,477 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 150.0) internal successors, (3000), 20 states have internal predecessors, (3000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:31:10,479 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 150.0) internal successors, (3000), 20 states have internal predecessors, (3000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:31:10,479 INFO L175 Difference]: Start difference. First operand has 142 places, 237 transitions, 3213 flow. Second operand 19 states and 1235 transitions. [2023-11-12 02:31:10,479 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 160 places, 308 transitions, 4467 flow [2023-11-12 02:31:10,555 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 153 places, 308 transitions, 4321 flow, removed 51 selfloop flow, removed 7 redundant places. [2023-11-12 02:31:10,566 INFO L231 Difference]: Finished difference. Result has 165 places, 270 transitions, 3758 flow [2023-11-12 02:31:10,568 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=150, PETRI_DIFFERENCE_MINUEND_FLOW=3067, PETRI_DIFFERENCE_MINUEND_PLACES=135, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=237, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=192, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=3758, PETRI_PLACES=165, PETRI_TRANSITIONS=270} [2023-11-12 02:31:10,568 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 145 predicate places. [2023-11-12 02:31:10,569 INFO L495 AbstractCegarLoop]: Abstraction has has 165 places, 270 transitions, 3758 flow [2023-11-12 02:31:10,569 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 62.23529411764706) internal successors, (1058), 17 states have internal predecessors, (1058), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:31:10,570 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:31:10,570 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:31:10,585 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bbb65a9-ccc3-4197-8c4a-9f5cc53eb504/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-11-12 02:31:10,776 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bbb65a9-ccc3-4197-8c4a-9f5cc53eb504/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-11-12 02:31:10,776 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-12 02:31:10,776 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:31:10,777 INFO L85 PathProgramCache]: Analyzing trace with hash 1295425472, now seen corresponding path program 9 times [2023-11-12 02:31:10,777 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:31:10,777 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1347643584] [2023-11-12 02:31:10,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:31:10,777 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:31:10,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:31:10,933 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:31:10,933 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:31:10,934 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1347643584] [2023-11-12 02:31:10,934 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1347643584] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:31:10,934 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1137757] [2023-11-12 02:31:10,934 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-12 02:31:10,934 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:31:10,935 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bbb65a9-ccc3-4197-8c4a-9f5cc53eb504/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:31:10,936 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bbb65a9-ccc3-4197-8c4a-9f5cc53eb504/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:31:10,963 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bbb65a9-ccc3-4197-8c4a-9f5cc53eb504/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-12 02:31:11,040 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-11-12 02:31:11,040 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-12 02:31:11,042 INFO L262 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-12 02:31:11,043 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:31:11,134 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:31:11,134 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:31:11,254 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:31:11,254 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1137757] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 02:31:11,254 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 02:31:11,254 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 15 [2023-11-12 02:31:11,255 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [809722132] [2023-11-12 02:31:11,255 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 02:31:11,256 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-12 02:31:11,258 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:31:11,258 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-12 02:31:11,258 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2023-11-12 02:31:11,403 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 150 [2023-11-12 02:31:11,404 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 165 places, 270 transitions, 3758 flow. Second operand has 15 states, 15 states have (on average 62.06666666666667) internal successors, (931), 15 states have internal predecessors, (931), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:31:11,404 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:31:11,404 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 150 [2023-11-12 02:31:11,405 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:31:12,007 INFO L124 PetriNetUnfolderBase]: 649/1165 cut-off events. [2023-11-12 02:31:12,007 INFO L125 PetriNetUnfolderBase]: For 10699/10699 co-relation queries the response was YES. [2023-11-12 02:31:12,020 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7958 conditions, 1165 events. 649/1165 cut-off events. For 10699/10699 co-relation queries the response was YES. Maximal size of possible extension queue 99. Compared 5989 event pairs, 162 based on Foata normal form. 6/1171 useless extension candidates. Maximal degree in co-relation 7691. Up to 1016 conditions per place. [2023-11-12 02:31:12,035 INFO L140 encePairwiseOnDemand]: 143/150 looper letters, 233 selfloop transitions, 56 changer transitions 4/293 dead transitions. [2023-11-12 02:31:12,035 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 176 places, 293 transitions, 4605 flow [2023-11-12 02:31:12,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-12 02:31:12,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-11-12 02:31:12,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 772 transitions. [2023-11-12 02:31:12,038 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4288888888888889 [2023-11-12 02:31:12,038 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 772 transitions. [2023-11-12 02:31:12,038 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 772 transitions. [2023-11-12 02:31:12,039 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:31:12,039 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 772 transitions. [2023-11-12 02:31:12,041 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 64.33333333333333) internal successors, (772), 12 states have internal predecessors, (772), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:31:12,045 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 150.0) internal successors, (1950), 13 states have internal predecessors, (1950), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:31:12,046 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 150.0) internal successors, (1950), 13 states have internal predecessors, (1950), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:31:12,046 INFO L175 Difference]: Start difference. First operand has 165 places, 270 transitions, 3758 flow. Second operand 12 states and 772 transitions. [2023-11-12 02:31:12,047 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 176 places, 293 transitions, 4605 flow [2023-11-12 02:31:12,153 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 172 places, 293 transitions, 4359 flow, removed 96 selfloop flow, removed 4 redundant places. [2023-11-12 02:31:12,161 INFO L231 Difference]: Finished difference. Result has 174 places, 274 transitions, 3727 flow [2023-11-12 02:31:12,162 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=150, PETRI_DIFFERENCE_MINUEND_FLOW=3526, PETRI_DIFFERENCE_MINUEND_PLACES=161, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=270, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=218, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=3727, PETRI_PLACES=174, PETRI_TRANSITIONS=274} [2023-11-12 02:31:12,162 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 154 predicate places. [2023-11-12 02:31:12,162 INFO L495 AbstractCegarLoop]: Abstraction has has 174 places, 274 transitions, 3727 flow [2023-11-12 02:31:12,163 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 62.06666666666667) internal successors, (931), 15 states have internal predecessors, (931), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:31:12,163 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:31:12,164 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:31:12,175 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bbb65a9-ccc3-4197-8c4a-9f5cc53eb504/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-11-12 02:31:12,375 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bbb65a9-ccc3-4197-8c4a-9f5cc53eb504/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:31:12,375 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-12 02:31:12,376 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:31:12,376 INFO L85 PathProgramCache]: Analyzing trace with hash 988257593, now seen corresponding path program 10 times [2023-11-12 02:31:12,376 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:31:12,376 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1442664147] [2023-11-12 02:31:12,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:31:12,376 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:31:12,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:31:12,534 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:31:12,535 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:31:12,535 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1442664147] [2023-11-12 02:31:12,536 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1442664147] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:31:12,536 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [253784363] [2023-11-12 02:31:12,536 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-12 02:31:12,536 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:31:12,536 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bbb65a9-ccc3-4197-8c4a-9f5cc53eb504/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:31:12,537 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bbb65a9-ccc3-4197-8c4a-9f5cc53eb504/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:31:12,543 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bbb65a9-ccc3-4197-8c4a-9f5cc53eb504/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-12 02:31:12,629 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-12 02:31:12,629 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-12 02:31:12,630 INFO L262 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 11 conjunts are in the unsatisfiable core [2023-11-12 02:31:12,632 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:31:12,670 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:31:12,670 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:31:12,818 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:31:12,818 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [253784363] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 02:31:12,818 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 02:31:12,819 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 4, 5] total 8 [2023-11-12 02:31:12,819 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [188337998] [2023-11-12 02:31:12,819 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 02:31:12,819 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-12 02:31:12,820 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:31:12,820 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-12 02:31:12,820 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2023-11-12 02:31:12,882 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 150 [2023-11-12 02:31:12,883 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 174 places, 274 transitions, 3727 flow. Second operand has 10 states, 10 states have (on average 68.4) internal successors, (684), 10 states have internal predecessors, (684), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:31:12,884 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:31:12,884 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 150 [2023-11-12 02:31:12,884 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:31:13,492 INFO L124 PetriNetUnfolderBase]: 955/1700 cut-off events. [2023-11-12 02:31:13,492 INFO L125 PetriNetUnfolderBase]: For 14129/14129 co-relation queries the response was YES. [2023-11-12 02:31:13,513 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11519 conditions, 1700 events. 955/1700 cut-off events. For 14129/14129 co-relation queries the response was YES. Maximal size of possible extension queue 144. Compared 9412 event pairs, 28 based on Foata normal form. 1/1701 useless extension candidates. Maximal degree in co-relation 11236. Up to 860 conditions per place. [2023-11-12 02:31:13,534 INFO L140 encePairwiseOnDemand]: 146/150 looper letters, 269 selfloop transitions, 118 changer transitions 40/427 dead transitions. [2023-11-12 02:31:13,534 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 178 places, 427 transitions, 6491 flow [2023-11-12 02:31:13,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-12 02:31:13,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-12 02:31:13,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 445 transitions. [2023-11-12 02:31:13,536 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49444444444444446 [2023-11-12 02:31:13,536 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 445 transitions. [2023-11-12 02:31:13,536 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 445 transitions. [2023-11-12 02:31:13,537 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:31:13,537 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 445 transitions. [2023-11-12 02:31:13,538 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 74.16666666666667) internal successors, (445), 6 states have internal predecessors, (445), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:31:13,540 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 150.0) internal successors, (1050), 7 states have internal predecessors, (1050), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:31:13,541 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 150.0) internal successors, (1050), 7 states have internal predecessors, (1050), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:31:13,541 INFO L175 Difference]: Start difference. First operand has 174 places, 274 transitions, 3727 flow. Second operand 6 states and 445 transitions. [2023-11-12 02:31:13,541 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 178 places, 427 transitions, 6491 flow [2023-11-12 02:31:13,740 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 173 places, 427 transitions, 6325 flow, removed 34 selfloop flow, removed 5 redundant places. [2023-11-12 02:31:13,752 INFO L231 Difference]: Finished difference. Result has 176 places, 335 transitions, 4996 flow [2023-11-12 02:31:13,753 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=150, PETRI_DIFFERENCE_MINUEND_FLOW=3623, PETRI_DIFFERENCE_MINUEND_PLACES=168, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=274, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=156, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4996, PETRI_PLACES=176, PETRI_TRANSITIONS=335} [2023-11-12 02:31:13,753 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 156 predicate places. [2023-11-12 02:31:13,754 INFO L495 AbstractCegarLoop]: Abstraction has has 176 places, 335 transitions, 4996 flow [2023-11-12 02:31:13,754 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 68.4) internal successors, (684), 10 states have internal predecessors, (684), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:31:13,754 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:31:13,755 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:31:13,761 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bbb65a9-ccc3-4197-8c4a-9f5cc53eb504/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-11-12 02:31:13,960 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bbb65a9-ccc3-4197-8c4a-9f5cc53eb504/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-11-12 02:31:13,961 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-12 02:31:13,961 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:31:13,961 INFO L85 PathProgramCache]: Analyzing trace with hash -1633770783, now seen corresponding path program 11 times [2023-11-12 02:31:13,962 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:31:13,962 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [809840937] [2023-11-12 02:31:13,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:31:13,962 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:31:13,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:31:14,090 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-12 02:31:14,091 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:31:14,091 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [809840937] [2023-11-12 02:31:14,091 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [809840937] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:31:14,091 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1262596819] [2023-11-12 02:31:14,092 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-12 02:31:14,092 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:31:14,092 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bbb65a9-ccc3-4197-8c4a-9f5cc53eb504/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:31:14,093 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bbb65a9-ccc3-4197-8c4a-9f5cc53eb504/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:31:14,115 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bbb65a9-ccc3-4197-8c4a-9f5cc53eb504/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-12 02:31:14,190 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-11-12 02:31:14,190 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-12 02:31:14,191 INFO L262 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-12 02:31:14,193 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:31:14,213 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-12 02:31:14,213 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:31:14,282 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-12 02:31:14,282 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1262596819] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 02:31:14,282 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 02:31:14,283 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 6 [2023-11-12 02:31:14,283 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [92491132] [2023-11-12 02:31:14,283 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 02:31:14,284 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-12 02:31:14,285 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:31:14,286 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-12 02:31:14,286 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-11-12 02:31:14,321 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 150 [2023-11-12 02:31:14,322 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 176 places, 335 transitions, 4996 flow. Second operand has 7 states, 7 states have (on average 69.0) internal successors, (483), 7 states have internal predecessors, (483), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:31:14,322 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:31:14,322 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 150 [2023-11-12 02:31:14,323 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:31:15,129 INFO L124 PetriNetUnfolderBase]: 918/1673 cut-off events. [2023-11-12 02:31:15,129 INFO L125 PetriNetUnfolderBase]: For 17634/17634 co-relation queries the response was YES. [2023-11-12 02:31:15,148 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12211 conditions, 1673 events. 918/1673 cut-off events. For 17634/17634 co-relation queries the response was YES. Maximal size of possible extension queue 146. Compared 9502 event pairs, 53 based on Foata normal form. 26/1699 useless extension candidates. Maximal degree in co-relation 11919. Up to 1296 conditions per place. [2023-11-12 02:31:15,169 INFO L140 encePairwiseOnDemand]: 146/150 looper letters, 288 selfloop transitions, 82 changer transitions 14/384 dead transitions. [2023-11-12 02:31:15,170 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 182 places, 384 transitions, 6316 flow [2023-11-12 02:31:15,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-12 02:31:15,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-12 02:31:15,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 515 transitions. [2023-11-12 02:31:15,172 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49047619047619045 [2023-11-12 02:31:15,172 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 515 transitions. [2023-11-12 02:31:15,172 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 515 transitions. [2023-11-12 02:31:15,172 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:31:15,173 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 515 transitions. [2023-11-12 02:31:15,174 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 73.57142857142857) internal successors, (515), 7 states have internal predecessors, (515), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:31:15,176 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 150.0) internal successors, (1200), 8 states have internal predecessors, (1200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:31:15,177 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 150.0) internal successors, (1200), 8 states have internal predecessors, (1200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:31:15,177 INFO L175 Difference]: Start difference. First operand has 176 places, 335 transitions, 4996 flow. Second operand 7 states and 515 transitions. [2023-11-12 02:31:15,177 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 182 places, 384 transitions, 6316 flow [2023-11-12 02:31:15,316 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 179 places, 384 transitions, 6256 flow, removed 18 selfloop flow, removed 3 redundant places. [2023-11-12 02:31:15,328 INFO L231 Difference]: Finished difference. Result has 183 places, 346 transitions, 5435 flow [2023-11-12 02:31:15,329 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=150, PETRI_DIFFERENCE_MINUEND_FLOW=4949, PETRI_DIFFERENCE_MINUEND_PLACES=173, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=335, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=258, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5435, PETRI_PLACES=183, PETRI_TRANSITIONS=346} [2023-11-12 02:31:15,331 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 163 predicate places. [2023-11-12 02:31:15,331 INFO L495 AbstractCegarLoop]: Abstraction has has 183 places, 346 transitions, 5435 flow [2023-11-12 02:31:15,332 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 69.0) internal successors, (483), 7 states have internal predecessors, (483), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:31:15,332 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:31:15,332 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:31:15,343 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bbb65a9-ccc3-4197-8c4a-9f5cc53eb504/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-11-12 02:31:15,543 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bbb65a9-ccc3-4197-8c4a-9f5cc53eb504/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-11-12 02:31:15,543 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-12 02:31:15,544 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:31:15,544 INFO L85 PathProgramCache]: Analyzing trace with hash 1413829281, now seen corresponding path program 12 times [2023-11-12 02:31:15,544 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:31:15,544 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1942236095] [2023-11-12 02:31:15,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:31:15,544 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:31:15,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:31:15,730 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:31:15,730 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:31:15,730 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1942236095] [2023-11-12 02:31:15,730 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1942236095] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:31:15,730 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [734523921] [2023-11-12 02:31:15,731 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-12 02:31:15,731 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:31:15,731 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bbb65a9-ccc3-4197-8c4a-9f5cc53eb504/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:31:15,732 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bbb65a9-ccc3-4197-8c4a-9f5cc53eb504/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:31:15,751 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bbb65a9-ccc3-4197-8c4a-9f5cc53eb504/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-11-12 02:31:15,815 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-11-12 02:31:15,815 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-12 02:31:15,817 INFO L262 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 11 conjunts are in the unsatisfiable core [2023-11-12 02:31:15,818 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:31:15,939 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:31:15,940 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:31:16,181 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:31:16,181 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [734523921] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 02:31:16,181 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 02:31:16,182 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 8] total 18 [2023-11-12 02:31:16,182 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2071932407] [2023-11-12 02:31:16,182 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 02:31:16,182 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-11-12 02:31:16,183 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:31:16,183 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-11-12 02:31:16,184 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=264, Unknown=0, NotChecked=0, Total=342 [2023-11-12 02:31:16,313 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 150 [2023-11-12 02:31:16,315 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 183 places, 346 transitions, 5435 flow. Second operand has 19 states, 19 states have (on average 62.1578947368421) internal successors, (1181), 19 states have internal predecessors, (1181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:31:16,315 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:31:16,315 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 150 [2023-11-12 02:31:16,316 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:31:17,572 INFO L124 PetriNetUnfolderBase]: 1000/1835 cut-off events. [2023-11-12 02:31:17,573 INFO L125 PetriNetUnfolderBase]: For 21239/21239 co-relation queries the response was YES. [2023-11-12 02:31:17,598 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13698 conditions, 1835 events. 1000/1835 cut-off events. For 21239/21239 co-relation queries the response was YES. Maximal size of possible extension queue 160. Compared 10737 event pairs, 17 based on Foata normal form. 24/1859 useless extension candidates. Maximal degree in co-relation 13385. Up to 502 conditions per place. [2023-11-12 02:31:17,659 INFO L140 encePairwiseOnDemand]: 143/150 looper letters, 157 selfloop transitions, 275 changer transitions 4/436 dead transitions. [2023-11-12 02:31:17,661 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 207 places, 436 transitions, 7257 flow [2023-11-12 02:31:17,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-11-12 02:31:17,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2023-11-12 02:31:17,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 1615 transitions. [2023-11-12 02:31:17,665 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43066666666666664 [2023-11-12 02:31:17,665 INFO L72 ComplementDD]: Start complementDD. Operand 25 states and 1615 transitions. [2023-11-12 02:31:17,665 INFO L73 IsDeterministic]: Start isDeterministic. Operand 25 states and 1615 transitions. [2023-11-12 02:31:17,667 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:31:17,667 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 25 states and 1615 transitions. [2023-11-12 02:31:17,671 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 26 states, 25 states have (on average 64.6) internal successors, (1615), 25 states have internal predecessors, (1615), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:31:17,688 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 26 states, 26 states have (on average 150.0) internal successors, (3900), 26 states have internal predecessors, (3900), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:31:17,699 INFO L81 ComplementDD]: Finished complementDD. Result has 26 states, 26 states have (on average 150.0) internal successors, (3900), 26 states have internal predecessors, (3900), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:31:17,699 INFO L175 Difference]: Start difference. First operand has 183 places, 346 transitions, 5435 flow. Second operand 25 states and 1615 transitions. [2023-11-12 02:31:17,700 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 207 places, 436 transitions, 7257 flow [2023-11-12 02:31:17,865 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 202 places, 436 transitions, 7088 flow, removed 24 selfloop flow, removed 5 redundant places. [2023-11-12 02:31:17,878 INFO L231 Difference]: Finished difference. Result has 207 places, 378 transitions, 6606 flow [2023-11-12 02:31:17,879 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=150, PETRI_DIFFERENCE_MINUEND_FLOW=5268, PETRI_DIFFERENCE_MINUEND_PLACES=178, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=346, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=241, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=101, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=6606, PETRI_PLACES=207, PETRI_TRANSITIONS=378} [2023-11-12 02:31:17,880 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 187 predicate places. [2023-11-12 02:31:17,880 INFO L495 AbstractCegarLoop]: Abstraction has has 207 places, 378 transitions, 6606 flow [2023-11-12 02:31:17,881 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 62.1578947368421) internal successors, (1181), 19 states have internal predecessors, (1181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:31:17,881 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:31:17,881 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:31:17,893 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bbb65a9-ccc3-4197-8c4a-9f5cc53eb504/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-11-12 02:31:18,087 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bbb65a9-ccc3-4197-8c4a-9f5cc53eb504/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-11-12 02:31:18,087 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-12 02:31:18,088 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:31:18,088 INFO L85 PathProgramCache]: Analyzing trace with hash -2081549581, now seen corresponding path program 13 times [2023-11-12 02:31:18,088 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:31:18,088 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1684928181] [2023-11-12 02:31:18,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:31:18,089 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:31:18,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:31:18,305 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:31:18,305 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:31:18,305 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1684928181] [2023-11-12 02:31:18,306 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1684928181] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:31:18,306 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2009307473] [2023-11-12 02:31:18,306 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-12 02:31:18,306 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:31:18,306 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bbb65a9-ccc3-4197-8c4a-9f5cc53eb504/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:31:18,308 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bbb65a9-ccc3-4197-8c4a-9f5cc53eb504/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:31:18,327 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bbb65a9-ccc3-4197-8c4a-9f5cc53eb504/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-11-12 02:31:18,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:31:18,402 INFO L262 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-12 02:31:18,404 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:31:18,536 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:31:18,536 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:31:18,728 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-12 02:31:18,728 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2009307473] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 02:31:18,728 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 02:31:18,728 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 6] total 17 [2023-11-12 02:31:18,729 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [652568919] [2023-11-12 02:31:18,729 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 02:31:18,729 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-11-12 02:31:18,730 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:31:18,730 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-11-12 02:31:18,730 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=237, Unknown=0, NotChecked=0, Total=306 [2023-11-12 02:31:18,983 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 150 [2023-11-12 02:31:18,984 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 207 places, 378 transitions, 6606 flow. Second operand has 18 states, 18 states have (on average 61.888888888888886) internal successors, (1114), 18 states have internal predecessors, (1114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:31:18,984 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:31:18,984 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 150 [2023-11-12 02:31:18,984 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:31:20,070 INFO L124 PetriNetUnfolderBase]: 961/1728 cut-off events. [2023-11-12 02:31:20,070 INFO L125 PetriNetUnfolderBase]: For 22511/22511 co-relation queries the response was YES. [2023-11-12 02:31:20,092 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14193 conditions, 1728 events. 961/1728 cut-off events. For 22511/22511 co-relation queries the response was YES. Maximal size of possible extension queue 156. Compared 9895 event pairs, 35 based on Foata normal form. 8/1736 useless extension candidates. Maximal degree in co-relation 13871. Up to 883 conditions per place. [2023-11-12 02:31:20,109 INFO L140 encePairwiseOnDemand]: 143/150 looper letters, 206 selfloop transitions, 201 changer transitions 4/411 dead transitions. [2023-11-12 02:31:20,109 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 221 places, 411 transitions, 7758 flow [2023-11-12 02:31:20,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-11-12 02:31:20,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-11-12 02:31:20,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 970 transitions. [2023-11-12 02:31:20,112 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4311111111111111 [2023-11-12 02:31:20,112 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 970 transitions. [2023-11-12 02:31:20,112 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 970 transitions. [2023-11-12 02:31:20,113 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:31:20,113 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 970 transitions. [2023-11-12 02:31:20,115 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 64.66666666666667) internal successors, (970), 15 states have internal predecessors, (970), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:31:20,120 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 150.0) internal successors, (2400), 16 states have internal predecessors, (2400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:31:20,121 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 150.0) internal successors, (2400), 16 states have internal predecessors, (2400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:31:20,121 INFO L175 Difference]: Start difference. First operand has 207 places, 378 transitions, 6606 flow. Second operand 15 states and 970 transitions. [2023-11-12 02:31:20,121 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 221 places, 411 transitions, 7758 flow [2023-11-12 02:31:20,328 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 206 places, 411 transitions, 7308 flow, removed 103 selfloop flow, removed 15 redundant places. [2023-11-12 02:31:20,340 INFO L231 Difference]: Finished difference. Result has 208 places, 378 transitions, 6682 flow [2023-11-12 02:31:20,341 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=150, PETRI_DIFFERENCE_MINUEND_FLOW=6159, PETRI_DIFFERENCE_MINUEND_PLACES=192, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=378, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=199, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=178, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=6682, PETRI_PLACES=208, PETRI_TRANSITIONS=378} [2023-11-12 02:31:20,342 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 188 predicate places. [2023-11-12 02:31:20,342 INFO L495 AbstractCegarLoop]: Abstraction has has 208 places, 378 transitions, 6682 flow [2023-11-12 02:31:20,342 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 61.888888888888886) internal successors, (1114), 18 states have internal predecessors, (1114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:31:20,343 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:31:20,343 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:31:20,348 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bbb65a9-ccc3-4197-8c4a-9f5cc53eb504/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-11-12 02:31:20,543 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bbb65a9-ccc3-4197-8c4a-9f5cc53eb504/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-11-12 02:31:20,544 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-12 02:31:20,544 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:31:20,544 INFO L85 PathProgramCache]: Analyzing trace with hash -638029491, now seen corresponding path program 14 times [2023-11-12 02:31:20,544 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:31:20,545 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [423138686] [2023-11-12 02:31:20,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:31:20,545 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:31:20,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:31:20,758 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:31:20,759 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:31:20,759 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [423138686] [2023-11-12 02:31:20,759 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [423138686] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:31:20,759 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1477768296] [2023-11-12 02:31:20,759 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-12 02:31:20,760 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:31:20,760 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bbb65a9-ccc3-4197-8c4a-9f5cc53eb504/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:31:20,761 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bbb65a9-ccc3-4197-8c4a-9f5cc53eb504/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:31:20,779 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bbb65a9-ccc3-4197-8c4a-9f5cc53eb504/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-11-12 02:31:20,853 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-12 02:31:20,854 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-12 02:31:20,855 INFO L262 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 11 conjunts are in the unsatisfiable core [2023-11-12 02:31:20,857 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:31:20,992 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:31:20,992 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:31:21,214 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:31:21,214 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1477768296] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 02:31:21,214 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 02:31:21,215 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 8] total 18 [2023-11-12 02:31:21,215 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [406053905] [2023-11-12 02:31:21,215 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 02:31:21,215 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-11-12 02:31:21,216 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:31:21,216 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-11-12 02:31:21,216 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=266, Unknown=0, NotChecked=0, Total=342 [2023-11-12 02:31:21,345 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 150 [2023-11-12 02:31:21,346 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 208 places, 378 transitions, 6682 flow. Second operand has 19 states, 19 states have (on average 62.21052631578947) internal successors, (1182), 19 states have internal predecessors, (1182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:31:21,346 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:31:21,347 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 150 [2023-11-12 02:31:21,347 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:31:22,247 INFO L124 PetriNetUnfolderBase]: 1082/1963 cut-off events. [2023-11-12 02:31:22,247 INFO L125 PetriNetUnfolderBase]: For 34573/34573 co-relation queries the response was YES. [2023-11-12 02:31:22,267 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16053 conditions, 1963 events. 1082/1963 cut-off events. For 34573/34573 co-relation queries the response was YES. Maximal size of possible extension queue 170. Compared 11573 event pairs, 25 based on Foata normal form. 72/2035 useless extension candidates. Maximal degree in co-relation 15731. Up to 1411 conditions per place. [2023-11-12 02:31:22,287 INFO L140 encePairwiseOnDemand]: 143/150 looper letters, 329 selfloop transitions, 136 changer transitions 4/469 dead transitions. [2023-11-12 02:31:22,287 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 227 places, 469 transitions, 8860 flow [2023-11-12 02:31:22,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-11-12 02:31:22,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2023-11-12 02:31:22,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 1366 transitions. [2023-11-12 02:31:22,290 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4336507936507937 [2023-11-12 02:31:22,290 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 1366 transitions. [2023-11-12 02:31:22,290 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 1366 transitions. [2023-11-12 02:31:22,291 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:31:22,291 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 1366 transitions. [2023-11-12 02:31:22,294 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 65.04761904761905) internal successors, (1366), 21 states have internal predecessors, (1366), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:31:22,298 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 150.0) internal successors, (3300), 22 states have internal predecessors, (3300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:31:22,299 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 150.0) internal successors, (3300), 22 states have internal predecessors, (3300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:31:22,299 INFO L175 Difference]: Start difference. First operand has 208 places, 378 transitions, 6682 flow. Second operand 21 states and 1366 transitions. [2023-11-12 02:31:22,299 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 227 places, 469 transitions, 8860 flow [2023-11-12 02:31:22,498 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 219 places, 469 transitions, 8530 flow, removed 49 selfloop flow, removed 8 redundant places. [2023-11-12 02:31:22,508 INFO L231 Difference]: Finished difference. Result has 230 places, 419 transitions, 7728 flow [2023-11-12 02:31:22,508 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=150, PETRI_DIFFERENCE_MINUEND_FLOW=6418, PETRI_DIFFERENCE_MINUEND_PLACES=199, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=378, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=103, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=267, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=7728, PETRI_PLACES=230, PETRI_TRANSITIONS=419} [2023-11-12 02:31:22,509 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 210 predicate places. [2023-11-12 02:31:22,509 INFO L495 AbstractCegarLoop]: Abstraction has has 230 places, 419 transitions, 7728 flow [2023-11-12 02:31:22,509 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 62.21052631578947) internal successors, (1182), 19 states have internal predecessors, (1182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:31:22,509 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:31:22,509 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:31:22,524 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bbb65a9-ccc3-4197-8c4a-9f5cc53eb504/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-11-12 02:31:22,715 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bbb65a9-ccc3-4197-8c4a-9f5cc53eb504/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-11-12 02:31:22,715 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-12 02:31:22,716 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:31:22,716 INFO L85 PathProgramCache]: Analyzing trace with hash -1077985, now seen corresponding path program 15 times [2023-11-12 02:31:22,716 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:31:22,716 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [864882540] [2023-11-12 02:31:22,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:31:22,716 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:31:22,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:31:22,895 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:31:22,896 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:31:22,896 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [864882540] [2023-11-12 02:31:22,896 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [864882540] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:31:22,896 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [623902880] [2023-11-12 02:31:22,896 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-12 02:31:22,896 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:31:22,897 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bbb65a9-ccc3-4197-8c4a-9f5cc53eb504/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:31:22,898 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bbb65a9-ccc3-4197-8c4a-9f5cc53eb504/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:31:22,923 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bbb65a9-ccc3-4197-8c4a-9f5cc53eb504/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-11-12 02:31:22,994 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-12 02:31:22,994 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-12 02:31:22,995 INFO L262 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-12 02:31:22,997 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:31:23,121 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:31:23,121 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:31:23,277 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:31:23,278 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [623902880] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 02:31:23,278 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 02:31:23,278 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 18 [2023-11-12 02:31:23,278 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1365160801] [2023-11-12 02:31:23,278 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 02:31:23,279 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-11-12 02:31:23,279 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:31:23,279 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-11-12 02:31:23,280 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=263, Unknown=0, NotChecked=0, Total=342 [2023-11-12 02:31:23,440 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 150 [2023-11-12 02:31:23,441 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 230 places, 419 transitions, 7728 flow. Second operand has 19 states, 19 states have (on average 61.578947368421055) internal successors, (1170), 19 states have internal predecessors, (1170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:31:23,442 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:31:23,442 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 150 [2023-11-12 02:31:23,442 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:31:24,269 INFO L124 PetriNetUnfolderBase]: 1123/2002 cut-off events. [2023-11-12 02:31:24,269 INFO L125 PetriNetUnfolderBase]: For 29394/29394 co-relation queries the response was YES. [2023-11-12 02:31:24,285 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17092 conditions, 2002 events. 1123/2002 cut-off events. For 29394/29394 co-relation queries the response was YES. Maximal size of possible extension queue 169. Compared 11682 event pairs, 31 based on Foata normal form. 14/2016 useless extension candidates. Maximal degree in co-relation 16697. Up to 1676 conditions per place. [2023-11-12 02:31:24,303 INFO L140 encePairwiseOnDemand]: 143/150 looper letters, 349 selfloop transitions, 127 changer transitions 4/480 dead transitions. [2023-11-12 02:31:24,303 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 243 places, 480 transitions, 9711 flow [2023-11-12 02:31:24,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-12 02:31:24,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-11-12 02:31:24,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 902 transitions. [2023-11-12 02:31:24,306 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42952380952380953 [2023-11-12 02:31:24,306 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 902 transitions. [2023-11-12 02:31:24,306 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 902 transitions. [2023-11-12 02:31:24,307 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:31:24,307 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 902 transitions. [2023-11-12 02:31:24,309 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 64.42857142857143) internal successors, (902), 14 states have internal predecessors, (902), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:31:24,313 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 150.0) internal successors, (2250), 15 states have internal predecessors, (2250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:31:24,313 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 150.0) internal successors, (2250), 15 states have internal predecessors, (2250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:31:24,314 INFO L175 Difference]: Start difference. First operand has 230 places, 419 transitions, 7728 flow. Second operand 14 states and 902 transitions. [2023-11-12 02:31:24,314 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 243 places, 480 transitions, 9711 flow [2023-11-12 02:31:24,604 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 231 places, 480 transitions, 9262 flow, removed 181 selfloop flow, removed 12 redundant places. [2023-11-12 02:31:24,615 INFO L231 Difference]: Finished difference. Result has 231 places, 452 transitions, 8226 flow [2023-11-12 02:31:24,615 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=150, PETRI_DIFFERENCE_MINUEND_FLOW=7335, PETRI_DIFFERENCE_MINUEND_PLACES=218, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=419, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=94, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=325, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=8226, PETRI_PLACES=231, PETRI_TRANSITIONS=452} [2023-11-12 02:31:24,615 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 211 predicate places. [2023-11-12 02:31:24,616 INFO L495 AbstractCegarLoop]: Abstraction has has 231 places, 452 transitions, 8226 flow [2023-11-12 02:31:24,616 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 61.578947368421055) internal successors, (1170), 19 states have internal predecessors, (1170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:31:24,616 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:31:24,616 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:31:24,624 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bbb65a9-ccc3-4197-8c4a-9f5cc53eb504/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2023-11-12 02:31:24,822 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bbb65a9-ccc3-4197-8c4a-9f5cc53eb504/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-11-12 02:31:24,822 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-12 02:31:24,822 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:31:24,823 INFO L85 PathProgramCache]: Analyzing trace with hash 2072395991, now seen corresponding path program 16 times [2023-11-12 02:31:24,823 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:31:24,823 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [886510543] [2023-11-12 02:31:24,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:31:24,823 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:31:24,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:31:25,031 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:31:25,031 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:31:25,031 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [886510543] [2023-11-12 02:31:25,031 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [886510543] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:31:25,032 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1542727474] [2023-11-12 02:31:25,032 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-12 02:31:25,032 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:31:25,032 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bbb65a9-ccc3-4197-8c4a-9f5cc53eb504/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:31:25,036 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bbb65a9-ccc3-4197-8c4a-9f5cc53eb504/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:31:25,055 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bbb65a9-ccc3-4197-8c4a-9f5cc53eb504/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-11-12 02:31:25,122 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-12 02:31:25,122 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-12 02:31:25,123 INFO L262 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-12 02:31:25,125 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:31:25,325 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:31:25,325 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:31:25,475 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:31:25,476 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1542727474] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 02:31:25,476 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 02:31:25,476 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 19 [2023-11-12 02:31:25,476 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [745745573] [2023-11-12 02:31:25,476 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 02:31:25,477 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-11-12 02:31:25,477 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:31:25,478 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-11-12 02:31:25,478 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=270, Unknown=0, NotChecked=0, Total=342 [2023-11-12 02:31:25,664 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 150 [2023-11-12 02:31:25,666 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 231 places, 452 transitions, 8226 flow. Second operand has 19 states, 19 states have (on average 62.05263157894737) internal successors, (1179), 19 states have internal predecessors, (1179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:31:25,666 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:31:25,666 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 150 [2023-11-12 02:31:25,666 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:31:27,560 INFO L124 PetriNetUnfolderBase]: 1614/2847 cut-off events. [2023-11-12 02:31:27,561 INFO L125 PetriNetUnfolderBase]: For 38125/38125 co-relation queries the response was YES. [2023-11-12 02:31:27,593 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23967 conditions, 2847 events. 1614/2847 cut-off events. For 38125/38125 co-relation queries the response was YES. Maximal size of possible extension queue 238. Compared 17537 event pairs, 7 based on Foata normal form. 18/2865 useless extension candidates. Maximal degree in co-relation 23271. Up to 756 conditions per place. [2023-11-12 02:31:27,616 INFO L140 encePairwiseOnDemand]: 143/150 looper letters, 307 selfloop transitions, 497 changer transitions 35/839 dead transitions. [2023-11-12 02:31:27,617 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 272 places, 839 transitions, 15843 flow [2023-11-12 02:31:27,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2023-11-12 02:31:27,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2023-11-12 02:31:27,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 2773 transitions. [2023-11-12 02:31:27,623 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42992248062015503 [2023-11-12 02:31:27,623 INFO L72 ComplementDD]: Start complementDD. Operand 43 states and 2773 transitions. [2023-11-12 02:31:27,623 INFO L73 IsDeterministic]: Start isDeterministic. Operand 43 states and 2773 transitions. [2023-11-12 02:31:27,625 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:31:27,625 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 43 states and 2773 transitions. [2023-11-12 02:31:27,630 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 44 states, 43 states have (on average 64.48837209302326) internal successors, (2773), 43 states have internal predecessors, (2773), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:31:27,640 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 44 states, 44 states have (on average 150.0) internal successors, (6600), 44 states have internal predecessors, (6600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:31:27,642 INFO L81 ComplementDD]: Finished complementDD. Result has 44 states, 44 states have (on average 150.0) internal successors, (6600), 44 states have internal predecessors, (6600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:31:27,643 INFO L175 Difference]: Start difference. First operand has 231 places, 452 transitions, 8226 flow. Second operand 43 states and 2773 transitions. [2023-11-12 02:31:27,643 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 272 places, 839 transitions, 15843 flow [2023-11-12 02:31:27,957 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 266 places, 839 transitions, 15532 flow, removed 123 selfloop flow, removed 6 redundant places. [2023-11-12 02:31:27,974 INFO L231 Difference]: Finished difference. Result has 275 places, 706 transitions, 14447 flow [2023-11-12 02:31:27,975 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=150, PETRI_DIFFERENCE_MINUEND_FLOW=8061, PETRI_DIFFERENCE_MINUEND_PLACES=224, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=452, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=268, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=114, PETRI_DIFFERENCE_SUBTRAHEND_STATES=43, PETRI_FLOW=14447, PETRI_PLACES=275, PETRI_TRANSITIONS=706} [2023-11-12 02:31:27,975 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 255 predicate places. [2023-11-12 02:31:27,975 INFO L495 AbstractCegarLoop]: Abstraction has has 275 places, 706 transitions, 14447 flow [2023-11-12 02:31:27,976 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 62.05263157894737) internal successors, (1179), 19 states have internal predecessors, (1179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:31:27,976 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:31:27,976 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:31:27,981 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bbb65a9-ccc3-4197-8c4a-9f5cc53eb504/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2023-11-12 02:31:28,177 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bbb65a9-ccc3-4197-8c4a-9f5cc53eb504/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-11-12 02:31:28,178 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-12 02:31:28,178 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:31:28,178 INFO L85 PathProgramCache]: Analyzing trace with hash -1312516467, now seen corresponding path program 17 times [2023-11-12 02:31:28,179 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:31:28,179 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1570587559] [2023-11-12 02:31:28,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:31:28,179 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:31:28,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:31:28,372 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:31:28,373 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:31:28,373 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1570587559] [2023-11-12 02:31:28,373 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1570587559] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:31:28,373 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1825659207] [2023-11-12 02:31:28,373 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-12 02:31:28,374 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:31:28,374 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bbb65a9-ccc3-4197-8c4a-9f5cc53eb504/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:31:28,375 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bbb65a9-ccc3-4197-8c4a-9f5cc53eb504/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:31:28,396 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bbb65a9-ccc3-4197-8c4a-9f5cc53eb504/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-11-12 02:31:28,468 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-11-12 02:31:28,469 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-12 02:31:28,470 INFO L262 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 11 conjunts are in the unsatisfiable core [2023-11-12 02:31:28,472 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:31:28,584 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:31:28,584 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:31:28,790 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:31:28,790 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1825659207] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 02:31:28,790 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 02:31:28,790 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 20 [2023-11-12 02:31:28,790 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1582517960] [2023-11-12 02:31:28,790 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 02:31:28,791 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-11-12 02:31:28,791 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:31:28,791 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-11-12 02:31:28,792 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=275, Unknown=0, NotChecked=0, Total=380 [2023-11-12 02:31:28,891 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 150 [2023-11-12 02:31:28,892 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 275 places, 706 transitions, 14447 flow. Second operand has 20 states, 20 states have (on average 61.8) internal successors, (1236), 20 states have internal predecessors, (1236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:31:28,892 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:31:28,892 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 150 [2023-11-12 02:31:28,893 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:31:30,357 INFO L124 PetriNetUnfolderBase]: 1781/3030 cut-off events. [2023-11-12 02:31:30,357 INFO L125 PetriNetUnfolderBase]: For 45456/45456 co-relation queries the response was YES. [2023-11-12 02:31:30,378 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28382 conditions, 3030 events. 1781/3030 cut-off events. For 45456/45456 co-relation queries the response was YES. Maximal size of possible extension queue 250. Compared 18226 event pairs, 175 based on Foata normal form. 40/3070 useless extension candidates. Maximal degree in co-relation 27664. Up to 1426 conditions per place. [2023-11-12 02:31:30,401 INFO L140 encePairwiseOnDemand]: 143/150 looper letters, 233 selfloop transitions, 624 changer transitions 6/863 dead transitions. [2023-11-12 02:31:30,402 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 299 places, 863 transitions, 18992 flow [2023-11-12 02:31:30,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-11-12 02:31:30,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2023-11-12 02:31:30,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 1735 transitions. [2023-11-12 02:31:30,406 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4283950617283951 [2023-11-12 02:31:30,406 INFO L72 ComplementDD]: Start complementDD. Operand 27 states and 1735 transitions. [2023-11-12 02:31:30,406 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 1735 transitions. [2023-11-12 02:31:30,407 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:31:30,407 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 27 states and 1735 transitions. [2023-11-12 02:31:30,410 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 28 states, 27 states have (on average 64.25925925925925) internal successors, (1735), 27 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) [2023-11-12 02:31:30,415 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 28 states, 28 states have (on average 150.0) internal successors, (4200), 28 states have internal predecessors, (4200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:31:30,416 INFO L81 ComplementDD]: Finished complementDD. Result has 28 states, 28 states have (on average 150.0) internal successors, (4200), 28 states have internal predecessors, (4200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:31:30,416 INFO L175 Difference]: Start difference. First operand has 275 places, 706 transitions, 14447 flow. Second operand 27 states and 1735 transitions. [2023-11-12 02:31:30,416 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 299 places, 863 transitions, 18992 flow [2023-11-12 02:31:30,938 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 291 places, 863 transitions, 17974 flow, removed 382 selfloop flow, removed 8 redundant places. [2023-11-12 02:31:30,956 INFO L231 Difference]: Finished difference. Result has 296 places, 810 transitions, 17269 flow [2023-11-12 02:31:30,956 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=150, PETRI_DIFFERENCE_MINUEND_FLOW=13690, PETRI_DIFFERENCE_MINUEND_PLACES=265, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=706, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=527, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=177, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=17269, PETRI_PLACES=296, PETRI_TRANSITIONS=810} [2023-11-12 02:31:30,957 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 276 predicate places. [2023-11-12 02:31:30,957 INFO L495 AbstractCegarLoop]: Abstraction has has 296 places, 810 transitions, 17269 flow [2023-11-12 02:31:30,957 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 61.8) internal successors, (1236), 20 states have internal predecessors, (1236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:31:30,957 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:31:30,957 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:31:30,964 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bbb65a9-ccc3-4197-8c4a-9f5cc53eb504/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2023-11-12 02:31:31,158 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bbb65a9-ccc3-4197-8c4a-9f5cc53eb504/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:31:31,158 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-12 02:31:31,158 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:31:31,159 INFO L85 PathProgramCache]: Analyzing trace with hash 610451815, now seen corresponding path program 18 times [2023-11-12 02:31:31,159 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:31:31,159 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [535062373] [2023-11-12 02:31:31,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:31:31,159 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:31:31,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:31:31,347 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:31:31,347 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:31:31,350 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [535062373] [2023-11-12 02:31:31,350 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [535062373] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:31:31,350 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2108093578] [2023-11-12 02:31:31,351 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-12 02:31:31,351 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:31:31,351 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bbb65a9-ccc3-4197-8c4a-9f5cc53eb504/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:31:31,352 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bbb65a9-ccc3-4197-8c4a-9f5cc53eb504/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:31:31,375 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bbb65a9-ccc3-4197-8c4a-9f5cc53eb504/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-11-12 02:31:31,450 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-11-12 02:31:31,450 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-12 02:31:31,451 INFO L262 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-12 02:31:31,453 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:31:31,553 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:31:31,553 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:31:31,808 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:31:31,808 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2108093578] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 02:31:31,808 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 02:31:31,808 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 21 [2023-11-12 02:31:31,809 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [242705777] [2023-11-12 02:31:31,809 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 02:31:31,809 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-11-12 02:31:31,809 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:31:31,810 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-11-12 02:31:31,810 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=319, Unknown=0, NotChecked=0, Total=420 [2023-11-12 02:31:31,942 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 150 [2023-11-12 02:31:31,944 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 296 places, 810 transitions, 17269 flow. Second operand has 21 states, 21 states have (on average 61.714285714285715) internal successors, (1296), 21 states have internal predecessors, (1296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:31:31,944 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:31:31,944 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 150 [2023-11-12 02:31:31,944 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:31:33,932 INFO L124 PetriNetUnfolderBase]: 1897/3262 cut-off events. [2023-11-12 02:31:33,932 INFO L125 PetriNetUnfolderBase]: For 51360/51360 co-relation queries the response was YES. [2023-11-12 02:31:33,960 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30437 conditions, 3262 events. 1897/3262 cut-off events. For 51360/51360 co-relation queries the response was YES. Maximal size of possible extension queue 261. Compared 20027 event pairs, 127 based on Foata normal form. 52/3314 useless extension candidates. Maximal degree in co-relation 30167. Up to 1076 conditions per place. [2023-11-12 02:31:33,983 INFO L140 encePairwiseOnDemand]: 143/150 looper letters, 223 selfloop transitions, 679 changer transitions 16/918 dead transitions. [2023-11-12 02:31:33,983 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 322 places, 918 transitions, 20496 flow [2023-11-12 02:31:33,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-11-12 02:31:33,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2023-11-12 02:31:33,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 1812 transitions. [2023-11-12 02:31:33,988 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43142857142857144 [2023-11-12 02:31:33,988 INFO L72 ComplementDD]: Start complementDD. Operand 28 states and 1812 transitions. [2023-11-12 02:31:33,988 INFO L73 IsDeterministic]: Start isDeterministic. Operand 28 states and 1812 transitions. [2023-11-12 02:31:33,989 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:31:33,989 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 28 states and 1812 transitions. [2023-11-12 02:31:33,993 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 29 states, 28 states have (on average 64.71428571428571) internal successors, (1812), 28 states have internal predecessors, (1812), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:31:34,001 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 29 states, 29 states have (on average 150.0) internal successors, (4350), 29 states have internal predecessors, (4350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:31:34,002 INFO L81 ComplementDD]: Finished complementDD. Result has 29 states, 29 states have (on average 150.0) internal successors, (4350), 29 states have internal predecessors, (4350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:31:34,002 INFO L175 Difference]: Start difference. First operand has 296 places, 810 transitions, 17269 flow. Second operand 28 states and 1812 transitions. [2023-11-12 02:31:34,002 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 322 places, 918 transitions, 20496 flow [2023-11-12 02:31:34,566 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 314 places, 918 transitions, 19331 flow, removed 202 selfloop flow, removed 8 redundant places. [2023-11-12 02:31:34,590 INFO L231 Difference]: Finished difference. Result has 322 places, 844 transitions, 18458 flow [2023-11-12 02:31:34,591 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=150, PETRI_DIFFERENCE_MINUEND_FLOW=15954, PETRI_DIFFERENCE_MINUEND_PLACES=287, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=798, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=634, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=161, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=18458, PETRI_PLACES=322, PETRI_TRANSITIONS=844} [2023-11-12 02:31:34,591 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 302 predicate places. [2023-11-12 02:31:34,592 INFO L495 AbstractCegarLoop]: Abstraction has has 322 places, 844 transitions, 18458 flow [2023-11-12 02:31:34,592 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 61.714285714285715) internal successors, (1296), 21 states have internal predecessors, (1296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:31:34,592 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:31:34,592 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:31:34,600 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bbb65a9-ccc3-4197-8c4a-9f5cc53eb504/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2023-11-12 02:31:34,797 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bbb65a9-ccc3-4197-8c4a-9f5cc53eb504/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:31:34,797 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-12 02:31:34,798 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:31:34,798 INFO L85 PathProgramCache]: Analyzing trace with hash 1959912189, now seen corresponding path program 19 times [2023-11-12 02:31:34,798 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:31:34,798 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1274613066] [2023-11-12 02:31:34,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:31:34,798 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:31:34,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:31:35,074 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:31:35,075 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:31:35,075 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1274613066] [2023-11-12 02:31:35,075 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1274613066] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:31:35,075 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [4274670] [2023-11-12 02:31:35,075 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-12 02:31:35,075 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:31:35,076 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bbb65a9-ccc3-4197-8c4a-9f5cc53eb504/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:31:35,080 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bbb65a9-ccc3-4197-8c4a-9f5cc53eb504/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:31:35,107 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bbb65a9-ccc3-4197-8c4a-9f5cc53eb504/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-11-12 02:31:35,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:31:35,174 INFO L262 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-12 02:31:35,176 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:31:35,285 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:31:35,286 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:31:35,503 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:31:35,504 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [4274670] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 02:31:35,504 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 02:31:35,505 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 21 [2023-11-12 02:31:35,506 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1363267146] [2023-11-12 02:31:35,506 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 02:31:35,506 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-11-12 02:31:35,506 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:31:35,507 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-11-12 02:31:35,507 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=319, Unknown=0, NotChecked=0, Total=420 [2023-11-12 02:31:35,670 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 150 [2023-11-12 02:31:35,672 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 322 places, 844 transitions, 18458 flow. Second operand has 21 states, 21 states have (on average 61.95238095238095) internal successors, (1301), 21 states have internal predecessors, (1301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:31:35,672 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:31:35,672 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 150 [2023-11-12 02:31:35,672 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand