./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/weaver/popl20-more-queue-add-2-nl.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_5de6e5a5-dca5-4d1c-8175-3ad29fb43980/bin/uautomizer-verify-BQ2R08f2Ya/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5de6e5a5-dca5-4d1c-8175-3ad29fb43980/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_5de6e5a5-dca5-4d1c-8175-3ad29fb43980/bin/uautomizer-verify-BQ2R08f2Ya/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5de6e5a5-dca5-4d1c-8175-3ad29fb43980/bin/uautomizer-verify-BQ2R08f2Ya/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/popl20-more-queue-add-2-nl.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5de6e5a5-dca5-4d1c-8175-3ad29fb43980/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_5de6e5a5-dca5-4d1c-8175-3ad29fb43980/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 613bf9314e4e3fb6e64527ec38c7e6b39400e524de37a5103e9f06d9db406d3d --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-29 00:41:44,552 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-29 00:41:44,641 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5de6e5a5-dca5-4d1c-8175-3ad29fb43980/bin/uautomizer-verify-BQ2R08f2Ya/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-29 00:41:44,646 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-29 00:41:44,647 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-29 00:41:44,669 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-29 00:41:44,670 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-29 00:41:44,670 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-29 00:41:44,671 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-29 00:41:44,671 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-29 00:41:44,672 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-29 00:41:44,673 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-29 00:41:44,673 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-29 00:41:44,674 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-29 00:41:44,674 INFO L153 SettingsManager]: * Use SBE=true [2023-11-29 00:41:44,675 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-29 00:41:44,675 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-29 00:41:44,676 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-29 00:41:44,676 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-29 00:41:44,677 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-29 00:41:44,677 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-29 00:41:44,678 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-29 00:41:44,678 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-29 00:41:44,679 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-29 00:41:44,679 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-29 00:41:44,679 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-29 00:41:44,680 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-29 00:41:44,680 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-29 00:41:44,681 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-29 00:41:44,681 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-29 00:41:44,681 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-29 00:41:44,682 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-29 00:41:44,682 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-29 00:41:44,682 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-29 00:41:44,682 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-29 00:41:44,683 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-29 00:41:44,683 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-29 00:41:44,683 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-29 00:41:44,683 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-29 00:41:44,683 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-29 00:41:44,684 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-29 00:41:44,684 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-29 00:41:44,684 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_5de6e5a5-dca5-4d1c-8175-3ad29fb43980/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5de6e5a5-dca5-4d1c-8175-3ad29fb43980/bin/uautomizer-verify-BQ2R08f2Ya Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 613bf9314e4e3fb6e64527ec38c7e6b39400e524de37a5103e9f06d9db406d3d [2023-11-29 00:41:44,947 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-29 00:41:44,973 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-29 00:41:44,984 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-29 00:41:44,985 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-29 00:41:44,997 INFO L274 PluginConnector]: CDTParser initialized [2023-11-29 00:41:44,998 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5de6e5a5-dca5-4d1c-8175-3ad29fb43980/bin/uautomizer-verify-BQ2R08f2Ya/../../sv-benchmarks/c/weaver/popl20-more-queue-add-2-nl.wvr.c [2023-11-29 00:41:47,776 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-29 00:41:47,998 INFO L384 CDTParser]: Found 1 translation units. [2023-11-29 00:41:47,999 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5de6e5a5-dca5-4d1c-8175-3ad29fb43980/sv-benchmarks/c/weaver/popl20-more-queue-add-2-nl.wvr.c [2023-11-29 00:41:48,008 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5de6e5a5-dca5-4d1c-8175-3ad29fb43980/bin/uautomizer-verify-BQ2R08f2Ya/data/0a86199d6/d48a7a25f21c4fc8b84581ba79133157/FLAGf312974f1 [2023-11-29 00:41:48,028 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5de6e5a5-dca5-4d1c-8175-3ad29fb43980/bin/uautomizer-verify-BQ2R08f2Ya/data/0a86199d6/d48a7a25f21c4fc8b84581ba79133157 [2023-11-29 00:41:48,032 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-29 00:41:48,033 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-29 00:41:48,035 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-29 00:41:48,035 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-29 00:41:48,042 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-29 00:41:48,043 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 12:41:48" (1/1) ... [2023-11-29 00:41:48,044 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@363636a7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:41:48, skipping insertion in model container [2023-11-29 00:41:48,044 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 12:41:48" (1/1) ... [2023-11-29 00:41:48,076 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-29 00:41:48,271 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_5de6e5a5-dca5-4d1c-8175-3ad29fb43980/sv-benchmarks/c/weaver/popl20-more-queue-add-2-nl.wvr.c[2896,2909] [2023-11-29 00:41:48,281 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-29 00:41:48,294 INFO L202 MainTranslator]: Completed pre-run [2023-11-29 00:41:48,322 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_5de6e5a5-dca5-4d1c-8175-3ad29fb43980/sv-benchmarks/c/weaver/popl20-more-queue-add-2-nl.wvr.c[2896,2909] [2023-11-29 00:41:48,326 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-29 00:41:48,334 WARN L675 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-11-29 00:41:48,334 WARN L675 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-11-29 00:41:48,342 INFO L206 MainTranslator]: Completed translation [2023-11-29 00:41:48,342 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:41:48 WrapperNode [2023-11-29 00:41:48,342 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-29 00:41:48,343 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-29 00:41:48,343 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-29 00:41:48,344 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-29 00:41:48,350 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:41:48" (1/1) ... [2023-11-29 00:41:48,359 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:41:48" (1/1) ... [2023-11-29 00:41:48,385 INFO L138 Inliner]: procedures = 25, calls = 39, calls flagged for inlining = 12, calls inlined = 12, statements flattened = 171 [2023-11-29 00:41:48,385 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-29 00:41:48,386 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-29 00:41:48,386 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-29 00:41:48,386 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-29 00:41:48,397 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:41:48" (1/1) ... [2023-11-29 00:41:48,397 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:41:48" (1/1) ... [2023-11-29 00:41:48,401 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:41:48" (1/1) ... [2023-11-29 00:41:48,418 INFO L175 MemorySlicer]: Split 10 memory accesses to 4 slices as follows [2, 2, 4, 2]. 40 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0, 0, 0]. The 3 writes are split as follows [0, 1, 1, 1]. [2023-11-29 00:41:48,419 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:41:48" (1/1) ... [2023-11-29 00:41:48,419 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:41:48" (1/1) ... [2023-11-29 00:41:48,430 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:41:48" (1/1) ... [2023-11-29 00:41:48,435 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:41:48" (1/1) ... [2023-11-29 00:41:48,438 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:41:48" (1/1) ... [2023-11-29 00:41:48,440 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:41:48" (1/1) ... [2023-11-29 00:41:48,445 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-29 00:41:48,446 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-29 00:41:48,446 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-29 00:41:48,446 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-29 00:41:48,447 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:41:48" (1/1) ... [2023-11-29 00:41:48,454 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-29 00:41:48,468 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5de6e5a5-dca5-4d1c-8175-3ad29fb43980/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:41:48,489 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5de6e5a5-dca5-4d1c-8175-3ad29fb43980/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-29 00:41:48,513 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5de6e5a5-dca5-4d1c-8175-3ad29fb43980/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-29 00:41:48,532 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-29 00:41:48,532 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-29 00:41:48,532 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2023-11-29 00:41:48,533 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2023-11-29 00:41:48,533 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2023-11-29 00:41:48,533 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2023-11-29 00:41:48,533 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2023-11-29 00:41:48,534 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2023-11-29 00:41:48,534 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2023-11-29 00:41:48,534 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2023-11-29 00:41:48,534 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-11-29 00:41:48,534 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-11-29 00:41:48,535 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-11-29 00:41:48,535 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-11-29 00:41:48,535 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-29 00:41:48,535 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2023-11-29 00:41:48,536 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2023-11-29 00:41:48,536 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2023-11-29 00:41:48,536 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-11-29 00:41:48,536 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-11-29 00:41:48,536 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-29 00:41:48,537 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-29 00:41:48,537 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-29 00:41:48,537 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-29 00:41:48,539 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 00:41:48,691 INFO L241 CfgBuilder]: Building ICFG [2023-11-29 00:41:48,694 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-29 00:41:49,020 INFO L282 CfgBuilder]: Performing block encoding [2023-11-29 00:41:49,239 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-29 00:41:49,239 INFO L309 CfgBuilder]: Removed 3 assume(true) statements. [2023-11-29 00:41:49,240 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 12:41:49 BoogieIcfgContainer [2023-11-29 00:41:49,240 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-29 00:41:49,242 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-29 00:41:49,242 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-29 00:41:49,245 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-29 00:41:49,246 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.11 12:41:48" (1/3) ... [2023-11-29 00:41:49,246 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7776f7c5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 12:41:49, skipping insertion in model container [2023-11-29 00:41:49,247 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:41:48" (2/3) ... [2023-11-29 00:41:49,247 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7776f7c5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 12:41:49, skipping insertion in model container [2023-11-29 00:41:49,247 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 12:41:49" (3/3) ... [2023-11-29 00:41:49,249 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-more-queue-add-2-nl.wvr.c [2023-11-29 00:41:49,256 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-11-29 00:41:49,264 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-29 00:41:49,264 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-29 00:41:49,265 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-29 00:41:49,304 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-11-29 00:41:49,335 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 33 places, 30 transitions, 74 flow [2023-11-29 00:41:49,362 INFO L124 PetriNetUnfolderBase]: 4/28 cut-off events. [2023-11-29 00:41:49,362 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-29 00:41:49,365 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37 conditions, 28 events. 4/28 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 33 event pairs, 0 based on Foata normal form. 0/23 useless extension candidates. Maximal degree in co-relation 20. Up to 2 conditions per place. [2023-11-29 00:41:49,365 INFO L82 GeneralOperation]: Start removeDead. Operand has 33 places, 30 transitions, 74 flow [2023-11-29 00:41:49,369 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 30 places, 27 transitions, 66 flow [2023-11-29 00:41:49,379 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-29 00:41:49,385 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;@350bab3f, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-29 00:41:49,386 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-11-29 00:41:49,397 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-29 00:41:49,397 INFO L124 PetriNetUnfolderBase]: 4/26 cut-off events. [2023-11-29 00:41:49,397 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-29 00:41:49,398 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 00:41:49,398 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:41:49,399 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 00:41:49,403 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:41:49,404 INFO L85 PathProgramCache]: Analyzing trace with hash 2032880118, now seen corresponding path program 1 times [2023-11-29 00:41:49,412 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:41:49,412 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1388470973] [2023-11-29 00:41:49,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:41:49,413 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:41:49,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:41:49,613 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 00:41:49,613 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:41:49,613 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1388470973] [2023-11-29 00:41:49,614 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1388470973] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 00:41:49,614 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 00:41:49,614 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-29 00:41:49,616 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1375893837] [2023-11-29 00:41:49,617 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:41:49,625 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-29 00:41:49,631 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:41:49,653 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-29 00:41:49,654 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-29 00:41:49,655 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 30 [2023-11-29 00:41:49,657 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 30 places, 27 transitions, 66 flow. Second operand has 2 states, 2 states have (on average 15.5) internal successors, (31), 2 states have internal predecessors, (31), 0 states have call successors, (0), 0 states 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 00:41:49,657 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 00:41:49,658 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 30 [2023-11-29 00:41:49,659 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 00:41:49,753 INFO L124 PetriNetUnfolderBase]: 112/217 cut-off events. [2023-11-29 00:41:49,753 INFO L125 PetriNetUnfolderBase]: For 15/15 co-relation queries the response was YES. [2023-11-29 00:41:49,756 INFO L83 FinitePrefix]: Finished finitePrefix Result has 427 conditions, 217 events. 112/217 cut-off events. For 15/15 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 718 event pairs, 87 based on Foata normal form. 14/212 useless extension candidates. Maximal degree in co-relation 366. Up to 187 conditions per place. [2023-11-29 00:41:49,760 INFO L140 encePairwiseOnDemand]: 29/30 looper letters, 21 selfloop transitions, 0 changer transitions 0/26 dead transitions. [2023-11-29 00:41:49,760 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 31 places, 26 transitions, 106 flow [2023-11-29 00:41:49,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-29 00:41:49,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2023-11-29 00:41:49,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 36 transitions. [2023-11-29 00:41:49,771 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6 [2023-11-29 00:41:49,772 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 36 transitions. [2023-11-29 00:41:49,773 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 36 transitions. [2023-11-29 00:41:49,773 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 00:41:49,776 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 36 transitions. [2023-11-29 00:41:49,778 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 18.0) internal successors, (36), 2 states have internal predecessors, (36), 0 states have call successors, (0), 0 states 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 00:41:49,781 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 30.0) internal successors, (90), 3 states have internal predecessors, (90), 0 states have call successors, (0), 0 states 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 00:41:49,781 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 30.0) internal successors, (90), 3 states have internal predecessors, (90), 0 states have call successors, (0), 0 states 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 00:41:49,783 INFO L175 Difference]: Start difference. First operand has 30 places, 27 transitions, 66 flow. Second operand 2 states and 36 transitions. [2023-11-29 00:41:49,784 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 31 places, 26 transitions, 106 flow [2023-11-29 00:41:49,787 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 27 places, 26 transitions, 98 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-11-29 00:41:49,789 INFO L231 Difference]: Finished difference. Result has 27 places, 26 transitions, 56 flow [2023-11-29 00:41:49,791 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=56, PETRI_DIFFERENCE_MINUEND_PLACES=26, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=56, PETRI_PLACES=27, PETRI_TRANSITIONS=26} [2023-11-29 00:41:49,795 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, -3 predicate places. [2023-11-29 00:41:49,795 INFO L495 AbstractCegarLoop]: Abstraction has has 27 places, 26 transitions, 56 flow [2023-11-29 00:41:49,795 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 15.5) internal successors, (31), 2 states have internal predecessors, (31), 0 states have call successors, (0), 0 states 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 00:41:49,795 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 00:41:49,796 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:41:49,796 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-29 00:41:49,796 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 00:41:49,797 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:41:49,797 INFO L85 PathProgramCache]: Analyzing trace with hash 992840007, now seen corresponding path program 1 times [2023-11-29 00:41:49,797 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:41:49,797 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1594677814] [2023-11-29 00:41:49,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:41:49,798 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:41:49,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:41:49,980 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 00:41:49,981 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:41:49,981 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1594677814] [2023-11-29 00:41:49,981 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1594677814] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 00:41:49,982 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 00:41:49,982 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-29 00:41:49,982 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1992900151] [2023-11-29 00:41:49,982 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:41:49,984 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 00:41:49,984 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:41:49,985 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 00:41:49,985 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 00:41:49,985 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 30 [2023-11-29 00:41:49,986 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 27 places, 26 transitions, 56 flow. Second operand has 3 states, 3 states have (on average 13.0) internal successors, (39), 3 states have internal predecessors, (39), 0 states have call successors, (0), 0 states 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 00:41:49,986 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 00:41:49,986 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 30 [2023-11-29 00:41:49,986 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 00:41:50,111 INFO L124 PetriNetUnfolderBase]: 120/235 cut-off events. [2023-11-29 00:41:50,111 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-11-29 00:41:50,113 INFO L83 FinitePrefix]: Finished finitePrefix Result has 448 conditions, 235 events. 120/235 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 748 event pairs, 37 based on Foata normal form. 3/224 useless extension candidates. Maximal degree in co-relation 445. Up to 168 conditions per place. [2023-11-29 00:41:50,116 INFO L140 encePairwiseOnDemand]: 26/30 looper letters, 25 selfloop transitions, 3 changer transitions 0/33 dead transitions. [2023-11-29 00:41:50,116 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 29 places, 33 transitions, 127 flow [2023-11-29 00:41:50,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 00:41:50,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-29 00:41:50,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 50 transitions. [2023-11-29 00:41:50,118 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5555555555555556 [2023-11-29 00:41:50,118 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 50 transitions. [2023-11-29 00:41:50,118 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 50 transitions. [2023-11-29 00:41:50,119 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 00:41:50,119 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 50 transitions. [2023-11-29 00:41:50,120 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 16.666666666666668) internal successors, (50), 3 states have internal predecessors, (50), 0 states have call successors, (0), 0 states 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 00:41:50,121 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 30.0) internal successors, (120), 4 states have internal predecessors, (120), 0 states have call successors, (0), 0 states 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 00:41:50,121 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 30.0) internal successors, (120), 4 states have internal predecessors, (120), 0 states have call successors, (0), 0 states 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 00:41:50,121 INFO L175 Difference]: Start difference. First operand has 27 places, 26 transitions, 56 flow. Second operand 3 states and 50 transitions. [2023-11-29 00:41:50,122 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 29 places, 33 transitions, 127 flow [2023-11-29 00:41:50,123 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 29 places, 33 transitions, 127 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-29 00:41:50,124 INFO L231 Difference]: Finished difference. Result has 30 places, 28 transitions, 75 flow [2023-11-29 00:41:50,124 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=56, PETRI_DIFFERENCE_MINUEND_PLACES=27, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=75, PETRI_PLACES=30, PETRI_TRANSITIONS=28} [2023-11-29 00:41:50,126 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 0 predicate places. [2023-11-29 00:41:50,126 INFO L495 AbstractCegarLoop]: Abstraction has has 30 places, 28 transitions, 75 flow [2023-11-29 00:41:50,126 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.0) internal successors, (39), 3 states have internal predecessors, (39), 0 states have call successors, (0), 0 states 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 00:41:50,126 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 00:41:50,126 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:41:50,127 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-29 00:41:50,127 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 00:41:50,128 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:41:50,128 INFO L85 PathProgramCache]: Analyzing trace with hash -357843081, now seen corresponding path program 2 times [2023-11-29 00:41:50,128 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:41:50,128 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [814709734] [2023-11-29 00:41:50,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:41:50,129 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:41:50,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:41:50,348 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 00:41:50,348 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:41:50,348 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [814709734] [2023-11-29 00:41:50,348 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [814709734] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 00:41:50,349 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 00:41:50,349 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 00:41:50,349 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1756163719] [2023-11-29 00:41:50,349 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:41:50,350 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 00:41:50,350 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:41:50,351 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 00:41:50,351 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-29 00:41:50,352 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 30 [2023-11-29 00:41:50,352 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 30 places, 28 transitions, 75 flow. Second operand has 4 states, 4 states have (on average 11.5) internal successors, (46), 4 states have internal predecessors, (46), 0 states have call successors, (0), 0 states 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 00:41:50,352 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 00:41:50,352 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 30 [2023-11-29 00:41:50,352 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 00:41:50,488 INFO L124 PetriNetUnfolderBase]: 133/276 cut-off events. [2023-11-29 00:41:50,488 INFO L125 PetriNetUnfolderBase]: For 48/50 co-relation queries the response was YES. [2023-11-29 00:41:50,490 INFO L83 FinitePrefix]: Finished finitePrefix Result has 589 conditions, 276 events. 133/276 cut-off events. For 48/50 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 971 event pairs, 97 based on Foata normal form. 11/272 useless extension candidates. Maximal degree in co-relation 584. Up to 202 conditions per place. [2023-11-29 00:41:50,493 INFO L140 encePairwiseOnDemand]: 25/30 looper letters, 22 selfloop transitions, 2 changer transitions 8/37 dead transitions. [2023-11-29 00:41:50,493 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 33 places, 37 transitions, 159 flow [2023-11-29 00:41:50,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-29 00:41:50,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-29 00:41:50,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 60 transitions. [2023-11-29 00:41:50,496 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5 [2023-11-29 00:41:50,496 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 60 transitions. [2023-11-29 00:41:50,496 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 60 transitions. [2023-11-29 00:41:50,497 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 00:41:50,497 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 60 transitions. [2023-11-29 00:41:50,498 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 15.0) internal successors, (60), 4 states have internal predecessors, (60), 0 states have call successors, (0), 0 states 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 00:41:50,499 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 30.0) internal successors, (150), 5 states have internal predecessors, (150), 0 states have call successors, (0), 0 states 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 00:41:50,500 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 30.0) internal successors, (150), 5 states have internal predecessors, (150), 0 states have call successors, (0), 0 states 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 00:41:50,500 INFO L175 Difference]: Start difference. First operand has 30 places, 28 transitions, 75 flow. Second operand 4 states and 60 transitions. [2023-11-29 00:41:50,500 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 33 places, 37 transitions, 159 flow [2023-11-29 00:41:50,502 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 37 transitions, 156 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-29 00:41:50,503 INFO L231 Difference]: Finished difference. Result has 34 places, 29 transitions, 88 flow [2023-11-29 00:41:50,504 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=72, PETRI_DIFFERENCE_MINUEND_PLACES=29, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=88, PETRI_PLACES=34, PETRI_TRANSITIONS=29} [2023-11-29 00:41:50,505 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 4 predicate places. [2023-11-29 00:41:50,505 INFO L495 AbstractCegarLoop]: Abstraction has has 34 places, 29 transitions, 88 flow [2023-11-29 00:41:50,506 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.5) internal successors, (46), 4 states have internal predecessors, (46), 0 states have call successors, (0), 0 states 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 00:41:50,506 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 00:41:50,506 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:41:50,506 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-29 00:41:50,507 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 00:41:50,508 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:41:50,508 INFO L85 PathProgramCache]: Analyzing trace with hash 2107095792, now seen corresponding path program 1 times [2023-11-29 00:41:50,508 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:41:50,508 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [303785333] [2023-11-29 00:41:50,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:41:50,509 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:41:50,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:41:51,310 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 00:41:51,311 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:41:51,311 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [303785333] [2023-11-29 00:41:51,311 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [303785333] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 00:41:51,312 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 00:41:51,312 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-11-29 00:41:51,312 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [689952421] [2023-11-29 00:41:51,312 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:41:51,313 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-29 00:41:51,313 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:41:51,314 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-29 00:41:51,314 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2023-11-29 00:41:51,365 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 30 [2023-11-29 00:41:51,366 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 29 transitions, 88 flow. Second operand has 10 states, 10 states have (on average 8.0) internal successors, (80), 10 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 00:41:51,366 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 00:41:51,366 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 30 [2023-11-29 00:41:51,366 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 00:41:51,783 INFO L124 PetriNetUnfolderBase]: 182/358 cut-off events. [2023-11-29 00:41:51,783 INFO L125 PetriNetUnfolderBase]: For 74/74 co-relation queries the response was YES. [2023-11-29 00:41:51,785 INFO L83 FinitePrefix]: Finished finitePrefix Result has 782 conditions, 358 events. 182/358 cut-off events. For 74/74 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 1367 event pairs, 13 based on Foata normal form. 1/358 useless extension candidates. Maximal degree in co-relation 775. Up to 211 conditions per place. [2023-11-29 00:41:51,788 INFO L140 encePairwiseOnDemand]: 19/30 looper letters, 45 selfloop transitions, 13 changer transitions 6/68 dead transitions. [2023-11-29 00:41:51,788 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 68 transitions, 315 flow [2023-11-29 00:41:51,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-29 00:41:51,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-11-29 00:41:51,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 124 transitions. [2023-11-29 00:41:51,792 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41333333333333333 [2023-11-29 00:41:51,792 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 124 transitions. [2023-11-29 00:41:51,792 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 124 transitions. [2023-11-29 00:41:51,793 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 00:41:51,793 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 124 transitions. [2023-11-29 00:41:51,794 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 12.4) internal successors, (124), 10 states have internal predecessors, (124), 0 states have call successors, (0), 0 states 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 00:41:51,796 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 30.0) internal successors, (330), 11 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 00:41:51,796 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 30.0) internal successors, (330), 11 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 00:41:51,796 INFO L175 Difference]: Start difference. First operand has 34 places, 29 transitions, 88 flow. Second operand 10 states and 124 transitions. [2023-11-29 00:41:51,797 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 68 transitions, 315 flow [2023-11-29 00:41:51,798 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 68 transitions, 305 flow, removed 4 selfloop flow, removed 2 redundant places. [2023-11-29 00:41:51,800 INFO L231 Difference]: Finished difference. Result has 44 places, 39 transitions, 154 flow [2023-11-29 00:41:51,801 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=80, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=154, PETRI_PLACES=44, PETRI_TRANSITIONS=39} [2023-11-29 00:41:51,802 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 14 predicate places. [2023-11-29 00:41:51,802 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 39 transitions, 154 flow [2023-11-29 00:41:51,802 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.0) internal successors, (80), 10 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 00:41:51,802 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 00:41:51,802 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:41:51,803 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-29 00:41:51,803 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 00:41:51,803 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:41:51,804 INFO L85 PathProgramCache]: Analyzing trace with hash -1231142744, now seen corresponding path program 2 times [2023-11-29 00:41:51,804 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:41:51,804 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1646717863] [2023-11-29 00:41:51,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:41:51,805 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:41:51,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:41:52,454 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 00:41:52,455 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:41:52,455 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1646717863] [2023-11-29 00:41:52,456 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1646717863] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 00:41:52,456 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 00:41:52,456 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-11-29 00:41:52,456 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [659844165] [2023-11-29 00:41:52,456 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:41:52,457 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-29 00:41:52,458 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:41:52,458 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-29 00:41:52,459 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2023-11-29 00:41:52,494 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 30 [2023-11-29 00:41:52,495 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 39 transitions, 154 flow. Second operand has 10 states, 10 states have (on average 8.0) internal successors, (80), 10 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 00:41:52,495 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 00:41:52,495 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 30 [2023-11-29 00:41:52,495 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 00:41:52,868 INFO L124 PetriNetUnfolderBase]: 207/419 cut-off events. [2023-11-29 00:41:52,868 INFO L125 PetriNetUnfolderBase]: For 227/227 co-relation queries the response was YES. [2023-11-29 00:41:52,870 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1136 conditions, 419 events. 207/419 cut-off events. For 227/227 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 1780 event pairs, 30 based on Foata normal form. 1/419 useless extension candidates. Maximal degree in co-relation 1126. Up to 244 conditions per place. [2023-11-29 00:41:52,874 INFO L140 encePairwiseOnDemand]: 19/30 looper letters, 47 selfloop transitions, 20 changer transitions 6/77 dead transitions. [2023-11-29 00:41:52,874 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 77 transitions, 444 flow [2023-11-29 00:41:52,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-29 00:41:52,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-11-29 00:41:52,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 127 transitions. [2023-11-29 00:41:52,877 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42333333333333334 [2023-11-29 00:41:52,877 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 127 transitions. [2023-11-29 00:41:52,877 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 127 transitions. [2023-11-29 00:41:52,878 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 00:41:52,878 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 127 transitions. [2023-11-29 00:41:52,879 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 12.7) internal successors, (127), 10 states have internal predecessors, (127), 0 states have call successors, (0), 0 states 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 00:41:52,880 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 30.0) internal successors, (330), 11 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 00:41:52,881 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 30.0) internal successors, (330), 11 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 00:41:52,881 INFO L175 Difference]: Start difference. First operand has 44 places, 39 transitions, 154 flow. Second operand 10 states and 127 transitions. [2023-11-29 00:41:52,881 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 77 transitions, 444 flow [2023-11-29 00:41:52,885 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 77 transitions, 435 flow, removed 2 selfloop flow, removed 3 redundant places. [2023-11-29 00:41:52,887 INFO L231 Difference]: Finished difference. Result has 55 places, 50 transitions, 276 flow [2023-11-29 00:41:52,887 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=146, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=276, PETRI_PLACES=55, PETRI_TRANSITIONS=50} [2023-11-29 00:41:52,888 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 25 predicate places. [2023-11-29 00:41:52,889 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 50 transitions, 276 flow [2023-11-29 00:41:52,889 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.0) internal successors, (80), 10 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 00:41:52,889 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 00:41:52,889 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:41:52,889 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-29 00:41:52,890 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 00:41:52,890 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:41:52,890 INFO L85 PathProgramCache]: Analyzing trace with hash 1003573930, now seen corresponding path program 3 times [2023-11-29 00:41:52,891 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:41:52,891 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2137506628] [2023-11-29 00:41:52,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:41:52,891 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:41:52,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:41:53,494 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 00:41:53,494 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:41:53,495 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2137506628] [2023-11-29 00:41:53,495 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2137506628] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 00:41:53,495 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 00:41:53,495 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-11-29 00:41:53,495 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1087805186] [2023-11-29 00:41:53,495 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:41:53,496 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-29 00:41:53,496 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:41:53,497 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-29 00:41:53,497 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2023-11-29 00:41:53,541 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 30 [2023-11-29 00:41:53,542 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 50 transitions, 276 flow. Second operand has 10 states, 10 states have (on average 8.0) internal successors, (80), 10 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 00:41:53,542 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 00:41:53,542 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 30 [2023-11-29 00:41:53,542 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 00:41:53,887 INFO L124 PetriNetUnfolderBase]: 225/475 cut-off events. [2023-11-29 00:41:53,888 INFO L125 PetriNetUnfolderBase]: For 563/563 co-relation queries the response was YES. [2023-11-29 00:41:53,890 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1493 conditions, 475 events. 225/475 cut-off events. For 563/563 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 2214 event pairs, 9 based on Foata normal form. 1/476 useless extension candidates. Maximal degree in co-relation 1477. Up to 230 conditions per place. [2023-11-29 00:41:53,894 INFO L140 encePairwiseOnDemand]: 19/30 looper letters, 52 selfloop transitions, 26 changer transitions 6/88 dead transitions. [2023-11-29 00:41:53,894 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 88 transitions, 589 flow [2023-11-29 00:41:53,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-29 00:41:53,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-11-29 00:41:53,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 138 transitions. [2023-11-29 00:41:53,897 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41818181818181815 [2023-11-29 00:41:53,897 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 138 transitions. [2023-11-29 00:41:53,897 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 138 transitions. [2023-11-29 00:41:53,897 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 00:41:53,898 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 138 transitions. [2023-11-29 00:41:53,898 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 12.545454545454545) internal successors, (138), 11 states have internal predecessors, (138), 0 states have call successors, (0), 0 states 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 00:41:53,900 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 30.0) internal successors, (360), 12 states have internal predecessors, (360), 0 states have call successors, (0), 0 states 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 00:41:53,900 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 30.0) internal successors, (360), 12 states have internal predecessors, (360), 0 states have call successors, (0), 0 states 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 00:41:53,901 INFO L175 Difference]: Start difference. First operand has 55 places, 50 transitions, 276 flow. Second operand 11 states and 138 transitions. [2023-11-29 00:41:53,901 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 88 transitions, 589 flow [2023-11-29 00:41:53,906 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 88 transitions, 566 flow, removed 4 selfloop flow, removed 3 redundant places. [2023-11-29 00:41:53,908 INFO L231 Difference]: Finished difference. Result has 64 places, 54 transitions, 351 flow [2023-11-29 00:41:53,908 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=253, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=351, PETRI_PLACES=64, PETRI_TRANSITIONS=54} [2023-11-29 00:41:53,909 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 34 predicate places. [2023-11-29 00:41:53,909 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 54 transitions, 351 flow [2023-11-29 00:41:53,910 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.0) internal successors, (80), 10 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 00:41:53,910 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 00:41:53,910 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:41:53,910 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-29 00:41:53,911 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 00:41:53,911 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:41:53,911 INFO L85 PathProgramCache]: Analyzing trace with hash 2011195514, now seen corresponding path program 4 times [2023-11-29 00:41:53,911 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:41:53,912 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1684295337] [2023-11-29 00:41:53,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:41:53,912 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:41:53,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:41:54,505 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 00:41:54,506 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:41:54,506 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1684295337] [2023-11-29 00:41:54,507 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1684295337] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 00:41:54,507 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 00:41:54,507 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-11-29 00:41:54,508 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1142804532] [2023-11-29 00:41:54,508 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:41:54,508 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-29 00:41:54,509 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:41:54,509 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-29 00:41:54,510 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2023-11-29 00:41:54,543 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 30 [2023-11-29 00:41:54,544 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 54 transitions, 351 flow. Second operand has 10 states, 10 states have (on average 8.0) internal successors, (80), 10 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 00:41:54,544 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 00:41:54,544 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 30 [2023-11-29 00:41:54,544 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 00:41:54,837 INFO L124 PetriNetUnfolderBase]: 224/484 cut-off events. [2023-11-29 00:41:54,837 INFO L125 PetriNetUnfolderBase]: For 1086/1086 co-relation queries the response was YES. [2023-11-29 00:41:54,839 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1660 conditions, 484 events. 224/484 cut-off events. For 1086/1086 co-relation queries the response was YES. Maximal size of possible extension queue 35. Compared 2306 event pairs, 39 based on Foata normal form. 1/485 useless extension candidates. Maximal degree in co-relation 1642. Up to 295 conditions per place. [2023-11-29 00:41:54,843 INFO L140 encePairwiseOnDemand]: 19/30 looper letters, 52 selfloop transitions, 22 changer transitions 6/84 dead transitions. [2023-11-29 00:41:54,843 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 84 transitions, 649 flow [2023-11-29 00:41:54,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-29 00:41:54,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-11-29 00:41:54,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 126 transitions. [2023-11-29 00:41:54,847 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42 [2023-11-29 00:41:54,847 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 126 transitions. [2023-11-29 00:41:54,847 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 126 transitions. [2023-11-29 00:41:54,847 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 00:41:54,847 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 126 transitions. [2023-11-29 00:41:54,848 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 12.6) internal successors, (126), 10 states have internal predecessors, (126), 0 states have call successors, (0), 0 states 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 00:41:54,850 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 30.0) internal successors, (330), 11 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 00:41:54,850 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 30.0) internal successors, (330), 11 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 00:41:54,850 INFO L175 Difference]: Start difference. First operand has 64 places, 54 transitions, 351 flow. Second operand 10 states and 126 transitions. [2023-11-29 00:41:54,850 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 84 transitions, 649 flow [2023-11-29 00:41:54,856 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 84 transitions, 588 flow, removed 17 selfloop flow, removed 6 redundant places. [2023-11-29 00:41:54,859 INFO L231 Difference]: Finished difference. Result has 69 places, 57 transitions, 392 flow [2023-11-29 00:41:54,859 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=306, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=392, PETRI_PLACES=69, PETRI_TRANSITIONS=57} [2023-11-29 00:41:54,860 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 39 predicate places. [2023-11-29 00:41:54,860 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 57 transitions, 392 flow [2023-11-29 00:41:54,860 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.0) internal successors, (80), 10 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 00:41:54,861 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 00:41:54,861 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:41:54,861 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-29 00:41:54,861 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 00:41:54,862 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:41:54,862 INFO L85 PathProgramCache]: Analyzing trace with hash -1313799150, now seen corresponding path program 5 times [2023-11-29 00:41:54,862 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:41:54,862 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [496547568] [2023-11-29 00:41:54,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:41:54,862 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:41:54,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:41:55,520 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 00:41:55,520 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:41:55,520 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [496547568] [2023-11-29 00:41:55,520 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [496547568] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 00:41:55,520 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 00:41:55,520 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-11-29 00:41:55,521 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [34287057] [2023-11-29 00:41:55,521 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:41:55,521 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-29 00:41:55,521 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:41:55,522 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-29 00:41:55,522 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2023-11-29 00:41:55,567 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 30 [2023-11-29 00:41:55,567 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 57 transitions, 392 flow. Second operand has 10 states, 10 states have (on average 8.0) internal successors, (80), 10 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 00:41:55,568 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 00:41:55,568 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 30 [2023-11-29 00:41:55,568 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 00:41:55,827 INFO L124 PetriNetUnfolderBase]: 238/523 cut-off events. [2023-11-29 00:41:55,827 INFO L125 PetriNetUnfolderBase]: For 1103/1103 co-relation queries the response was YES. [2023-11-29 00:41:55,829 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1805 conditions, 523 events. 238/523 cut-off events. For 1103/1103 co-relation queries the response was YES. Maximal size of possible extension queue 41. Compared 2588 event pairs, 31 based on Foata normal form. 1/524 useless extension candidates. Maximal degree in co-relation 1784. Up to 320 conditions per place. [2023-11-29 00:41:55,833 INFO L140 encePairwiseOnDemand]: 19/30 looper letters, 56 selfloop transitions, 23 changer transitions 6/89 dead transitions. [2023-11-29 00:41:55,833 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 89 transitions, 691 flow [2023-11-29 00:41:55,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-29 00:41:55,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-11-29 00:41:55,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 127 transitions. [2023-11-29 00:41:55,835 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42333333333333334 [2023-11-29 00:41:55,835 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 127 transitions. [2023-11-29 00:41:55,835 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 127 transitions. [2023-11-29 00:41:55,835 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 00:41:55,835 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 127 transitions. [2023-11-29 00:41:55,836 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 12.7) internal successors, (127), 10 states have internal predecessors, (127), 0 states have call successors, (0), 0 states 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 00:41:55,837 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 30.0) internal successors, (330), 11 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 00:41:55,837 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 30.0) internal successors, (330), 11 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 00:41:55,837 INFO L175 Difference]: Start difference. First operand has 69 places, 57 transitions, 392 flow. Second operand 10 states and 127 transitions. [2023-11-29 00:41:55,837 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 89 transitions, 691 flow [2023-11-29 00:41:55,842 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 89 transitions, 648 flow, removed 8 selfloop flow, removed 5 redundant places. [2023-11-29 00:41:55,844 INFO L231 Difference]: Finished difference. Result has 75 places, 60 transitions, 436 flow [2023-11-29 00:41:55,844 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=351, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=436, PETRI_PLACES=75, PETRI_TRANSITIONS=60} [2023-11-29 00:41:55,845 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 45 predicate places. [2023-11-29 00:41:55,845 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 60 transitions, 436 flow [2023-11-29 00:41:55,845 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.0) internal successors, (80), 10 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 00:41:55,846 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 00:41:55,846 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:41:55,846 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-29 00:41:55,846 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 00:41:55,846 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:41:55,847 INFO L85 PathProgramCache]: Analyzing trace with hash -1011459612, now seen corresponding path program 6 times [2023-11-29 00:41:55,847 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:41:55,847 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [177618719] [2023-11-29 00:41:55,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:41:55,847 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:41:55,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:41:56,250 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 00:41:56,250 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:41:56,250 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [177618719] [2023-11-29 00:41:56,250 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [177618719] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 00:41:56,250 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 00:41:56,250 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-11-29 00:41:56,250 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2137468930] [2023-11-29 00:41:56,251 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:41:56,251 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-29 00:41:56,251 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:41:56,252 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-29 00:41:56,252 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2023-11-29 00:41:56,282 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 30 [2023-11-29 00:41:56,282 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 60 transitions, 436 flow. Second operand has 10 states, 10 states have (on average 8.0) internal successors, (80), 10 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 00:41:56,282 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 00:41:56,283 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 30 [2023-11-29 00:41:56,283 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 00:41:56,536 INFO L124 PetriNetUnfolderBase]: 232/506 cut-off events. [2023-11-29 00:41:56,537 INFO L125 PetriNetUnfolderBase]: For 1650/1658 co-relation queries the response was YES. [2023-11-29 00:41:56,538 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1875 conditions, 506 events. 232/506 cut-off events. For 1650/1658 co-relation queries the response was YES. Maximal size of possible extension queue 40. Compared 2486 event pairs, 31 based on Foata normal form. 9/515 useless extension candidates. Maximal degree in co-relation 1853. Up to 325 conditions per place. [2023-11-29 00:41:56,542 INFO L140 encePairwiseOnDemand]: 19/30 looper letters, 49 selfloop transitions, 22 changer transitions 9/84 dead transitions. [2023-11-29 00:41:56,542 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 84 transitions, 701 flow [2023-11-29 00:41:56,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-29 00:41:56,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-11-29 00:41:56,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 121 transitions. [2023-11-29 00:41:56,543 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4033333333333333 [2023-11-29 00:41:56,544 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 121 transitions. [2023-11-29 00:41:56,544 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 121 transitions. [2023-11-29 00:41:56,544 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 00:41:56,544 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 121 transitions. [2023-11-29 00:41:56,545 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 12.1) internal successors, (121), 10 states have internal predecessors, (121), 0 states have call successors, (0), 0 states 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 00:41:56,546 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 30.0) internal successors, (330), 11 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 00:41:56,546 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 30.0) internal successors, (330), 11 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 00:41:56,546 INFO L175 Difference]: Start difference. First operand has 75 places, 60 transitions, 436 flow. Second operand 10 states and 121 transitions. [2023-11-29 00:41:56,546 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 84 transitions, 701 flow [2023-11-29 00:41:56,551 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 84 transitions, 644 flow, removed 8 selfloop flow, removed 7 redundant places. [2023-11-29 00:41:56,553 INFO L231 Difference]: Finished difference. Result has 78 places, 60 transitions, 432 flow [2023-11-29 00:41:56,553 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=381, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=432, PETRI_PLACES=78, PETRI_TRANSITIONS=60} [2023-11-29 00:41:56,554 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 48 predicate places. [2023-11-29 00:41:56,554 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 60 transitions, 432 flow [2023-11-29 00:41:56,554 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.0) internal successors, (80), 10 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 00:41:56,554 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 00:41:56,554 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:41:56,555 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-11-29 00:41:56,555 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 00:41:56,555 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:41:56,555 INFO L85 PathProgramCache]: Analyzing trace with hash -369583836, now seen corresponding path program 7 times [2023-11-29 00:41:56,555 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:41:56,556 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [946491943] [2023-11-29 00:41:56,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:41:56,556 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:41:56,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:41:57,032 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 00:41:57,032 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:41:57,032 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [946491943] [2023-11-29 00:41:57,033 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [946491943] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 00:41:57,033 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 00:41:57,033 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-11-29 00:41:57,033 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1764231722] [2023-11-29 00:41:57,033 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:41:57,034 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-29 00:41:57,034 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:41:57,035 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-29 00:41:57,035 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2023-11-29 00:41:57,078 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 30 [2023-11-29 00:41:57,078 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 60 transitions, 432 flow. Second operand has 10 states, 10 states have (on average 8.0) internal successors, (80), 10 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 00:41:57,078 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 00:41:57,078 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 30 [2023-11-29 00:41:57,079 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 00:41:57,377 INFO L124 PetriNetUnfolderBase]: 244/539 cut-off events. [2023-11-29 00:41:57,378 INFO L125 PetriNetUnfolderBase]: For 1843/1855 co-relation queries the response was YES. [2023-11-29 00:41:57,379 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1992 conditions, 539 events. 244/539 cut-off events. For 1843/1855 co-relation queries the response was YES. Maximal size of possible extension queue 44. Compared 2720 event pairs, 41 based on Foata normal form. 3/542 useless extension candidates. Maximal degree in co-relation 1969. Up to 332 conditions per place. [2023-11-29 00:41:57,383 INFO L140 encePairwiseOnDemand]: 19/30 looper letters, 59 selfloop transitions, 23 changer transitions 6/92 dead transitions. [2023-11-29 00:41:57,383 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 92 transitions, 780 flow [2023-11-29 00:41:57,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-29 00:41:57,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-11-29 00:41:57,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 129 transitions. [2023-11-29 00:41:57,385 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43 [2023-11-29 00:41:57,385 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 129 transitions. [2023-11-29 00:41:57,385 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 129 transitions. [2023-11-29 00:41:57,386 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 00:41:57,386 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 129 transitions. [2023-11-29 00:41:57,386 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 12.9) internal successors, (129), 10 states have internal predecessors, (129), 0 states have call successors, (0), 0 states 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 00:41:57,387 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 30.0) internal successors, (330), 11 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 00:41:57,388 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 30.0) internal successors, (330), 11 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 00:41:57,388 INFO L175 Difference]: Start difference. First operand has 78 places, 60 transitions, 432 flow. Second operand 10 states and 129 transitions. [2023-11-29 00:41:57,388 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 92 transitions, 780 flow [2023-11-29 00:41:57,394 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 92 transitions, 726 flow, removed 5 selfloop flow, removed 8 redundant places. [2023-11-29 00:41:57,396 INFO L231 Difference]: Finished difference. Result has 80 places, 63 transitions, 475 flow [2023-11-29 00:41:57,396 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=380, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=475, PETRI_PLACES=80, PETRI_TRANSITIONS=63} [2023-11-29 00:41:57,397 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 50 predicate places. [2023-11-29 00:41:57,397 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 63 transitions, 475 flow [2023-11-29 00:41:57,397 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.0) internal successors, (80), 10 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 00:41:57,397 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 00:41:57,397 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:41:57,398 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-11-29 00:41:57,398 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 00:41:57,398 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:41:57,398 INFO L85 PathProgramCache]: Analyzing trace with hash 955272416, now seen corresponding path program 8 times [2023-11-29 00:41:57,399 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:41:57,399 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2105491475] [2023-11-29 00:41:57,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:41:57,399 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:41:57,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:41:57,787 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 00:41:57,787 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:41:57,787 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2105491475] [2023-11-29 00:41:57,788 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2105491475] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 00:41:57,788 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 00:41:57,788 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-11-29 00:41:57,788 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1928275107] [2023-11-29 00:41:57,788 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:41:57,788 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-29 00:41:57,789 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:41:57,789 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-29 00:41:57,789 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2023-11-29 00:41:57,817 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 30 [2023-11-29 00:41:57,817 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 63 transitions, 475 flow. Second operand has 10 states, 10 states have (on average 8.0) internal successors, (80), 10 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 00:41:57,817 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 00:41:57,818 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 30 [2023-11-29 00:41:57,818 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 00:41:58,054 INFO L124 PetriNetUnfolderBase]: 238/522 cut-off events. [2023-11-29 00:41:58,055 INFO L125 PetriNetUnfolderBase]: For 2568/2596 co-relation queries the response was YES. [2023-11-29 00:41:58,057 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2058 conditions, 522 events. 238/522 cut-off events. For 2568/2596 co-relation queries the response was YES. Maximal size of possible extension queue 43. Compared 2610 event pairs, 41 based on Foata normal form. 11/533 useless extension candidates. Maximal degree in co-relation 2033. Up to 337 conditions per place. [2023-11-29 00:41:58,061 INFO L140 encePairwiseOnDemand]: 19/30 looper letters, 52 selfloop transitions, 22 changer transitions 9/87 dead transitions. [2023-11-29 00:41:58,061 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 87 transitions, 781 flow [2023-11-29 00:41:58,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-29 00:41:58,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-11-29 00:41:58,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 123 transitions. [2023-11-29 00:41:58,063 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41 [2023-11-29 00:41:58,063 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 123 transitions. [2023-11-29 00:41:58,063 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 123 transitions. [2023-11-29 00:41:58,063 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 00:41:58,063 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 123 transitions. [2023-11-29 00:41:58,064 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 12.3) internal successors, (123), 10 states have internal predecessors, (123), 0 states have call successors, (0), 0 states 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 00:41:58,065 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 30.0) internal successors, (330), 11 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 00:41:58,065 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 30.0) internal successors, (330), 11 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 00:41:58,065 INFO L175 Difference]: Start difference. First operand has 80 places, 63 transitions, 475 flow. Second operand 10 states and 123 transitions. [2023-11-29 00:41:58,065 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 87 transitions, 781 flow [2023-11-29 00:41:58,072 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 87 transitions, 714 flow, removed 13 selfloop flow, removed 7 redundant places. [2023-11-29 00:41:58,074 INFO L231 Difference]: Finished difference. Result has 83 places, 63 transitions, 463 flow [2023-11-29 00:41:58,074 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=412, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=463, PETRI_PLACES=83, PETRI_TRANSITIONS=63} [2023-11-29 00:41:58,075 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 53 predicate places. [2023-11-29 00:41:58,075 INFO L495 AbstractCegarLoop]: Abstraction has has 83 places, 63 transitions, 463 flow [2023-11-29 00:41:58,075 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.0) internal successors, (80), 10 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 00:41:58,076 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 00:41:58,076 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:41:58,076 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-11-29 00:41:58,076 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 00:41:58,076 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:41:58,076 INFO L85 PathProgramCache]: Analyzing trace with hash 683045202, now seen corresponding path program 9 times [2023-11-29 00:41:58,077 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:41:58,077 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [560622690] [2023-11-29 00:41:58,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:41:58,077 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:41:58,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:41:58,569 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 00:41:58,569 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:41:58,569 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [560622690] [2023-11-29 00:41:58,569 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [560622690] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 00:41:58,570 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 00:41:58,570 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-11-29 00:41:58,570 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1302616846] [2023-11-29 00:41:58,570 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:41:58,570 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-29 00:41:58,571 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:41:58,572 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-29 00:41:58,572 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2023-11-29 00:41:58,618 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 30 [2023-11-29 00:41:58,618 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 63 transitions, 463 flow. Second operand has 10 states, 10 states have (on average 8.0) internal successors, (80), 10 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 00:41:58,618 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 00:41:58,618 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 30 [2023-11-29 00:41:58,618 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 00:41:59,000 INFO L124 PetriNetUnfolderBase]: 254/558 cut-off events. [2023-11-29 00:41:59,000 INFO L125 PetriNetUnfolderBase]: For 2813/2837 co-relation queries the response was YES. [2023-11-29 00:41:59,003 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2188 conditions, 558 events. 254/558 cut-off events. For 2813/2837 co-relation queries the response was YES. Maximal size of possible extension queue 43. Compared 2786 event pairs, 48 based on Foata normal form. 5/562 useless extension candidates. Maximal degree in co-relation 2162. Up to 344 conditions per place. [2023-11-29 00:41:59,008 INFO L140 encePairwiseOnDemand]: 19/30 looper letters, 62 selfloop transitions, 22 changer transitions 6/94 dead transitions. [2023-11-29 00:41:59,008 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 94 transitions, 834 flow [2023-11-29 00:41:59,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-29 00:41:59,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-11-29 00:41:59,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 130 transitions. [2023-11-29 00:41:59,010 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43333333333333335 [2023-11-29 00:41:59,010 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 130 transitions. [2023-11-29 00:41:59,011 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 130 transitions. [2023-11-29 00:41:59,011 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 00:41:59,011 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 130 transitions. [2023-11-29 00:41:59,012 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 13.0) internal successors, (130), 10 states have internal predecessors, (130), 0 states have call successors, (0), 0 states 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 00:41:59,013 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 30.0) internal successors, (330), 11 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 00:41:59,013 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 30.0) internal successors, (330), 11 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 00:41:59,013 INFO L175 Difference]: Start difference. First operand has 83 places, 63 transitions, 463 flow. Second operand 10 states and 130 transitions. [2023-11-29 00:41:59,013 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 94 transitions, 834 flow [2023-11-29 00:41:59,023 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 94 transitions, 778 flow, removed 6 selfloop flow, removed 8 redundant places. [2023-11-29 00:41:59,025 INFO L231 Difference]: Finished difference. Result has 85 places, 66 transitions, 512 flow [2023-11-29 00:41:59,026 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=409, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=512, PETRI_PLACES=85, PETRI_TRANSITIONS=66} [2023-11-29 00:41:59,027 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 55 predicate places. [2023-11-29 00:41:59,027 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 66 transitions, 512 flow [2023-11-29 00:41:59,027 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.0) internal successors, (80), 10 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 00:41:59,027 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 00:41:59,028 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:41:59,028 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-11-29 00:41:59,028 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 00:41:59,029 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:41:59,029 INFO L85 PathProgramCache]: Analyzing trace with hash -2132823730, now seen corresponding path program 10 times [2023-11-29 00:41:59,029 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:41:59,029 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1079472828] [2023-11-29 00:41:59,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:41:59,029 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:41:59,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:41:59,449 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 00:41:59,449 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:41:59,449 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1079472828] [2023-11-29 00:41:59,450 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1079472828] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 00:41:59,450 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 00:41:59,450 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-11-29 00:41:59,450 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [744547969] [2023-11-29 00:41:59,450 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:41:59,451 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-29 00:41:59,451 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:41:59,452 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-29 00:41:59,452 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2023-11-29 00:41:59,486 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 30 [2023-11-29 00:41:59,487 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 66 transitions, 512 flow. Second operand has 10 states, 10 states have (on average 8.0) internal successors, (80), 10 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 00:41:59,487 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 00:41:59,487 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 30 [2023-11-29 00:41:59,487 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 00:41:59,820 INFO L124 PetriNetUnfolderBase]: 248/541 cut-off events. [2023-11-29 00:41:59,821 INFO L125 PetriNetUnfolderBase]: For 3722/3764 co-relation queries the response was YES. [2023-11-29 00:41:59,823 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2240 conditions, 541 events. 248/541 cut-off events. For 3722/3764 co-relation queries the response was YES. Maximal size of possible extension queue 42. Compared 2672 event pairs, 48 based on Foata normal form. 13/553 useless extension candidates. Maximal degree in co-relation 2212. Up to 349 conditions per place. [2023-11-29 00:41:59,828 INFO L140 encePairwiseOnDemand]: 19/30 looper letters, 55 selfloop transitions, 21 changer transitions 9/89 dead transitions. [2023-11-29 00:41:59,828 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 89 transitions, 825 flow [2023-11-29 00:41:59,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-29 00:41:59,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-11-29 00:41:59,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 124 transitions. [2023-11-29 00:41:59,830 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41333333333333333 [2023-11-29 00:41:59,830 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 124 transitions. [2023-11-29 00:41:59,830 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 124 transitions. [2023-11-29 00:41:59,830 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 00:41:59,830 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 124 transitions. [2023-11-29 00:41:59,831 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 12.4) internal successors, (124), 10 states have internal predecessors, (124), 0 states have call successors, (0), 0 states 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 00:41:59,832 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 30.0) internal successors, (330), 11 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 00:41:59,833 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 30.0) internal successors, (330), 11 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 00:41:59,833 INFO L175 Difference]: Start difference. First operand has 85 places, 66 transitions, 512 flow. Second operand 10 states and 124 transitions. [2023-11-29 00:41:59,833 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 89 transitions, 825 flow [2023-11-29 00:41:59,844 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 89 transitions, 750 flow, removed 18 selfloop flow, removed 7 redundant places. [2023-11-29 00:41:59,846 INFO L231 Difference]: Finished difference. Result has 88 places, 66 transitions, 492 flow [2023-11-29 00:41:59,846 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=443, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=492, PETRI_PLACES=88, PETRI_TRANSITIONS=66} [2023-11-29 00:41:59,847 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 58 predicate places. [2023-11-29 00:41:59,847 INFO L495 AbstractCegarLoop]: Abstraction has has 88 places, 66 transitions, 492 flow [2023-11-29 00:41:59,847 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.0) internal successors, (80), 10 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 00:41:59,848 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 00:41:59,848 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:41:59,848 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-11-29 00:41:59,848 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 00:41:59,848 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:41:59,848 INFO L85 PathProgramCache]: Analyzing trace with hash 1351556760, now seen corresponding path program 1 times [2023-11-29 00:41:59,849 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:41:59,849 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [284340326] [2023-11-29 00:41:59,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:41:59,849 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:41:59,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:41:59,989 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:41:59,990 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:41:59,990 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [284340326] [2023-11-29 00:41:59,990 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [284340326] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 00:41:59,990 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1288167882] [2023-11-29 00:41:59,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:41:59,990 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:41:59,990 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5de6e5a5-dca5-4d1c-8175-3ad29fb43980/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:41:59,994 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5de6e5a5-dca5-4d1c-8175-3ad29fb43980/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:41:59,997 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5de6e5a5-dca5-4d1c-8175-3ad29fb43980/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-29 00:42:00,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:42:00,117 INFO L262 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-29 00:42:00,123 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:42:00,253 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:42:00,253 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:42:00,381 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:42:00,381 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1288167882] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 00:42:00,381 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 00:42:00,381 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2023-11-29 00:42:00,381 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1949389207] [2023-11-29 00:42:00,382 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 00:42:00,382 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-29 00:42:00,383 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:42:00,383 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-29 00:42:00,384 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2023-11-29 00:42:00,384 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 30 [2023-11-29 00:42:00,384 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 66 transitions, 492 flow. Second operand has 12 states, 12 states have (on average 10.583333333333334) internal successors, (127), 12 states have internal predecessors, (127), 0 states have call successors, (0), 0 states 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 00:42:00,384 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 00:42:00,385 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 30 [2023-11-29 00:42:00,385 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 00:42:00,679 INFO L124 PetriNetUnfolderBase]: 399/948 cut-off events. [2023-11-29 00:42:00,679 INFO L125 PetriNetUnfolderBase]: For 6931/6981 co-relation queries the response was YES. [2023-11-29 00:42:00,684 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3913 conditions, 948 events. 399/948 cut-off events. For 6931/6981 co-relation queries the response was YES. Maximal size of possible extension queue 71. Compared 5747 event pairs, 198 based on Foata normal form. 38/985 useless extension candidates. Maximal degree in co-relation 3884. Up to 410 conditions per place. [2023-11-29 00:42:00,692 INFO L140 encePairwiseOnDemand]: 25/30 looper letters, 108 selfloop transitions, 5 changer transitions 10/128 dead transitions. [2023-11-29 00:42:00,692 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 128 transitions, 1211 flow [2023-11-29 00:42:00,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-29 00:42:00,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-29 00:42:00,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 91 transitions. [2023-11-29 00:42:00,694 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5055555555555555 [2023-11-29 00:42:00,694 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 91 transitions. [2023-11-29 00:42:00,694 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 91 transitions. [2023-11-29 00:42:00,694 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 00:42:00,694 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 91 transitions. [2023-11-29 00:42:00,695 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 15.166666666666666) internal successors, (91), 6 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 00:42:00,696 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 30.0) internal successors, (210), 7 states have internal predecessors, (210), 0 states have call successors, (0), 0 states 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 00:42:00,696 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 30.0) internal successors, (210), 7 states have internal predecessors, (210), 0 states have call successors, (0), 0 states 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 00:42:00,696 INFO L175 Difference]: Start difference. First operand has 88 places, 66 transitions, 492 flow. Second operand 6 states and 91 transitions. [2023-11-29 00:42:00,696 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 128 transitions, 1211 flow [2023-11-29 00:42:00,713 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 128 transitions, 1101 flow, removed 12 selfloop flow, removed 8 redundant places. [2023-11-29 00:42:00,716 INFO L231 Difference]: Finished difference. Result has 86 places, 69 transitions, 481 flow [2023-11-29 00:42:00,717 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=438, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=481, PETRI_PLACES=86, PETRI_TRANSITIONS=69} [2023-11-29 00:42:00,718 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 56 predicate places. [2023-11-29 00:42:00,718 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 69 transitions, 481 flow [2023-11-29 00:42:00,718 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 10.583333333333334) internal successors, (127), 12 states have internal predecessors, (127), 0 states have call successors, (0), 0 states 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 00:42:00,718 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 00:42:00,718 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:42:00,727 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5de6e5a5-dca5-4d1c-8175-3ad29fb43980/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-29 00:42:00,919 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5de6e5a5-dca5-4d1c-8175-3ad29fb43980/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:42:00,919 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 00:42:00,920 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:42:00,920 INFO L85 PathProgramCache]: Analyzing trace with hash -660659320, now seen corresponding path program 1 times [2023-11-29 00:42:00,920 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:42:00,920 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1721324397] [2023-11-29 00:42:00,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:42:00,921 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:42:00,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:42:01,091 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:42:01,091 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:42:01,091 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1721324397] [2023-11-29 00:42:01,092 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1721324397] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 00:42:01,092 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1460419337] [2023-11-29 00:42:01,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:42:01,092 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:42:01,092 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5de6e5a5-dca5-4d1c-8175-3ad29fb43980/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:42:01,094 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5de6e5a5-dca5-4d1c-8175-3ad29fb43980/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:42:01,102 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5de6e5a5-dca5-4d1c-8175-3ad29fb43980/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-29 00:42:01,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:42:01,229 INFO L262 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-29 00:42:01,232 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:42:01,283 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 00:42:01,283 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 00:42:01,284 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1460419337] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 00:42:01,284 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-29 00:42:01,284 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 7 [2023-11-29 00:42:01,284 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1920590650] [2023-11-29 00:42:01,284 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:42:01,285 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 00:42:01,285 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:42:01,286 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 00:42:01,286 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2023-11-29 00:42:01,286 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 30 [2023-11-29 00:42:01,286 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 69 transitions, 481 flow. Second operand has 4 states, 4 states have (on average 12.25) internal successors, (49), 4 states have internal predecessors, (49), 0 states have call successors, (0), 0 states 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 00:42:01,287 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 00:42:01,287 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 30 [2023-11-29 00:42:01,287 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 00:42:01,540 INFO L124 PetriNetUnfolderBase]: 368/947 cut-off events. [2023-11-29 00:42:01,540 INFO L125 PetriNetUnfolderBase]: For 7342/7480 co-relation queries the response was YES. [2023-11-29 00:42:01,544 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3759 conditions, 947 events. 368/947 cut-off events. For 7342/7480 co-relation queries the response was YES. Maximal size of possible extension queue 74. Compared 5899 event pairs, 103 based on Foata normal form. 94/1040 useless extension candidates. Maximal degree in co-relation 3728. Up to 363 conditions per place. [2023-11-29 00:42:01,550 INFO L140 encePairwiseOnDemand]: 26/30 looper letters, 58 selfloop transitions, 7 changer transitions 26/96 dead transitions. [2023-11-29 00:42:01,550 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 96 transitions, 817 flow [2023-11-29 00:42:01,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-29 00:42:01,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-29 00:42:01,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 81 transitions. [2023-11-29 00:42:01,552 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.675 [2023-11-29 00:42:01,552 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 81 transitions. [2023-11-29 00:42:01,552 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 81 transitions. [2023-11-29 00:42:01,552 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 00:42:01,552 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 81 transitions. [2023-11-29 00:42:01,553 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 20.25) internal successors, (81), 4 states have internal predecessors, (81), 0 states have call successors, (0), 0 states 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 00:42:01,554 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 30.0) internal successors, (150), 5 states have internal predecessors, (150), 0 states have call successors, (0), 0 states 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 00:42:01,554 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 30.0) internal successors, (150), 5 states have internal predecessors, (150), 0 states have call successors, (0), 0 states 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 00:42:01,554 INFO L175 Difference]: Start difference. First operand has 86 places, 69 transitions, 481 flow. Second operand 4 states and 81 transitions. [2023-11-29 00:42:01,554 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 96 transitions, 817 flow [2023-11-29 00:42:01,570 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 96 transitions, 793 flow, removed 9 selfloop flow, removed 4 redundant places. [2023-11-29 00:42:01,572 INFO L231 Difference]: Finished difference. Result has 87 places, 42 transitions, 298 flow [2023-11-29 00:42:01,573 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=415, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=298, PETRI_PLACES=87, PETRI_TRANSITIONS=42} [2023-11-29 00:42:01,574 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 57 predicate places. [2023-11-29 00:42:01,574 INFO L495 AbstractCegarLoop]: Abstraction has has 87 places, 42 transitions, 298 flow [2023-11-29 00:42:01,574 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.25) internal successors, (49), 4 states have internal predecessors, (49), 0 states have call successors, (0), 0 states 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 00:42:01,574 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 00:42:01,574 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:42:01,581 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5de6e5a5-dca5-4d1c-8175-3ad29fb43980/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-11-29 00:42:01,777 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5de6e5a5-dca5-4d1c-8175-3ad29fb43980/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-11-29 00:42:01,778 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 00:42:01,778 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:42:01,778 INFO L85 PathProgramCache]: Analyzing trace with hash -5493835, now seen corresponding path program 2 times [2023-11-29 00:42:01,778 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:42:01,778 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [774031385] [2023-11-29 00:42:01,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:42:01,778 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:42:01,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:42:02,349 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:42:02,350 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:42:02,350 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [774031385] [2023-11-29 00:42:02,350 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [774031385] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 00:42:02,350 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1115539497] [2023-11-29 00:42:02,350 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 00:42:02,350 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:42:02,351 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5de6e5a5-dca5-4d1c-8175-3ad29fb43980/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:42:02,351 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5de6e5a5-dca5-4d1c-8175-3ad29fb43980/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:42:02,357 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5de6e5a5-dca5-4d1c-8175-3ad29fb43980/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-29 00:42:02,545 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 00:42:02,545 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 00:42:02,547 INFO L262 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 19 conjunts are in the unsatisfiable core [2023-11-29 00:42:02,549 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:42:02,739 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2023-11-29 00:42:02,774 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:42:02,774 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:42:02,923 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-11-29 00:42:02,923 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 12 [2023-11-29 00:42:03,155 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:42:03,155 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1115539497] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 00:42:03,155 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 00:42:03,155 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 8] total 21 [2023-11-29 00:42:03,155 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1693430511] [2023-11-29 00:42:03,156 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 00:42:03,156 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-11-29 00:42:03,157 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:42:03,157 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-11-29 00:42:03,157 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=367, Unknown=0, NotChecked=0, Total=462 [2023-11-29 00:42:03,167 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 30 [2023-11-29 00:42:03,167 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 42 transitions, 298 flow. Second operand has 22 states, 22 states have (on average 7.681818181818182) internal successors, (169), 22 states have internal predecessors, (169), 0 states have call successors, (0), 0 states 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 00:42:03,167 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 00:42:03,167 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 30 [2023-11-29 00:42:03,168 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 00:42:04,282 INFO L124 PetriNetUnfolderBase]: 862/1714 cut-off events. [2023-11-29 00:42:04,282 INFO L125 PetriNetUnfolderBase]: For 15339/15339 co-relation queries the response was YES. [2023-11-29 00:42:04,290 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7161 conditions, 1714 events. 862/1714 cut-off events. For 15339/15339 co-relation queries the response was YES. Maximal size of possible extension queue 79. Compared 9476 event pairs, 90 based on Foata normal form. 130/1843 useless extension candidates. Maximal degree in co-relation 7130. Up to 343 conditions per place. [2023-11-29 00:42:04,303 INFO L140 encePairwiseOnDemand]: 22/30 looper letters, 123 selfloop transitions, 20 changer transitions 8/154 dead transitions. [2023-11-29 00:42:04,303 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 154 transitions, 1378 flow [2023-11-29 00:42:04,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-29 00:42:04,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-11-29 00:42:04,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 191 transitions. [2023-11-29 00:42:04,306 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45476190476190476 [2023-11-29 00:42:04,306 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 191 transitions. [2023-11-29 00:42:04,306 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 191 transitions. [2023-11-29 00:42:04,306 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 00:42:04,306 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 191 transitions. [2023-11-29 00:42:04,307 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 13.642857142857142) internal successors, (191), 14 states have internal predecessors, (191), 0 states have call successors, (0), 0 states 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 00:42:04,309 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 30.0) internal successors, (450), 15 states have internal predecessors, (450), 0 states have call successors, (0), 0 states 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 00:42:04,309 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 30.0) internal successors, (450), 15 states have internal predecessors, (450), 0 states have call successors, (0), 0 states 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 00:42:04,309 INFO L175 Difference]: Start difference. First operand has 87 places, 42 transitions, 298 flow. Second operand 14 states and 191 transitions. [2023-11-29 00:42:04,309 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 154 transitions, 1378 flow [2023-11-29 00:42:04,332 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 154 transitions, 1053 flow, removed 148 selfloop flow, removed 17 redundant places. [2023-11-29 00:42:04,335 INFO L231 Difference]: Finished difference. Result has 69 places, 57 transitions, 446 flow [2023-11-29 00:42:04,335 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=216, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=446, PETRI_PLACES=69, PETRI_TRANSITIONS=57} [2023-11-29 00:42:04,336 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 39 predicate places. [2023-11-29 00:42:04,336 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 57 transitions, 446 flow [2023-11-29 00:42:04,337 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 7.681818181818182) internal successors, (169), 22 states have internal predecessors, (169), 0 states have call successors, (0), 0 states 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 00:42:04,337 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 00:42:04,337 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:42:04,344 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5de6e5a5-dca5-4d1c-8175-3ad29fb43980/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-11-29 00:42:04,537 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5de6e5a5-dca5-4d1c-8175-3ad29fb43980/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-11-29 00:42:04,538 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 00:42:04,538 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:42:04,538 INFO L85 PathProgramCache]: Analyzing trace with hash -1592843966, now seen corresponding path program 3 times [2023-11-29 00:42:04,538 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:42:04,539 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [792948918] [2023-11-29 00:42:04,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:42:04,539 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:42:04,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:42:05,645 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:42:05,646 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:42:05,646 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [792948918] [2023-11-29 00:42:05,646 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [792948918] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 00:42:05,646 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1608489728] [2023-11-29 00:42:05,647 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-29 00:42:05,647 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:42:05,647 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5de6e5a5-dca5-4d1c-8175-3ad29fb43980/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:42:05,648 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5de6e5a5-dca5-4d1c-8175-3ad29fb43980/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:42:05,651 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5de6e5a5-dca5-4d1c-8175-3ad29fb43980/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-29 00:42:05,958 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-29 00:42:05,958 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 00:42:05,960 INFO L262 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-29 00:42:05,962 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:42:06,050 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-29 00:42:06,050 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:42:06,101 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-11-29 00:42:06,102 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 12 [2023-11-29 00:42:06,125 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-29 00:42:06,126 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1608489728] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 00:42:06,126 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 00:42:06,126 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 4, 4] total 13 [2023-11-29 00:42:06,126 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [974028353] [2023-11-29 00:42:06,126 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 00:42:06,127 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-29 00:42:06,127 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:42:06,128 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-29 00:42:06,128 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2023-11-29 00:42:06,136 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 30 [2023-11-29 00:42:06,137 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 57 transitions, 446 flow. Second operand has 14 states, 14 states have (on average 8.714285714285714) internal successors, (122), 14 states have internal predecessors, (122), 0 states have call successors, (0), 0 states 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 00:42:06,137 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 00:42:06,137 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 30 [2023-11-29 00:42:06,137 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 00:42:06,841 INFO L124 PetriNetUnfolderBase]: 843/1693 cut-off events. [2023-11-29 00:42:06,841 INFO L125 PetriNetUnfolderBase]: For 5675/5675 co-relation queries the response was YES. [2023-11-29 00:42:06,845 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6154 conditions, 1693 events. 843/1693 cut-off events. For 5675/5675 co-relation queries the response was YES. Maximal size of possible extension queue 67. Compared 9192 event pairs, 116 based on Foata normal form. 30/1721 useless extension candidates. Maximal degree in co-relation 6132. Up to 537 conditions per place. [2023-11-29 00:42:06,858 INFO L140 encePairwiseOnDemand]: 22/30 looper letters, 104 selfloop transitions, 28 changer transitions 0/135 dead transitions. [2023-11-29 00:42:06,858 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 135 transitions, 1241 flow [2023-11-29 00:42:06,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-29 00:42:06,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-11-29 00:42:06,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 156 transitions. [2023-11-29 00:42:06,860 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4 [2023-11-29 00:42:06,860 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 156 transitions. [2023-11-29 00:42:06,860 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 156 transitions. [2023-11-29 00:42:06,860 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 00:42:06,860 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 156 transitions. [2023-11-29 00:42:06,861 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 12.0) internal successors, (156), 13 states have internal predecessors, (156), 0 states have call successors, (0), 0 states 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 00:42:06,862 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 30.0) internal successors, (420), 14 states have internal predecessors, (420), 0 states have call successors, (0), 0 states 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 00:42:06,863 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 30.0) internal successors, (420), 14 states have internal predecessors, (420), 0 states have call successors, (0), 0 states 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 00:42:06,863 INFO L175 Difference]: Start difference. First operand has 69 places, 57 transitions, 446 flow. Second operand 13 states and 156 transitions. [2023-11-29 00:42:06,863 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 135 transitions, 1241 flow [2023-11-29 00:42:06,877 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 135 transitions, 1149 flow, removed 42 selfloop flow, removed 4 redundant places. [2023-11-29 00:42:06,880 INFO L231 Difference]: Finished difference. Result has 79 places, 66 transitions, 570 flow [2023-11-29 00:42:06,880 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=391, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=570, PETRI_PLACES=79, PETRI_TRANSITIONS=66} [2023-11-29 00:42:06,881 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 49 predicate places. [2023-11-29 00:42:06,881 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 66 transitions, 570 flow [2023-11-29 00:42:06,882 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 8.714285714285714) internal successors, (122), 14 states have internal predecessors, (122), 0 states have call successors, (0), 0 states 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 00:42:06,882 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 00:42:06,882 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:42:06,889 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5de6e5a5-dca5-4d1c-8175-3ad29fb43980/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-11-29 00:42:07,085 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5de6e5a5-dca5-4d1c-8175-3ad29fb43980/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-11-29 00:42:07,085 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 00:42:07,086 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:42:07,086 INFO L85 PathProgramCache]: Analyzing trace with hash -1498512069, now seen corresponding path program 1 times [2023-11-29 00:42:07,086 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:42:07,086 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [751094585] [2023-11-29 00:42:07,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:42:07,086 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:42:07,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:42:08,552 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:42:08,552 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:42:08,552 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [751094585] [2023-11-29 00:42:08,552 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [751094585] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 00:42:08,552 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1687672556] [2023-11-29 00:42:08,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:42:08,552 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:42:08,553 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5de6e5a5-dca5-4d1c-8175-3ad29fb43980/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:42:08,553 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5de6e5a5-dca5-4d1c-8175-3ad29fb43980/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:42:08,556 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5de6e5a5-dca5-4d1c-8175-3ad29fb43980/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-29 00:42:09,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:42:09,074 INFO L262 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 46 conjunts are in the unsatisfiable core [2023-11-29 00:42:09,077 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:42:09,977 INFO L349 Elim1Store]: treesize reduction 7, result has 30.0 percent of original size [2023-11-29 00:42:09,977 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 10 [2023-11-29 00:42:10,322 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:42:10,322 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:42:11,295 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 00:42:11,296 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 34 [2023-11-29 00:42:12,340 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:42:12,340 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1687672556] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 00:42:12,340 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 00:42:12,340 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 17, 17] total 51 [2023-11-29 00:42:12,341 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [404940135] [2023-11-29 00:42:12,341 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 00:42:12,341 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2023-11-29 00:42:12,342 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:42:12,343 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2023-11-29 00:42:12,344 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=218, Invalid=2434, Unknown=0, NotChecked=0, Total=2652 [2023-11-29 00:42:12,383 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 30 [2023-11-29 00:42:12,384 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 66 transitions, 570 flow. Second operand has 52 states, 52 states have (on average 5.5576923076923075) internal successors, (289), 52 states have internal predecessors, (289), 0 states have call successors, (0), 0 states 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 00:42:12,384 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 00:42:12,384 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 30 [2023-11-29 00:42:12,384 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 00:42:18,641 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.53s for a HTC check with result VALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2023-11-29 00:42:29,185 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-29 00:42:32,924 INFO L124 PetriNetUnfolderBase]: 1629/3292 cut-off events. [2023-11-29 00:42:32,924 INFO L125 PetriNetUnfolderBase]: For 13480/13480 co-relation queries the response was YES. [2023-11-29 00:42:32,932 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12215 conditions, 3292 events. 1629/3292 cut-off events. For 13480/13480 co-relation queries the response was YES. Maximal size of possible extension queue 127. Compared 21603 event pairs, 219 based on Foata normal form. 3/3295 useless extension candidates. Maximal degree in co-relation 12191. Up to 1625 conditions per place. [2023-11-29 00:42:32,952 INFO L140 encePairwiseOnDemand]: 14/30 looper letters, 179 selfloop transitions, 164 changer transitions 36/381 dead transitions. [2023-11-29 00:42:32,952 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 139 places, 381 transitions, 3321 flow [2023-11-29 00:42:32,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2023-11-29 00:42:32,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2023-11-29 00:42:32,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 532 transitions. [2023-11-29 00:42:32,956 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2907103825136612 [2023-11-29 00:42:32,956 INFO L72 ComplementDD]: Start complementDD. Operand 61 states and 532 transitions. [2023-11-29 00:42:32,956 INFO L73 IsDeterministic]: Start isDeterministic. Operand 61 states and 532 transitions. [2023-11-29 00:42:32,957 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 00:42:32,957 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 61 states and 532 transitions. [2023-11-29 00:42:32,959 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 62 states, 61 states have (on average 8.721311475409836) internal successors, (532), 61 states have internal predecessors, (532), 0 states have call successors, (0), 0 states 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 00:42:32,963 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 62 states, 62 states have (on average 30.0) internal successors, (1860), 62 states have internal predecessors, (1860), 0 states have call successors, (0), 0 states 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 00:42:32,964 INFO L81 ComplementDD]: Finished complementDD. Result has 62 states, 62 states have (on average 30.0) internal successors, (1860), 62 states have internal predecessors, (1860), 0 states have call successors, (0), 0 states 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 00:42:32,964 INFO L175 Difference]: Start difference. First operand has 79 places, 66 transitions, 570 flow. Second operand 61 states and 532 transitions. [2023-11-29 00:42:32,964 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 139 places, 381 transitions, 3321 flow [2023-11-29 00:42:32,986 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 136 places, 381 transitions, 3216 flow, removed 49 selfloop flow, removed 3 redundant places. [2023-11-29 00:42:32,991 INFO L231 Difference]: Finished difference. Result has 147 places, 227 transitions, 2446 flow [2023-11-29 00:42:32,991 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=535, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=61, PETRI_FLOW=2446, PETRI_PLACES=147, PETRI_TRANSITIONS=227} [2023-11-29 00:42:32,992 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 117 predicate places. [2023-11-29 00:42:32,992 INFO L495 AbstractCegarLoop]: Abstraction has has 147 places, 227 transitions, 2446 flow [2023-11-29 00:42:32,993 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 5.5576923076923075) internal successors, (289), 52 states have internal predecessors, (289), 0 states have call successors, (0), 0 states 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 00:42:32,993 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 00:42:32,993 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:42:32,998 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5de6e5a5-dca5-4d1c-8175-3ad29fb43980/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-11-29 00:42:33,193 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5de6e5a5-dca5-4d1c-8175-3ad29fb43980/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-11-29 00:42:33,194 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 00:42:33,194 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:42:33,194 INFO L85 PathProgramCache]: Analyzing trace with hash -2057288237, now seen corresponding path program 2 times [2023-11-29 00:42:33,194 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:42:33,194 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1567220008] [2023-11-29 00:42:33,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:42:33,194 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:42:33,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:42:34,426 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:42:34,426 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:42:34,427 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1567220008] [2023-11-29 00:42:34,427 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1567220008] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 00:42:34,427 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [523866975] [2023-11-29 00:42:34,427 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 00:42:34,427 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:42:34,427 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5de6e5a5-dca5-4d1c-8175-3ad29fb43980/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:42:34,428 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5de6e5a5-dca5-4d1c-8175-3ad29fb43980/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:42:34,430 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5de6e5a5-dca5-4d1c-8175-3ad29fb43980/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-29 00:42:35,416 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 00:42:35,416 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 00:42:35,418 INFO L262 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 46 conjunts are in the unsatisfiable core [2023-11-29 00:42:35,421 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:42:36,006 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2023-11-29 00:42:36,811 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:42:36,811 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:42:37,907 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 00:42:37,908 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 32 [2023-11-29 00:42:38,808 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:42:38,808 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [523866975] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 00:42:38,809 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 00:42:38,809 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18, 18] total 53 [2023-11-29 00:42:38,809 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1776262816] [2023-11-29 00:42:38,809 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 00:42:38,809 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2023-11-29 00:42:38,810 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:42:38,810 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2023-11-29 00:42:38,811 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=283, Invalid=2579, Unknown=0, NotChecked=0, Total=2862 [2023-11-29 00:42:38,836 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 30 [2023-11-29 00:42:38,836 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 147 places, 227 transitions, 2446 flow. Second operand has 54 states, 54 states have (on average 5.5) internal successors, (297), 54 states have internal predecessors, (297), 0 states have call successors, (0), 0 states 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 00:42:38,836 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 00:42:38,836 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 30 [2023-11-29 00:42:38,837 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 00:42:56,711 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-29 00:43:06,049 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-29 00:43:14,297 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-29 00:43:29,871 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-29 00:43:35,756 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.16s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-29 00:43:50,658 INFO L124 PetriNetUnfolderBase]: 2331/4900 cut-off events. [2023-11-29 00:43:50,659 INFO L125 PetriNetUnfolderBase]: For 25804/25804 co-relation queries the response was YES. [2023-11-29 00:43:50,671 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21183 conditions, 4900 events. 2331/4900 cut-off events. For 25804/25804 co-relation queries the response was YES. Maximal size of possible extension queue 245. Compared 36791 event pairs, 187 based on Foata normal form. 6/4906 useless extension candidates. Maximal degree in co-relation 21148. Up to 1593 conditions per place. [2023-11-29 00:43:50,685 INFO L140 encePairwiseOnDemand]: 13/30 looper letters, 284 selfloop transitions, 303 changer transitions 155/744 dead transitions. [2023-11-29 00:43:50,686 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 237 places, 744 transitions, 7339 flow [2023-11-29 00:43:50,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2023-11-29 00:43:50,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2023-11-29 00:43:50,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 886 transitions. [2023-11-29 00:43:50,690 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.30446735395189 [2023-11-29 00:43:50,690 INFO L72 ComplementDD]: Start complementDD. Operand 97 states and 886 transitions. [2023-11-29 00:43:50,690 INFO L73 IsDeterministic]: Start isDeterministic. Operand 97 states and 886 transitions. [2023-11-29 00:43:50,691 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 00:43:50,691 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 97 states and 886 transitions. [2023-11-29 00:43:50,694 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 98 states, 97 states have (on average 9.1340206185567) internal successors, (886), 97 states have internal predecessors, (886), 0 states have call successors, (0), 0 states 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 00:43:50,700 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 98 states, 98 states have (on average 30.0) internal successors, (2940), 98 states have internal predecessors, (2940), 0 states have call successors, (0), 0 states 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 00:43:50,701 INFO L81 ComplementDD]: Finished complementDD. Result has 98 states, 98 states have (on average 30.0) internal successors, (2940), 98 states have internal predecessors, (2940), 0 states have call successors, (0), 0 states 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 00:43:50,701 INFO L175 Difference]: Start difference. First operand has 147 places, 227 transitions, 2446 flow. Second operand 97 states and 886 transitions. [2023-11-29 00:43:50,701 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 237 places, 744 transitions, 7339 flow [2023-11-29 00:43:50,846 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 230 places, 744 transitions, 6764 flow, removed 282 selfloop flow, removed 7 redundant places. [2023-11-29 00:43:50,859 INFO L231 Difference]: Finished difference. Result has 263 places, 417 transitions, 4959 flow [2023-11-29 00:43:50,860 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=2145, PETRI_DIFFERENCE_MINUEND_PLACES=134, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=227, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=146, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=97, PETRI_FLOW=4959, PETRI_PLACES=263, PETRI_TRANSITIONS=417} [2023-11-29 00:43:50,860 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 233 predicate places. [2023-11-29 00:43:50,860 INFO L495 AbstractCegarLoop]: Abstraction has has 263 places, 417 transitions, 4959 flow [2023-11-29 00:43:50,861 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 54 states have (on average 5.5) internal successors, (297), 54 states have internal predecessors, (297), 0 states have call successors, (0), 0 states 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 00:43:50,861 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 00:43:50,861 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:43:50,877 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5de6e5a5-dca5-4d1c-8175-3ad29fb43980/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-11-29 00:43:51,065 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5de6e5a5-dca5-4d1c-8175-3ad29fb43980/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:43:51,065 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 00:43:51,066 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:43:51,066 INFO L85 PathProgramCache]: Analyzing trace with hash -1715398249, now seen corresponding path program 3 times [2023-11-29 00:43:51,066 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:43:51,066 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [596115199] [2023-11-29 00:43:51,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:43:51,066 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:43:51,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:43:52,399 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:43:52,399 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:43:52,399 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [596115199] [2023-11-29 00:43:52,399 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [596115199] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 00:43:52,399 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [420325319] [2023-11-29 00:43:52,399 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-29 00:43:52,399 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:43:52,399 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5de6e5a5-dca5-4d1c-8175-3ad29fb43980/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:43:52,400 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5de6e5a5-dca5-4d1c-8175-3ad29fb43980/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:43:52,401 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5de6e5a5-dca5-4d1c-8175-3ad29fb43980/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-29 00:43:52,851 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-29 00:43:52,851 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 00:43:52,853 INFO L262 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 50 conjunts are in the unsatisfiable core [2023-11-29 00:43:52,856 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:43:53,843 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 00:43:53,843 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2023-11-29 00:43:54,386 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:43:54,386 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:43:55,541 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 00:43:55,542 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 32 [2023-11-29 00:43:56,705 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:43:56,705 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [420325319] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 00:43:56,705 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 00:43:56,705 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18, 18] total 53 [2023-11-29 00:43:56,705 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [931554899] [2023-11-29 00:43:56,705 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 00:43:56,706 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2023-11-29 00:43:56,706 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:43:56,707 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2023-11-29 00:43:56,708 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=260, Invalid=2602, Unknown=0, NotChecked=0, Total=2862 [2023-11-29 00:43:56,810 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 30 [2023-11-29 00:43:56,810 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 263 places, 417 transitions, 4959 flow. Second operand has 54 states, 54 states have (on average 5.5) internal successors, (297), 54 states have internal predecessors, (297), 0 states have call successors, (0), 0 states 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 00:43:56,810 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 00:43:56,810 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 30 [2023-11-29 00:43:56,810 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 00:44:11,345 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.74s for a HTC check with result VALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-29 00:44:13,648 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.11s for a HTC check with result VALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-29 00:44:20,736 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-29 00:44:28,636 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-29 00:44:39,825 INFO L124 PetriNetUnfolderBase]: 2454/5199 cut-off events. [2023-11-29 00:44:39,826 INFO L125 PetriNetUnfolderBase]: For 40497/40497 co-relation queries the response was YES. [2023-11-29 00:44:39,851 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26398 conditions, 5199 events. 2454/5199 cut-off events. For 40497/40497 co-relation queries the response was YES. Maximal size of possible extension queue 222. Compared 39334 event pairs, 253 based on Foata normal form. 5/5204 useless extension candidates. Maximal degree in co-relation 26333. Up to 2234 conditions per place. [2023-11-29 00:44:39,870 INFO L140 encePairwiseOnDemand]: 13/30 looper letters, 342 selfloop transitions, 450 changer transitions 24/818 dead transitions. [2023-11-29 00:44:39,870 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 333 places, 818 transitions, 9765 flow [2023-11-29 00:44:39,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2023-11-29 00:44:39,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2023-11-29 00:44:39,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 798 transitions. [2023-11-29 00:44:39,873 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2923076923076923 [2023-11-29 00:44:39,873 INFO L72 ComplementDD]: Start complementDD. Operand 91 states and 798 transitions. [2023-11-29 00:44:39,873 INFO L73 IsDeterministic]: Start isDeterministic. Operand 91 states and 798 transitions. [2023-11-29 00:44:39,874 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 00:44:39,874 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 91 states and 798 transitions. [2023-11-29 00:44:39,876 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 92 states, 91 states have (on average 8.76923076923077) internal successors, (798), 91 states have internal predecessors, (798), 0 states have call successors, (0), 0 states 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 00:44:39,881 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 92 states, 92 states have (on average 30.0) internal successors, (2760), 92 states have internal predecessors, (2760), 0 states have call successors, (0), 0 states 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 00:44:39,881 INFO L81 ComplementDD]: Finished complementDD. Result has 92 states, 92 states have (on average 30.0) internal successors, (2760), 92 states have internal predecessors, (2760), 0 states have call successors, (0), 0 states 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 00:44:39,882 INFO L175 Difference]: Start difference. First operand has 263 places, 417 transitions, 4959 flow. Second operand 91 states and 798 transitions. [2023-11-29 00:44:39,882 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 333 places, 818 transitions, 9765 flow [2023-11-29 00:44:40,188 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 315 places, 818 transitions, 9208 flow, removed 239 selfloop flow, removed 18 redundant places. [2023-11-29 00:44:40,199 INFO L231 Difference]: Finished difference. Result has 339 places, 595 transitions, 8166 flow [2023-11-29 00:44:40,200 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=4582, PETRI_DIFFERENCE_MINUEND_PLACES=225, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=417, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=293, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=98, PETRI_DIFFERENCE_SUBTRAHEND_STATES=91, PETRI_FLOW=8166, PETRI_PLACES=339, PETRI_TRANSITIONS=595} [2023-11-29 00:44:40,200 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 309 predicate places. [2023-11-29 00:44:40,200 INFO L495 AbstractCegarLoop]: Abstraction has has 339 places, 595 transitions, 8166 flow [2023-11-29 00:44:40,200 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 54 states have (on average 5.5) internal successors, (297), 54 states have internal predecessors, (297), 0 states have call successors, (0), 0 states 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 00:44:40,200 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 00:44:40,200 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:44:40,206 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5de6e5a5-dca5-4d1c-8175-3ad29fb43980/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-11-29 00:44:40,401 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5de6e5a5-dca5-4d1c-8175-3ad29fb43980/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:44:40,401 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 00:44:40,401 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:44:40,402 INFO L85 PathProgramCache]: Analyzing trace with hash 1675503307, now seen corresponding path program 4 times [2023-11-29 00:44:40,402 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:44:40,402 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [318778136] [2023-11-29 00:44:40,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:44:40,402 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:44:40,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:44:41,543 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:44:41,544 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:44:41,544 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [318778136] [2023-11-29 00:44:41,544 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [318778136] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 00:44:41,544 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [167459352] [2023-11-29 00:44:41,544 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-29 00:44:41,544 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:44:41,544 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5de6e5a5-dca5-4d1c-8175-3ad29fb43980/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:44:41,545 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5de6e5a5-dca5-4d1c-8175-3ad29fb43980/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:44:41,546 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5de6e5a5-dca5-4d1c-8175-3ad29fb43980/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-29 00:44:41,841 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-29 00:44:41,841 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 00:44:41,842 INFO L262 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 39 conjunts are in the unsatisfiable core [2023-11-29 00:44:41,844 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:44:42,504 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 00:44:42,504 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:44:43,181 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 00:44:43,181 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 32 [2023-11-29 00:44:43,672 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-29 00:44:43,672 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [167459352] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 00:44:43,672 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 00:44:43,672 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 14, 13] total 44 [2023-11-29 00:44:43,672 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1514874232] [2023-11-29 00:44:43,672 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 00:44:43,673 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2023-11-29 00:44:43,673 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:44:43,673 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2023-11-29 00:44:43,674 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=1835, Unknown=0, NotChecked=0, Total=1980 [2023-11-29 00:44:43,725 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 30 [2023-11-29 00:44:43,725 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 339 places, 595 transitions, 8166 flow. Second operand has 45 states, 45 states have (on average 5.777777777777778) internal successors, (260), 45 states have internal predecessors, (260), 0 states have call successors, (0), 0 states 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 00:44:43,725 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 00:44:43,726 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 30 [2023-11-29 00:44:43,726 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 00:44:47,856 INFO L124 PetriNetUnfolderBase]: 2541/5328 cut-off events. [2023-11-29 00:44:47,856 INFO L125 PetriNetUnfolderBase]: For 54059/54059 co-relation queries the response was YES. [2023-11-29 00:44:47,880 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30364 conditions, 5328 events. 2541/5328 cut-off events. For 54059/54059 co-relation queries the response was YES. Maximal size of possible extension queue 248. Compared 40359 event pairs, 238 based on Foata normal form. 2/5330 useless extension candidates. Maximal degree in co-relation 30285. Up to 2820 conditions per place. [2023-11-29 00:44:47,905 INFO L140 encePairwiseOnDemand]: 14/30 looper letters, 360 selfloop transitions, 366 changer transitions 6/734 dead transitions. [2023-11-29 00:44:47,905 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 368 places, 734 transitions, 10695 flow [2023-11-29 00:44:47,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2023-11-29 00:44:47,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2023-11-29 00:44:47,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 326 transitions. [2023-11-29 00:44:47,907 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3292929292929293 [2023-11-29 00:44:47,907 INFO L72 ComplementDD]: Start complementDD. Operand 33 states and 326 transitions. [2023-11-29 00:44:47,907 INFO L73 IsDeterministic]: Start isDeterministic. Operand 33 states and 326 transitions. [2023-11-29 00:44:47,908 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 00:44:47,908 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 33 states and 326 transitions. [2023-11-29 00:44:47,909 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 34 states, 33 states have (on average 9.878787878787879) internal successors, (326), 33 states have internal predecessors, (326), 0 states have call successors, (0), 0 states 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 00:44:47,910 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 34 states, 34 states have (on average 30.0) internal successors, (1020), 34 states have internal predecessors, (1020), 0 states have call successors, (0), 0 states 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 00:44:47,911 INFO L81 ComplementDD]: Finished complementDD. Result has 34 states, 34 states have (on average 30.0) internal successors, (1020), 34 states have internal predecessors, (1020), 0 states have call successors, (0), 0 states 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 00:44:47,911 INFO L175 Difference]: Start difference. First operand has 339 places, 595 transitions, 8166 flow. Second operand 33 states and 326 transitions. [2023-11-29 00:44:47,911 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 368 places, 734 transitions, 10695 flow [2023-11-29 00:44:48,395 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 337 places, 734 transitions, 10256 flow, removed 136 selfloop flow, removed 31 redundant places. [2023-11-29 00:44:48,407 INFO L231 Difference]: Finished difference. Result has 341 places, 629 transitions, 9447 flow [2023-11-29 00:44:48,408 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=7741, PETRI_DIFFERENCE_MINUEND_PLACES=305, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=595, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=337, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=250, PETRI_DIFFERENCE_SUBTRAHEND_STATES=33, PETRI_FLOW=9447, PETRI_PLACES=341, PETRI_TRANSITIONS=629} [2023-11-29 00:44:48,408 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 311 predicate places. [2023-11-29 00:44:48,408 INFO L495 AbstractCegarLoop]: Abstraction has has 341 places, 629 transitions, 9447 flow [2023-11-29 00:44:48,408 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 5.777777777777778) internal successors, (260), 45 states have internal predecessors, (260), 0 states have call successors, (0), 0 states 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 00:44:48,409 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 00:44:48,409 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:44:48,414 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5de6e5a5-dca5-4d1c-8175-3ad29fb43980/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2023-11-29 00:44:48,609 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5de6e5a5-dca5-4d1c-8175-3ad29fb43980/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2023-11-29 00:44:48,609 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 00:44:48,610 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:44:48,610 INFO L85 PathProgramCache]: Analyzing trace with hash -1236230305, now seen corresponding path program 5 times [2023-11-29 00:44:48,610 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:44:48,610 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [797489572] [2023-11-29 00:44:48,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:44:48,610 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:44:48,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:44:49,800 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:44:49,801 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:44:49,801 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [797489572] [2023-11-29 00:44:49,801 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [797489572] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 00:44:49,801 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1064038035] [2023-11-29 00:44:49,801 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-29 00:44:49,801 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:44:49,801 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5de6e5a5-dca5-4d1c-8175-3ad29fb43980/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:44:49,802 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5de6e5a5-dca5-4d1c-8175-3ad29fb43980/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:44:49,808 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5de6e5a5-dca5-4d1c-8175-3ad29fb43980/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-29 00:44:50,202 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 00:44:50,203 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 00:44:50,204 INFO L262 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 39 conjunts are in the unsatisfiable core [2023-11-29 00:44:50,206 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:44:53,279 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 00:44:53,279 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:44:54,089 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 00:44:54,089 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 32 [2023-11-29 00:44:54,583 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-29 00:44:54,583 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1064038035] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 00:44:54,583 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 00:44:54,583 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 14, 13] total 44 [2023-11-29 00:44:54,584 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [878133846] [2023-11-29 00:44:54,584 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 00:44:54,584 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2023-11-29 00:44:54,584 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:44:54,585 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2023-11-29 00:44:54,585 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=1843, Unknown=0, NotChecked=0, Total=1980 [2023-11-29 00:44:54,706 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 30 [2023-11-29 00:44:54,707 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 341 places, 629 transitions, 9447 flow. Second operand has 45 states, 45 states have (on average 5.777777777777778) internal successors, (260), 45 states have internal predecessors, (260), 0 states have call successors, (0), 0 states 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 00:44:54,707 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 00:44:54,707 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 30 [2023-11-29 00:44:54,707 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 00:44:59,399 INFO L124 PetriNetUnfolderBase]: 2586/5512 cut-off events. [2023-11-29 00:44:59,399 INFO L125 PetriNetUnfolderBase]: For 71097/71097 co-relation queries the response was YES. [2023-11-29 00:44:59,423 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33439 conditions, 5512 events. 2586/5512 cut-off events. For 71097/71097 co-relation queries the response was YES. Maximal size of possible extension queue 257. Compared 42566 event pairs, 383 based on Foata normal form. 2/5513 useless extension candidates. Maximal degree in co-relation 33364. Up to 3035 conditions per place. [2023-11-29 00:44:59,441 INFO L140 encePairwiseOnDemand]: 14/30 looper letters, 372 selfloop transitions, 363 changer transitions 6/743 dead transitions. [2023-11-29 00:44:59,441 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 373 places, 743 transitions, 11775 flow [2023-11-29 00:44:59,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2023-11-29 00:44:59,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2023-11-29 00:44:59,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 326 transitions. [2023-11-29 00:44:59,443 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3196078431372549 [2023-11-29 00:44:59,443 INFO L72 ComplementDD]: Start complementDD. Operand 34 states and 326 transitions. [2023-11-29 00:44:59,443 INFO L73 IsDeterministic]: Start isDeterministic. Operand 34 states and 326 transitions. [2023-11-29 00:44:59,444 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 00:44:59,444 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 34 states and 326 transitions. [2023-11-29 00:44:59,445 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 35 states, 34 states have (on average 9.588235294117647) internal successors, (326), 34 states have internal predecessors, (326), 0 states have call successors, (0), 0 states 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 00:44:59,446 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 35 states, 35 states have (on average 30.0) internal successors, (1050), 35 states have internal predecessors, (1050), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:44:59,447 INFO L81 ComplementDD]: Finished complementDD. Result has 35 states, 35 states have (on average 30.0) internal successors, (1050), 35 states have internal predecessors, (1050), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:44:59,447 INFO L175 Difference]: Start difference. First operand has 341 places, 629 transitions, 9447 flow. Second operand 34 states and 326 transitions. [2023-11-29 00:44:59,447 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 373 places, 743 transitions, 11775 flow [2023-11-29 00:45:00,026 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 357 places, 743 transitions, 11472 flow, removed 73 selfloop flow, removed 16 redundant places. [2023-11-29 00:45:00,038 INFO L231 Difference]: Finished difference. Result has 363 places, 645 transitions, 10665 flow [2023-11-29 00:45:00,039 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=9166, PETRI_DIFFERENCE_MINUEND_PLACES=324, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=629, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=349, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=273, PETRI_DIFFERENCE_SUBTRAHEND_STATES=34, PETRI_FLOW=10665, PETRI_PLACES=363, PETRI_TRANSITIONS=645} [2023-11-29 00:45:00,039 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 333 predicate places. [2023-11-29 00:45:00,039 INFO L495 AbstractCegarLoop]: Abstraction has has 363 places, 645 transitions, 10665 flow [2023-11-29 00:45:00,040 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 5.777777777777778) internal successors, (260), 45 states have internal predecessors, (260), 0 states have call successors, (0), 0 states 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 00:45:00,040 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 00:45:00,040 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:45:00,044 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5de6e5a5-dca5-4d1c-8175-3ad29fb43980/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2023-11-29 00:45:00,240 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5de6e5a5-dca5-4d1c-8175-3ad29fb43980/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2023-11-29 00:45:00,240 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 00:45:00,241 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:45:00,241 INFO L85 PathProgramCache]: Analyzing trace with hash 414510111, now seen corresponding path program 6 times [2023-11-29 00:45:00,241 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:45:00,241 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1966864365] [2023-11-29 00:45:00,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:45:00,241 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:45:00,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:45:01,308 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:45:01,308 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:45:01,308 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1966864365] [2023-11-29 00:45:01,308 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1966864365] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 00:45:01,308 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [120365193] [2023-11-29 00:45:01,308 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-29 00:45:01,309 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:45:01,309 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5de6e5a5-dca5-4d1c-8175-3ad29fb43980/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:45:01,309 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5de6e5a5-dca5-4d1c-8175-3ad29fb43980/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:45:01,310 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5de6e5a5-dca5-4d1c-8175-3ad29fb43980/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-29 00:45:01,594 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-11-29 00:45:01,594 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 00:45:01,596 INFO L262 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 48 conjunts are in the unsatisfiable core [2023-11-29 00:45:01,598 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:45:02,111 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 3 [2023-11-29 00:45:02,697 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:45:02,697 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:45:03,875 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 00:45:03,875 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 24 [2023-11-29 00:45:04,492 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:45:04,492 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [120365193] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 00:45:04,492 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 00:45:04,492 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18, 17] total 52 [2023-11-29 00:45:04,492 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [410117002] [2023-11-29 00:45:04,492 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 00:45:04,493 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2023-11-29 00:45:04,493 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:45:04,493 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2023-11-29 00:45:04,495 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=277, Invalid=2479, Unknown=0, NotChecked=0, Total=2756 [2023-11-29 00:45:04,587 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 30 [2023-11-29 00:45:04,587 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 363 places, 645 transitions, 10665 flow. Second operand has 53 states, 53 states have (on average 5.528301886792453) internal successors, (293), 53 states have internal predecessors, (293), 0 states have call successors, (0), 0 states 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 00:45:04,587 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 00:45:04,587 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 30 [2023-11-29 00:45:04,587 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 00:45:20,919 INFO L124 PetriNetUnfolderBase]: 2761/5928 cut-off events. [2023-11-29 00:45:20,919 INFO L125 PetriNetUnfolderBase]: For 96979/96979 co-relation queries the response was YES. [2023-11-29 00:45:20,948 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38376 conditions, 5928 events. 2761/5928 cut-off events. For 96979/96979 co-relation queries the response was YES. Maximal size of possible extension queue 264. Compared 46601 event pairs, 329 based on Foata normal form. 6/5933 useless extension candidates. Maximal degree in co-relation 38296. Up to 2059 conditions per place. [2023-11-29 00:45:20,968 INFO L140 encePairwiseOnDemand]: 13/30 looper letters, 387 selfloop transitions, 467 changer transitions 50/906 dead transitions. [2023-11-29 00:45:20,968 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 439 places, 906 transitions, 14585 flow [2023-11-29 00:45:20,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2023-11-29 00:45:20,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2023-11-29 00:45:20,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 708 transitions. [2023-11-29 00:45:20,970 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.30256410256410254 [2023-11-29 00:45:20,970 INFO L72 ComplementDD]: Start complementDD. Operand 78 states and 708 transitions. [2023-11-29 00:45:20,970 INFO L73 IsDeterministic]: Start isDeterministic. Operand 78 states and 708 transitions. [2023-11-29 00:45:20,971 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 00:45:20,971 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 78 states and 708 transitions. [2023-11-29 00:45:20,972 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 79 states, 78 states have (on average 9.076923076923077) internal successors, (708), 78 states have internal predecessors, (708), 0 states have call successors, (0), 0 states 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 00:45:20,974 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 79 states, 79 states have (on average 30.0) internal successors, (2370), 79 states have internal predecessors, (2370), 0 states have call successors, (0), 0 states 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 00:45:20,975 INFO L81 ComplementDD]: Finished complementDD. Result has 79 states, 79 states have (on average 30.0) internal successors, (2370), 79 states have internal predecessors, (2370), 0 states have call successors, (0), 0 states 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 00:45:20,975 INFO L175 Difference]: Start difference. First operand has 363 places, 645 transitions, 10665 flow. Second operand 78 states and 708 transitions. [2023-11-29 00:45:20,975 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 439 places, 906 transitions, 14585 flow [2023-11-29 00:45:21,658 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 420 places, 906 transitions, 14288 flow, removed 40 selfloop flow, removed 19 redundant places. [2023-11-29 00:45:21,676 INFO L231 Difference]: Finished difference. Result has 433 places, 687 transitions, 12250 flow [2023-11-29 00:45:21,676 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=10382, PETRI_DIFFERENCE_MINUEND_PLACES=343, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=645, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=427, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=205, PETRI_DIFFERENCE_SUBTRAHEND_STATES=78, PETRI_FLOW=12250, PETRI_PLACES=433, PETRI_TRANSITIONS=687} [2023-11-29 00:45:21,677 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 403 predicate places. [2023-11-29 00:45:21,677 INFO L495 AbstractCegarLoop]: Abstraction has has 433 places, 687 transitions, 12250 flow [2023-11-29 00:45:21,677 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 5.528301886792453) internal successors, (293), 53 states have internal predecessors, (293), 0 states have call successors, (0), 0 states 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 00:45:21,677 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 00:45:21,677 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:45:21,682 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5de6e5a5-dca5-4d1c-8175-3ad29fb43980/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2023-11-29 00:45:21,877 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5de6e5a5-dca5-4d1c-8175-3ad29fb43980/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:45:21,878 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 00:45:21,878 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:45:21,878 INFO L85 PathProgramCache]: Analyzing trace with hash 1739366363, now seen corresponding path program 7 times [2023-11-29 00:45:21,878 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:45:21,878 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1796589631] [2023-11-29 00:45:21,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:45:21,878 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:45:21,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:45:22,987 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:45:22,987 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:45:22,987 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1796589631] [2023-11-29 00:45:22,987 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1796589631] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 00:45:22,987 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1344626426] [2023-11-29 00:45:22,988 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-29 00:45:22,988 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:45:22,988 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5de6e5a5-dca5-4d1c-8175-3ad29fb43980/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:45:22,989 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5de6e5a5-dca5-4d1c-8175-3ad29fb43980/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:45:22,989 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5de6e5a5-dca5-4d1c-8175-3ad29fb43980/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-29 00:45:23,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:45:23,078 INFO L262 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 46 conjunts are in the unsatisfiable core [2023-11-29 00:45:23,081 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:45:23,693 INFO L349 Elim1Store]: treesize reduction 7, result has 30.0 percent of original size [2023-11-29 00:45:23,693 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 10 [2023-11-29 00:45:24,117 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:45:24,117 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:45:25,051 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 00:45:25,051 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 51 treesize of output 43 [2023-11-29 00:45:25,899 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:45:25,899 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1344626426] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 00:45:25,899 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 00:45:25,899 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17, 16] total 49 [2023-11-29 00:45:25,900 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1105011777] [2023-11-29 00:45:25,900 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 00:45:25,900 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2023-11-29 00:45:25,900 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:45:25,901 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2023-11-29 00:45:25,902 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=207, Invalid=2243, Unknown=0, NotChecked=0, Total=2450 [2023-11-29 00:45:25,927 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 30 [2023-11-29 00:45:25,927 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 433 places, 687 transitions, 12250 flow. Second operand has 50 states, 50 states have (on average 5.62) internal successors, (281), 50 states have internal predecessors, (281), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:45:25,927 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 00:45:25,927 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 30 [2023-11-29 00:45:25,927 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 00:45:36,647 INFO L124 PetriNetUnfolderBase]: 2896/6154 cut-off events. [2023-11-29 00:45:36,647 INFO L125 PetriNetUnfolderBase]: For 117324/117324 co-relation queries the response was YES. [2023-11-29 00:45:36,678 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42732 conditions, 6154 events. 2896/6154 cut-off events. For 117324/117324 co-relation queries the response was YES. Maximal size of possible extension queue 298. Compared 48449 event pairs, 281 based on Foata normal form. 5/6158 useless extension candidates. Maximal degree in co-relation 42639. Up to 3051 conditions per place. [2023-11-29 00:45:36,698 INFO L140 encePairwiseOnDemand]: 14/30 looper letters, 346 selfloop transitions, 575 changer transitions 39/962 dead transitions. [2023-11-29 00:45:36,699 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 491 places, 962 transitions, 17320 flow [2023-11-29 00:45:36,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2023-11-29 00:45:36,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2023-11-29 00:45:36,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 578 transitions. [2023-11-29 00:45:36,700 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2964102564102564 [2023-11-29 00:45:36,700 INFO L72 ComplementDD]: Start complementDD. Operand 65 states and 578 transitions. [2023-11-29 00:45:36,700 INFO L73 IsDeterministic]: Start isDeterministic. Operand 65 states and 578 transitions. [2023-11-29 00:45:36,701 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 00:45:36,701 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 65 states and 578 transitions. [2023-11-29 00:45:36,702 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 66 states, 65 states have (on average 8.892307692307693) internal successors, (578), 65 states have internal predecessors, (578), 0 states have call successors, (0), 0 states 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 00:45:36,704 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 66 states, 66 states have (on average 30.0) internal successors, (1980), 66 states have internal predecessors, (1980), 0 states have call successors, (0), 0 states 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 00:45:36,704 INFO L81 ComplementDD]: Finished complementDD. Result has 66 states, 66 states have (on average 30.0) internal successors, (1980), 66 states have internal predecessors, (1980), 0 states have call successors, (0), 0 states 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 00:45:36,704 INFO L175 Difference]: Start difference. First operand has 433 places, 687 transitions, 12250 flow. Second operand 65 states and 578 transitions. [2023-11-29 00:45:36,704 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 491 places, 962 transitions, 17320 flow [2023-11-29 00:45:37,612 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 443 places, 962 transitions, 16592 flow, removed 119 selfloop flow, removed 48 redundant places. [2023-11-29 00:45:37,640 INFO L231 Difference]: Finished difference. Result has 458 places, 803 transitions, 15753 flow [2023-11-29 00:45:37,641 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=11651, PETRI_DIFFERENCE_MINUEND_PLACES=379, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=685, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=460, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=198, PETRI_DIFFERENCE_SUBTRAHEND_STATES=65, PETRI_FLOW=15753, PETRI_PLACES=458, PETRI_TRANSITIONS=803} [2023-11-29 00:45:37,642 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 428 predicate places. [2023-11-29 00:45:37,642 INFO L495 AbstractCegarLoop]: Abstraction has has 458 places, 803 transitions, 15753 flow [2023-11-29 00:45:37,642 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 5.62) internal successors, (281), 50 states have internal predecessors, (281), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:45:37,642 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 00:45:37,643 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:45:37,647 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5de6e5a5-dca5-4d1c-8175-3ad29fb43980/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2023-11-29 00:45:37,843 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5de6e5a5-dca5-4d1c-8175-3ad29fb43980/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:45:37,843 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 00:45:37,844 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:45:37,844 INFO L85 PathProgramCache]: Analyzing trace with hash 848965663, now seen corresponding path program 8 times [2023-11-29 00:45:37,844 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:45:37,844 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1709086378] [2023-11-29 00:45:37,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:45:37,844 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:45:37,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:45:38,926 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:45:38,926 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:45:38,926 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1709086378] [2023-11-29 00:45:38,926 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1709086378] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 00:45:38,926 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [316625414] [2023-11-29 00:45:38,926 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 00:45:38,926 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:45:38,927 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5de6e5a5-dca5-4d1c-8175-3ad29fb43980/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:45:38,927 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5de6e5a5-dca5-4d1c-8175-3ad29fb43980/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:45:38,929 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5de6e5a5-dca5-4d1c-8175-3ad29fb43980/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-11-29 00:45:39,036 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 00:45:39,037 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 00:45:39,038 INFO L262 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 39 conjunts are in the unsatisfiable core [2023-11-29 00:45:39,040 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:45:39,951 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 00:45:39,952 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:45:40,617 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 00:45:40,618 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 51 treesize of output 43 [2023-11-29 00:45:40,902 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-29 00:45:40,903 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [316625414] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 00:45:40,903 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 00:45:40,903 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 14, 12] total 43 [2023-11-29 00:45:40,903 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1419166928] [2023-11-29 00:45:40,903 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 00:45:40,903 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2023-11-29 00:45:40,904 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:45:40,904 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2023-11-29 00:45:40,905 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=1734, Unknown=0, NotChecked=0, Total=1892 [2023-11-29 00:45:40,929 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 30 [2023-11-29 00:45:40,929 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 458 places, 803 transitions, 15753 flow. Second operand has 44 states, 44 states have (on average 5.818181818181818) internal successors, (256), 44 states have internal predecessors, (256), 0 states have call successors, (0), 0 states 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 00:45:40,929 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 00:45:40,929 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 30 [2023-11-29 00:45:40,929 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 00:45:45,002 INFO L124 PetriNetUnfolderBase]: 2953/6322 cut-off events. [2023-11-29 00:45:45,002 INFO L125 PetriNetUnfolderBase]: For 159969/159969 co-relation queries the response was YES. [2023-11-29 00:45:45,040 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48298 conditions, 6322 events. 2953/6322 cut-off events. For 159969/159969 co-relation queries the response was YES. Maximal size of possible extension queue 334. Compared 50592 event pairs, 385 based on Foata normal form. 4/6325 useless extension candidates. Maximal degree in co-relation 48194. Up to 3441 conditions per place. [2023-11-29 00:45:45,063 INFO L140 encePairwiseOnDemand]: 14/30 looper letters, 435 selfloop transitions, 435 changer transitions 43/915 dead transitions. [2023-11-29 00:45:45,063 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 483 places, 915 transitions, 18786 flow [2023-11-29 00:45:45,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2023-11-29 00:45:45,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2023-11-29 00:45:45,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 328 transitions. [2023-11-29 00:45:45,064 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3215686274509804 [2023-11-29 00:45:45,064 INFO L72 ComplementDD]: Start complementDD. Operand 34 states and 328 transitions. [2023-11-29 00:45:45,064 INFO L73 IsDeterministic]: Start isDeterministic. Operand 34 states and 328 transitions. [2023-11-29 00:45:45,064 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 00:45:45,064 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 34 states and 328 transitions. [2023-11-29 00:45:45,065 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 35 states, 34 states have (on average 9.647058823529411) internal successors, (328), 34 states have internal predecessors, (328), 0 states have call successors, (0), 0 states 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 00:45:45,066 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 35 states, 35 states have (on average 30.0) internal successors, (1050), 35 states have internal predecessors, (1050), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:45:45,066 INFO L81 ComplementDD]: Finished complementDD. Result has 35 states, 35 states have (on average 30.0) internal successors, (1050), 35 states have internal predecessors, (1050), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:45:45,066 INFO L175 Difference]: Start difference. First operand has 458 places, 803 transitions, 15753 flow. Second operand 34 states and 328 transitions. [2023-11-29 00:45:45,066 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 483 places, 915 transitions, 18786 flow [2023-11-29 00:45:46,242 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 456 places, 915 transitions, 18223 flow, removed 182 selfloop flow, removed 27 redundant places. [2023-11-29 00:45:46,260 INFO L231 Difference]: Finished difference. Result has 464 places, 797 transitions, 16717 flow [2023-11-29 00:45:46,260 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=15208, PETRI_DIFFERENCE_MINUEND_PLACES=423, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=803, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=422, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=376, PETRI_DIFFERENCE_SUBTRAHEND_STATES=34, PETRI_FLOW=16717, PETRI_PLACES=464, PETRI_TRANSITIONS=797} [2023-11-29 00:45:46,261 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 434 predicate places. [2023-11-29 00:45:46,261 INFO L495 AbstractCegarLoop]: Abstraction has has 464 places, 797 transitions, 16717 flow [2023-11-29 00:45:46,261 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 5.818181818181818) internal successors, (256), 44 states have internal predecessors, (256), 0 states have call successors, (0), 0 states 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 00:45:46,261 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 00:45:46,261 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:45:46,266 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5de6e5a5-dca5-4d1c-8175-3ad29fb43980/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-11-29 00:45:46,461 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5de6e5a5-dca5-4d1c-8175-3ad29fb43980/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2023-11-29 00:45:46,462 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 00:45:46,462 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:45:46,462 INFO L85 PathProgramCache]: Analyzing trace with hash 1283768565, now seen corresponding path program 9 times [2023-11-29 00:45:46,462 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:45:46,462 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [350191581] [2023-11-29 00:45:46,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:45:46,462 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:45:46,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:45:47,476 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:45:47,477 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:45:47,477 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [350191581] [2023-11-29 00:45:47,477 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [350191581] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 00:45:47,477 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2078997409] [2023-11-29 00:45:47,477 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-29 00:45:47,477 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:45:47,477 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5de6e5a5-dca5-4d1c-8175-3ad29fb43980/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:45:47,478 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5de6e5a5-dca5-4d1c-8175-3ad29fb43980/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:45:47,479 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5de6e5a5-dca5-4d1c-8175-3ad29fb43980/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-11-29 00:45:47,847 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-29 00:45:47,848 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 00:45:47,849 INFO L262 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 39 conjunts are in the unsatisfiable core [2023-11-29 00:45:47,850 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:45:52,460 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 00:45:52,461 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:45:53,252 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 00:45:53,252 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 24 [2023-11-29 00:45:53,467 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-29 00:45:53,467 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2078997409] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 00:45:53,467 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 00:45:53,467 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 14, 12] total 43 [2023-11-29 00:45:53,468 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1566704325] [2023-11-29 00:45:53,468 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 00:45:53,468 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2023-11-29 00:45:53,468 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:45:53,469 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2023-11-29 00:45:53,469 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=160, Invalid=1732, Unknown=0, NotChecked=0, Total=1892 [2023-11-29 00:45:53,508 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 30 [2023-11-29 00:45:53,508 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 464 places, 797 transitions, 16717 flow. Second operand has 44 states, 44 states have (on average 5.818181818181818) internal successors, (256), 44 states have internal predecessors, (256), 0 states have call successors, (0), 0 states 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 00:45:53,508 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 00:45:53,508 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 30 [2023-11-29 00:45:53,509 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 00:45:58,086 INFO L124 PetriNetUnfolderBase]: 3045/6547 cut-off events. [2023-11-29 00:45:58,086 INFO L125 PetriNetUnfolderBase]: For 192204/192204 co-relation queries the response was YES. [2023-11-29 00:45:58,127 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52411 conditions, 6547 events. 3045/6547 cut-off events. For 192204/192204 co-relation queries the response was YES. Maximal size of possible extension queue 349. Compared 53108 event pairs, 397 based on Foata normal form. 5/6551 useless extension candidates. Maximal degree in co-relation 52307. Up to 3638 conditions per place. [2023-11-29 00:45:58,151 INFO L140 encePairwiseOnDemand]: 14/30 looper letters, 465 selfloop transitions, 449 changer transitions 36/952 dead transitions. [2023-11-29 00:45:58,151 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 487 places, 952 transitions, 20731 flow [2023-11-29 00:45:58,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2023-11-29 00:45:58,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2023-11-29 00:45:58,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 357 transitions. [2023-11-29 00:45:58,152 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3216216216216216 [2023-11-29 00:45:58,152 INFO L72 ComplementDD]: Start complementDD. Operand 37 states and 357 transitions. [2023-11-29 00:45:58,152 INFO L73 IsDeterministic]: Start isDeterministic. Operand 37 states and 357 transitions. [2023-11-29 00:45:58,153 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 00:45:58,153 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 37 states and 357 transitions. [2023-11-29 00:45:58,153 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 38 states, 37 states have (on average 9.64864864864865) internal successors, (357), 37 states have internal predecessors, (357), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:45:58,154 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 38 states, 38 states have (on average 30.0) internal successors, (1140), 38 states have internal predecessors, (1140), 0 states have call successors, (0), 0 states 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 00:45:58,154 INFO L81 ComplementDD]: Finished complementDD. Result has 38 states, 38 states have (on average 30.0) internal successors, (1140), 38 states have internal predecessors, (1140), 0 states have call successors, (0), 0 states 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 00:45:58,154 INFO L175 Difference]: Start difference. First operand has 464 places, 797 transitions, 16717 flow. Second operand 37 states and 357 transitions. [2023-11-29 00:45:58,155 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 487 places, 952 transitions, 20731 flow [2023-11-29 00:45:59,469 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 460 places, 952 transitions, 20398 flow, removed 36 selfloop flow, removed 27 redundant places. [2023-11-29 00:45:59,488 INFO L231 Difference]: Finished difference. Result has 471 places, 826 transitions, 18759 flow [2023-11-29 00:45:59,489 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=16405, PETRI_DIFFERENCE_MINUEND_PLACES=424, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=797, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=421, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=365, PETRI_DIFFERENCE_SUBTRAHEND_STATES=37, PETRI_FLOW=18759, PETRI_PLACES=471, PETRI_TRANSITIONS=826} [2023-11-29 00:45:59,489 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 441 predicate places. [2023-11-29 00:45:59,490 INFO L495 AbstractCegarLoop]: Abstraction has has 471 places, 826 transitions, 18759 flow [2023-11-29 00:45:59,490 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 5.818181818181818) internal successors, (256), 44 states have internal predecessors, (256), 0 states have call successors, (0), 0 states 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 00:45:59,490 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 00:45:59,490 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:45:59,494 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5de6e5a5-dca5-4d1c-8175-3ad29fb43980/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2023-11-29 00:45:59,690 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5de6e5a5-dca5-4d1c-8175-3ad29fb43980/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2023-11-29 00:45:59,690 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 00:45:59,691 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:45:59,691 INFO L85 PathProgramCache]: Analyzing trace with hash -132814245, now seen corresponding path program 10 times [2023-11-29 00:45:59,691 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:45:59,691 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [946725531] [2023-11-29 00:45:59,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:45:59,691 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:45:59,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:46:00,667 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:46:00,668 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:46:00,668 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [946725531] [2023-11-29 00:46:00,668 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [946725531] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 00:46:00,668 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2127048343] [2023-11-29 00:46:00,668 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-29 00:46:00,668 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:46:00,668 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5de6e5a5-dca5-4d1c-8175-3ad29fb43980/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:46:00,669 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5de6e5a5-dca5-4d1c-8175-3ad29fb43980/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:46:00,670 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5de6e5a5-dca5-4d1c-8175-3ad29fb43980/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-11-29 00:46:01,105 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-29 00:46:01,105 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 00:46:01,107 INFO L262 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 47 conjunts are in the unsatisfiable core [2023-11-29 00:46:01,109 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:46:01,610 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 3 [2023-11-29 00:46:02,215 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:46:02,215 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:46:03,207 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 00:46:03,208 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 51 treesize of output 43 [2023-11-29 00:46:03,977 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:46:03,978 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2127048343] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 00:46:03,978 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 00:46:03,978 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 17, 16] total 50 [2023-11-29 00:46:03,978 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1495003836] [2023-11-29 00:46:03,978 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 00:46:03,978 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2023-11-29 00:46:03,979 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:46:03,979 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2023-11-29 00:46:03,980 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=273, Invalid=2277, Unknown=0, NotChecked=0, Total=2550 [2023-11-29 00:46:04,015 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 30 [2023-11-29 00:46:04,016 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 471 places, 826 transitions, 18759 flow. Second operand has 51 states, 51 states have (on average 5.588235294117647) internal successors, (285), 51 states have internal predecessors, (285), 0 states have call successors, (0), 0 states 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 00:46:04,016 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 00:46:04,016 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 30 [2023-11-29 00:46:04,016 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 00:46:25,262 INFO L124 PetriNetUnfolderBase]: 4089/8698 cut-off events. [2023-11-29 00:46:25,262 INFO L125 PetriNetUnfolderBase]: For 291028/291028 co-relation queries the response was YES. [2023-11-29 00:46:25,317 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74098 conditions, 8698 events. 4089/8698 cut-off events. For 291028/291028 co-relation queries the response was YES. Maximal size of possible extension queue 449. Compared 74320 event pairs, 336 based on Foata normal form. 25/8722 useless extension candidates. Maximal degree in co-relation 73986. Up to 3005 conditions per place. [2023-11-29 00:46:25,350 INFO L140 encePairwiseOnDemand]: 13/30 looper letters, 626 selfloop transitions, 859 changer transitions 117/1604 dead transitions. [2023-11-29 00:46:25,350 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 591 places, 1604 transitions, 33989 flow [2023-11-29 00:46:25,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 124 states. [2023-11-29 00:46:25,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2023-11-29 00:46:25,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 1172 transitions. [2023-11-29 00:46:25,352 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3150537634408602 [2023-11-29 00:46:25,352 INFO L72 ComplementDD]: Start complementDD. Operand 124 states and 1172 transitions. [2023-11-29 00:46:25,352 INFO L73 IsDeterministic]: Start isDeterministic. Operand 124 states and 1172 transitions. [2023-11-29 00:46:25,353 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 00:46:25,353 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 124 states and 1172 transitions. [2023-11-29 00:46:25,354 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 125 states, 124 states have (on average 9.451612903225806) internal successors, (1172), 124 states have internal predecessors, (1172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:46:25,358 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 125 states, 125 states have (on average 30.0) internal successors, (3750), 125 states have internal predecessors, (3750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:46:25,358 INFO L81 ComplementDD]: Finished complementDD. Result has 125 states, 125 states have (on average 30.0) internal successors, (3750), 125 states have internal predecessors, (3750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:46:25,358 INFO L175 Difference]: Start difference. First operand has 471 places, 826 transitions, 18759 flow. Second operand 124 states and 1172 transitions. [2023-11-29 00:46:25,358 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 591 places, 1604 transitions, 33989 flow [2023-11-29 00:46:27,580 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 566 places, 1604 transitions, 33434 flow, removed 52 selfloop flow, removed 25 redundant places. [2023-11-29 00:46:27,609 INFO L231 Difference]: Finished difference. Result has 600 places, 1190 transitions, 29070 flow [2023-11-29 00:46:27,610 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=18330, PETRI_DIFFERENCE_MINUEND_PLACES=443, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=821, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=543, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=256, PETRI_DIFFERENCE_SUBTRAHEND_STATES=124, PETRI_FLOW=29070, PETRI_PLACES=600, PETRI_TRANSITIONS=1190} [2023-11-29 00:46:27,610 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 570 predicate places. [2023-11-29 00:46:27,610 INFO L495 AbstractCegarLoop]: Abstraction has has 600 places, 1190 transitions, 29070 flow [2023-11-29 00:46:27,610 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 5.588235294117647) internal successors, (285), 51 states have internal predecessors, (285), 0 states have call successors, (0), 0 states 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 00:46:27,610 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 00:46:27,610 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:46:27,614 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5de6e5a5-dca5-4d1c-8175-3ad29fb43980/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2023-11-29 00:46:27,810 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5de6e5a5-dca5-4d1c-8175-3ad29fb43980/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2023-11-29 00:46:27,811 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 00:46:27,811 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:46:27,811 INFO L85 PathProgramCache]: Analyzing trace with hash -1450901221, now seen corresponding path program 11 times [2023-11-29 00:46:27,811 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:46:27,811 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1870926012] [2023-11-29 00:46:27,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:46:27,811 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:46:27,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:46:28,783 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:46:28,783 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:46:28,783 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1870926012] [2023-11-29 00:46:28,783 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1870926012] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 00:46:28,783 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1581671502] [2023-11-29 00:46:28,783 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-29 00:46:28,784 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:46:28,784 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5de6e5a5-dca5-4d1c-8175-3ad29fb43980/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:46:28,784 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5de6e5a5-dca5-4d1c-8175-3ad29fb43980/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:46:28,785 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5de6e5a5-dca5-4d1c-8175-3ad29fb43980/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-11-29 00:46:29,116 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 00:46:29,116 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 00:46:29,117 INFO L262 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 44 conjunts are in the unsatisfiable core [2023-11-29 00:46:29,119 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:46:29,716 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-11-29 00:46:29,716 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 10 [2023-11-29 00:46:30,098 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:46:30,098 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:46:31,390 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 00:46:31,390 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 43 treesize of output 27 [2023-11-29 00:46:32,077 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:46:32,077 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1581671502] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 00:46:32,077 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 00:46:32,077 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18, 17] total 52 [2023-11-29 00:46:32,077 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [613078107] [2023-11-29 00:46:32,077 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 00:46:32,078 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2023-11-29 00:46:32,078 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:46:32,078 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2023-11-29 00:46:32,080 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=2520, Unknown=0, NotChecked=0, Total=2756 [2023-11-29 00:46:32,089 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 30 [2023-11-29 00:46:32,089 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 600 places, 1190 transitions, 29070 flow. Second operand has 53 states, 53 states have (on average 5.528301886792453) internal successors, (293), 53 states have internal predecessors, (293), 0 states have call successors, (0), 0 states 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 00:46:32,089 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 00:46:32,089 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 30 [2023-11-29 00:46:32,089 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 00:46:44,852 INFO L124 PetriNetUnfolderBase]: 3956/8454 cut-off events. [2023-11-29 00:46:44,852 INFO L125 PetriNetUnfolderBase]: For 354276/354276 co-relation queries the response was YES. [2023-11-29 00:46:44,922 INFO L83 FinitePrefix]: Finished finitePrefix Result has 78687 conditions, 8454 events. 3956/8454 cut-off events. For 354276/354276 co-relation queries the response was YES. Maximal size of possible extension queue 437. Compared 72054 event pairs, 230 based on Foata normal form. 3/8456 useless extension candidates. Maximal degree in co-relation 78547. Up to 3410 conditions per place. [2023-11-29 00:46:44,957 INFO L140 encePairwiseOnDemand]: 14/30 looper letters, 604 selfloop transitions, 807 changer transitions 25/1438 dead transitions. [2023-11-29 00:46:44,957 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 652 places, 1438 transitions, 35493 flow [2023-11-29 00:46:44,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2023-11-29 00:46:44,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2023-11-29 00:46:44,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 592 transitions. [2023-11-29 00:46:44,959 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.298989898989899 [2023-11-29 00:46:44,959 INFO L72 ComplementDD]: Start complementDD. Operand 66 states and 592 transitions. [2023-11-29 00:46:44,959 INFO L73 IsDeterministic]: Start isDeterministic. Operand 66 states and 592 transitions. [2023-11-29 00:46:44,959 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 00:46:44,959 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 66 states and 592 transitions. [2023-11-29 00:46:44,960 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 67 states, 66 states have (on average 8.969696969696969) internal successors, (592), 66 states have internal predecessors, (592), 0 states have call successors, (0), 0 states 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 00:46:44,963 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 67 states, 67 states have (on average 30.0) internal successors, (2010), 67 states have internal predecessors, (2010), 0 states have call successors, (0), 0 states 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 00:46:44,963 INFO L81 ComplementDD]: Finished complementDD. Result has 67 states, 67 states have (on average 30.0) internal successors, (2010), 67 states have internal predecessors, (2010), 0 states have call successors, (0), 0 states 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 00:46:44,963 INFO L175 Difference]: Start difference. First operand has 600 places, 1190 transitions, 29070 flow. Second operand 66 states and 592 transitions. [2023-11-29 00:46:44,963 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 652 places, 1438 transitions, 35493 flow [2023-11-29 00:46:48,463 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 623 places, 1438 transitions, 33150 flow, removed 1048 selfloop flow, removed 29 redundant places. [2023-11-29 00:46:48,494 INFO L231 Difference]: Finished difference. Result has 641 places, 1260 transitions, 31083 flow [2023-11-29 00:46:48,495 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=27046, PETRI_DIFFERENCE_MINUEND_PLACES=558, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1190, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=738, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=423, PETRI_DIFFERENCE_SUBTRAHEND_STATES=66, PETRI_FLOW=31083, PETRI_PLACES=641, PETRI_TRANSITIONS=1260} [2023-11-29 00:46:48,495 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 611 predicate places. [2023-11-29 00:46:48,495 INFO L495 AbstractCegarLoop]: Abstraction has has 641 places, 1260 transitions, 31083 flow [2023-11-29 00:46:48,495 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 5.528301886792453) internal successors, (293), 53 states have internal predecessors, (293), 0 states have call successors, (0), 0 states 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 00:46:48,496 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 00:46:48,496 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:46:48,500 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5de6e5a5-dca5-4d1c-8175-3ad29fb43980/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2023-11-29 00:46:48,696 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5de6e5a5-dca5-4d1c-8175-3ad29fb43980/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2023-11-29 00:46:48,696 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 00:46:48,697 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:46:48,697 INFO L85 PathProgramCache]: Analyzing trace with hash 858172495, now seen corresponding path program 12 times [2023-11-29 00:46:48,697 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:46:48,697 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [801059186] [2023-11-29 00:46:48,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:46:48,697 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:46:48,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:46:49,634 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:46:49,635 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:46:49,635 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [801059186] [2023-11-29 00:46:49,635 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [801059186] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 00:46:49,635 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1005863023] [2023-11-29 00:46:49,635 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-29 00:46:49,635 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:46:49,635 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5de6e5a5-dca5-4d1c-8175-3ad29fb43980/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:46:49,636 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5de6e5a5-dca5-4d1c-8175-3ad29fb43980/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:46:49,637 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5de6e5a5-dca5-4d1c-8175-3ad29fb43980/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-11-29 00:46:49,998 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-11-29 00:46:49,998 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 00:46:50,000 INFO L262 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 39 conjunts are in the unsatisfiable core [2023-11-29 00:46:50,001 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:46:54,597 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 00:46:54,597 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:46:55,435 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 00:46:55,435 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 24 [2023-11-29 00:46:55,638 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-29 00:46:55,638 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1005863023] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 00:46:55,638 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 00:46:55,639 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 14, 12] total 42 [2023-11-29 00:46:55,639 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [792988458] [2023-11-29 00:46:55,639 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 00:46:55,639 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2023-11-29 00:46:55,639 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:46:55,640 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2023-11-29 00:46:55,641 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=1659, Unknown=0, NotChecked=0, Total=1806 [2023-11-29 00:46:55,681 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 30 [2023-11-29 00:46:55,682 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 641 places, 1260 transitions, 31083 flow. Second operand has 43 states, 43 states have (on average 5.8604651162790695) internal successors, (252), 43 states have internal predecessors, (252), 0 states have call successors, (0), 0 states 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 00:46:55,682 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 00:46:55,682 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 30 [2023-11-29 00:46:55,682 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 00:47:02,807 INFO L124 PetriNetUnfolderBase]: 3997/8497 cut-off events. [2023-11-29 00:47:02,807 INFO L125 PetriNetUnfolderBase]: For 380750/380750 co-relation queries the response was YES. [2023-11-29 00:47:02,889 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79978 conditions, 8497 events. 3997/8497 cut-off events. For 380750/380750 co-relation queries the response was YES. Maximal size of possible extension queue 431. Compared 72073 event pairs, 537 based on Foata normal form. 2/8498 useless extension candidates. Maximal degree in co-relation 79823. Up to 4410 conditions per place. [2023-11-29 00:47:02,929 INFO L140 encePairwiseOnDemand]: 15/30 looper letters, 837 selfloop transitions, 508 changer transitions 27/1374 dead transitions. [2023-11-29 00:47:02,929 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 672 places, 1374 transitions, 35231 flow [2023-11-29 00:47:02,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2023-11-29 00:47:02,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2023-11-29 00:47:02,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 348 transitions. [2023-11-29 00:47:02,930 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.32222222222222224 [2023-11-29 00:47:02,931 INFO L72 ComplementDD]: Start complementDD. Operand 36 states and 348 transitions. [2023-11-29 00:47:02,931 INFO L73 IsDeterministic]: Start isDeterministic. Operand 36 states and 348 transitions. [2023-11-29 00:47:02,931 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 00:47:02,931 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 36 states and 348 transitions. [2023-11-29 00:47:02,931 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 37 states, 36 states have (on average 9.666666666666666) internal successors, (348), 36 states have internal predecessors, (348), 0 states have call successors, (0), 0 states 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 00:47:02,932 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 37 states, 37 states have (on average 30.0) internal successors, (1110), 37 states have internal predecessors, (1110), 0 states have call successors, (0), 0 states 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 00:47:02,932 INFO L81 ComplementDD]: Finished complementDD. Result has 37 states, 37 states have (on average 30.0) internal successors, (1110), 37 states have internal predecessors, (1110), 0 states have call successors, (0), 0 states 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 00:47:02,933 INFO L175 Difference]: Start difference. First operand has 641 places, 1260 transitions, 31083 flow. Second operand 36 states and 348 transitions. [2023-11-29 00:47:02,933 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 672 places, 1374 transitions, 35231 flow [2023-11-29 00:47:06,501 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 644 places, 1374 transitions, 34838 flow, removed 104 selfloop flow, removed 28 redundant places. [2023-11-29 00:47:06,532 INFO L231 Difference]: Finished difference. Result has 650 places, 1254 transitions, 32147 flow [2023-11-29 00:47:06,533 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=30688, PETRI_DIFFERENCE_MINUEND_PLACES=609, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1259, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=495, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=757, PETRI_DIFFERENCE_SUBTRAHEND_STATES=36, PETRI_FLOW=32147, PETRI_PLACES=650, PETRI_TRANSITIONS=1254} [2023-11-29 00:47:06,534 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 620 predicate places. [2023-11-29 00:47:06,534 INFO L495 AbstractCegarLoop]: Abstraction has has 650 places, 1254 transitions, 32147 flow [2023-11-29 00:47:06,534 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 5.8604651162790695) internal successors, (252), 43 states have internal predecessors, (252), 0 states have call successors, (0), 0 states 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 00:47:06,534 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 00:47:06,534 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:47:06,539 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5de6e5a5-dca5-4d1c-8175-3ad29fb43980/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2023-11-29 00:47:06,734 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5de6e5a5-dca5-4d1c-8175-3ad29fb43980/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2023-11-29 00:47:06,735 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 00:47:06,735 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:47:06,735 INFO L85 PathProgramCache]: Analyzing trace with hash 1704852285, now seen corresponding path program 13 times [2023-11-29 00:47:06,735 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:47:06,735 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [158891759] [2023-11-29 00:47:06,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:47:06,735 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:47:06,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:47:07,778 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:47:07,778 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:47:07,778 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [158891759] [2023-11-29 00:47:07,778 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [158891759] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 00:47:07,778 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1028767417] [2023-11-29 00:47:07,778 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-29 00:47:07,778 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:47:07,778 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5de6e5a5-dca5-4d1c-8175-3ad29fb43980/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:47:07,779 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5de6e5a5-dca5-4d1c-8175-3ad29fb43980/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:47:07,780 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5de6e5a5-dca5-4d1c-8175-3ad29fb43980/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-11-29 00:47:08,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:47:08,178 INFO L262 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 46 conjunts are in the unsatisfiable core [2023-11-29 00:47:08,180 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:47:08,642 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 3 [2023-11-29 00:47:10,259 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:47:10,259 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:47:11,120 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 00:47:11,120 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 32 [2023-11-29 00:47:11,905 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:47:11,906 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1028767417] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 00:47:11,906 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 00:47:11,906 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17, 17] total 50 [2023-11-29 00:47:11,906 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1885503062] [2023-11-29 00:47:11,906 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 00:47:11,906 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2023-11-29 00:47:11,907 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:47:11,907 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2023-11-29 00:47:11,908 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=305, Invalid=2245, Unknown=0, NotChecked=0, Total=2550 [2023-11-29 00:47:11,995 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 30 [2023-11-29 00:47:11,995 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 650 places, 1254 transitions, 32147 flow. Second operand has 51 states, 51 states have (on average 5.588235294117647) internal successors, (285), 51 states have internal predecessors, (285), 0 states have call successors, (0), 0 states 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 00:47:11,996 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 00:47:11,996 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 30 [2023-11-29 00:47:11,996 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 00:47:16,296 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.40s for a HTC check with result VALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-29 00:47:20,575 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-29 00:47:24,725 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-29 00:47:31,408 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.62s for a HTC check with result VALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-29 00:47:38,295 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-11-29 00:47:41,129 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.82s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-11-29 00:47:42,755 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.62s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-11-29 00:47:46,759 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-11-29 00:47:53,514 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-29 00:47:59,988 INFO L124 PetriNetUnfolderBase]: 4149/8811 cut-off events. [2023-11-29 00:47:59,988 INFO L125 PetriNetUnfolderBase]: For 445164/445164 co-relation queries the response was YES. [2023-11-29 00:48:00,061 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85748 conditions, 8811 events. 4149/8811 cut-off events. For 445164/445164 co-relation queries the response was YES. Maximal size of possible extension queue 440. Compared 75141 event pairs, 534 based on Foata normal form. 5/8815 useless extension candidates. Maximal degree in co-relation 85591. Up to 5439 conditions per place. [2023-11-29 00:48:00,100 INFO L140 encePairwiseOnDemand]: 14/30 looper letters, 759 selfloop transitions, 709 changer transitions 71/1541 dead transitions. [2023-11-29 00:48:00,100 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 719 places, 1541 transitions, 39848 flow [2023-11-29 00:48:00,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2023-11-29 00:48:00,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2023-11-29 00:48:00,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 649 transitions. [2023-11-29 00:48:00,102 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.29634703196347034 [2023-11-29 00:48:00,102 INFO L72 ComplementDD]: Start complementDD. Operand 73 states and 649 transitions. [2023-11-29 00:48:00,102 INFO L73 IsDeterministic]: Start isDeterministic. Operand 73 states and 649 transitions. [2023-11-29 00:48:00,102 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 00:48:00,103 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 73 states and 649 transitions. [2023-11-29 00:48:00,104 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 74 states, 73 states have (on average 8.89041095890411) internal successors, (649), 73 states have internal predecessors, (649), 0 states have call successors, (0), 0 states 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 00:48:00,106 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 74 states, 74 states have (on average 30.0) internal successors, (2220), 74 states have internal predecessors, (2220), 0 states have call successors, (0), 0 states 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 00:48:00,106 INFO L81 ComplementDD]: Finished complementDD. Result has 74 states, 74 states have (on average 30.0) internal successors, (2220), 74 states have internal predecessors, (2220), 0 states have call successors, (0), 0 states 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 00:48:00,106 INFO L175 Difference]: Start difference. First operand has 650 places, 1254 transitions, 32147 flow. Second operand 73 states and 649 transitions. [2023-11-29 00:48:00,106 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 719 places, 1541 transitions, 39848 flow [2023-11-29 00:48:04,086 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 688 places, 1541 transitions, 39530 flow, removed 60 selfloop flow, removed 31 redundant places. [2023-11-29 00:48:04,126 INFO L231 Difference]: Finished difference. Result has 710 places, 1352 transitions, 37320 flow [2023-11-29 00:48:04,127 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=31846, PETRI_DIFFERENCE_MINUEND_PLACES=616, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1254, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=605, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=604, PETRI_DIFFERENCE_SUBTRAHEND_STATES=73, PETRI_FLOW=37320, PETRI_PLACES=710, PETRI_TRANSITIONS=1352} [2023-11-29 00:48:04,128 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 680 predicate places. [2023-11-29 00:48:04,128 INFO L495 AbstractCegarLoop]: Abstraction has has 710 places, 1352 transitions, 37320 flow [2023-11-29 00:48:04,128 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 5.588235294117647) internal successors, (285), 51 states have internal predecessors, (285), 0 states have call successors, (0), 0 states 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 00:48:04,128 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 00:48:04,128 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:48:04,133 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5de6e5a5-dca5-4d1c-8175-3ad29fb43980/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2023-11-29 00:48:04,328 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5de6e5a5-dca5-4d1c-8175-3ad29fb43980/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:48:04,329 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 00:48:04,329 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:48:04,329 INFO L85 PathProgramCache]: Analyzing trace with hash 1298672393, now seen corresponding path program 14 times [2023-11-29 00:48:04,329 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:48:04,329 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [145814942] [2023-11-29 00:48:04,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:48:04,329 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:48:04,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:48:05,312 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:48:05,312 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:48:05,312 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [145814942] [2023-11-29 00:48:05,312 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [145814942] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 00:48:05,312 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1291749118] [2023-11-29 00:48:05,312 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 00:48:05,313 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:48:05,313 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5de6e5a5-dca5-4d1c-8175-3ad29fb43980/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:48:05,314 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5de6e5a5-dca5-4d1c-8175-3ad29fb43980/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:48:05,314 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5de6e5a5-dca5-4d1c-8175-3ad29fb43980/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-11-29 00:48:05,731 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 00:48:05,731 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 00:48:05,733 INFO L262 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 46 conjunts are in the unsatisfiable core [2023-11-29 00:48:05,734 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:48:06,265 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 00:48:06,266 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 17 [2023-11-29 00:48:07,680 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:48:07,680 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:48:08,655 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 00:48:08,656 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 24 [2023-11-29 00:48:09,222 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:48:09,222 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1291749118] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 00:48:09,222 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 00:48:09,222 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17, 16] total 49 [2023-11-29 00:48:09,222 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [757198310] [2023-11-29 00:48:09,222 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 00:48:09,223 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2023-11-29 00:48:09,223 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:48:09,223 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2023-11-29 00:48:09,224 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=258, Invalid=2192, Unknown=0, NotChecked=0, Total=2450 [2023-11-29 00:48:09,231 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 30 [2023-11-29 00:48:09,231 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 710 places, 1352 transitions, 37320 flow. Second operand has 50 states, 50 states have (on average 5.62) internal successors, (281), 50 states have internal predecessors, (281), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:48:09,231 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 00:48:09,231 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 30 [2023-11-29 00:48:09,231 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 00:48:25,278 INFO L124 PetriNetUnfolderBase]: 4807/10069 cut-off events. [2023-11-29 00:48:25,278 INFO L125 PetriNetUnfolderBase]: For 592716/592716 co-relation queries the response was YES. [2023-11-29 00:48:25,413 INFO L83 FinitePrefix]: Finished finitePrefix Result has 105198 conditions, 10069 events. 4807/10069 cut-off events. For 592716/592716 co-relation queries the response was YES. Maximal size of possible extension queue 518. Compared 87096 event pairs, 499 based on Foata normal form. 6/10074 useless extension candidates. Maximal degree in co-relation 105025. Up to 5128 conditions per place. [2023-11-29 00:48:25,478 INFO L140 encePairwiseOnDemand]: 13/30 looper letters, 681 selfloop transitions, 1096 changer transitions 59/1838 dead transitions. [2023-11-29 00:48:25,478 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 775 places, 1838 transitions, 51864 flow [2023-11-29 00:48:25,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2023-11-29 00:48:25,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2023-11-29 00:48:25,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 699 transitions. [2023-11-29 00:48:25,480 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2949367088607595 [2023-11-29 00:48:25,480 INFO L72 ComplementDD]: Start complementDD. Operand 79 states and 699 transitions. [2023-11-29 00:48:25,480 INFO L73 IsDeterministic]: Start isDeterministic. Operand 79 states and 699 transitions. [2023-11-29 00:48:25,481 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 00:48:25,481 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 79 states and 699 transitions. [2023-11-29 00:48:25,483 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 80 states, 79 states have (on average 8.848101265822784) internal successors, (699), 79 states have internal predecessors, (699), 0 states have call successors, (0), 0 states 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 00:48:25,486 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 80 states, 80 states have (on average 30.0) internal successors, (2400), 80 states have internal predecessors, (2400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:48:25,486 INFO L81 ComplementDD]: Finished complementDD. Result has 80 states, 80 states have (on average 30.0) internal successors, (2400), 80 states have internal predecessors, (2400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:48:25,486 INFO L175 Difference]: Start difference. First operand has 710 places, 1352 transitions, 37320 flow. Second operand 79 states and 699 transitions. [2023-11-29 00:48:25,487 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 775 places, 1838 transitions, 51864 flow [2023-11-29 00:48:31,305 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 735 places, 1838 transitions, 51168 flow, removed 152 selfloop flow, removed 40 redundant places. [2023-11-29 00:48:31,349 INFO L231 Difference]: Finished difference. Result has 756 places, 1629 transitions, 48865 flow [2023-11-29 00:48:31,350 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=36725, PETRI_DIFFERENCE_MINUEND_PLACES=657, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1352, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=843, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=439, PETRI_DIFFERENCE_SUBTRAHEND_STATES=79, PETRI_FLOW=48865, PETRI_PLACES=756, PETRI_TRANSITIONS=1629} [2023-11-29 00:48:31,350 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 726 predicate places. [2023-11-29 00:48:31,350 INFO L495 AbstractCegarLoop]: Abstraction has has 756 places, 1629 transitions, 48865 flow [2023-11-29 00:48:31,350 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 5.62) internal successors, (281), 50 states have internal predecessors, (281), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:48:31,350 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 00:48:31,351 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:48:31,356 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5de6e5a5-dca5-4d1c-8175-3ad29fb43980/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2023-11-29 00:48:31,551 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5de6e5a5-dca5-4d1c-8175-3ad29fb43980/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:48:31,551 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 00:48:31,551 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:48:31,551 INFO L85 PathProgramCache]: Analyzing trace with hash 261625183, now seen corresponding path program 15 times [2023-11-29 00:48:31,552 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:48:31,552 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1956529498] [2023-11-29 00:48:31,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:48:31,552 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:48:31,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:48:32,511 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:48:32,511 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:48:32,511 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1956529498] [2023-11-29 00:48:32,511 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1956529498] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 00:48:32,511 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1099496950] [2023-11-29 00:48:32,511 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-29 00:48:32,511 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:48:32,512 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5de6e5a5-dca5-4d1c-8175-3ad29fb43980/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:48:32,512 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5de6e5a5-dca5-4d1c-8175-3ad29fb43980/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:48:32,513 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5de6e5a5-dca5-4d1c-8175-3ad29fb43980/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-11-29 00:48:33,039 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-29 00:48:33,039 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 00:48:33,041 INFO L262 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 47 conjunts are in the unsatisfiable core [2023-11-29 00:48:33,042 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:48:33,519 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 3 [2023-11-29 00:48:34,288 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:48:34,288 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:48:35,399 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 00:48:35,399 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 24 [2023-11-29 00:48:36,058 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:48:36,059 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1099496950] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 00:48:36,059 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 00:48:36,059 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 17, 16] total 50 [2023-11-29 00:48:36,059 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1448193979] [2023-11-29 00:48:36,059 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 00:48:36,059 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2023-11-29 00:48:36,060 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:48:36,060 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2023-11-29 00:48:36,061 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=321, Invalid=2229, Unknown=0, NotChecked=0, Total=2550 [2023-11-29 00:48:36,114 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 30 [2023-11-29 00:48:36,114 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 756 places, 1629 transitions, 48865 flow. Second operand has 51 states, 51 states have (on average 5.588235294117647) internal successors, (285), 51 states have internal predecessors, (285), 0 states have call successors, (0), 0 states 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 00:48:36,114 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 00:48:36,114 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 30 [2023-11-29 00:48:36,115 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 00:49:02,779 INFO L124 PetriNetUnfolderBase]: 5483/11606 cut-off events. [2023-11-29 00:49:02,779 INFO L125 PetriNetUnfolderBase]: For 776928/776928 co-relation queries the response was YES. [2023-11-29 00:49:02,899 INFO L83 FinitePrefix]: Finished finitePrefix Result has 127888 conditions, 11606 events. 5483/11606 cut-off events. For 776928/776928 co-relation queries the response was YES. Maximal size of possible extension queue 651. Compared 104631 event pairs, 553 based on Foata normal form. 6/11611 useless extension candidates. Maximal degree in co-relation 127702. Up to 5546 conditions per place. [2023-11-29 00:49:02,955 INFO L140 encePairwiseOnDemand]: 13/30 looper letters, 1009 selfloop transitions, 1228 changer transitions 30/2269 dead transitions. [2023-11-29 00:49:02,955 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 883 places, 2269 transitions, 67040 flow [2023-11-29 00:49:02,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 132 states. [2023-11-29 00:49:02,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 132 states. [2023-11-29 00:49:02,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 1163 transitions. [2023-11-29 00:49:02,958 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.29368686868686866 [2023-11-29 00:49:02,958 INFO L72 ComplementDD]: Start complementDD. Operand 132 states and 1163 transitions. [2023-11-29 00:49:02,958 INFO L73 IsDeterministic]: Start isDeterministic. Operand 132 states and 1163 transitions. [2023-11-29 00:49:02,959 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 00:49:02,959 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 132 states and 1163 transitions. [2023-11-29 00:49:02,960 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 133 states, 132 states have (on average 8.81060606060606) internal successors, (1163), 132 states have internal predecessors, (1163), 0 states have call successors, (0), 0 states 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 00:49:02,964 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 133 states, 133 states have (on average 30.0) internal successors, (3990), 133 states have internal predecessors, (3990), 0 states have call successors, (0), 0 states 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 00:49:02,964 INFO L81 ComplementDD]: Finished complementDD. Result has 133 states, 133 states have (on average 30.0) internal successors, (3990), 133 states have internal predecessors, (3990), 0 states have call successors, (0), 0 states 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 00:49:02,964 INFO L175 Difference]: Start difference. First operand has 756 places, 1629 transitions, 48865 flow. Second operand 132 states and 1163 transitions. [2023-11-29 00:49:02,964 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 883 places, 2269 transitions, 67040 flow [2023-11-29 00:49:12,187 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 854 places, 2269 transitions, 66175 flow, removed 320 selfloop flow, removed 29 redundant places. [2023-11-29 00:49:12,248 INFO L231 Difference]: Finished difference. Result has 897 places, 1969 transitions, 62538 flow [2023-11-29 00:49:12,249 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=48184, PETRI_DIFFERENCE_MINUEND_PLACES=723, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1629, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=919, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=612, PETRI_DIFFERENCE_SUBTRAHEND_STATES=132, PETRI_FLOW=62538, PETRI_PLACES=897, PETRI_TRANSITIONS=1969} [2023-11-29 00:49:12,249 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 867 predicate places. [2023-11-29 00:49:12,250 INFO L495 AbstractCegarLoop]: Abstraction has has 897 places, 1969 transitions, 62538 flow [2023-11-29 00:49:12,250 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 5.588235294117647) internal successors, (285), 51 states have internal predecessors, (285), 0 states have call successors, (0), 0 states 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 00:49:12,250 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 00:49:12,250 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:49:12,254 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5de6e5a5-dca5-4d1c-8175-3ad29fb43980/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2023-11-29 00:49:12,450 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5de6e5a5-dca5-4d1c-8175-3ad29fb43980/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:49:12,450 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 00:49:12,451 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:49:12,451 INFO L85 PathProgramCache]: Analyzing trace with hash -1368782363, now seen corresponding path program 16 times [2023-11-29 00:49:12,451 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:49:12,451 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [961775182] [2023-11-29 00:49:12,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:49:12,451 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:49:12,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:49:13,344 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:49:13,344 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:49:13,344 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [961775182] [2023-11-29 00:49:13,345 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [961775182] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 00:49:13,345 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1713577681] [2023-11-29 00:49:13,345 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-29 00:49:13,345 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:49:13,345 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5de6e5a5-dca5-4d1c-8175-3ad29fb43980/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:49:13,346 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5de6e5a5-dca5-4d1c-8175-3ad29fb43980/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:49:13,346 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5de6e5a5-dca5-4d1c-8175-3ad29fb43980/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-11-29 00:49:13,664 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-29 00:49:13,664 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 00:49:13,665 INFO L262 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 47 conjunts are in the unsatisfiable core [2023-11-29 00:49:13,667 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:49:14,096 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 3 [2023-11-29 00:49:18,495 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:49:18,495 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:49:19,367 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 00:49:19,367 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 51 treesize of output 43 [2023-11-29 00:49:20,208 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:49:20,208 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1713577681] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 00:49:20,208 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 00:49:20,209 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 17, 16] total 50 [2023-11-29 00:49:20,209 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [993446316] [2023-11-29 00:49:20,209 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 00:49:20,209 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2023-11-29 00:49:20,209 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:49:20,210 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2023-11-29 00:49:20,211 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=287, Invalid=2263, Unknown=0, NotChecked=0, Total=2550 [2023-11-29 00:49:20,247 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 30 [2023-11-29 00:49:20,247 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 897 places, 1969 transitions, 62538 flow. Second operand has 51 states, 51 states have (on average 5.588235294117647) internal successors, (285), 51 states have internal predecessors, (285), 0 states have call successors, (0), 0 states 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 00:49:20,247 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 00:49:20,247 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 30 [2023-11-29 00:49:20,247 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 00:49:45,501 INFO L124 PetriNetUnfolderBase]: 5865/12437 cut-off events. [2023-11-29 00:49:45,502 INFO L125 PetriNetUnfolderBase]: For 884900/884900 co-relation queries the response was YES. [2023-11-29 00:49:45,655 INFO L83 FinitePrefix]: Finished finitePrefix Result has 141566 conditions, 12437 events. 5865/12437 cut-off events. For 884900/884900 co-relation queries the response was YES. Maximal size of possible extension queue 697. Compared 113735 event pairs, 586 based on Foata normal form. 17/12453 useless extension candidates. Maximal degree in co-relation 141343. Up to 5950 conditions per place. [2023-11-29 00:49:45,716 INFO L140 encePairwiseOnDemand]: 13/30 looper letters, 942 selfloop transitions, 1421 changer transitions 79/2444 dead transitions. [2023-11-29 00:49:45,716 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1005 places, 2444 transitions, 74947 flow [2023-11-29 00:49:45,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 112 states. [2023-11-29 00:49:45,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2023-11-29 00:49:45,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 1059 transitions. [2023-11-29 00:49:45,718 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3151785714285714 [2023-11-29 00:49:45,718 INFO L72 ComplementDD]: Start complementDD. Operand 112 states and 1059 transitions. [2023-11-29 00:49:45,718 INFO L73 IsDeterministic]: Start isDeterministic. Operand 112 states and 1059 transitions. [2023-11-29 00:49:45,719 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 00:49:45,719 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 112 states and 1059 transitions. [2023-11-29 00:49:45,720 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 113 states, 112 states have (on average 9.455357142857142) internal successors, (1059), 112 states have internal predecessors, (1059), 0 states have call successors, (0), 0 states 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 00:49:45,723 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 113 states, 113 states have (on average 30.0) internal successors, (3390), 113 states have internal predecessors, (3390), 0 states have call successors, (0), 0 states 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 00:49:45,755 INFO L81 ComplementDD]: Finished complementDD. Result has 113 states, 113 states have (on average 30.0) internal successors, (3390), 113 states have internal predecessors, (3390), 0 states have call successors, (0), 0 states 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 00:49:45,755 INFO L175 Difference]: Start difference. First operand has 897 places, 1969 transitions, 62538 flow. Second operand 112 states and 1059 transitions. [2023-11-29 00:49:45,755 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1005 places, 2444 transitions, 74947 flow [2023-11-29 00:49:57,511 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 974 places, 2444 transitions, 73897 flow, removed 393 selfloop flow, removed 31 redundant places. [2023-11-29 00:49:57,577 INFO L231 Difference]: Finished difference. Result has 1001 places, 2121 transitions, 71150 flow [2023-11-29 00:49:57,578 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=61524, PETRI_DIFFERENCE_MINUEND_PLACES=863, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1969, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1270, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=639, PETRI_DIFFERENCE_SUBTRAHEND_STATES=112, PETRI_FLOW=71150, PETRI_PLACES=1001, PETRI_TRANSITIONS=2121} [2023-11-29 00:49:57,579 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 971 predicate places. [2023-11-29 00:49:57,579 INFO L495 AbstractCegarLoop]: Abstraction has has 1001 places, 2121 transitions, 71150 flow [2023-11-29 00:49:57,579 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 5.588235294117647) internal successors, (285), 51 states have internal predecessors, (285), 0 states have call successors, (0), 0 states 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 00:49:57,579 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 00:49:57,579 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:49:57,584 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5de6e5a5-dca5-4d1c-8175-3ad29fb43980/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2023-11-29 00:49:57,779 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5de6e5a5-dca5-4d1c-8175-3ad29fb43980/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:49:57,780 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 00:49:57,780 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:49:57,780 INFO L85 PathProgramCache]: Analyzing trace with hash -879667057, now seen corresponding path program 17 times [2023-11-29 00:49:57,780 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:49:57,780 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [793988590] [2023-11-29 00:49:57,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:49:57,780 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:49:57,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:49:58,607 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:49:58,608 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:49:58,608 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [793988590] [2023-11-29 00:49:58,608 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [793988590] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 00:49:58,608 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2017032197] [2023-11-29 00:49:58,608 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-29 00:49:58,608 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:49:58,608 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5de6e5a5-dca5-4d1c-8175-3ad29fb43980/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:49:58,609 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5de6e5a5-dca5-4d1c-8175-3ad29fb43980/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:49:58,610 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5de6e5a5-dca5-4d1c-8175-3ad29fb43980/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-11-29 00:49:59,039 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 00:49:59,039 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 00:49:59,040 INFO L262 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 47 conjunts are in the unsatisfiable core [2023-11-29 00:49:59,042 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:49:59,464 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 3 [2023-11-29 00:50:00,317 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:50:00,317 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:50:01,412 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 00:50:01,412 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 43 treesize of output 27 [2023-11-29 00:50:02,035 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:50:02,035 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2017032197] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 00:50:02,035 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 00:50:02,036 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18, 17] total 52 [2023-11-29 00:50:02,036 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1066146668] [2023-11-29 00:50:02,036 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 00:50:02,036 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2023-11-29 00:50:02,036 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:50:02,037 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2023-11-29 00:50:02,038 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=291, Invalid=2465, Unknown=0, NotChecked=0, Total=2756 [2023-11-29 00:50:02,064 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 30 [2023-11-29 00:50:02,064 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1001 places, 2121 transitions, 71150 flow. Second operand has 53 states, 53 states have (on average 5.528301886792453) internal successors, (293), 53 states have internal predecessors, (293), 0 states have call successors, (0), 0 states 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 00:50:02,064 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 00:50:02,064 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 30 [2023-11-29 00:50:02,064 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 00:50:19,677 INFO L124 PetriNetUnfolderBase]: 5722/12106 cut-off events. [2023-11-29 00:50:19,677 INFO L125 PetriNetUnfolderBase]: For 988851/988851 co-relation queries the response was YES. [2023-11-29 00:50:19,865 INFO L83 FinitePrefix]: Finished finitePrefix Result has 146452 conditions, 12106 events. 5722/12106 cut-off events. For 988851/988851 co-relation queries the response was YES. Maximal size of possible extension queue 684. Compared 109826 event pairs, 497 based on Foata normal form. 3/12108 useless extension candidates. Maximal degree in co-relation 146206. Up to 6338 conditions per place. [2023-11-29 00:50:19,946 INFO L140 encePairwiseOnDemand]: 13/30 looper letters, 1122 selfloop transitions, 1097 changer transitions 48/2269 dead transitions. [2023-11-29 00:50:19,946 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1037 places, 2269 transitions, 77698 flow [2023-11-29 00:50:19,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2023-11-29 00:50:19,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2023-11-29 00:50:19,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 448 transitions. [2023-11-29 00:50:19,948 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3177304964539007 [2023-11-29 00:50:19,948 INFO L72 ComplementDD]: Start complementDD. Operand 47 states and 448 transitions. [2023-11-29 00:50:19,948 INFO L73 IsDeterministic]: Start isDeterministic. Operand 47 states and 448 transitions. [2023-11-29 00:50:19,948 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 00:50:19,948 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 47 states and 448 transitions. [2023-11-29 00:50:19,949 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 48 states, 47 states have (on average 9.53191489361702) internal successors, (448), 47 states have internal predecessors, (448), 0 states have call successors, (0), 0 states 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 00:50:19,951 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 48 states, 48 states have (on average 30.0) internal successors, (1440), 48 states have internal predecessors, (1440), 0 states have call successors, (0), 0 states 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 00:50:19,951 INFO L81 ComplementDD]: Finished complementDD. Result has 48 states, 48 states have (on average 30.0) internal successors, (1440), 48 states have internal predecessors, (1440), 0 states have call successors, (0), 0 states 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 00:50:19,951 INFO L175 Difference]: Start difference. First operand has 1001 places, 2121 transitions, 71150 flow. Second operand 47 states and 448 transitions. [2023-11-29 00:50:19,951 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1037 places, 2269 transitions, 77698 flow [2023-11-29 00:50:33,517 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 972 places, 2269 transitions, 76392 flow, removed 333 selfloop flow, removed 65 redundant places. [2023-11-29 00:50:33,586 INFO L231 Difference]: Finished difference. Result has 979 places, 2118 transitions, 72985 flow [2023-11-29 00:50:33,588 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=69873, PETRI_DIFFERENCE_MINUEND_PLACES=926, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2120, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1081, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1032, PETRI_DIFFERENCE_SUBTRAHEND_STATES=47, PETRI_FLOW=72985, PETRI_PLACES=979, PETRI_TRANSITIONS=2118} [2023-11-29 00:50:33,588 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 949 predicate places. [2023-11-29 00:50:33,588 INFO L495 AbstractCegarLoop]: Abstraction has has 979 places, 2118 transitions, 72985 flow [2023-11-29 00:50:33,588 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 5.528301886792453) internal successors, (293), 53 states have internal predecessors, (293), 0 states have call successors, (0), 0 states 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 00:50:33,589 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 00:50:33,589 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:50:33,593 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5de6e5a5-dca5-4d1c-8175-3ad29fb43980/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2023-11-29 00:50:33,789 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5de6e5a5-dca5-4d1c-8175-3ad29fb43980/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2023-11-29 00:50:33,789 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 00:50:33,789 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:50:33,790 INFO L85 PathProgramCache]: Analyzing trace with hash 666992923, now seen corresponding path program 18 times [2023-11-29 00:50:33,790 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:50:33,790 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [418507097] [2023-11-29 00:50:33,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:50:33,790 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:50:33,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:50:34,752 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:50:34,752 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:50:34,752 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [418507097] [2023-11-29 00:50:34,752 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [418507097] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 00:50:34,752 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1752391619] [2023-11-29 00:50:34,752 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-29 00:50:34,753 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:50:34,753 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5de6e5a5-dca5-4d1c-8175-3ad29fb43980/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:50:34,753 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5de6e5a5-dca5-4d1c-8175-3ad29fb43980/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:50:34,754 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5de6e5a5-dca5-4d1c-8175-3ad29fb43980/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2023-11-29 00:50:35,181 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-11-29 00:50:35,181 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 00:50:35,183 INFO L262 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 46 conjunts are in the unsatisfiable core [2023-11-29 00:50:35,184 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:50:35,625 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 00:50:35,626 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 17 [2023-11-29 00:50:36,257 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:50:36,257 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:50:37,358 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 00:50:37,358 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 24 [2023-11-29 00:50:37,991 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:50:37,991 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1752391619] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 00:50:37,991 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 00:50:37,991 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 17, 16] total 50 [2023-11-29 00:50:37,992 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [172181606] [2023-11-29 00:50:37,992 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 00:50:37,992 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2023-11-29 00:50:37,992 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:50:37,993 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2023-11-29 00:50:37,994 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=287, Invalid=2263, Unknown=0, NotChecked=0, Total=2550 [2023-11-29 00:50:38,040 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 30 [2023-11-29 00:50:38,041 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 979 places, 2118 transitions, 72985 flow. Second operand has 51 states, 51 states have (on average 5.588235294117647) internal successors, (285), 51 states have internal predecessors, (285), 0 states have call successors, (0), 0 states 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 00:50:38,041 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 00:50:38,041 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 30 [2023-11-29 00:50:38,041 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 00:50:58,265 INFO L124 PetriNetUnfolderBase]: 5738/12149 cut-off events. [2023-11-29 00:50:58,265 INFO L125 PetriNetUnfolderBase]: For 1076455/1076455 co-relation queries the response was YES. [2023-11-29 00:50:58,447 INFO L83 FinitePrefix]: Finished finitePrefix Result has 150450 conditions, 12149 events. 5738/12149 cut-off events. For 1076455/1076455 co-relation queries the response was YES. Maximal size of possible extension queue 677. Compared 110044 event pairs, 588 based on Foata normal form. 5/12153 useless extension candidates. Maximal degree in co-relation 150211. Up to 5931 conditions per place. [2023-11-29 00:50:58,529 INFO L140 encePairwiseOnDemand]: 12/30 looper letters, 838 selfloop transitions, 1434 changer transitions 19/2293 dead transitions. [2023-11-29 00:50:58,529 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1035 places, 2293 transitions, 79881 flow [2023-11-29 00:50:58,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2023-11-29 00:50:58,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2023-11-29 00:50:58,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 634 transitions. [2023-11-29 00:50:58,532 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.28949771689497716 [2023-11-29 00:50:58,532 INFO L72 ComplementDD]: Start complementDD. Operand 73 states and 634 transitions. [2023-11-29 00:50:58,532 INFO L73 IsDeterministic]: Start isDeterministic. Operand 73 states and 634 transitions. [2023-11-29 00:50:58,532 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 00:50:58,532 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 73 states and 634 transitions. [2023-11-29 00:50:58,533 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 74 states, 73 states have (on average 8.684931506849315) internal successors, (634), 73 states have internal predecessors, (634), 0 states have call successors, (0), 0 states 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 00:50:58,536 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 74 states, 74 states have (on average 30.0) internal successors, (2220), 74 states have internal predecessors, (2220), 0 states have call successors, (0), 0 states 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 00:50:58,536 INFO L81 ComplementDD]: Finished complementDD. Result has 74 states, 74 states have (on average 30.0) internal successors, (2220), 74 states have internal predecessors, (2220), 0 states have call successors, (0), 0 states 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 00:50:58,536 INFO L175 Difference]: Start difference. First operand has 979 places, 2118 transitions, 72985 flow. Second operand 73 states and 634 transitions. [2023-11-29 00:50:58,536 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1035 places, 2293 transitions, 79881 flow [2023-11-29 00:51:13,444 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1002 places, 2293 transitions, 79435 flow, removed 73 selfloop flow, removed 33 redundant places. [2023-11-29 00:51:13,543 INFO L231 Difference]: Finished difference. Result has 1007 places, 2133 transitions, 76036 flow [2023-11-29 00:51:13,544 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=72575, PETRI_DIFFERENCE_MINUEND_PLACES=930, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2118, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1420, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=694, PETRI_DIFFERENCE_SUBTRAHEND_STATES=73, PETRI_FLOW=76036, PETRI_PLACES=1007, PETRI_TRANSITIONS=2133} [2023-11-29 00:51:13,544 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 977 predicate places. [2023-11-29 00:51:13,545 INFO L495 AbstractCegarLoop]: Abstraction has has 1007 places, 2133 transitions, 76036 flow [2023-11-29 00:51:13,545 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 5.588235294117647) internal successors, (285), 51 states have internal predecessors, (285), 0 states have call successors, (0), 0 states 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 00:51:13,545 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 00:51:13,545 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:51:13,549 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5de6e5a5-dca5-4d1c-8175-3ad29fb43980/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2023-11-29 00:51:13,745 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5de6e5a5-dca5-4d1c-8175-3ad29fb43980/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2023-11-29 00:51:13,745 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 00:51:13,745 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:51:13,746 INFO L85 PathProgramCache]: Analyzing trace with hash -1948868231, now seen corresponding path program 19 times [2023-11-29 00:51:13,746 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:51:13,746 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1202722943] [2023-11-29 00:51:13,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:51:13,746 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:51:13,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:51:14,644 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:51:14,645 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:51:14,645 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1202722943] [2023-11-29 00:51:14,645 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1202722943] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 00:51:14,645 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [334637395] [2023-11-29 00:51:14,645 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-29 00:51:14,645 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:51:14,645 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5de6e5a5-dca5-4d1c-8175-3ad29fb43980/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:51:14,646 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5de6e5a5-dca5-4d1c-8175-3ad29fb43980/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:51:14,647 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5de6e5a5-dca5-4d1c-8175-3ad29fb43980/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2023-11-29 00:51:14,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:51:14,991 INFO L262 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 46 conjunts are in the unsatisfiable core [2023-11-29 00:51:14,992 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:51:15,408 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 3 [2023-11-29 00:51:16,529 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:51:16,529 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:51:17,466 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 00:51:17,466 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 32 [2023-11-29 00:51:18,346 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:51:18,346 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [334637395] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 00:51:18,346 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 00:51:18,346 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 17, 17] total 51 [2023-11-29 00:51:18,347 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1437546563] [2023-11-29 00:51:18,347 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 00:51:18,347 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2023-11-29 00:51:18,347 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:51:18,347 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2023-11-29 00:51:18,348 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=308, Invalid=2344, Unknown=0, NotChecked=0, Total=2652 [2023-11-29 00:51:18,377 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 30 [2023-11-29 00:51:18,378 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1007 places, 2133 transitions, 76036 flow. Second operand has 52 states, 52 states have (on average 5.5576923076923075) internal successors, (289), 52 states have internal predecessors, (289), 0 states have call successors, (0), 0 states 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 00:51:18,378 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 00:51:18,378 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 30 [2023-11-29 00:51:18,378 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 00:51:25,100 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.11s for a HTC check with result VALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-29 00:51:29,439 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-29 00:51:35,568 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-29 00:51:38,394 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.54s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-29 00:51:51,404 INFO L124 PetriNetUnfolderBase]: 5777/12253 cut-off events. [2023-11-29 00:51:51,404 INFO L125 PetriNetUnfolderBase]: For 1149007/1149007 co-relation queries the response was YES. [2023-11-29 00:51:51,637 INFO L83 FinitePrefix]: Finished finitePrefix Result has 155863 conditions, 12253 events. 5777/12253 cut-off events. For 1149007/1149007 co-relation queries the response was YES. Maximal size of possible extension queue 695. Compared 111806 event pairs, 684 based on Foata normal form. 5/12257 useless extension candidates. Maximal degree in co-relation 155623. Up to 7527 conditions per place. [2023-11-29 00:51:51,727 INFO L140 encePairwiseOnDemand]: 13/30 looper letters, 1057 selfloop transitions, 1167 changer transitions 42/2268 dead transitions. [2023-11-29 00:51:51,727 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1066 places, 2268 transitions, 82236 flow [2023-11-29 00:51:51,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2023-11-29 00:51:51,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2023-11-29 00:51:51,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 562 transitions. [2023-11-29 00:51:51,729 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.307103825136612 [2023-11-29 00:51:51,729 INFO L72 ComplementDD]: Start complementDD. Operand 61 states and 562 transitions. [2023-11-29 00:51:51,729 INFO L73 IsDeterministic]: Start isDeterministic. Operand 61 states and 562 transitions. [2023-11-29 00:51:51,730 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 00:51:51,730 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 61 states and 562 transitions. [2023-11-29 00:51:51,731 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 62 states, 61 states have (on average 9.21311475409836) internal successors, (562), 61 states have internal predecessors, (562), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:51:51,733 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 62 states, 62 states have (on average 30.0) internal successors, (1860), 62 states have internal predecessors, (1860), 0 states have call successors, (0), 0 states 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 00:51:51,733 INFO L81 ComplementDD]: Finished complementDD. Result has 62 states, 62 states have (on average 30.0) internal successors, (1860), 62 states have internal predecessors, (1860), 0 states have call successors, (0), 0 states 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 00:51:51,733 INFO L175 Difference]: Start difference. First operand has 1007 places, 2133 transitions, 76036 flow. Second operand 61 states and 562 transitions. [2023-11-29 00:51:51,734 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1066 places, 2268 transitions, 82236 flow [2023-11-29 00:52:09,689 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1018 places, 2268 transitions, 81435 flow, removed 92 selfloop flow, removed 48 redundant places. [2023-11-29 00:52:09,778 INFO L231 Difference]: Finished difference. Result has 1026 places, 2133 transitions, 79260 flow [2023-11-29 00:52:09,780 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=75235, PETRI_DIFFERENCE_MINUEND_PLACES=958, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2133, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1156, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=969, PETRI_DIFFERENCE_SUBTRAHEND_STATES=61, PETRI_FLOW=79260, PETRI_PLACES=1026, PETRI_TRANSITIONS=2133} [2023-11-29 00:52:09,780 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 996 predicate places. [2023-11-29 00:52:09,781 INFO L495 AbstractCegarLoop]: Abstraction has has 1026 places, 2133 transitions, 79260 flow [2023-11-29 00:52:09,781 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 5.5576923076923075) internal successors, (289), 52 states have internal predecessors, (289), 0 states have call successors, (0), 0 states 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 00:52:09,781 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 00:52:09,781 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:52:09,786 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5de6e5a5-dca5-4d1c-8175-3ad29fb43980/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2023-11-29 00:52:09,981 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5de6e5a5-dca5-4d1c-8175-3ad29fb43980/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:52:09,981 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 00:52:09,982 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:52:09,982 INFO L85 PathProgramCache]: Analyzing trace with hash 374323155, now seen corresponding path program 20 times [2023-11-29 00:52:09,982 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:52:09,982 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1579313340] [2023-11-29 00:52:09,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:52:09,982 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:52:09,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:52:10,962 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:52:10,962 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:52:10,963 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1579313340] [2023-11-29 00:52:10,963 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1579313340] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 00:52:10,963 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1131543411] [2023-11-29 00:52:10,963 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 00:52:10,963 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:52:10,963 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5de6e5a5-dca5-4d1c-8175-3ad29fb43980/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:52:10,964 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5de6e5a5-dca5-4d1c-8175-3ad29fb43980/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:52:10,964 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5de6e5a5-dca5-4d1c-8175-3ad29fb43980/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2023-11-29 00:52:11,291 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 00:52:11,291 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 00:52:11,293 INFO L262 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 46 conjunts are in the unsatisfiable core [2023-11-29 00:52:11,295 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:52:11,686 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 3 [2023-11-29 00:52:12,146 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:52:12,146 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:52:13,091 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 00:52:13,091 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 51 treesize of output 43 [2023-11-29 00:52:13,887 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:52:13,887 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1131543411] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 00:52:13,887 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 00:52:13,887 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 17, 16] total 50 [2023-11-29 00:52:13,888 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1673645742] [2023-11-29 00:52:13,888 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 00:52:13,888 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2023-11-29 00:52:13,888 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:52:13,889 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2023-11-29 00:52:13,890 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=325, Invalid=2225, Unknown=0, NotChecked=0, Total=2550 [2023-11-29 00:52:13,926 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 30 [2023-11-29 00:52:13,927 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1026 places, 2133 transitions, 79260 flow. Second operand has 51 states, 51 states have (on average 5.588235294117647) internal successors, (285), 51 states have internal predecessors, (285), 0 states have call successors, (0), 0 states 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 00:52:13,927 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 00:52:13,927 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 30 [2023-11-29 00:52:13,927 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 00:52:29,797 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.14s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-11-29 00:52:38,512 INFO L124 PetriNetUnfolderBase]: 5811/12281 cut-off events. [2023-11-29 00:52:38,512 INFO L125 PetriNetUnfolderBase]: For 1275481/1275481 co-relation queries the response was YES. [2023-11-29 00:52:38,837 INFO L83 FinitePrefix]: Finished finitePrefix Result has 161990 conditions, 12281 events. 5811/12281 cut-off events. For 1275481/1275481 co-relation queries the response was YES. Maximal size of possible extension queue 709. Compared 111293 event pairs, 698 based on Foata normal form. 3/12283 useless extension candidates. Maximal degree in co-relation 161743. Up to 7136 conditions per place. [2023-11-29 00:52:38,922 INFO L140 encePairwiseOnDemand]: 13/30 looper letters, 996 selfloop transitions, 1275 changer transitions 47/2320 dead transitions. [2023-11-29 00:52:38,922 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1085 places, 2320 transitions, 87224 flow [2023-11-29 00:52:38,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2023-11-29 00:52:38,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2023-11-29 00:52:38,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 623 transitions. [2023-11-29 00:52:38,924 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2924882629107981 [2023-11-29 00:52:38,924 INFO L72 ComplementDD]: Start complementDD. Operand 71 states and 623 transitions. [2023-11-29 00:52:38,924 INFO L73 IsDeterministic]: Start isDeterministic. Operand 71 states and 623 transitions. [2023-11-29 00:52:38,924 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 00:52:38,924 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 71 states and 623 transitions. [2023-11-29 00:52:38,925 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 72 states, 71 states have (on average 8.774647887323944) internal successors, (623), 71 states have internal predecessors, (623), 0 states have call successors, (0), 0 states 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 00:52:38,928 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 72 states, 72 states have (on average 30.0) internal successors, (2160), 72 states have internal predecessors, (2160), 0 states have call successors, (0), 0 states 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 00:52:38,928 INFO L81 ComplementDD]: Finished complementDD. Result has 72 states, 72 states have (on average 30.0) internal successors, (2160), 72 states have internal predecessors, (2160), 0 states have call successors, (0), 0 states 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 00:52:38,928 INFO L175 Difference]: Start difference. First operand has 1026 places, 2133 transitions, 79260 flow. Second operand 71 states and 623 transitions. [2023-11-29 00:52:38,928 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1085 places, 2320 transitions, 87224 flow [2023-11-29 00:52:56,318 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1045 places, 2320 transitions, 86652 flow, removed 71 selfloop flow, removed 40 redundant places. [2023-11-29 00:52:56,394 INFO L231 Difference]: Finished difference. Result has 1055 places, 2171 transitions, 84619 flow [2023-11-29 00:52:56,396 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=78691, PETRI_DIFFERENCE_MINUEND_PLACES=975, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2132, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1219, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=878, PETRI_DIFFERENCE_SUBTRAHEND_STATES=71, PETRI_FLOW=84619, PETRI_PLACES=1055, PETRI_TRANSITIONS=2171} [2023-11-29 00:52:56,396 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 1025 predicate places. [2023-11-29 00:52:56,396 INFO L495 AbstractCegarLoop]: Abstraction has has 1055 places, 2171 transitions, 84619 flow [2023-11-29 00:52:56,397 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 5.588235294117647) internal successors, (285), 51 states have internal predecessors, (285), 0 states have call successors, (0), 0 states 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 00:52:56,397 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 00:52:56,397 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:52:56,401 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5de6e5a5-dca5-4d1c-8175-3ad29fb43980/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2023-11-29 00:52:56,597 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5de6e5a5-dca5-4d1c-8175-3ad29fb43980/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2023-11-29 00:52:56,597 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 00:52:56,598 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:52:56,598 INFO L85 PathProgramCache]: Analyzing trace with hash 921603379, now seen corresponding path program 21 times [2023-11-29 00:52:56,598 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:52:56,598 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1817679267] [2023-11-29 00:52:56,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:52:56,598 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:52:56,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:52:57,636 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:52:57,637 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:52:57,637 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1817679267] [2023-11-29 00:52:57,637 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1817679267] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 00:52:57,637 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2029011836] [2023-11-29 00:52:57,637 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-29 00:52:57,637 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:52:57,637 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5de6e5a5-dca5-4d1c-8175-3ad29fb43980/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:52:57,638 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5de6e5a5-dca5-4d1c-8175-3ad29fb43980/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:52:57,639 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5de6e5a5-dca5-4d1c-8175-3ad29fb43980/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2023-11-29 00:52:57,780 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-29 00:52:57,780 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 00:52:57,782 INFO L262 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 51 conjunts are in the unsatisfiable core [2023-11-29 00:52:57,784 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:52:58,518 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2023-11-29 00:52:58,924 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:52:58,925 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:53:00,208 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 00:53:00,208 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 32 [2023-11-29 00:53:01,070 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:53:01,070 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2029011836] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 00:53:01,070 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 00:53:01,071 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18, 18] total 53 [2023-11-29 00:53:01,071 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [615297325] [2023-11-29 00:53:01,071 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 00:53:01,071 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2023-11-29 00:53:01,072 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:53:01,072 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2023-11-29 00:53:01,074 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=280, Invalid=2582, Unknown=0, NotChecked=0, Total=2862 [2023-11-29 00:53:01,198 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 30 [2023-11-29 00:53:01,198 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1055 places, 2171 transitions, 84619 flow. Second operand has 54 states, 54 states have (on average 5.5) internal successors, (297), 54 states have internal predecessors, (297), 0 states have call successors, (0), 0 states 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 00:53:01,198 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 00:53:01,198 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 30 [2023-11-29 00:53:01,198 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 00:53:42,060 INFO L124 PetriNetUnfolderBase]: 6443/13858 cut-off events. [2023-11-29 00:53:42,061 INFO L125 PetriNetUnfolderBase]: For 1647019/1647019 co-relation queries the response was YES. [2023-11-29 00:53:42,425 INFO L83 FinitePrefix]: Finished finitePrefix Result has 188885 conditions, 13858 events. 6443/13858 cut-off events. For 1647019/1647019 co-relation queries the response was YES. Maximal size of possible extension queue 783. Compared 129429 event pairs, 757 based on Foata normal form. 7/13864 useless extension candidates. Maximal degree in co-relation 188632. Up to 7982 conditions per place. [2023-11-29 00:53:42,507 INFO L140 encePairwiseOnDemand]: 13/30 looper letters, 1324 selfloop transitions, 1183 changer transitions 100/2609 dead transitions. [2023-11-29 00:53:42,508 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1119 places, 2609 transitions, 101197 flow [2023-11-29 00:53:42,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2023-11-29 00:53:42,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2023-11-29 00:53:42,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 752 transitions. [2023-11-29 00:53:42,509 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.30200803212851407 [2023-11-29 00:53:42,510 INFO L72 ComplementDD]: Start complementDD. Operand 83 states and 752 transitions. [2023-11-29 00:53:42,510 INFO L73 IsDeterministic]: Start isDeterministic. Operand 83 states and 752 transitions. [2023-11-29 00:53:42,510 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 00:53:42,510 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 83 states and 752 transitions. [2023-11-29 00:53:42,511 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 84 states, 83 states have (on average 9.060240963855422) internal successors, (752), 83 states have internal predecessors, (752), 0 states have call successors, (0), 0 states 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 00:53:42,513 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 84 states, 84 states have (on average 30.0) internal successors, (2520), 84 states have internal predecessors, (2520), 0 states have call successors, (0), 0 states 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 00:53:42,513 INFO L81 ComplementDD]: Finished complementDD. Result has 84 states, 84 states have (on average 30.0) internal successors, (2520), 84 states have internal predecessors, (2520), 0 states have call successors, (0), 0 states 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 00:53:42,513 INFO L175 Difference]: Start difference. First operand has 1055 places, 2171 transitions, 84619 flow. Second operand 83 states and 752 transitions. [2023-11-29 00:53:42,514 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1119 places, 2609 transitions, 101197 flow [2023-11-29 00:54:03,268 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1063 places, 2609 transitions, 100412 flow, removed 54 selfloop flow, removed 56 redundant places. [2023-11-29 00:54:03,378 INFO L231 Difference]: Finished difference. Result has 1103 places, 2348 transitions, 96271 flow [2023-11-29 00:54:03,381 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=83903, PETRI_DIFFERENCE_MINUEND_PLACES=981, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2171, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1012, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1073, PETRI_DIFFERENCE_SUBTRAHEND_STATES=83, PETRI_FLOW=96271, PETRI_PLACES=1103, PETRI_TRANSITIONS=2348} [2023-11-29 00:54:03,381 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 1073 predicate places. [2023-11-29 00:54:03,381 INFO L495 AbstractCegarLoop]: Abstraction has has 1103 places, 2348 transitions, 96271 flow [2023-11-29 00:54:03,381 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 54 states have (on average 5.5) internal successors, (297), 54 states have internal predecessors, (297), 0 states have call successors, (0), 0 states 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 00:54:03,382 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 00:54:03,382 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:54:03,387 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5de6e5a5-dca5-4d1c-8175-3ad29fb43980/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2023-11-29 00:54:03,582 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5de6e5a5-dca5-4d1c-8175-3ad29fb43980/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2023-11-29 00:54:03,582 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 00:54:03,582 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:54:03,583 INFO L85 PathProgramCache]: Analyzing trace with hash 1672541467, now seen corresponding path program 22 times [2023-11-29 00:54:03,583 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:54:03,583 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [151611377] [2023-11-29 00:54:03,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:54:03,583 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:54:03,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:54:04,471 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:54:04,471 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:54:04,472 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [151611377] [2023-11-29 00:54:04,472 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [151611377] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 00:54:04,472 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [604827813] [2023-11-29 00:54:04,472 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-29 00:54:04,472 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:54:04,472 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5de6e5a5-dca5-4d1c-8175-3ad29fb43980/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:54:04,473 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5de6e5a5-dca5-4d1c-8175-3ad29fb43980/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:54:04,474 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5de6e5a5-dca5-4d1c-8175-3ad29fb43980/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2023-11-29 00:54:04,966 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-29 00:54:04,967 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 00:54:04,968 INFO L262 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 47 conjunts are in the unsatisfiable core [2023-11-29 00:54:04,970 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:54:05,518 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 3 [2023-11-29 00:54:09,864 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:54:09,864 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:54:10,903 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 00:54:10,903 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 24 [2023-11-29 00:54:11,474 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:54:11,474 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [604827813] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 00:54:11,474 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 00:54:11,474 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 17, 16] total 50 [2023-11-29 00:54:11,474 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [293208675] [2023-11-29 00:54:11,474 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 00:54:11,474 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2023-11-29 00:54:11,475 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:54:11,475 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2023-11-29 00:54:11,476 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=258, Invalid=2292, Unknown=0, NotChecked=0, Total=2550 [2023-11-29 00:54:11,531 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 30 [2023-11-29 00:54:11,532 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1103 places, 2348 transitions, 96271 flow. Second operand has 51 states, 51 states have (on average 5.588235294117647) internal successors, (285), 51 states have internal predecessors, (285), 0 states have call successors, (0), 0 states 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 00:54:11,532 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 00:54:11,532 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 30 [2023-11-29 00:54:11,532 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 00:54:46,450 INFO L124 PetriNetUnfolderBase]: 6977/15049 cut-off events. [2023-11-29 00:54:46,450 INFO L125 PetriNetUnfolderBase]: For 1991463/1991463 co-relation queries the response was YES. [2023-11-29 00:54:46,857 INFO L83 FinitePrefix]: Finished finitePrefix Result has 212692 conditions, 15049 events. 6977/15049 cut-off events. For 1991463/1991463 co-relation queries the response was YES. Maximal size of possible extension queue 908. Compared 144364 event pairs, 1132 based on Foata normal form. 4/15052 useless extension candidates. Maximal degree in co-relation 212405. Up to 8479 conditions per place. [2023-11-29 00:54:46,962 INFO L140 encePairwiseOnDemand]: 14/30 looper letters, 1484 selfloop transitions, 1285 changer transitions 30/2801 dead transitions. [2023-11-29 00:54:46,962 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1168 places, 2801 transitions, 114212 flow [2023-11-29 00:54:46,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2023-11-29 00:54:46,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2023-11-29 00:54:46,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 745 transitions. [2023-11-29 00:54:46,964 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3104166666666667 [2023-11-29 00:54:46,964 INFO L72 ComplementDD]: Start complementDD. Operand 80 states and 745 transitions. [2023-11-29 00:54:46,964 INFO L73 IsDeterministic]: Start isDeterministic. Operand 80 states and 745 transitions. [2023-11-29 00:54:46,965 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 00:54:46,965 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 80 states and 745 transitions. [2023-11-29 00:54:46,966 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 81 states, 80 states have (on average 9.3125) internal successors, (745), 80 states have internal predecessors, (745), 0 states have call successors, (0), 0 states 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 00:54:46,969 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 81 states, 81 states have (on average 30.0) internal successors, (2430), 81 states have internal predecessors, (2430), 0 states have call successors, (0), 0 states 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 00:54:46,969 INFO L81 ComplementDD]: Finished complementDD. Result has 81 states, 81 states have (on average 30.0) internal successors, (2430), 81 states have internal predecessors, (2430), 0 states have call successors, (0), 0 states 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 00:54:46,969 INFO L175 Difference]: Start difference. First operand has 1103 places, 2348 transitions, 96271 flow. Second operand 80 states and 745 transitions. [2023-11-29 00:54:46,969 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1168 places, 2801 transitions, 114212 flow [2023-11-29 00:55:20,050 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1128 places, 2801 transitions, 113599 flow, removed 217 selfloop flow, removed 40 redundant places. [2023-11-29 00:55:20,143 INFO L231 Difference]: Finished difference. Result has 1172 places, 2558 transitions, 110209 flow [2023-11-29 00:55:20,145 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=95772, PETRI_DIFFERENCE_MINUEND_PLACES=1049, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2348, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1083, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1153, PETRI_DIFFERENCE_SUBTRAHEND_STATES=80, PETRI_FLOW=110209, PETRI_PLACES=1172, PETRI_TRANSITIONS=2558} [2023-11-29 00:55:20,145 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 1142 predicate places. [2023-11-29 00:55:20,145 INFO L495 AbstractCegarLoop]: Abstraction has has 1172 places, 2558 transitions, 110209 flow [2023-11-29 00:55:20,145 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 5.588235294117647) internal successors, (285), 51 states have internal predecessors, (285), 0 states have call successors, (0), 0 states 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 00:55:20,145 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 00:55:20,146 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:55:20,150 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5de6e5a5-dca5-4d1c-8175-3ad29fb43980/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2023-11-29 00:55:20,346 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5de6e5a5-dca5-4d1c-8175-3ad29fb43980/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2023-11-29 00:55:20,346 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 00:55:20,346 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:55:20,346 INFO L85 PathProgramCache]: Analyzing trace with hash 545317079, now seen corresponding path program 23 times [2023-11-29 00:55:20,347 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:55:20,347 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [901587781] [2023-11-29 00:55:20,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:55:20,347 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:55:20,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:55:21,384 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:55:21,384 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:55:21,384 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [901587781] [2023-11-29 00:55:21,385 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [901587781] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 00:55:21,385 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [196871990] [2023-11-29 00:55:21,385 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-29 00:55:21,385 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:55:21,385 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5de6e5a5-dca5-4d1c-8175-3ad29fb43980/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:55:21,386 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5de6e5a5-dca5-4d1c-8175-3ad29fb43980/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:55:21,388 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5de6e5a5-dca5-4d1c-8175-3ad29fb43980/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2023-11-29 00:55:21,852 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 00:55:21,852 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 00:55:21,854 INFO L262 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 46 conjunts are in the unsatisfiable core [2023-11-29 00:55:21,855 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:55:22,311 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 3 [2023-11-29 00:55:24,089 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:55:24,089 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:55:25,016 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 00:55:25,016 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 51 treesize of output 43 [2023-11-29 00:55:25,782 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:55:25,782 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [196871990] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 00:55:25,782 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 00:55:25,782 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 17, 16] total 50 [2023-11-29 00:55:25,783 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [685217554] [2023-11-29 00:55:25,783 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 00:55:25,783 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2023-11-29 00:55:25,783 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:55:25,784 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2023-11-29 00:55:25,784 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=268, Invalid=2282, Unknown=0, NotChecked=0, Total=2550 [2023-11-29 00:55:25,797 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 30 [2023-11-29 00:55:25,798 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1172 places, 2558 transitions, 110209 flow. Second operand has 51 states, 51 states have (on average 5.588235294117647) internal successors, (285), 51 states have internal predecessors, (285), 0 states have call successors, (0), 0 states 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 00:55:25,798 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 00:55:25,798 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 30 [2023-11-29 00:55:25,798 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand