./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 0e0057cc 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_91c24fb8-60ba-4595-8b29-b825520c5f1b/bin/uautomizer-verify-BQ2R08f2Ya/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91c24fb8-60ba-4595-8b29-b825520c5f1b/bin/uautomizer-verify-BQ2R08f2Ya/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91c24fb8-60ba-4595-8b29-b825520c5f1b/bin/uautomizer-verify-BQ2R08f2Ya/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91c24fb8-60ba-4595-8b29-b825520c5f1b/bin/uautomizer-verify-BQ2R08f2Ya/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/popl20-nonblocking-cntr.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91c24fb8-60ba-4595-8b29-b825520c5f1b/bin/uautomizer-verify-BQ2R08f2Ya/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91c24fb8-60ba-4595-8b29-b825520c5f1b/bin/uautomizer-verify-BQ2R08f2Ya --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 0.2.4-dev-0e0057c [2023-11-29 05:20:08,581 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-29 05:20:08,642 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91c24fb8-60ba-4595-8b29-b825520c5f1b/bin/uautomizer-verify-BQ2R08f2Ya/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-29 05:20:08,648 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-29 05:20:08,648 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-29 05:20:08,674 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-29 05:20:08,674 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-29 05:20:08,675 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-29 05:20:08,675 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-29 05:20:08,676 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-29 05:20:08,676 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-29 05:20:08,677 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-29 05:20:08,678 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-29 05:20:08,678 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-29 05:20:08,679 INFO L153 SettingsManager]: * Use SBE=true [2023-11-29 05:20:08,679 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-29 05:20:08,680 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-29 05:20:08,680 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-29 05:20:08,681 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-29 05:20:08,681 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-29 05:20:08,682 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-29 05:20:08,682 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-29 05:20:08,683 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-29 05:20:08,683 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-29 05:20:08,684 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-29 05:20:08,684 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-29 05:20:08,685 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-29 05:20:08,685 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-29 05:20:08,686 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-29 05:20:08,686 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-29 05:20:08,686 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-29 05:20:08,687 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-29 05:20:08,687 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-29 05:20:08,687 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-29 05:20:08,687 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-29 05:20:08,688 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-29 05:20:08,688 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-29 05:20:08,688 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-29 05:20:08,688 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-29 05:20:08,688 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-29 05:20:08,688 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-29 05:20:08,689 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-29 05:20:08,689 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_91c24fb8-60ba-4595-8b29-b825520c5f1b/bin/uautomizer-verify-BQ2R08f2Ya/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91c24fb8-60ba-4595-8b29-b825520c5f1b/bin/uautomizer-verify-BQ2R08f2Ya Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> fe7fc3189e39cd6587b4d7d83621bd29f6e1c085e1b3af197b9abc1746b629ea [2023-11-29 05:20:08,885 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-29 05:20:08,914 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-29 05:20:08,916 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-29 05:20:08,917 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-29 05:20:08,917 INFO L274 PluginConnector]: CDTParser initialized [2023-11-29 05:20:08,918 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91c24fb8-60ba-4595-8b29-b825520c5f1b/bin/uautomizer-verify-BQ2R08f2Ya/../../sv-benchmarks/c/weaver/popl20-nonblocking-cntr.wvr.c [2023-11-29 05:20:11,669 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-29 05:20:11,882 INFO L384 CDTParser]: Found 1 translation units. [2023-11-29 05:20:11,882 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91c24fb8-60ba-4595-8b29-b825520c5f1b/sv-benchmarks/c/weaver/popl20-nonblocking-cntr.wvr.c [2023-11-29 05:20:11,890 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91c24fb8-60ba-4595-8b29-b825520c5f1b/bin/uautomizer-verify-BQ2R08f2Ya/data/07004005f/5aba2f1c27ef4e8e99dab33ba770420a/FLAGa5b1364d1 [2023-11-29 05:20:11,902 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91c24fb8-60ba-4595-8b29-b825520c5f1b/bin/uautomizer-verify-BQ2R08f2Ya/data/07004005f/5aba2f1c27ef4e8e99dab33ba770420a [2023-11-29 05:20:11,904 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-29 05:20:11,906 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-29 05:20:11,907 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-29 05:20:11,907 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-29 05:20:11,911 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-29 05:20:11,912 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 05:20:11" (1/1) ... [2023-11-29 05:20:11,913 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3d3f431f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:20:11, skipping insertion in model container [2023-11-29 05:20:11,914 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 05:20:11" (1/1) ... [2023-11-29 05:20:11,936 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-29 05:20:12,084 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91c24fb8-60ba-4595-8b29-b825520c5f1b/sv-benchmarks/c/weaver/popl20-nonblocking-cntr.wvr.c[2063,2076] [2023-11-29 05:20:12,088 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-29 05:20:12,097 INFO L202 MainTranslator]: Completed pre-run [2023-11-29 05:20:12,115 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_91c24fb8-60ba-4595-8b29-b825520c5f1b/sv-benchmarks/c/weaver/popl20-nonblocking-cntr.wvr.c[2063,2076] [2023-11-29 05:20:12,117 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-29 05:20:12,125 WARN L675 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-11-29 05:20:12,126 WARN L675 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-11-29 05:20:12,132 INFO L206 MainTranslator]: Completed translation [2023-11-29 05:20:12,132 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:20:12 WrapperNode [2023-11-29 05:20:12,133 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-29 05:20:12,134 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-29 05:20:12,134 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-29 05:20:12,134 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-29 05:20:12,140 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:20:12" (1/1) ... [2023-11-29 05:20:12,148 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:20:12" (1/1) ... [2023-11-29 05:20:12,167 INFO L138 Inliner]: procedures = 21, calls = 24, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 53 [2023-11-29 05:20:12,168 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-29 05:20:12,169 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-29 05:20:12,169 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-29 05:20:12,169 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-29 05:20:12,178 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:20:12" (1/1) ... [2023-11-29 05:20:12,179 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:20:12" (1/1) ... [2023-11-29 05:20:12,181 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:20:12" (1/1) ... [2023-11-29 05:20:12,196 INFO L175 MemorySlicer]: Split 6 memory accesses to 3 slices as follows [2, 2, 2]. 33 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0, 0]. The 2 writes are split as follows [0, 1, 1]. [2023-11-29 05:20:12,197 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:20:12" (1/1) ... [2023-11-29 05:20:12,197 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:20:12" (1/1) ... [2023-11-29 05:20:12,202 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:20:12" (1/1) ... [2023-11-29 05:20:12,206 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:20:12" (1/1) ... [2023-11-29 05:20:12,208 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:20:12" (1/1) ... [2023-11-29 05:20:12,209 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:20:12" (1/1) ... [2023-11-29 05:20:12,212 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-29 05:20:12,213 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-29 05:20:12,214 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-29 05:20:12,214 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-29 05:20:12,215 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:20:12" (1/1) ... [2023-11-29 05:20:12,221 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-29 05:20:12,231 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91c24fb8-60ba-4595-8b29-b825520c5f1b/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:20:12,246 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91c24fb8-60ba-4595-8b29-b825520c5f1b/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-29 05:20:12,254 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91c24fb8-60ba-4595-8b29-b825520c5f1b/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-29 05:20:12,282 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-29 05:20:12,283 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-11-29 05:20:12,283 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-11-29 05:20:12,283 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-11-29 05:20:12,283 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-11-29 05:20:12,283 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-29 05:20:12,284 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2023-11-29 05:20:12,284 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2023-11-29 05:20:12,284 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-29 05:20:12,284 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2023-11-29 05:20:12,284 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2023-11-29 05:20:12,284 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2023-11-29 05:20:12,285 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-11-29 05:20:12,285 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-11-29 05:20:12,285 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-29 05:20:12,285 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-29 05:20:12,285 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2023-11-29 05:20:12,286 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2023-11-29 05:20:12,286 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2023-11-29 05:20:12,286 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-29 05:20:12,288 WARN L213 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-29 05:20:12,391 INFO L241 CfgBuilder]: Building ICFG [2023-11-29 05:20:12,392 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-29 05:20:12,562 INFO L282 CfgBuilder]: Performing block encoding [2023-11-29 05:20:12,713 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-29 05:20:12,713 INFO L309 CfgBuilder]: Removed 2 assume(true) statements. [2023-11-29 05:20:12,714 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 05:20:12 BoogieIcfgContainer [2023-11-29 05:20:12,714 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-29 05:20:12,717 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-29 05:20:12,717 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-29 05:20:12,720 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-29 05:20:12,720 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.11 05:20:11" (1/3) ... [2023-11-29 05:20:12,721 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@685ae0a2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 05:20:12, skipping insertion in model container [2023-11-29 05:20:12,721 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:20:12" (2/3) ... [2023-11-29 05:20:12,721 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@685ae0a2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 05:20:12, skipping insertion in model container [2023-11-29 05:20:12,722 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 05:20:12" (3/3) ... [2023-11-29 05:20:12,723 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-nonblocking-cntr.wvr.c [2023-11-29 05:20:12,731 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-11-29 05:20:12,740 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-29 05:20:12,740 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-29 05:20:12,740 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-29 05:20:12,777 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-11-29 05:20:12,807 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 27 places, 22 transitions, 58 flow [2023-11-29 05:20:12,836 INFO L124 PetriNetUnfolderBase]: 2/20 cut-off events. [2023-11-29 05:20:12,837 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-29 05:20:12,840 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29 conditions, 20 events. 2/20 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 18 event pairs, 0 based on Foata normal form. 0/17 useless extension candidates. Maximal degree in co-relation 14. Up to 2 conditions per place. [2023-11-29 05:20:12,840 INFO L82 GeneralOperation]: Start removeDead. Operand has 27 places, 22 transitions, 58 flow [2023-11-29 05:20:12,844 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 24 places, 19 transitions, 50 flow [2023-11-29 05:20:12,856 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-29 05:20:12,863 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;@1bdf941, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-29 05:20:12,864 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-11-29 05:20:12,874 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-29 05:20:12,875 INFO L124 PetriNetUnfolderBase]: 2/18 cut-off events. [2023-11-29 05:20:12,875 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-29 05:20:12,875 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:20:12,876 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:20:12,877 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 05:20:12,882 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:20:12,882 INFO L85 PathProgramCache]: Analyzing trace with hash 2145107019, now seen corresponding path program 1 times [2023-11-29 05:20:12,890 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:20:12,890 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2005848789] [2023-11-29 05:20:12,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:20:12,891 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:20:12,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:20:13,226 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:20:13,226 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:20:13,226 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2005848789] [2023-11-29 05:20:13,227 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2005848789] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 05:20:13,227 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 05:20:13,227 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 05:20:13,229 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2104648026] [2023-11-29 05:20:13,230 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 05:20:13,239 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 05:20:13,245 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:20:13,264 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 05:20:13,264 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-29 05:20:13,275 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 22 [2023-11-29 05:20:13,277 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 24 places, 19 transitions, 50 flow. Second operand has 4 states, 4 states have (on average 8.25) internal successors, (33), 4 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:20:13,278 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:20:13,278 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 22 [2023-11-29 05:20:13,279 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:20:13,374 INFO L124 PetriNetUnfolderBase]: 65/133 cut-off events. [2023-11-29 05:20:13,374 INFO L125 PetriNetUnfolderBase]: For 12/12 co-relation queries the response was YES. [2023-11-29 05:20:13,375 INFO L83 FinitePrefix]: Finished finitePrefix Result has 268 conditions, 133 events. 65/133 cut-off events. For 12/12 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 409 event pairs, 33 based on Foata normal form. 10/138 useless extension candidates. Maximal degree in co-relation 214. Up to 92 conditions per place. [2023-11-29 05:20:13,378 INFO L140 encePairwiseOnDemand]: 18/22 looper letters, 21 selfloop transitions, 3 changer transitions 0/27 dead transitions. [2023-11-29 05:20:13,378 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 27 places, 27 transitions, 117 flow [2023-11-29 05:20:13,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-29 05:20:13,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-29 05:20:13,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 45 transitions. [2023-11-29 05:20:13,389 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5113636363636364 [2023-11-29 05:20:13,390 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 45 transitions. [2023-11-29 05:20:13,390 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 45 transitions. [2023-11-29 05:20:13,391 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:20:13,393 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 45 transitions. [2023-11-29 05:20:13,395 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 11.25) internal successors, (45), 4 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:20:13,398 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 22.0) internal successors, (110), 5 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:20:13,398 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 22.0) internal successors, (110), 5 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:20:13,400 INFO L175 Difference]: Start difference. First operand has 24 places, 19 transitions, 50 flow. Second operand 4 states and 45 transitions. [2023-11-29 05:20:13,401 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 27 places, 27 transitions, 117 flow [2023-11-29 05:20:13,403 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 23 places, 27 transitions, 107 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-11-29 05:20:13,405 INFO L231 Difference]: Finished difference. Result has 24 places, 20 transitions, 56 flow [2023-11-29 05:20:13,407 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=42, PETRI_DIFFERENCE_MINUEND_PLACES=20, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=19, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=56, PETRI_PLACES=24, PETRI_TRANSITIONS=20} [2023-11-29 05:20:13,411 INFO L281 CegarLoopForPetriNet]: 24 programPoint places, 0 predicate places. [2023-11-29 05:20:13,411 INFO L495 AbstractCegarLoop]: Abstraction has has 24 places, 20 transitions, 56 flow [2023-11-29 05:20:13,411 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.25) internal successors, (33), 4 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:20:13,411 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:20:13,412 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:20:13,412 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-29 05:20:13,412 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 05:20:13,413 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:20:13,413 INFO L85 PathProgramCache]: Analyzing trace with hash 1748902405, now seen corresponding path program 1 times [2023-11-29 05:20:13,413 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:20:13,414 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [900884239] [2023-11-29 05:20:13,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:20:13,414 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:20:13,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:20:13,548 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 05:20:13,548 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:20:13,548 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [900884239] [2023-11-29 05:20:13,549 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [900884239] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 05:20:13,549 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 05:20:13,549 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 05:20:13,549 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [170325712] [2023-11-29 05:20:13,549 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 05:20:13,551 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 05:20:13,551 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:20:13,552 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 05:20:13,552 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-29 05:20:13,560 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 22 [2023-11-29 05:20:13,560 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 24 places, 20 transitions, 56 flow. Second operand has 4 states, 4 states have (on average 8.5) internal successors, (34), 4 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:20:13,560 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:20:13,560 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 22 [2023-11-29 05:20:13,561 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:20:13,643 INFO L124 PetriNetUnfolderBase]: 93/183 cut-off events. [2023-11-29 05:20:13,643 INFO L125 PetriNetUnfolderBase]: For 76/76 co-relation queries the response was YES. [2023-11-29 05:20:13,645 INFO L83 FinitePrefix]: Finished finitePrefix Result has 429 conditions, 183 events. 93/183 cut-off events. For 76/76 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 618 event pairs, 45 based on Foata normal form. 10/186 useless extension candidates. Maximal degree in co-relation 106. Up to 116 conditions per place. [2023-11-29 05:20:13,647 INFO L140 encePairwiseOnDemand]: 18/22 looper letters, 23 selfloop transitions, 3 changer transitions 0/29 dead transitions. [2023-11-29 05:20:13,647 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 27 places, 29 transitions, 137 flow [2023-11-29 05:20:13,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-29 05:20:13,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-29 05:20:13,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 45 transitions. [2023-11-29 05:20:13,648 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5113636363636364 [2023-11-29 05:20:13,649 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 45 transitions. [2023-11-29 05:20:13,649 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 45 transitions. [2023-11-29 05:20:13,649 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:20:13,649 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 45 transitions. [2023-11-29 05:20:13,650 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 11.25) internal successors, (45), 4 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:20:13,651 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 22.0) internal successors, (110), 5 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:20:13,651 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 22.0) internal successors, (110), 5 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:20:13,651 INFO L175 Difference]: Start difference. First operand has 24 places, 20 transitions, 56 flow. Second operand 4 states and 45 transitions. [2023-11-29 05:20:13,652 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 27 places, 29 transitions, 137 flow [2023-11-29 05:20:13,653 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 25 places, 29 transitions, 131 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-29 05:20:13,654 INFO L231 Difference]: Finished difference. Result has 26 places, 21 transitions, 66 flow [2023-11-29 05:20:13,654 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=52, PETRI_DIFFERENCE_MINUEND_PLACES=22, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=20, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=66, PETRI_PLACES=26, PETRI_TRANSITIONS=21} [2023-11-29 05:20:13,655 INFO L281 CegarLoopForPetriNet]: 24 programPoint places, 2 predicate places. [2023-11-29 05:20:13,655 INFO L495 AbstractCegarLoop]: Abstraction has has 26 places, 21 transitions, 66 flow [2023-11-29 05:20:13,656 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.5) internal successors, (34), 4 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:20:13,656 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:20:13,656 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:20:13,656 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-29 05:20:13,657 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 05:20:13,657 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:20:13,657 INFO L85 PathProgramCache]: Analyzing trace with hash 737058305, now seen corresponding path program 1 times [2023-11-29 05:20:13,658 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:20:13,658 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [267367373] [2023-11-29 05:20:13,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:20:13,658 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:20:13,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:20:13,818 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 05:20:13,818 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:20:13,818 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [267367373] [2023-11-29 05:20:13,818 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [267367373] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:20:13,819 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [697851710] [2023-11-29 05:20:13,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:20:13,819 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:20:13,819 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91c24fb8-60ba-4595-8b29-b825520c5f1b/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:20:13,836 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91c24fb8-60ba-4595-8b29-b825520c5f1b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:20:13,837 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91c24fb8-60ba-4595-8b29-b825520c5f1b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-29 05:20:13,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:20:13,915 INFO L262 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-29 05:20:13,920 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:20:13,972 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 05:20:13,972 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:20:14,226 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:20:14,226 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [697851710] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-29 05:20:14,227 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-29 05:20:14,227 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [3, 3] total 5 [2023-11-29 05:20:14,227 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [363318405] [2023-11-29 05:20:14,227 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 05:20:14,228 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-29 05:20:14,228 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:20:14,228 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-29 05:20:14,229 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-11-29 05:20:14,229 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 22 [2023-11-29 05:20:14,229 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 26 places, 21 transitions, 66 flow. Second operand has 5 states, 5 states have (on average 8.2) internal successors, (41), 5 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:20:14,229 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:20:14,229 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 22 [2023-11-29 05:20:14,229 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:20:14,341 INFO L124 PetriNetUnfolderBase]: 163/327 cut-off events. [2023-11-29 05:20:14,341 INFO L125 PetriNetUnfolderBase]: For 132/132 co-relation queries the response was YES. [2023-11-29 05:20:14,343 INFO L83 FinitePrefix]: Finished finitePrefix Result has 815 conditions, 327 events. 163/327 cut-off events. For 132/132 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 1258 event pairs, 23 based on Foata normal form. 1/323 useless extension candidates. Maximal degree in co-relation 235. Up to 103 conditions per place. [2023-11-29 05:20:14,345 INFO L140 encePairwiseOnDemand]: 18/22 looper letters, 37 selfloop transitions, 5 changer transitions 4/49 dead transitions. [2023-11-29 05:20:14,346 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 29 places, 49 transitions, 247 flow [2023-11-29 05:20:14,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-29 05:20:14,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-29 05:20:14,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 62 transitions. [2023-11-29 05:20:14,347 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7045454545454546 [2023-11-29 05:20:14,347 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 62 transitions. [2023-11-29 05:20:14,347 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 62 transitions. [2023-11-29 05:20:14,348 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:20:14,348 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 62 transitions. [2023-11-29 05:20:14,349 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 15.5) internal successors, (62), 4 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:20:14,349 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 22.0) internal successors, (110), 5 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:20:14,350 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 22.0) internal successors, (110), 5 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:20:14,350 INFO L175 Difference]: Start difference. First operand has 26 places, 21 transitions, 66 flow. Second operand 4 states and 62 transitions. [2023-11-29 05:20:14,350 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 29 places, 49 transitions, 247 flow [2023-11-29 05:20:14,351 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 27 places, 49 transitions, 242 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-29 05:20:14,353 INFO L231 Difference]: Finished difference. Result has 29 places, 25 transitions, 100 flow [2023-11-29 05:20:14,353 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=62, PETRI_DIFFERENCE_MINUEND_PLACES=24, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=21, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=100, PETRI_PLACES=29, PETRI_TRANSITIONS=25} [2023-11-29 05:20:14,354 INFO L281 CegarLoopForPetriNet]: 24 programPoint places, 5 predicate places. [2023-11-29 05:20:14,354 INFO L495 AbstractCegarLoop]: Abstraction has has 29 places, 25 transitions, 100 flow [2023-11-29 05:20:14,354 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.2) internal successors, (41), 5 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:20:14,354 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:20:14,354 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:20:14,365 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91c24fb8-60ba-4595-8b29-b825520c5f1b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-29 05:20:14,560 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91c24fb8-60ba-4595-8b29-b825520c5f1b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:20:14,560 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 05:20:14,560 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:20:14,561 INFO L85 PathProgramCache]: Analyzing trace with hash 839591217, now seen corresponding path program 2 times [2023-11-29 05:20:14,561 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:20:14,561 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1112145726] [2023-11-29 05:20:14,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:20:14,561 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:20:14,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:20:14,674 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 05:20:14,674 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:20:14,674 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1112145726] [2023-11-29 05:20:14,674 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1112145726] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:20:14,675 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [106184328] [2023-11-29 05:20:14,675 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 05:20:14,675 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:20:14,675 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91c24fb8-60ba-4595-8b29-b825520c5f1b/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:20:14,676 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91c24fb8-60ba-4595-8b29-b825520c5f1b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:20:14,692 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91c24fb8-60ba-4595-8b29-b825520c5f1b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-29 05:20:14,764 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 05:20:14,764 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 05:20:14,765 INFO L262 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-29 05:20:14,767 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:20:14,841 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 05:20:14,841 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:20:15,007 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 05:20:15,007 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [106184328] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:20:15,007 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 05:20:15,007 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 9 [2023-11-29 05:20:15,008 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [333729207] [2023-11-29 05:20:15,008 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 05:20:15,008 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-29 05:20:15,009 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:20:15,009 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-29 05:20:15,010 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2023-11-29 05:20:15,029 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 22 [2023-11-29 05:20:15,029 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 29 places, 25 transitions, 100 flow. Second operand has 10 states, 10 states have (on average 7.5) internal successors, (75), 10 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:20:15,029 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:20:15,029 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 22 [2023-11-29 05:20:15,030 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:20:15,226 INFO L124 PetriNetUnfolderBase]: 309/577 cut-off events. [2023-11-29 05:20:15,226 INFO L125 PetriNetUnfolderBase]: For 414/414 co-relation queries the response was YES. [2023-11-29 05:20:15,228 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1599 conditions, 577 events. 309/577 cut-off events. For 414/414 co-relation queries the response was YES. Maximal size of possible extension queue 36. Compared 2432 event pairs, 37 based on Foata normal form. 20/596 useless extension candidates. Maximal degree in co-relation 507. Up to 266 conditions per place. [2023-11-29 05:20:15,231 INFO L140 encePairwiseOnDemand]: 16/22 looper letters, 43 selfloop transitions, 13 changer transitions 0/58 dead transitions. [2023-11-29 05:20:15,231 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 34 places, 58 transitions, 347 flow [2023-11-29 05:20:15,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-29 05:20:15,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-29 05:20:15,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 67 transitions. [2023-11-29 05:20:15,232 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5075757575757576 [2023-11-29 05:20:15,232 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 67 transitions. [2023-11-29 05:20:15,233 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 67 transitions. [2023-11-29 05:20:15,233 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:20:15,233 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 67 transitions. [2023-11-29 05:20:15,234 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 11.166666666666666) internal successors, (67), 6 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:20:15,234 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 22.0) internal successors, (154), 7 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:20:15,235 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 22.0) internal successors, (154), 7 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:20:15,235 INFO L175 Difference]: Start difference. First operand has 29 places, 25 transitions, 100 flow. Second operand 6 states and 67 transitions. [2023-11-29 05:20:15,235 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 34 places, 58 transitions, 347 flow [2023-11-29 05:20:15,237 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 58 transitions, 347 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-29 05:20:15,239 INFO L231 Difference]: Finished difference. Result has 38 places, 35 transitions, 221 flow [2023-11-29 05:20:15,239 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=100, PETRI_DIFFERENCE_MINUEND_PLACES=29, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=221, PETRI_PLACES=38, PETRI_TRANSITIONS=35} [2023-11-29 05:20:15,240 INFO L281 CegarLoopForPetriNet]: 24 programPoint places, 14 predicate places. [2023-11-29 05:20:15,240 INFO L495 AbstractCegarLoop]: Abstraction has has 38 places, 35 transitions, 221 flow [2023-11-29 05:20:15,240 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.5) internal successors, (75), 10 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:20:15,241 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:20:15,241 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:20:15,245 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91c24fb8-60ba-4595-8b29-b825520c5f1b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-29 05:20:15,441 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91c24fb8-60ba-4595-8b29-b825520c5f1b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:20:15,442 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 05:20:15,442 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:20:15,442 INFO L85 PathProgramCache]: Analyzing trace with hash -2147149867, now seen corresponding path program 3 times [2023-11-29 05:20:15,442 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:20:15,442 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1773245955] [2023-11-29 05:20:15,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:20:15,443 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:20:15,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:20:15,607 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:20:15,607 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:20:15,607 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1773245955] [2023-11-29 05:20:15,608 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1773245955] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:20:15,608 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2044031122] [2023-11-29 05:20:15,608 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-29 05:20:15,608 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:20:15,608 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91c24fb8-60ba-4595-8b29-b825520c5f1b/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:20:15,611 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91c24fb8-60ba-4595-8b29-b825520c5f1b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:20:15,614 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91c24fb8-60ba-4595-8b29-b825520c5f1b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-29 05:20:15,685 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-11-29 05:20:15,685 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 05:20:15,686 INFO L262 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-29 05:20:15,688 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:20:15,830 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:20:15,831 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:20:15,980 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 05:20:15,980 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2044031122] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:20:15,980 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 05:20:15,981 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 19 [2023-11-29 05:20:15,981 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1798155426] [2023-11-29 05:20:15,981 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 05:20:15,981 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-11-29 05:20:15,982 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:20:15,982 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-11-29 05:20:15,983 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=250, Unknown=0, NotChecked=0, Total=342 [2023-11-29 05:20:15,989 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2023-11-29 05:20:15,990 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 35 transitions, 221 flow. Second operand has 19 states, 19 states have (on average 5.631578947368421) internal successors, (107), 19 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:20:15,990 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:20:15,990 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2023-11-29 05:20:15,990 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:20:16,909 INFO L124 PetriNetUnfolderBase]: 1005/1705 cut-off events. [2023-11-29 05:20:16,909 INFO L125 PetriNetUnfolderBase]: For 2664/2664 co-relation queries the response was YES. [2023-11-29 05:20:16,915 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5728 conditions, 1705 events. 1005/1705 cut-off events. For 2664/2664 co-relation queries the response was YES. Maximal size of possible extension queue 83. Compared 8130 event pairs, 31 based on Foata normal form. 44/1749 useless extension candidates. Maximal degree in co-relation 2861. Up to 317 conditions per place. [2023-11-29 05:20:16,927 INFO L140 encePairwiseOnDemand]: 12/22 looper letters, 130 selfloop transitions, 119 changer transitions 5/255 dead transitions. [2023-11-29 05:20:16,927 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 255 transitions, 1861 flow [2023-11-29 05:20:16,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2023-11-29 05:20:16,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2023-11-29 05:20:16,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 302 transitions. [2023-11-29 05:20:16,932 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3813131313131313 [2023-11-29 05:20:16,932 INFO L72 ComplementDD]: Start complementDD. Operand 36 states and 302 transitions. [2023-11-29 05:20:16,932 INFO L73 IsDeterministic]: Start isDeterministic. Operand 36 states and 302 transitions. [2023-11-29 05:20:16,933 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:20:16,933 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 36 states and 302 transitions. [2023-11-29 05:20:16,935 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 37 states, 36 states have (on average 8.38888888888889) internal successors, (302), 36 states have internal predecessors, (302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:20:16,938 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 37 states, 37 states have (on average 22.0) internal successors, (814), 37 states have internal predecessors, (814), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:20:16,939 INFO L81 ComplementDD]: Finished complementDD. Result has 37 states, 37 states have (on average 22.0) internal successors, (814), 37 states have internal predecessors, (814), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:20:16,939 INFO L175 Difference]: Start difference. First operand has 38 places, 35 transitions, 221 flow. Second operand 36 states and 302 transitions. [2023-11-29 05:20:16,939 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 255 transitions, 1861 flow [2023-11-29 05:20:16,948 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 255 transitions, 1849 flow, removed 6 selfloop flow, removed 0 redundant places. [2023-11-29 05:20:16,954 INFO L231 Difference]: Finished difference. Result has 93 places, 154 transitions, 1416 flow [2023-11-29 05:20:16,954 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=217, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=13, PETRI_DIFFERENCE_SUBTRAHEND_STATES=36, PETRI_FLOW=1416, PETRI_PLACES=93, PETRI_TRANSITIONS=154} [2023-11-29 05:20:16,955 INFO L281 CegarLoopForPetriNet]: 24 programPoint places, 69 predicate places. [2023-11-29 05:20:16,955 INFO L495 AbstractCegarLoop]: Abstraction has has 93 places, 154 transitions, 1416 flow [2023-11-29 05:20:16,955 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 5.631578947368421) internal successors, (107), 19 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:20:16,955 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:20:16,956 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:20:16,961 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91c24fb8-60ba-4595-8b29-b825520c5f1b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-11-29 05:20:17,160 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91c24fb8-60ba-4595-8b29-b825520c5f1b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:20:17,160 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 05:20:17,161 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:20:17,161 INFO L85 PathProgramCache]: Analyzing trace with hash 1319882767, now seen corresponding path program 4 times [2023-11-29 05:20:17,161 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:20:17,161 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [694482145] [2023-11-29 05:20:17,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:20:17,161 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:20:17,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:20:17,318 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:20:17,319 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:20:17,319 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [694482145] [2023-11-29 05:20:17,319 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [694482145] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:20:17,319 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [435109542] [2023-11-29 05:20:17,319 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-29 05:20:17,319 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:20:17,320 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91c24fb8-60ba-4595-8b29-b825520c5f1b/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:20:17,321 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91c24fb8-60ba-4595-8b29-b825520c5f1b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:20:17,323 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91c24fb8-60ba-4595-8b29-b825520c5f1b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-29 05:20:17,391 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-29 05:20:17,391 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 05:20:17,392 INFO L262 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-29 05:20:17,394 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:20:17,506 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:20:17,506 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:20:17,588 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 05:20:17,588 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [435109542] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:20:17,589 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 05:20:17,589 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 6] total 15 [2023-11-29 05:20:17,589 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2045733267] [2023-11-29 05:20:17,589 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 05:20:17,590 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-29 05:20:17,590 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:20:17,591 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-29 05:20:17,591 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2023-11-29 05:20:17,594 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2023-11-29 05:20:17,594 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 154 transitions, 1416 flow. Second operand has 15 states, 15 states have (on average 5.733333333333333) internal successors, (86), 15 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:20:17,595 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:20:17,595 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2023-11-29 05:20:17,595 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:20:18,421 INFO L124 PetriNetUnfolderBase]: 1254/2162 cut-off events. [2023-11-29 05:20:18,422 INFO L125 PetriNetUnfolderBase]: For 17344/17344 co-relation queries the response was YES. [2023-11-29 05:20:18,430 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11668 conditions, 2162 events. 1254/2162 cut-off events. For 17344/17344 co-relation queries the response was YES. Maximal size of possible extension queue 113. Compared 11059 event pairs, 74 based on Foata normal form. 44/2206 useless extension candidates. Maximal degree in co-relation 10174. Up to 744 conditions per place. [2023-11-29 05:20:18,449 INFO L140 encePairwiseOnDemand]: 12/22 looper letters, 182 selfloop transitions, 122 changer transitions 6/311 dead transitions. [2023-11-29 05:20:18,450 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 116 places, 311 transitions, 3449 flow [2023-11-29 05:20:18,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-11-29 05:20:18,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2023-11-29 05:20:18,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 222 transitions. [2023-11-29 05:20:18,452 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42045454545454547 [2023-11-29 05:20:18,452 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 222 transitions. [2023-11-29 05:20:18,452 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 222 transitions. [2023-11-29 05:20:18,452 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:20:18,452 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 222 transitions. [2023-11-29 05:20:18,454 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 9.25) internal successors, (222), 24 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:20:18,455 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 22.0) internal successors, (550), 25 states have internal predecessors, (550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:20:18,456 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 22.0) internal successors, (550), 25 states have internal predecessors, (550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:20:18,456 INFO L175 Difference]: Start difference. First operand has 93 places, 154 transitions, 1416 flow. Second operand 24 states and 222 transitions. [2023-11-29 05:20:18,456 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 116 places, 311 transitions, 3449 flow [2023-11-29 05:20:18,611 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 115 places, 311 transitions, 3358 flow, removed 45 selfloop flow, removed 1 redundant places. [2023-11-29 05:20:18,619 INFO L231 Difference]: Finished difference. Result has 129 places, 202 transitions, 2324 flow [2023-11-29 05:20:18,619 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=1343, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=154, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=80, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=2324, PETRI_PLACES=129, PETRI_TRANSITIONS=202} [2023-11-29 05:20:18,620 INFO L281 CegarLoopForPetriNet]: 24 programPoint places, 105 predicate places. [2023-11-29 05:20:18,621 INFO L495 AbstractCegarLoop]: Abstraction has has 129 places, 202 transitions, 2324 flow [2023-11-29 05:20:18,621 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 5.733333333333333) internal successors, (86), 15 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:20:18,621 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:20:18,622 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:20:18,627 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91c24fb8-60ba-4595-8b29-b825520c5f1b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-11-29 05:20:18,822 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91c24fb8-60ba-4595-8b29-b825520c5f1b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-11-29 05:20:18,822 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 05:20:18,823 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:20:18,823 INFO L85 PathProgramCache]: Analyzing trace with hash -146207929, now seen corresponding path program 5 times [2023-11-29 05:20:18,823 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:20:18,823 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [818994040] [2023-11-29 05:20:18,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:20:18,823 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:20:18,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:20:18,992 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:20:18,992 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:20:18,993 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [818994040] [2023-11-29 05:20:18,993 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [818994040] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:20:18,993 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [261601920] [2023-11-29 05:20:18,993 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-29 05:20:18,993 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:20:18,993 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91c24fb8-60ba-4595-8b29-b825520c5f1b/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:20:18,995 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91c24fb8-60ba-4595-8b29-b825520c5f1b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:20:19,004 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91c24fb8-60ba-4595-8b29-b825520c5f1b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-29 05:20:19,074 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-11-29 05:20:19,075 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 05:20:19,076 INFO L262 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-29 05:20:19,077 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:20:19,187 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:20:19,187 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:20:19,344 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:20:19,344 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [261601920] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:20:19,344 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 05:20:19,344 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8] total 20 [2023-11-29 05:20:19,344 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [917534480] [2023-11-29 05:20:19,344 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 05:20:19,345 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-11-29 05:20:19,345 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:20:19,346 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-11-29 05:20:19,346 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=294, Unknown=0, NotChecked=0, Total=380 [2023-11-29 05:20:19,370 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2023-11-29 05:20:19,371 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 129 places, 202 transitions, 2324 flow. Second operand has 20 states, 20 states have (on average 5.55) internal successors, (111), 20 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:20:19,371 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:20:19,371 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2023-11-29 05:20:19,371 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:20:20,910 INFO L124 PetriNetUnfolderBase]: 1886/3247 cut-off events. [2023-11-29 05:20:20,910 INFO L125 PetriNetUnfolderBase]: For 50634/50634 co-relation queries the response was YES. [2023-11-29 05:20:20,928 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20942 conditions, 3247 events. 1886/3247 cut-off events. For 50634/50634 co-relation queries the response was YES. Maximal size of possible extension queue 152. Compared 18044 event pairs, 16 based on Foata normal form. 38/3285 useless extension candidates. Maximal degree in co-relation 19229. Up to 560 conditions per place. [2023-11-29 05:20:20,964 INFO L140 encePairwiseOnDemand]: 11/22 looper letters, 239 selfloop transitions, 288 changer transitions 33/561 dead transitions. [2023-11-29 05:20:20,964 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 165 places, 561 transitions, 7047 flow [2023-11-29 05:20:20,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2023-11-29 05:20:20,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2023-11-29 05:20:20,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 330 transitions. [2023-11-29 05:20:20,966 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40540540540540543 [2023-11-29 05:20:20,967 INFO L72 ComplementDD]: Start complementDD. Operand 37 states and 330 transitions. [2023-11-29 05:20:20,967 INFO L73 IsDeterministic]: Start isDeterministic. Operand 37 states and 330 transitions. [2023-11-29 05:20:20,967 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:20:20,967 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 37 states and 330 transitions. [2023-11-29 05:20:20,969 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 38 states, 37 states have (on average 8.91891891891892) internal successors, (330), 37 states have internal predecessors, (330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:20:20,971 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 38 states, 38 states have (on average 22.0) internal successors, (836), 38 states have internal predecessors, (836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:20:20,972 INFO L81 ComplementDD]: Finished complementDD. Result has 38 states, 38 states have (on average 22.0) internal successors, (836), 38 states have internal predecessors, (836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:20:20,972 INFO L175 Difference]: Start difference. First operand has 129 places, 202 transitions, 2324 flow. Second operand 37 states and 330 transitions. [2023-11-29 05:20:20,972 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 165 places, 561 transitions, 7047 flow [2023-11-29 05:20:21,194 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 164 places, 561 transitions, 6753 flow, removed 145 selfloop flow, removed 1 redundant places. [2023-11-29 05:20:21,204 INFO L231 Difference]: Finished difference. Result has 184 places, 360 transitions, 5073 flow [2023-11-29 05:20:21,204 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=2164, PETRI_DIFFERENCE_MINUEND_PLACES=128, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=202, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=130, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=37, PETRI_FLOW=5073, PETRI_PLACES=184, PETRI_TRANSITIONS=360} [2023-11-29 05:20:21,205 INFO L281 CegarLoopForPetriNet]: 24 programPoint places, 160 predicate places. [2023-11-29 05:20:21,205 INFO L495 AbstractCegarLoop]: Abstraction has has 184 places, 360 transitions, 5073 flow [2023-11-29 05:20:21,205 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 5.55) internal successors, (111), 20 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:20:21,205 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:20:21,205 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:20:21,210 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91c24fb8-60ba-4595-8b29-b825520c5f1b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-11-29 05:20:21,406 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91c24fb8-60ba-4595-8b29-b825520c5f1b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2023-11-29 05:20:21,406 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 05:20:21,407 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:20:21,407 INFO L85 PathProgramCache]: Analyzing trace with hash -1346703031, now seen corresponding path program 6 times [2023-11-29 05:20:21,407 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:20:21,407 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [575558187] [2023-11-29 05:20:21,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:20:21,407 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:20:21,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:20:21,532 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:20:21,532 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:20:21,533 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [575558187] [2023-11-29 05:20:21,533 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [575558187] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:20:21,533 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1683803276] [2023-11-29 05:20:21,533 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-29 05:20:21,533 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:20:21,534 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91c24fb8-60ba-4595-8b29-b825520c5f1b/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:20:21,535 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91c24fb8-60ba-4595-8b29-b825520c5f1b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:20:21,540 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91c24fb8-60ba-4595-8b29-b825520c5f1b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-29 05:20:21,609 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2023-11-29 05:20:21,609 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 05:20:21,610 INFO L262 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-29 05:20:21,612 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:20:21,707 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:20:21,707 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:20:21,843 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:20:21,843 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1683803276] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:20:21,843 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 05:20:21,843 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 19 [2023-11-29 05:20:21,843 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1900348709] [2023-11-29 05:20:21,844 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 05:20:21,844 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-11-29 05:20:21,844 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:20:21,845 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-11-29 05:20:21,845 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=249, Unknown=0, NotChecked=0, Total=342 [2023-11-29 05:20:21,883 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2023-11-29 05:20:21,884 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 184 places, 360 transitions, 5073 flow. Second operand has 19 states, 19 states have (on average 5.473684210526316) internal successors, (104), 19 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:20:21,884 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:20:21,884 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2023-11-29 05:20:21,884 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:20:23,375 INFO L124 PetriNetUnfolderBase]: 2363/3997 cut-off events. [2023-11-29 05:20:23,375 INFO L125 PetriNetUnfolderBase]: For 106143/106143 co-relation queries the response was YES. [2023-11-29 05:20:23,393 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31525 conditions, 3997 events. 2363/3997 cut-off events. For 106143/106143 co-relation queries the response was YES. Maximal size of possible extension queue 174. Compared 22768 event pairs, 70 based on Foata normal form. 24/4021 useless extension candidates. Maximal degree in co-relation 30874. Up to 890 conditions per place. [2023-11-29 05:20:23,430 INFO L140 encePairwiseOnDemand]: 13/22 looper letters, 347 selfloop transitions, 298 changer transitions 6/652 dead transitions. [2023-11-29 05:20:23,430 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 211 places, 652 transitions, 10440 flow [2023-11-29 05:20:23,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2023-11-29 05:20:23,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2023-11-29 05:20:23,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 259 transitions. [2023-11-29 05:20:23,433 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3924242424242424 [2023-11-29 05:20:23,433 INFO L72 ComplementDD]: Start complementDD. Operand 30 states and 259 transitions. [2023-11-29 05:20:23,433 INFO L73 IsDeterministic]: Start isDeterministic. Operand 30 states and 259 transitions. [2023-11-29 05:20:23,433 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:20:23,433 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 30 states and 259 transitions. [2023-11-29 05:20:23,434 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 31 states, 30 states have (on average 8.633333333333333) internal successors, (259), 30 states have internal predecessors, (259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:20:23,436 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 31 states, 31 states have (on average 22.0) internal successors, (682), 31 states have internal predecessors, (682), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:20:23,436 INFO L81 ComplementDD]: Finished complementDD. Result has 31 states, 31 states have (on average 22.0) internal successors, (682), 31 states have internal predecessors, (682), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:20:23,437 INFO L175 Difference]: Start difference. First operand has 184 places, 360 transitions, 5073 flow. Second operand 30 states and 259 transitions. [2023-11-29 05:20:23,437 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 211 places, 652 transitions, 10440 flow [2023-11-29 05:20:23,865 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 206 places, 652 transitions, 10031 flow, removed 189 selfloop flow, removed 5 redundant places. [2023-11-29 05:20:23,881 INFO L231 Difference]: Finished difference. Result has 218 places, 504 transitions, 7741 flow [2023-11-29 05:20:23,882 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=4798, PETRI_DIFFERENCE_MINUEND_PLACES=177, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=360, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=173, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=179, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=7741, PETRI_PLACES=218, PETRI_TRANSITIONS=504} [2023-11-29 05:20:23,883 INFO L281 CegarLoopForPetriNet]: 24 programPoint places, 194 predicate places. [2023-11-29 05:20:23,883 INFO L495 AbstractCegarLoop]: Abstraction has has 218 places, 504 transitions, 7741 flow [2023-11-29 05:20:23,883 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 5.473684210526316) internal successors, (104), 19 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:20:23,883 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:20:23,883 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:20:23,888 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91c24fb8-60ba-4595-8b29-b825520c5f1b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-11-29 05:20:24,083 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91c24fb8-60ba-4595-8b29-b825520c5f1b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:20:24,084 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 05:20:24,084 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:20:24,084 INFO L85 PathProgramCache]: Analyzing trace with hash -247895151, now seen corresponding path program 7 times [2023-11-29 05:20:24,084 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:20:24,084 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [427635698] [2023-11-29 05:20:24,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:20:24,085 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:20:24,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:20:24,240 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:20:24,240 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:20:24,240 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [427635698] [2023-11-29 05:20:24,240 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [427635698] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:20:24,240 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [72850337] [2023-11-29 05:20:24,241 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-29 05:20:24,241 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:20:24,241 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91c24fb8-60ba-4595-8b29-b825520c5f1b/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:20:24,243 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91c24fb8-60ba-4595-8b29-b825520c5f1b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:20:24,244 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91c24fb8-60ba-4595-8b29-b825520c5f1b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-29 05:20:24,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:20:24,314 INFO L262 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-29 05:20:24,316 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:20:24,432 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:20:24,432 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:20:24,577 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:20:24,577 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [72850337] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:20:24,577 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 05:20:24,577 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8] total 22 [2023-11-29 05:20:24,577 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1417158220] [2023-11-29 05:20:24,577 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 05:20:24,578 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-11-29 05:20:24,579 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:20:24,579 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-11-29 05:20:24,580 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=357, Unknown=0, NotChecked=0, Total=462 [2023-11-29 05:20:24,601 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2023-11-29 05:20:24,601 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 218 places, 504 transitions, 7741 flow. Second operand has 22 states, 22 states have (on average 5.363636363636363) internal successors, (118), 22 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:20:24,601 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:20:24,601 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2023-11-29 05:20:24,601 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:20:26,274 INFO L124 PetriNetUnfolderBase]: 2801/4749 cut-off events. [2023-11-29 05:20:26,274 INFO L125 PetriNetUnfolderBase]: For 132727/132727 co-relation queries the response was YES. [2023-11-29 05:20:26,296 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38780 conditions, 4749 events. 2801/4749 cut-off events. For 132727/132727 co-relation queries the response was YES. Maximal size of possible extension queue 227. Compared 28354 event pairs, 41 based on Foata normal form. 60/4809 useless extension candidates. Maximal degree in co-relation 38367. Up to 913 conditions per place. [2023-11-29 05:20:26,320 INFO L140 encePairwiseOnDemand]: 12/22 looper letters, 252 selfloop transitions, 501 changer transitions 1/755 dead transitions. [2023-11-29 05:20:26,320 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 243 places, 755 transitions, 12615 flow [2023-11-29 05:20:26,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-11-29 05:20:26,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2023-11-29 05:20:26,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 236 transitions. [2023-11-29 05:20:26,323 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39730639730639733 [2023-11-29 05:20:26,323 INFO L72 ComplementDD]: Start complementDD. Operand 27 states and 236 transitions. [2023-11-29 05:20:26,323 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 236 transitions. [2023-11-29 05:20:26,323 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:20:26,323 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 27 states and 236 transitions. [2023-11-29 05:20:26,324 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 28 states, 27 states have (on average 8.74074074074074) internal successors, (236), 27 states have internal predecessors, (236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:20:26,326 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 28 states, 28 states have (on average 22.0) internal successors, (616), 28 states have internal predecessors, (616), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:20:26,326 INFO L81 ComplementDD]: Finished complementDD. Result has 28 states, 28 states have (on average 22.0) internal successors, (616), 28 states have internal predecessors, (616), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:20:26,326 INFO L175 Difference]: Start difference. First operand has 218 places, 504 transitions, 7741 flow. Second operand 27 states and 236 transitions. [2023-11-29 05:20:26,326 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 243 places, 755 transitions, 12615 flow [2023-11-29 05:20:27,292 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 236 places, 755 transitions, 12000 flow, removed 294 selfloop flow, removed 7 redundant places. [2023-11-29 05:20:27,309 INFO L231 Difference]: Finished difference. Result has 248 places, 646 transitions, 11372 flow [2023-11-29 05:20:27,309 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=7218, PETRI_DIFFERENCE_MINUEND_PLACES=210, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=500, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=359, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=103, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=11372, PETRI_PLACES=248, PETRI_TRANSITIONS=646} [2023-11-29 05:20:27,310 INFO L281 CegarLoopForPetriNet]: 24 programPoint places, 224 predicate places. [2023-11-29 05:20:27,310 INFO L495 AbstractCegarLoop]: Abstraction has has 248 places, 646 transitions, 11372 flow [2023-11-29 05:20:27,311 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 5.363636363636363) internal successors, (118), 22 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:20:27,311 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:20:27,311 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:20:27,316 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91c24fb8-60ba-4595-8b29-b825520c5f1b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-11-29 05:20:27,511 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91c24fb8-60ba-4595-8b29-b825520c5f1b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:20:27,512 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 05:20:27,512 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:20:27,512 INFO L85 PathProgramCache]: Analyzing trace with hash 1872553109, now seen corresponding path program 8 times [2023-11-29 05:20:27,512 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:20:27,512 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [171938932] [2023-11-29 05:20:27,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:20:27,513 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:20:27,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:20:27,655 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:20:27,655 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:20:27,655 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [171938932] [2023-11-29 05:20:27,656 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [171938932] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:20:27,656 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [510180276] [2023-11-29 05:20:27,656 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 05:20:27,656 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:20:27,656 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91c24fb8-60ba-4595-8b29-b825520c5f1b/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:20:27,657 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91c24fb8-60ba-4595-8b29-b825520c5f1b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:20:27,660 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91c24fb8-60ba-4595-8b29-b825520c5f1b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-29 05:20:27,743 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 05:20:27,743 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 05:20:27,744 INFO L262 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-29 05:20:27,746 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:20:27,835 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:20:27,835 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:20:28,022 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:20:28,022 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [510180276] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:20:28,022 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 05:20:28,023 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 19 [2023-11-29 05:20:28,023 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1034324903] [2023-11-29 05:20:28,023 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 05:20:28,024 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-11-29 05:20:28,024 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:20:28,025 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-11-29 05:20:28,025 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=252, Unknown=0, NotChecked=0, Total=342 [2023-11-29 05:20:28,036 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2023-11-29 05:20:28,037 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 248 places, 646 transitions, 11372 flow. Second operand has 19 states, 19 states have (on average 5.473684210526316) internal successors, (104), 19 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:20:28,037 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:20:28,037 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2023-11-29 05:20:28,037 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:20:30,106 INFO L124 PetriNetUnfolderBase]: 2907/4947 cut-off events. [2023-11-29 05:20:30,106 INFO L125 PetriNetUnfolderBase]: For 112008/112008 co-relation queries the response was YES. [2023-11-29 05:20:30,134 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41631 conditions, 4947 events. 2907/4947 cut-off events. For 112008/112008 co-relation queries the response was YES. Maximal size of possible extension queue 241. Compared 29944 event pairs, 37 based on Foata normal form. 40/4987 useless extension candidates. Maximal degree in co-relation 41167. Up to 930 conditions per place. [2023-11-29 05:20:30,165 INFO L140 encePairwiseOnDemand]: 12/22 looper letters, 274 selfloop transitions, 602 changer transitions 4/881 dead transitions. [2023-11-29 05:20:30,165 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 294 places, 881 transitions, 16686 flow [2023-11-29 05:20:30,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2023-11-29 05:20:30,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2023-11-29 05:20:30,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 406 transitions. [2023-11-29 05:20:30,168 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37662337662337664 [2023-11-29 05:20:30,168 INFO L72 ComplementDD]: Start complementDD. Operand 49 states and 406 transitions. [2023-11-29 05:20:30,168 INFO L73 IsDeterministic]: Start isDeterministic. Operand 49 states and 406 transitions. [2023-11-29 05:20:30,169 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:20:30,169 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 49 states and 406 transitions. [2023-11-29 05:20:30,170 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 50 states, 49 states have (on average 8.285714285714286) internal successors, (406), 49 states have internal predecessors, (406), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:20:30,173 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 50 states, 50 states have (on average 22.0) internal successors, (1100), 50 states have internal predecessors, (1100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:20:30,173 INFO L81 ComplementDD]: Finished complementDD. Result has 50 states, 50 states have (on average 22.0) internal successors, (1100), 50 states have internal predecessors, (1100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:20:30,173 INFO L175 Difference]: Start difference. First operand has 248 places, 646 transitions, 11372 flow. Second operand 49 states and 406 transitions. [2023-11-29 05:20:30,173 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 294 places, 881 transitions, 16686 flow [2023-11-29 05:20:30,945 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 282 places, 881 transitions, 16296 flow, removed 99 selfloop flow, removed 12 redundant places. [2023-11-29 05:20:30,962 INFO L231 Difference]: Finished difference. Result has 299 places, 746 transitions, 14804 flow [2023-11-29 05:20:30,963 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=10984, PETRI_DIFFERENCE_MINUEND_PLACES=234, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=641, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=507, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=107, PETRI_DIFFERENCE_SUBTRAHEND_STATES=49, PETRI_FLOW=14804, PETRI_PLACES=299, PETRI_TRANSITIONS=746} [2023-11-29 05:20:30,963 INFO L281 CegarLoopForPetriNet]: 24 programPoint places, 275 predicate places. [2023-11-29 05:20:30,964 INFO L495 AbstractCegarLoop]: Abstraction has has 299 places, 746 transitions, 14804 flow [2023-11-29 05:20:30,964 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 5.473684210526316) internal successors, (104), 19 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:20:30,964 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:20:30,964 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:20:30,969 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91c24fb8-60ba-4595-8b29-b825520c5f1b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2023-11-29 05:20:31,164 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91c24fb8-60ba-4595-8b29-b825520c5f1b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-11-29 05:20:31,165 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 05:20:31,165 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:20:31,165 INFO L85 PathProgramCache]: Analyzing trace with hash -1138138541, now seen corresponding path program 9 times [2023-11-29 05:20:31,166 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:20:31,166 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [596979375] [2023-11-29 05:20:31,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:20:31,166 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:20:31,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:20:31,349 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:20:31,349 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:20:31,349 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [596979375] [2023-11-29 05:20:31,349 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [596979375] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:20:31,349 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1428390636] [2023-11-29 05:20:31,349 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-29 05:20:31,349 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:20:31,350 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91c24fb8-60ba-4595-8b29-b825520c5f1b/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:20:31,350 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91c24fb8-60ba-4595-8b29-b825520c5f1b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:20:31,353 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91c24fb8-60ba-4595-8b29-b825520c5f1b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-29 05:20:31,429 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-11-29 05:20:31,429 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 05:20:31,430 INFO L262 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-29 05:20:31,431 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:20:31,554 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:20:31,554 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:20:31,655 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:20:31,655 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1428390636] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:20:31,656 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 05:20:31,656 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8] total 23 [2023-11-29 05:20:31,656 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1009550635] [2023-11-29 05:20:31,656 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 05:20:31,656 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-11-29 05:20:31,657 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:20:31,657 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-11-29 05:20:31,658 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=392, Unknown=0, NotChecked=0, Total=506 [2023-11-29 05:20:31,663 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2023-11-29 05:20:31,663 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 299 places, 746 transitions, 14804 flow. Second operand has 23 states, 23 states have (on average 5.434782608695652) internal successors, (125), 23 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:20:31,663 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:20:31,663 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2023-11-29 05:20:31,663 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:20:34,301 INFO L124 PetriNetUnfolderBase]: 3821/6488 cut-off events. [2023-11-29 05:20:34,301 INFO L125 PetriNetUnfolderBase]: For 187016/187016 co-relation queries the response was YES. [2023-11-29 05:20:34,338 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59972 conditions, 6488 events. 3821/6488 cut-off events. For 187016/187016 co-relation queries the response was YES. Maximal size of possible extension queue 307. Compared 40239 event pairs, 29 based on Foata normal form. 60/6548 useless extension candidates. Maximal degree in co-relation 59624. Up to 1284 conditions per place. [2023-11-29 05:20:34,439 INFO L140 encePairwiseOnDemand]: 12/22 looper letters, 399 selfloop transitions, 809 changer transitions 0/1209 dead transitions. [2023-11-29 05:20:34,440 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 343 places, 1209 transitions, 25586 flow [2023-11-29 05:20:34,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2023-11-29 05:20:34,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2023-11-29 05:20:34,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 384 transitions. [2023-11-29 05:20:34,442 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3794466403162055 [2023-11-29 05:20:34,442 INFO L72 ComplementDD]: Start complementDD. Operand 46 states and 384 transitions. [2023-11-29 05:20:34,442 INFO L73 IsDeterministic]: Start isDeterministic. Operand 46 states and 384 transitions. [2023-11-29 05:20:34,443 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:20:34,443 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 46 states and 384 transitions. [2023-11-29 05:20:34,445 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 47 states, 46 states have (on average 8.347826086956522) internal successors, (384), 46 states have internal predecessors, (384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:20:34,447 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 47 states, 47 states have (on average 22.0) internal successors, (1034), 47 states have internal predecessors, (1034), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:20:34,448 INFO L81 ComplementDD]: Finished complementDD. Result has 47 states, 47 states have (on average 22.0) internal successors, (1034), 47 states have internal predecessors, (1034), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:20:34,448 INFO L175 Difference]: Start difference. First operand has 299 places, 746 transitions, 14804 flow. Second operand 46 states and 384 transitions. [2023-11-29 05:20:34,448 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 343 places, 1209 transitions, 25586 flow [2023-11-29 05:20:36,284 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 323 places, 1209 transitions, 24671 flow, removed 157 selfloop flow, removed 20 redundant places. [2023-11-29 05:20:36,313 INFO L231 Difference]: Finished difference. Result has 337 places, 1034 transitions, 23043 flow [2023-11-29 05:20:36,314 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=14134, PETRI_DIFFERENCE_MINUEND_PLACES=278, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=746, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=529, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=130, PETRI_DIFFERENCE_SUBTRAHEND_STATES=46, PETRI_FLOW=23043, PETRI_PLACES=337, PETRI_TRANSITIONS=1034} [2023-11-29 05:20:36,315 INFO L281 CegarLoopForPetriNet]: 24 programPoint places, 313 predicate places. [2023-11-29 05:20:36,315 INFO L495 AbstractCegarLoop]: Abstraction has has 337 places, 1034 transitions, 23043 flow [2023-11-29 05:20:36,315 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 5.434782608695652) internal successors, (125), 23 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:20:36,315 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:20:36,315 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:20:36,319 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91c24fb8-60ba-4595-8b29-b825520c5f1b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2023-11-29 05:20:36,515 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91c24fb8-60ba-4595-8b29-b825520c5f1b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:20:36,516 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 05:20:36,516 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:20:36,516 INFO L85 PathProgramCache]: Analyzing trace with hash 498992649, now seen corresponding path program 10 times [2023-11-29 05:20:36,516 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:20:36,516 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [575441958] [2023-11-29 05:20:36,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:20:36,517 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:20:36,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:20:36,677 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:20:36,677 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:20:36,678 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [575441958] [2023-11-29 05:20:36,678 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [575441958] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:20:36,678 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1210232134] [2023-11-29 05:20:36,678 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-29 05:20:36,679 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:20:36,679 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91c24fb8-60ba-4595-8b29-b825520c5f1b/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:20:36,680 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91c24fb8-60ba-4595-8b29-b825520c5f1b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:20:36,711 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91c24fb8-60ba-4595-8b29-b825520c5f1b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-29 05:20:36,777 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-29 05:20:36,777 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 05:20:36,778 INFO L262 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-29 05:20:36,779 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:20:36,866 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:20:36,866 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:20:36,995 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:20:36,996 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1210232134] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:20:36,996 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 05:20:36,996 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 17 [2023-11-29 05:20:36,996 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [198890325] [2023-11-29 05:20:36,996 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 05:20:36,997 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-11-29 05:20:36,997 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:20:36,997 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-11-29 05:20:36,998 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2023-11-29 05:20:37,005 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2023-11-29 05:20:37,006 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 337 places, 1034 transitions, 23043 flow. Second operand has 17 states, 17 states have (on average 5.352941176470588) internal successors, (91), 17 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:20:37,006 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:20:37,006 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2023-11-29 05:20:37,006 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:20:39,812 INFO L124 PetriNetUnfolderBase]: 4058/6828 cut-off events. [2023-11-29 05:20:39,812 INFO L125 PetriNetUnfolderBase]: For 255876/255876 co-relation queries the response was YES. [2023-11-29 05:20:39,863 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70089 conditions, 6828 events. 4058/6828 cut-off events. For 255876/255876 co-relation queries the response was YES. Maximal size of possible extension queue 316. Compared 42376 event pairs, 134 based on Foata normal form. 18/6846 useless extension candidates. Maximal degree in co-relation 69621. Up to 1813 conditions per place. [2023-11-29 05:20:39,903 INFO L140 encePairwiseOnDemand]: 13/22 looper letters, 699 selfloop transitions, 484 changer transitions 12/1196 dead transitions. [2023-11-29 05:20:39,903 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 356 places, 1196 transitions, 28693 flow [2023-11-29 05:20:39,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-11-29 05:20:39,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2023-11-29 05:20:39,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 176 transitions. [2023-11-29 05:20:39,904 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4 [2023-11-29 05:20:39,904 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 176 transitions. [2023-11-29 05:20:39,905 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 176 transitions. [2023-11-29 05:20:39,905 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:20:39,905 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 176 transitions. [2023-11-29 05:20:39,905 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 8.8) internal successors, (176), 20 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:20:39,906 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 22.0) internal successors, (462), 21 states have internal predecessors, (462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:20:39,907 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 22.0) internal successors, (462), 21 states have internal predecessors, (462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:20:39,907 INFO L175 Difference]: Start difference. First operand has 337 places, 1034 transitions, 23043 flow. Second operand 20 states and 176 transitions. [2023-11-29 05:20:39,907 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 356 places, 1196 transitions, 28693 flow [2023-11-29 05:20:42,819 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 343 places, 1196 transitions, 28262 flow, removed 184 selfloop flow, removed 13 redundant places. [2023-11-29 05:20:42,848 INFO L231 Difference]: Finished difference. Result has 349 places, 1083 transitions, 25111 flow [2023-11-29 05:20:42,849 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=22704, PETRI_DIFFERENCE_MINUEND_PLACES=324, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1034, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=438, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=575, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=25111, PETRI_PLACES=349, PETRI_TRANSITIONS=1083} [2023-11-29 05:20:42,849 INFO L281 CegarLoopForPetriNet]: 24 programPoint places, 325 predicate places. [2023-11-29 05:20:42,849 INFO L495 AbstractCegarLoop]: Abstraction has has 349 places, 1083 transitions, 25111 flow [2023-11-29 05:20:42,850 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 5.352941176470588) internal successors, (91), 17 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:20:42,850 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:20:42,850 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:20:42,854 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91c24fb8-60ba-4595-8b29-b825520c5f1b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2023-11-29 05:20:43,050 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91c24fb8-60ba-4595-8b29-b825520c5f1b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:20:43,050 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 05:20:43,051 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:20:43,051 INFO L85 PathProgramCache]: Analyzing trace with hash 1238428457, now seen corresponding path program 11 times [2023-11-29 05:20:43,051 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:20:43,051 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [895593991] [2023-11-29 05:20:43,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:20:43,051 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:20:43,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:20:43,244 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:20:43,244 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:20:43,244 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [895593991] [2023-11-29 05:20:43,245 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [895593991] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:20:43,245 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [234445474] [2023-11-29 05:20:43,245 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-29 05:20:43,245 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:20:43,245 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91c24fb8-60ba-4595-8b29-b825520c5f1b/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:20:43,247 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91c24fb8-60ba-4595-8b29-b825520c5f1b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:20:43,248 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91c24fb8-60ba-4595-8b29-b825520c5f1b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-29 05:20:43,319 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 05:20:43,319 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 05:20:43,320 INFO L262 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-29 05:20:43,321 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:20:43,411 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:20:43,411 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:20:43,505 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:20:43,505 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [234445474] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:20:43,505 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 05:20:43,505 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 19 [2023-11-29 05:20:43,505 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1933051447] [2023-11-29 05:20:43,506 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 05:20:43,506 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-11-29 05:20:43,506 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:20:43,507 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-11-29 05:20:43,507 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=248, Unknown=0, NotChecked=0, Total=342 [2023-11-29 05:20:43,524 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2023-11-29 05:20:43,525 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 349 places, 1083 transitions, 25111 flow. Second operand has 19 states, 19 states have (on average 5.473684210526316) internal successors, (104), 19 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:20:43,525 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:20:43,525 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2023-11-29 05:20:43,525 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:20:47,353 INFO L124 PetriNetUnfolderBase]: 4275/7165 cut-off events. [2023-11-29 05:20:47,353 INFO L125 PetriNetUnfolderBase]: For 271827/271827 co-relation queries the response was YES. [2023-11-29 05:20:47,398 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75011 conditions, 7165 events. 4275/7165 cut-off events. For 271827/271827 co-relation queries the response was YES. Maximal size of possible extension queue 335. Compared 44877 event pairs, 194 based on Foata normal form. 14/7179 useless extension candidates. Maximal degree in co-relation 74603. Up to 6000 conditions per place. [2023-11-29 05:20:47,437 INFO L140 encePairwiseOnDemand]: 13/22 looper letters, 1072 selfloop transitions, 133 changer transitions 3/1209 dead transitions. [2023-11-29 05:20:47,437 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 361 places, 1209 transitions, 30320 flow [2023-11-29 05:20:47,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-11-29 05:20:47,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-11-29 05:20:47,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 142 transitions. [2023-11-29 05:20:47,438 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4034090909090909 [2023-11-29 05:20:47,438 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 142 transitions. [2023-11-29 05:20:47,438 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 142 transitions. [2023-11-29 05:20:47,439 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:20:47,439 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 142 transitions. [2023-11-29 05:20:47,439 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 8.875) internal successors, (142), 16 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:20:47,440 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 22.0) internal successors, (374), 17 states have internal predecessors, (374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:20:47,440 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 22.0) internal successors, (374), 17 states have internal predecessors, (374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:20:47,440 INFO L175 Difference]: Start difference. First operand has 349 places, 1083 transitions, 25111 flow. Second operand 16 states and 142 transitions. [2023-11-29 05:20:47,441 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 361 places, 1209 transitions, 30320 flow [2023-11-29 05:20:51,137 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 351 places, 1209 transitions, 29925 flow, removed 33 selfloop flow, removed 10 redundant places. [2023-11-29 05:20:51,169 INFO L231 Difference]: Finished difference. Result has 358 places, 1138 transitions, 26512 flow [2023-11-29 05:20:51,170 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=24734, PETRI_DIFFERENCE_MINUEND_PLACES=336, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1083, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=86, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=965, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=26512, PETRI_PLACES=358, PETRI_TRANSITIONS=1138} [2023-11-29 05:20:51,171 INFO L281 CegarLoopForPetriNet]: 24 programPoint places, 334 predicate places. [2023-11-29 05:20:51,171 INFO L495 AbstractCegarLoop]: Abstraction has has 358 places, 1138 transitions, 26512 flow [2023-11-29 05:20:51,171 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 5.473684210526316) internal successors, (104), 19 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:20:51,171 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:20:51,171 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:20:51,176 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91c24fb8-60ba-4595-8b29-b825520c5f1b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2023-11-29 05:20:51,372 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91c24fb8-60ba-4595-8b29-b825520c5f1b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:20:51,372 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 05:20:51,372 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:20:51,372 INFO L85 PathProgramCache]: Analyzing trace with hash -1202308953, now seen corresponding path program 12 times [2023-11-29 05:20:51,372 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:20:51,373 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1859444126] [2023-11-29 05:20:51,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:20:51,373 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:20:51,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:20:51,508 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:20:51,508 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:20:51,509 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1859444126] [2023-11-29 05:20:51,509 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1859444126] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:20:51,509 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [941513590] [2023-11-29 05:20:51,509 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-29 05:20:51,509 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:20:51,509 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91c24fb8-60ba-4595-8b29-b825520c5f1b/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:20:51,510 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91c24fb8-60ba-4595-8b29-b825520c5f1b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:20:51,511 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91c24fb8-60ba-4595-8b29-b825520c5f1b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-11-29 05:20:51,574 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-11-29 05:20:51,574 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 05:20:51,575 INFO L262 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-29 05:20:51,577 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:20:51,682 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:20:51,682 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:20:51,794 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:20:51,794 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [941513590] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:20:51,794 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 05:20:51,794 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 21 [2023-11-29 05:20:51,794 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2063460091] [2023-11-29 05:20:51,794 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 05:20:51,795 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-11-29 05:20:51,795 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:20:51,795 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-11-29 05:20:51,796 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=325, Unknown=0, NotChecked=0, Total=420 [2023-11-29 05:20:51,797 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2023-11-29 05:20:51,797 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 358 places, 1138 transitions, 26512 flow. Second operand has 21 states, 21 states have (on average 5.285714285714286) internal successors, (111), 21 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:20:51,797 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:20:51,797 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2023-11-29 05:20:51,798 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:20:56,816 INFO L124 PetriNetUnfolderBase]: 4524/7534 cut-off events. [2023-11-29 05:20:56,816 INFO L125 PetriNetUnfolderBase]: For 309083/309083 co-relation queries the response was YES. [2023-11-29 05:20:56,880 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80626 conditions, 7534 events. 4524/7534 cut-off events. For 309083/309083 co-relation queries the response was YES. Maximal size of possible extension queue 345. Compared 47220 event pairs, 190 based on Foata normal form. 14/7548 useless extension candidates. Maximal degree in co-relation 80215. Up to 5935 conditions per place. [2023-11-29 05:20:56,933 INFO L140 encePairwiseOnDemand]: 13/22 looper letters, 1110 selfloop transitions, 177 changer transitions 11/1299 dead transitions. [2023-11-29 05:20:56,933 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 375 places, 1299 transitions, 32678 flow [2023-11-29 05:20:56,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-11-29 05:20:56,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2023-11-29 05:20:56,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 162 transitions. [2023-11-29 05:20:56,935 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3875598086124402 [2023-11-29 05:20:56,935 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 162 transitions. [2023-11-29 05:20:56,935 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 162 transitions. [2023-11-29 05:20:56,936 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:20:56,936 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 162 transitions. [2023-11-29 05:20:56,937 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 8.526315789473685) internal successors, (162), 19 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:20:56,938 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 22.0) internal successors, (440), 20 states have internal predecessors, (440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:20:56,938 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 22.0) internal successors, (440), 20 states have internal predecessors, (440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:20:56,938 INFO L175 Difference]: Start difference. First operand has 358 places, 1138 transitions, 26512 flow. Second operand 19 states and 162 transitions. [2023-11-29 05:20:56,939 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 375 places, 1299 transitions, 32678 flow [2023-11-29 05:21:01,201 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 367 places, 1299 transitions, 32424 flow, removed 83 selfloop flow, removed 8 redundant places. [2023-11-29 05:21:01,231 INFO L231 Difference]: Finished difference. Result has 374 places, 1187 transitions, 28057 flow [2023-11-29 05:21:01,232 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=26276, PETRI_DIFFERENCE_MINUEND_PLACES=349, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1138, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=136, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=971, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=28057, PETRI_PLACES=374, PETRI_TRANSITIONS=1187} [2023-11-29 05:21:01,233 INFO L281 CegarLoopForPetriNet]: 24 programPoint places, 350 predicate places. [2023-11-29 05:21:01,233 INFO L495 AbstractCegarLoop]: Abstraction has has 374 places, 1187 transitions, 28057 flow [2023-11-29 05:21:01,233 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 5.285714285714286) internal successors, (111), 21 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:21:01,233 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:21:01,233 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:21:01,239 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91c24fb8-60ba-4595-8b29-b825520c5f1b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2023-11-29 05:21:01,433 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91c24fb8-60ba-4595-8b29-b825520c5f1b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:21:01,434 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 05:21:01,434 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:21:01,434 INFO L85 PathProgramCache]: Analyzing trace with hash 1149893637, now seen corresponding path program 13 times [2023-11-29 05:21:01,434 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:21:01,434 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1552080072] [2023-11-29 05:21:01,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:21:01,434 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:21:01,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:21:01,518 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:21:01,518 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:21:01,518 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1552080072] [2023-11-29 05:21:01,518 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1552080072] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:21:01,518 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [704343256] [2023-11-29 05:21:01,518 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-29 05:21:01,519 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:21:01,519 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91c24fb8-60ba-4595-8b29-b825520c5f1b/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:21:01,520 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91c24fb8-60ba-4595-8b29-b825520c5f1b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:21:01,522 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91c24fb8-60ba-4595-8b29-b825520c5f1b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-11-29 05:21:01,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:21:01,593 INFO L262 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-29 05:21:01,595 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:21:01,633 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:21:01,633 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:21:01,896 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:21:01,896 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [704343256] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:21:01,896 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 05:21:01,896 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 6] total 8 [2023-11-29 05:21:01,896 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1029178344] [2023-11-29 05:21:01,896 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 05:21:01,897 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-29 05:21:01,897 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:21:01,897 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-29 05:21:01,897 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2023-11-29 05:21:01,897 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 22 [2023-11-29 05:21:01,898 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 374 places, 1187 transitions, 28057 flow. Second operand has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:21:01,898 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:21:01,898 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 22 [2023-11-29 05:21:01,900 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:21:06,889 INFO L124 PetriNetUnfolderBase]: 5498/9937 cut-off events. [2023-11-29 05:21:06,889 INFO L125 PetriNetUnfolderBase]: For 417753/418046 co-relation queries the response was YES. [2023-11-29 05:21:07,019 INFO L83 FinitePrefix]: Finished finitePrefix Result has 107905 conditions, 9937 events. 5498/9937 cut-off events. For 417753/418046 co-relation queries the response was YES. Maximal size of possible extension queue 487. Compared 73527 event pairs, 285 based on Foata normal form. 9/9766 useless extension candidates. Maximal degree in co-relation 107362. Up to 3423 conditions per place. [2023-11-29 05:21:07,138 INFO L140 encePairwiseOnDemand]: 18/22 looper letters, 1031 selfloop transitions, 340 changer transitions 143/1836 dead transitions. [2023-11-29 05:21:07,138 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 375 places, 1836 transitions, 46134 flow [2023-11-29 05:21:07,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-29 05:21:07,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-29 05:21:07,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 80 transitions. [2023-11-29 05:21:07,140 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7272727272727273 [2023-11-29 05:21:07,140 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 80 transitions. [2023-11-29 05:21:07,140 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 80 transitions. [2023-11-29 05:21:07,140 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:21:07,140 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 80 transitions. [2023-11-29 05:21:07,141 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 16.0) internal successors, (80), 5 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:21:07,141 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 22.0) internal successors, (132), 6 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:21:07,141 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 22.0) internal successors, (132), 6 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:21:07,141 INFO L175 Difference]: Start difference. First operand has 374 places, 1187 transitions, 28057 flow. Second operand 5 states and 80 transitions. [2023-11-29 05:21:07,142 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 375 places, 1836 transitions, 46134 flow [2023-11-29 05:21:15,880 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 364 places, 1836 transitions, 45796 flow, removed 107 selfloop flow, removed 11 redundant places. [2023-11-29 05:21:15,926 INFO L231 Difference]: Finished difference. Result has 367 places, 1374 transitions, 34872 flow [2023-11-29 05:21:15,927 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=27884, PETRI_DIFFERENCE_MINUEND_PLACES=360, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1187, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=135, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=847, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=34872, PETRI_PLACES=367, PETRI_TRANSITIONS=1374} [2023-11-29 05:21:15,927 INFO L281 CegarLoopForPetriNet]: 24 programPoint places, 343 predicate places. [2023-11-29 05:21:15,927 INFO L495 AbstractCegarLoop]: Abstraction has has 367 places, 1374 transitions, 34872 flow [2023-11-29 05:21:15,928 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:21:15,928 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:21:15,928 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:21:15,933 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91c24fb8-60ba-4595-8b29-b825520c5f1b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2023-11-29 05:21:16,128 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91c24fb8-60ba-4595-8b29-b825520c5f1b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:21:16,129 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 05:21:16,129 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:21:16,129 INFO L85 PathProgramCache]: Analyzing trace with hash -846849285, now seen corresponding path program 14 times [2023-11-29 05:21:16,129 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:21:16,129 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [485620288] [2023-11-29 05:21:16,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:21:16,129 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:21:16,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:21:16,308 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:21:16,308 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:21:16,308 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [485620288] [2023-11-29 05:21:16,308 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [485620288] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:21:16,309 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [103303305] [2023-11-29 05:21:16,309 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 05:21:16,309 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:21:16,309 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91c24fb8-60ba-4595-8b29-b825520c5f1b/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:21:16,311 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91c24fb8-60ba-4595-8b29-b825520c5f1b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:21:16,313 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91c24fb8-60ba-4595-8b29-b825520c5f1b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-11-29 05:21:16,401 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 05:21:16,402 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 05:21:16,403 INFO L262 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 11 conjunts are in the unsatisfiable core [2023-11-29 05:21:16,404 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:21:16,523 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:21:16,523 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:21:17,006 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:21:17,006 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [103303305] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:21:17,006 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 05:21:17,006 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 21 [2023-11-29 05:21:17,007 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [177714689] [2023-11-29 05:21:17,007 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 05:21:17,007 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-11-29 05:21:17,008 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:21:17,008 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-11-29 05:21:17,009 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=369, Unknown=0, NotChecked=0, Total=462 [2023-11-29 05:21:17,013 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2023-11-29 05:21:17,013 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 367 places, 1374 transitions, 34872 flow. Second operand has 22 states, 22 states have (on average 5.2727272727272725) internal successors, (116), 22 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:21:17,013 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:21:17,013 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2023-11-29 05:21:17,014 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:21:26,093 INFO L124 PetriNetUnfolderBase]: 7556/12596 cut-off events. [2023-11-29 05:21:26,094 INFO L125 PetriNetUnfolderBase]: For 577277/577277 co-relation queries the response was YES. [2023-11-29 05:21:26,317 INFO L83 FinitePrefix]: Finished finitePrefix Result has 141501 conditions, 12596 events. 7556/12596 cut-off events. For 577277/577277 co-relation queries the response was YES. Maximal size of possible extension queue 531. Compared 85601 event pairs, 28 based on Foata normal form. 154/12750 useless extension candidates. Maximal degree in co-relation 140804. Up to 2514 conditions per place. [2023-11-29 05:21:26,411 INFO L140 encePairwiseOnDemand]: 12/22 looper letters, 354 selfloop transitions, 1898 changer transitions 87/2340 dead transitions. [2023-11-29 05:21:26,411 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 412 places, 2340 transitions, 61911 flow [2023-11-29 05:21:26,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2023-11-29 05:21:26,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2023-11-29 05:21:26,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 400 transitions. [2023-11-29 05:21:26,413 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3952569169960474 [2023-11-29 05:21:26,413 INFO L72 ComplementDD]: Start complementDD. Operand 46 states and 400 transitions. [2023-11-29 05:21:26,413 INFO L73 IsDeterministic]: Start isDeterministic. Operand 46 states and 400 transitions. [2023-11-29 05:21:26,413 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:21:26,413 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 46 states and 400 transitions. [2023-11-29 05:21:26,414 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 47 states, 46 states have (on average 8.695652173913043) internal successors, (400), 46 states have internal predecessors, (400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:21:26,415 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 47 states, 47 states have (on average 22.0) internal successors, (1034), 47 states have internal predecessors, (1034), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:21:26,416 INFO L81 ComplementDD]: Finished complementDD. Result has 47 states, 47 states have (on average 22.0) internal successors, (1034), 47 states have internal predecessors, (1034), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:21:26,416 INFO L175 Difference]: Start difference. First operand has 367 places, 1374 transitions, 34872 flow. Second operand 46 states and 400 transitions. [2023-11-29 05:21:26,416 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 412 places, 2340 transitions, 61911 flow [2023-11-29 05:21:36,533 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 411 places, 2340 transitions, 61802 flow, removed 46 selfloop flow, removed 1 redundant places. [2023-11-29 05:21:36,601 INFO L231 Difference]: Finished difference. Result has 441 places, 2071 transitions, 60126 flow [2023-11-29 05:21:36,602 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=34798, PETRI_DIFFERENCE_MINUEND_PLACES=366, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1374, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1240, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=87, PETRI_DIFFERENCE_SUBTRAHEND_STATES=46, PETRI_FLOW=60126, PETRI_PLACES=441, PETRI_TRANSITIONS=2071} [2023-11-29 05:21:36,602 INFO L281 CegarLoopForPetriNet]: 24 programPoint places, 417 predicate places. [2023-11-29 05:21:36,602 INFO L495 AbstractCegarLoop]: Abstraction has has 441 places, 2071 transitions, 60126 flow [2023-11-29 05:21:36,603 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 5.2727272727272725) internal successors, (116), 22 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:21:36,603 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:21:36,603 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:21:36,607 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91c24fb8-60ba-4595-8b29-b825520c5f1b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-11-29 05:21:36,803 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91c24fb8-60ba-4595-8b29-b825520c5f1b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:21:36,803 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 05:21:36,803 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:21:36,804 INFO L85 PathProgramCache]: Analyzing trace with hash 191008199, now seen corresponding path program 15 times [2023-11-29 05:21:36,804 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:21:36,804 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1453805018] [2023-11-29 05:21:36,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:21:36,804 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:21:36,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:21:37,033 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:21:37,033 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:21:37,033 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1453805018] [2023-11-29 05:21:37,033 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1453805018] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:21:37,033 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1147173576] [2023-11-29 05:21:37,033 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-29 05:21:37,034 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:21:37,034 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91c24fb8-60ba-4595-8b29-b825520c5f1b/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:21:37,035 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91c24fb8-60ba-4595-8b29-b825520c5f1b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:21:37,038 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91c24fb8-60ba-4595-8b29-b825520c5f1b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-11-29 05:21:37,124 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-11-29 05:21:37,124 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 05:21:37,125 INFO L262 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-29 05:21:37,127 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:21:37,348 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:21:37,348 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:21:37,549 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 12 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:21:37,549 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1147173576] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:21:37,549 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 05:21:37,549 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9, 10] total 27 [2023-11-29 05:21:37,550 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [9892682] [2023-11-29 05:21:37,550 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 05:21:37,550 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-11-29 05:21:37,550 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:21:37,551 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-11-29 05:21:37,551 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=560, Unknown=0, NotChecked=0, Total=702 [2023-11-29 05:21:37,555 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2023-11-29 05:21:37,555 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 441 places, 2071 transitions, 60126 flow. Second operand has 27 states, 27 states have (on average 5.592592592592593) internal successors, (151), 27 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:21:37,555 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:21:37,556 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2023-11-29 05:21:37,556 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:21:59,131 INFO L124 PetriNetUnfolderBase]: 11742/19654 cut-off events. [2023-11-29 05:21:59,131 INFO L125 PetriNetUnfolderBase]: For 1095664/1095664 co-relation queries the response was YES. [2023-11-29 05:21:59,441 INFO L83 FinitePrefix]: Finished finitePrefix Result has 252877 conditions, 19654 events. 11742/19654 cut-off events. For 1095664/1095664 co-relation queries the response was YES. Maximal size of possible extension queue 770. Compared 142561 event pairs, 10 based on Foata normal form. 110/19764 useless extension candidates. Maximal degree in co-relation 252273. Up to 3810 conditions per place. [2023-11-29 05:21:59,603 INFO L140 encePairwiseOnDemand]: 12/22 looper letters, 1280 selfloop transitions, 3053 changer transitions 135/4469 dead transitions. [2023-11-29 05:21:59,603 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 504 places, 4469 transitions, 134469 flow [2023-11-29 05:21:59,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2023-11-29 05:21:59,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2023-11-29 05:21:59,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 563 transitions. [2023-11-29 05:21:59,606 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3819538670284939 [2023-11-29 05:21:59,606 INFO L72 ComplementDD]: Start complementDD. Operand 67 states and 563 transitions. [2023-11-29 05:21:59,606 INFO L73 IsDeterministic]: Start isDeterministic. Operand 67 states and 563 transitions. [2023-11-29 05:21:59,607 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:21:59,607 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 67 states and 563 transitions. [2023-11-29 05:21:59,609 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 68 states, 67 states have (on average 8.402985074626866) internal successors, (563), 67 states have internal predecessors, (563), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:21:59,613 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 68 states, 68 states have (on average 22.0) internal successors, (1496), 68 states have internal predecessors, (1496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:21:59,613 INFO L81 ComplementDD]: Finished complementDD. Result has 68 states, 68 states have (on average 22.0) internal successors, (1496), 68 states have internal predecessors, (1496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:21:59,614 INFO L175 Difference]: Start difference. First operand has 441 places, 2071 transitions, 60126 flow. Second operand 67 states and 563 transitions. [2023-11-29 05:21:59,614 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 504 places, 4469 transitions, 134469 flow [2023-11-29 05:22:29,122 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 486 places, 4469 transitions, 129964 flow, removed 1948 selfloop flow, removed 18 redundant places. [2023-11-29 05:22:29,286 INFO L231 Difference]: Finished difference. Result has 511 places, 3720 transitions, 118262 flow [2023-11-29 05:22:29,288 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=58204, PETRI_DIFFERENCE_MINUEND_PLACES=420, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2071, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1588, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=341, PETRI_DIFFERENCE_SUBTRAHEND_STATES=67, PETRI_FLOW=118262, PETRI_PLACES=511, PETRI_TRANSITIONS=3720} [2023-11-29 05:22:29,289 INFO L281 CegarLoopForPetriNet]: 24 programPoint places, 487 predicate places. [2023-11-29 05:22:29,289 INFO L495 AbstractCegarLoop]: Abstraction has has 511 places, 3720 transitions, 118262 flow [2023-11-29 05:22:29,289 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 5.592592592592593) internal successors, (151), 27 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:22:29,289 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:22:29,289 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:22:29,294 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91c24fb8-60ba-4595-8b29-b825520c5f1b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2023-11-29 05:22:29,490 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91c24fb8-60ba-4595-8b29-b825520c5f1b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-11-29 05:22:29,490 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 05:22:29,490 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:22:29,490 INFO L85 PathProgramCache]: Analyzing trace with hash 1741178213, now seen corresponding path program 16 times [2023-11-29 05:22:29,491 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:22:29,491 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1172938979] [2023-11-29 05:22:29,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:22:29,491 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:22:29,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:22:29,691 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:22:29,691 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:22:29,691 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1172938979] [2023-11-29 05:22:29,691 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1172938979] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:22:29,691 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [141289836] [2023-11-29 05:22:29,691 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-29 05:22:29,691 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:22:29,691 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91c24fb8-60ba-4595-8b29-b825520c5f1b/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:22:29,692 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91c24fb8-60ba-4595-8b29-b825520c5f1b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:22:29,695 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91c24fb8-60ba-4595-8b29-b825520c5f1b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-11-29 05:22:29,765 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-29 05:22:29,765 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 05:22:29,766 INFO L262 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-29 05:22:29,768 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:22:29,920 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:22:29,920 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:22:30,109 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:22:30,109 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [141289836] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:22:30,109 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 05:22:30,109 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9, 10] total 24 [2023-11-29 05:22:30,109 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1615644096] [2023-11-29 05:22:30,110 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 05:22:30,110 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-11-29 05:22:30,110 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:22:30,111 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-11-29 05:22:30,111 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=449, Unknown=0, NotChecked=0, Total=552 [2023-11-29 05:22:30,126 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2023-11-29 05:22:30,126 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 511 places, 3720 transitions, 118262 flow. Second operand has 24 states, 24 states have (on average 5.458333333333333) internal successors, (131), 24 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:22:30,126 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:22:30,127 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2023-11-29 05:22:30,127 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:23:11,349 INFO L124 PetriNetUnfolderBase]: 14960/24821 cut-off events. [2023-11-29 05:23:11,349 INFO L125 PetriNetUnfolderBase]: For 1266634/1266634 co-relation queries the response was YES. [2023-11-29 05:23:11,829 INFO L83 FinitePrefix]: Finished finitePrefix Result has 326610 conditions, 24821 events. 14960/24821 cut-off events. For 1266634/1266634 co-relation queries the response was YES. Maximal size of possible extension queue 856. Compared 182302 event pairs, 27 based on Foata normal form. 282/25103 useless extension candidates. Maximal degree in co-relation 326050. Up to 4958 conditions per place. [2023-11-29 05:23:12,042 INFO L140 encePairwiseOnDemand]: 12/22 looper letters, 1618 selfloop transitions, 3913 changer transitions 15/5547 dead transitions. [2023-11-29 05:23:12,042 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 558 places, 5547 transitions, 182981 flow [2023-11-29 05:23:12,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2023-11-29 05:23:12,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2023-11-29 05:23:12,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 449 transitions. [2023-11-29 05:23:12,044 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4001782531194296 [2023-11-29 05:23:12,044 INFO L72 ComplementDD]: Start complementDD. Operand 51 states and 449 transitions. [2023-11-29 05:23:12,044 INFO L73 IsDeterministic]: Start isDeterministic. Operand 51 states and 449 transitions. [2023-11-29 05:23:12,044 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:23:12,045 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 51 states and 449 transitions. [2023-11-29 05:23:12,046 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 52 states, 51 states have (on average 8.803921568627452) internal successors, (449), 51 states have internal predecessors, (449), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:23:12,047 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 52 states, 52 states have (on average 22.0) internal successors, (1144), 52 states have internal predecessors, (1144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:23:12,048 INFO L81 ComplementDD]: Finished complementDD. Result has 52 states, 52 states have (on average 22.0) internal successors, (1144), 52 states have internal predecessors, (1144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:23:12,048 INFO L175 Difference]: Start difference. First operand has 511 places, 3720 transitions, 118262 flow. Second operand 51 states and 449 transitions. [2023-11-29 05:23:12,048 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 558 places, 5547 transitions, 182981 flow [2023-11-29 05:24:10,773 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 542 places, 5547 transitions, 179343 flow, removed 1268 selfloop flow, removed 16 redundant places. [2023-11-29 05:24:10,979 INFO L231 Difference]: Finished difference. Result has 552 places, 4853 transitions, 165518 flow [2023-11-29 05:24:10,983 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=115795, PETRI_DIFFERENCE_MINUEND_PLACES=492, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=3720, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2807, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=655, PETRI_DIFFERENCE_SUBTRAHEND_STATES=51, PETRI_FLOW=165518, PETRI_PLACES=552, PETRI_TRANSITIONS=4853} [2023-11-29 05:24:10,983 INFO L281 CegarLoopForPetriNet]: 24 programPoint places, 528 predicate places. [2023-11-29 05:24:10,983 INFO L495 AbstractCegarLoop]: Abstraction has has 552 places, 4853 transitions, 165518 flow [2023-11-29 05:24:10,984 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 5.458333333333333) internal successors, (131), 24 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:24:10,984 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:24:10,984 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:24:10,989 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91c24fb8-60ba-4595-8b29-b825520c5f1b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2023-11-29 05:24:11,184 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91c24fb8-60ba-4595-8b29-b825520c5f1b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-11-29 05:24:11,185 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 05:24:11,185 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:24:11,185 INFO L85 PathProgramCache]: Analyzing trace with hash -1088095285, now seen corresponding path program 17 times [2023-11-29 05:24:11,185 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:24:11,185 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [594098353] [2023-11-29 05:24:11,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:24:11,185 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:24:11,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:24:11,390 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:24:11,390 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:24:11,390 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [594098353] [2023-11-29 05:24:11,391 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [594098353] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:24:11,391 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [53556789] [2023-11-29 05:24:11,391 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-29 05:24:11,391 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:24:11,391 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91c24fb8-60ba-4595-8b29-b825520c5f1b/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:24:11,392 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91c24fb8-60ba-4595-8b29-b825520c5f1b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:24:11,397 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91c24fb8-60ba-4595-8b29-b825520c5f1b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-11-29 05:24:11,488 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-11-29 05:24:11,488 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 05:24:11,490 INFO L262 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 11 conjunts are in the unsatisfiable core [2023-11-29 05:24:11,491 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:24:11,650 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:24:11,650 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:24:11,936 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:24:11,936 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [53556789] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:24:11,936 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 05:24:11,936 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 25 [2023-11-29 05:24:11,936 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [748685048] [2023-11-29 05:24:11,936 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 05:24:11,937 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-11-29 05:24:11,937 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:24:11,937 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-11-29 05:24:11,937 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=454, Unknown=0, NotChecked=0, Total=600 [2023-11-29 05:24:11,947 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2023-11-29 05:24:11,947 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 552 places, 4853 transitions, 165518 flow. Second operand has 25 states, 25 states have (on average 5.56) internal successors, (139), 25 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:24:11,947 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:24:11,948 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2023-11-29 05:24:11,948 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:25:24,856 INFO L124 PetriNetUnfolderBase]: 19329/32154 cut-off events. [2023-11-29 05:25:24,856 INFO L125 PetriNetUnfolderBase]: For 1716440/1716440 co-relation queries the response was YES. [2023-11-29 05:25:25,452 INFO L83 FinitePrefix]: Finished finitePrefix Result has 436244 conditions, 32154 events. 19329/32154 cut-off events. For 1716440/1716440 co-relation queries the response was YES. Maximal size of possible extension queue 1045. Compared 244706 event pairs, 61 based on Foata normal form. 316/32470 useless extension candidates. Maximal degree in co-relation 435525. Up to 6342 conditions per place. [2023-11-29 05:25:25,695 INFO L140 encePairwiseOnDemand]: 12/22 looper letters, 1770 selfloop transitions, 5112 changer transitions 12/6895 dead transitions. [2023-11-29 05:25:25,695 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 626 places, 6895 transitions, 242153 flow [2023-11-29 05:25:25,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2023-11-29 05:25:25,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2023-11-29 05:25:25,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 637 transitions. [2023-11-29 05:25:25,698 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38606060606060605 [2023-11-29 05:25:25,698 INFO L72 ComplementDD]: Start complementDD. Operand 75 states and 637 transitions. [2023-11-29 05:25:25,698 INFO L73 IsDeterministic]: Start isDeterministic. Operand 75 states and 637 transitions. [2023-11-29 05:25:25,698 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:25:25,698 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 75 states and 637 transitions. [2023-11-29 05:25:25,700 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 76 states, 75 states have (on average 8.493333333333334) internal successors, (637), 75 states have internal predecessors, (637), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:25:25,702 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 76 states, 76 states have (on average 22.0) internal successors, (1672), 76 states have internal predecessors, (1672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:25:25,703 INFO L81 ComplementDD]: Finished complementDD. Result has 76 states, 76 states have (on average 22.0) internal successors, (1672), 76 states have internal predecessors, (1672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:25:25,703 INFO L175 Difference]: Start difference. First operand has 552 places, 4853 transitions, 165518 flow. Second operand 75 states and 637 transitions. [2023-11-29 05:25:25,703 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 626 places, 6895 transitions, 242153 flow [2023-11-29 05:27:10,413 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 615 places, 6895 transitions, 241524 flow, removed 103 selfloop flow, removed 11 redundant places. [2023-11-29 05:27:10,687 INFO L231 Difference]: Finished difference. Result has 654 places, 6357 transitions, 233986 flow [2023-11-29 05:27:10,691 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=165052, PETRI_DIFFERENCE_MINUEND_PLACES=541, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=4853, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3680, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=967, PETRI_DIFFERENCE_SUBTRAHEND_STATES=75, PETRI_FLOW=233986, PETRI_PLACES=654, PETRI_TRANSITIONS=6357} [2023-11-29 05:27:10,691 INFO L281 CegarLoopForPetriNet]: 24 programPoint places, 630 predicate places. [2023-11-29 05:27:10,691 INFO L495 AbstractCegarLoop]: Abstraction has has 654 places, 6357 transitions, 233986 flow [2023-11-29 05:27:10,692 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 5.56) internal successors, (139), 25 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:27:10,692 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:27:10,692 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:27:10,697 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91c24fb8-60ba-4595-8b29-b825520c5f1b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2023-11-29 05:27:10,892 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91c24fb8-60ba-4595-8b29-b825520c5f1b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:27:10,893 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 05:27:10,893 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:27:10,893 INFO L85 PathProgramCache]: Analyzing trace with hash 1078593673, now seen corresponding path program 18 times [2023-11-29 05:27:10,893 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:27:10,893 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [756611916] [2023-11-29 05:27:10,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:27:10,893 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:27:10,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:27:11,087 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:27:11,087 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:27:11,087 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [756611916] [2023-11-29 05:27:11,087 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [756611916] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:27:11,087 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [332650352] [2023-11-29 05:27:11,087 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-29 05:27:11,088 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:27:11,088 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91c24fb8-60ba-4595-8b29-b825520c5f1b/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:27:11,089 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91c24fb8-60ba-4595-8b29-b825520c5f1b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:27:11,091 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91c24fb8-60ba-4595-8b29-b825520c5f1b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-11-29 05:27:11,168 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2023-11-29 05:27:11,168 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 05:27:11,169 INFO L262 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 11 conjunts are in the unsatisfiable core [2023-11-29 05:27:11,170 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:27:11,277 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:27:11,277 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:27:11,565 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 9 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:27:11,565 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [332650352] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:27:11,566 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 05:27:11,566 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 25 [2023-11-29 05:27:11,566 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [54944435] [2023-11-29 05:27:11,566 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 05:27:11,566 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-11-29 05:27:11,567 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:27:11,567 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-11-29 05:27:11,568 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=450, Unknown=0, NotChecked=0, Total=600 [2023-11-29 05:27:11,595 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2023-11-29 05:27:11,595 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 654 places, 6357 transitions, 233986 flow. Second operand has 25 states, 25 states have (on average 5.36) internal successors, (134), 25 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:27:11,596 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:27:11,596 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2023-11-29 05:27:11,596 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:28:45,669 INFO L124 PetriNetUnfolderBase]: 18921/31212 cut-off events. [2023-11-29 05:28:45,670 INFO L125 PetriNetUnfolderBase]: For 2061383/2061383 co-relation queries the response was YES. [2023-11-29 05:28:46,510 INFO L83 FinitePrefix]: Finished finitePrefix Result has 467456 conditions, 31212 events. 18921/31212 cut-off events. For 2061383/2061383 co-relation queries the response was YES. Maximal size of possible extension queue 1003. Compared 234136 event pairs, 190 based on Foata normal form. 174/31386 useless extension candidates. Maximal degree in co-relation 466675. Up to 6338 conditions per place. [2023-11-29 05:28:46,809 INFO L140 encePairwiseOnDemand]: 13/22 looper letters, 2779 selfloop transitions, 3970 changer transitions 7/6757 dead transitions. [2023-11-29 05:28:46,809 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 697 places, 6757 transitions, 258584 flow [2023-11-29 05:28:46,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2023-11-29 05:28:46,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2023-11-29 05:28:46,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 384 transitions. [2023-11-29 05:28:46,811 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39669421487603307 [2023-11-29 05:28:46,811 INFO L72 ComplementDD]: Start complementDD. Operand 44 states and 384 transitions. [2023-11-29 05:28:46,811 INFO L73 IsDeterministic]: Start isDeterministic. Operand 44 states and 384 transitions. [2023-11-29 05:28:46,811 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:28:46,812 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 44 states and 384 transitions. [2023-11-29 05:28:46,812 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 45 states, 44 states have (on average 8.727272727272727) internal successors, (384), 44 states have internal predecessors, (384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:28:46,814 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 45 states, 45 states have (on average 22.0) internal successors, (990), 45 states have internal predecessors, (990), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:28:46,814 INFO L81 ComplementDD]: Finished complementDD. Result has 45 states, 45 states have (on average 22.0) internal successors, (990), 45 states have internal predecessors, (990), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:28:46,815 INFO L175 Difference]: Start difference. First operand has 654 places, 6357 transitions, 233986 flow. Second operand 44 states and 384 transitions. [2023-11-29 05:28:46,815 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 697 places, 6757 transitions, 258584 flow [2023-11-29 05:31:38,154 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 681 places, 6757 transitions, 255805 flow, removed 699 selfloop flow, removed 16 redundant places. [2023-11-29 05:31:38,472 INFO L231 Difference]: Finished difference. Result has 693 places, 6374 transitions, 242929 flow [2023-11-29 05:31:38,477 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=228955, PETRI_DIFFERENCE_MINUEND_PLACES=638, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=6286, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3896, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=2374, PETRI_DIFFERENCE_SUBTRAHEND_STATES=44, PETRI_FLOW=242929, PETRI_PLACES=693, PETRI_TRANSITIONS=6374} [2023-11-29 05:31:38,478 INFO L281 CegarLoopForPetriNet]: 24 programPoint places, 669 predicate places. [2023-11-29 05:31:38,478 INFO L495 AbstractCegarLoop]: Abstraction has has 693 places, 6374 transitions, 242929 flow [2023-11-29 05:31:38,478 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 5.36) internal successors, (134), 25 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:31:38,478 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:31:38,479 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:31:38,484 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91c24fb8-60ba-4595-8b29-b825520c5f1b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2023-11-29 05:31:38,679 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91c24fb8-60ba-4595-8b29-b825520c5f1b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:31:38,679 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 05:31:38,679 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:31:38,679 INFO L85 PathProgramCache]: Analyzing trace with hash -2033068663, now seen corresponding path program 19 times [2023-11-29 05:31:38,679 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:31:38,680 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [359071240] [2023-11-29 05:31:38,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:31:38,680 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:31:38,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:31:38,869 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:31:38,870 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:31:38,870 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [359071240] [2023-11-29 05:31:38,870 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [359071240] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:31:38,870 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1996948299] [2023-11-29 05:31:38,870 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-29 05:31:38,870 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:31:38,870 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91c24fb8-60ba-4595-8b29-b825520c5f1b/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:31:38,871 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91c24fb8-60ba-4595-8b29-b825520c5f1b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:31:38,876 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91c24fb8-60ba-4595-8b29-b825520c5f1b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-11-29 05:31:38,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:31:38,956 INFO L262 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-29 05:31:38,957 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:31:39,117 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:31:39,117 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:31:39,386 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:31:39,386 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1996948299] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:31:39,386 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 05:31:39,386 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 11] total 29 [2023-11-29 05:31:39,387 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [446465497] [2023-11-29 05:31:39,387 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 05:31:39,387 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-11-29 05:31:39,388 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:31:39,388 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-11-29 05:31:39,388 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=167, Invalid=645, Unknown=0, NotChecked=0, Total=812 [2023-11-29 05:31:39,399 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2023-11-29 05:31:39,399 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 693 places, 6374 transitions, 242929 flow. Second operand has 29 states, 29 states have (on average 5.413793103448276) internal successors, (157), 29 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:31:39,399 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:31:39,399 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2023-11-29 05:31:39,399 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:33:51,504 INFO L124 PetriNetUnfolderBase]: 22869/37548 cut-off events. [2023-11-29 05:33:51,504 INFO L125 PetriNetUnfolderBase]: For 2567318/2567318 co-relation queries the response was YES. [2023-11-29 05:33:52,528 INFO L83 FinitePrefix]: Finished finitePrefix Result has 580983 conditions, 37548 events. 22869/37548 cut-off events. For 2567318/2567318 co-relation queries the response was YES. Maximal size of possible extension queue 1137. Compared 284552 event pairs, 107 based on Foata normal form. 404/37952 useless extension candidates. Maximal degree in co-relation 580193. Up to 7696 conditions per place. [2023-11-29 05:33:52,894 INFO L140 encePairwiseOnDemand]: 12/22 looper letters, 2173 selfloop transitions, 6241 changer transitions 56/8471 dead transitions. [2023-11-29 05:33:52,894 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 772 places, 8471 transitions, 336689 flow [2023-11-29 05:33:52,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2023-11-29 05:33:52,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2023-11-29 05:33:52,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 680 transitions. [2023-11-29 05:33:52,897 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38159371492704824 [2023-11-29 05:33:52,897 INFO L72 ComplementDD]: Start complementDD. Operand 81 states and 680 transitions. [2023-11-29 05:33:52,897 INFO L73 IsDeterministic]: Start isDeterministic. Operand 81 states and 680 transitions. [2023-11-29 05:33:52,897 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:33:52,897 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 81 states and 680 transitions. [2023-11-29 05:33:52,899 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 82 states, 81 states have (on average 8.395061728395062) internal successors, (680), 81 states have internal predecessors, (680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:33:52,901 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 82 states, 82 states have (on average 22.0) internal successors, (1804), 82 states have internal predecessors, (1804), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:33:52,902 INFO L81 ComplementDD]: Finished complementDD. Result has 82 states, 82 states have (on average 22.0) internal successors, (1804), 82 states have internal predecessors, (1804), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:33:52,902 INFO L175 Difference]: Start difference. First operand has 693 places, 6374 transitions, 242929 flow. Second operand 81 states and 680 transitions. [2023-11-29 05:33:52,902 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 772 places, 8471 transitions, 336689 flow